Post by: ikonsgr on 20:20, 05 January 19
What i'm going to present you here,is a "Universal" serial interface for Amstrad CPC (or USIfAC (Universal Serial Interface for Amstrad CPC) naming courtesy of Gunhed :) )
Although i know that other serial interfaces for amstrad cpc already exist, this one offer many innovations that makes it a rather modern, cheap and useful solution:
- Completely "from the scratch" project,based on a modern 8bit PIC 16F1579@32Mhz MicroController!
(all other serial interface projects, use the rather old, expensive and bulky 40pin 16C550 UART chip)
- Very easy to use by only two BASIC commands, INP() and OUT!
- Completely free DIY project, rather easy and cheap to make (total cost for the DIY kit +all extra parts, would be less than 6euros!).
- SUPER FAST loading of many games/programs, DIRECTLY from the PC!(see "Direct Load" function in User's Guide, and here (https://www.dropbox.com/sh/hzp3a4b7fktcn8c/AAAj2U8otKw26j-chnd8uUxla?dl=0) is a list of games already tested and working)
- Easy and fast transfer of dsk images directly to Amstrad CPC disks!
- Easy and fast individual file transfer (https://www.dropbox.com/s/zzl18w9f5dljj9c/GAMES.zip?dl=0) (check link for 1000's of games extracted from dsk images)directly from/to Amstrad's Disks!
- Equipped with a reset button and a pause switch for Amstrad CPC!
And here is a small demonstration: Playing PONG in network with a Commodore 64! (https://www.youtube.com/watch?v=l9rWsShqKsE) :D
You can find everything you will need here (https://www.dropbox.com/s/0z2cpcbxvl95s9v/Amstrad%20CPC%20serial%20interface.zip?dl=0), it contains:
-The circuit diagram,
-The gerber files for the pcb,
-The bill of materials,
-The Pic 16F1579 microcontroller Hex file (you will need a pickit2/3 (https://www.ebay.ie/sch/i.html?_from=R40&_trksid=p3984.m570.l1313.TR7.TRC1.A0.H0.XPickit.TRS0&_nkw=Pickit&_sacat=0) in order to flash it into PIC 16F1579),
-Amstrad’s utility dsk image disk (you can transfer it to a real disk with CPCDISKXP (http://www.cpcmania.com/cpcdiskxp/cpcdiskxp.htm) using an ide or a usb 3.5" floppy Drive),
-The PC utility program,along with CPCLOADER (for easy extracting dsk images) and a folder including the utility disk files,for direct loading from PC using "Direct Load" function,
-The User's Guide.
I have also developed a windowsprogram which you can use it to comunicate with Amstrad:
It can be used for terminal file transfer, dsk image transfer, and RUN many games/programs directly from PC!
Serial Interface is equipped with a big receive buffer of 920 bytes (more than 3.5X the buffer of the classic 16C550 UART chip, or booster/booster+ adapters), and can achieve speeds up to 576000bps, using a direct usb2serial cable adapter, or 460800bps using a Bluetooth or Wifi Module.
Serial interface can be used with a USB2serial cable adapter (https://www.ebay.ie/itm/USB-To-RS232-TTL-USB-To-COM-Serial-Adapter-Cable-Module-PL2303HX/181921199283?hash=item2a5b5934b3:g:xL0AAOSwo0JWOFVL:rk:1:pf:0) (PL2303HX), an HC-05 Bluetooth module (https://www.ebay.ie/itm/1-2-5-10PCS-HC-05-6-Pin-Wireless-Bluetooth-RF-Transceiver-Module-Serial/302097888911?var=600910990260), a WiFi module (an ESP-07 (https://www.ebay.ie/itm/ESP-07-ESP8266-Remote-Serial-Port-WIFI-Module-V1-0-ESP-Adapter-Plate-Expansion/282765960472?ssPageName=STRK%3AMEBIDX%3AIT&var=582047875339&_trksid=p2057872.m2749.l2649) or an ESP-01 (https://www.ebay.ie/itm/ESP8266-ESP-01S-Serial-WIFI-Wireless-Transceiver-Module-Send-Receive-AP-STA/302181509741) along with a 5V adapter (https://www.ebay.ie/itm/ESP8266-ESP-01-01S-02-03-04-05-06-07-08-09-10-11-12-12E-12F-13-14-WIFI-Module/262852020763?ssPageName=STRK%3AMEBIDX%3AIT&var=561850933808&_trksid=p2057872.m2749.l2649)) or even this (http://www.hobbytronics.co.uk/usb-host-mini) Usb host board which, depending on loaded software, can host many different USB devices, like USB modems, flash drives, keyboard,mouses, joysticks, Midi interfaces etc. So, if you connect this usb host module to the serial inerface ,ALL of these devices can potentially communicate with amstrad cpc!
In practice, any device with a UART interface can be connected!
So, first let's take a look at the circuit (https://www.dropbox.com/s/sxj0objy1xctg0l/schematic.jpg?dl=0). And this is the pcb board (https://www.dropbox.com/s/31z65d5t8i7u8tb/DSCN1147.JPG?dl=0).
(https://www.dropbox.com/s/31z65d5t8i7u8tb/DSCN1147.JPG?dl=0)
You can connect it to an external port raiser adapter like MX4 board, or directly to Amstrad’s Expansion port using this (https://www.dropbox.com/s/ka6m4fyqangan30/DSCN1148.JPG?dl=0) adapter.
Interface usage, is pretty simple and straight forward. Communication with the device is accomplished using only two ports:
&FBD1: The control port
&FBD0: the data port
And the two BASIC commands INP() for receive and OUT for send.
To send a byte, just give the BASIC command:
OUT &FBD0,x (x:0-255)
Or on assembler, the instructions:
LD A,x (x:0-255)
LD BC,&FBD0
OUT (C),A
To receive a byte, you must first check if there is any byte available at the buffer, by reading the control port.
Use the BASIC command: INP(&FBD1). If it returns ‘255’, there is a byte available, if not, it returns ‘1’.
So, in order to receive a byte from serial port, you just give the BASIC command:
IF INP(&FBD1)=255 THEN A=INP(&FBD0) (variable A contains the received byte)
And if you want to wait until a byte is available, you can use a small loop like:
WHILE INP(&FBD1)=1:WEND:A=INP(&FBD0)
And here is the assembly code for doing the same thing:
check_BYTE:
LD A,&FB
iN A,(&D1)
DEC A
JR Z,check_BYTE
ld a ,&FB
in a,(&D0)
Accumulator A now has the received byte.
You can also give various commands to the interface (OUT &FBD1,x), using the control port, like reset interface, change serial port speed, clear receive buffer and some other.
And If anyone wants a ready made Serial interface, i can offer:
- A ready made board for 8euros+shipping (2.5euros for standard, 5euros registered/tracked).
- A Basic DIY kit for 4euros,including postage. You will get the PCB board and PIC 16F1579 (flashed with the program).All other parts can be easily found in any electronic parts shop,check Bill of Materials here (https://www.dropbox.com/s/0z2cpcbxvl95s9v/Amstrad%20CPC%20serial%20interface.zip?dl=0))
- A Complete DIY kit for 6euros,including postage. This DIY kit will have everything:PCB board+PIC 16F1579 (flashed with the program)+4002Logic Chip+DIP sockets+Pause switch+reset button+resistors+caps+bjt+diode
- Extra Edge connector adapter costs +2euros.
- Extra Centronics connector adapter costs +5euros.
Having a cheap, easy to make and easy to use Serial port, and considering the strong and vivid program community for Amstrad CPC, it could open many prospects for future developments, like LAN or WAN games, Apps for communicating with smart phones and tablets, even a basic Web client... ;)
Post by: GUNHED on 22:57, 05 January 19
What I would love to see are:
- A way bigger buffer, because with that high transfer rates 1 KB buffer is filled up literally in no time. So a buffer of at least 16 KB would be helpful.
- Either a 2nd port or a RS4xx, to enable a network of a ring of CPC computers. Great fun on meetings.
That's just my 3 Pfennige, since I'm more a software person I don't know if this is doable. :)
Good luck with it anyway, look great! :)
Post by: ikonsgr on 01:52, 06 January 19
My intention was to design a small, cheap and easy to make (and use) serial port, that everyone with a soldering iron and a few euros, could make it by himself! ;)
As for your requests,at one thing, it's difficult to find 8bit Microcontroller with 16+KB of ram, and they would be rather expensive too.But i think that a nearly 1Kb receive buffer, is already pretty much (16C550 UART and booster boards have much smaller buffers of ~250bytes), and believe me, if you use assembly code, it's easy to empty the buffer really fast too! :-) In anycase, you will always need to have some transfer control for fast speeds ,regardless of the buffer size you have. One good solution for example,is, for the sender to transmit a packet of bytes at the size of buffer at once, and then wait for acknowledge, to send the next. As for the networks, it's easy to make one ,using the WiFi modules! These WiFi ESP8266 modules can either connect or create TCP servers! So, you can have one Amstrad with a serial interface and a WiFi module running a TCP server, all other amstrads can connect to this server as TCP clients,and here is your Amstrad CPC network! ;-)
Post by: ComSoft6128 on 11:27, 06 January 19
I'd like to buy one for a 6128 Plus.
Cheers,
Peter
Post by: ikonsgr on 13:18, 06 January 19
Ok, peter, send me your address with a pm or to my email ikonsgr745@hotmail.com to arrange it then.
Now,i think you're gonna love this, INDIVIDUAL file transfers from/to 3" disks was the reason i design this interface at the first place! :)
I have dozens of 3" disks ,from the good old era, with many programs and listings me and friends had made, but the procedure to transfer them to a pc for safe keeping was somewhat combersome and timeconsuming, as all existed transfer methods are for copying hole disks or dsk images at once! So, i had to copy 3"disks to 3.5" disks using discology, and then (using an old pc that has an ide floppy drive), transfer the 3.5" disk to a dsk image using cpcdiskxp...
Now,i can just select individual files from a 3" disk and with a press of a button, transfer them directly to my pc! And, after a lot of study and work (http://www.cpcwiki.eu/index.php/Programming:Read/Write_a_file_quickly_byte-by-byte),i've managed to do it rather fast too, it takes less than 15seconds to transfer a hole 42kb game from 3"disk to pc, and about 20seconds for writing it back to a disk from pc!
In 2 words, having this interface, allows you to use your amstrad without needing ANYTHING extra, either a 3.5" drive, or a gotek emulator drive, just a good old 6128 with a bunch of 3" disks! ;)
Post by: ComSoft6128 on 13:30, 06 January 19
Will PM to organise.
Thanks,
Peter
Post by: GUNHED on 15:41, 06 January 19
Since I'm not familiar with WiFi at all: Do we need a WiFi router unit for this, or do we just need some CPCs with your card + Wifi module?
Also: How would this look like from the software side?
This would be really a great thing, to have a network based on CPCs (without PCs). :) :) :)
Post by: ikonsgr on 18:22, 06 January 19
So, if you have a bunch of amstrad cpc's with serial interfaces and wifi modules installed, you can set the tcp server and the access point at one of them, and then, all the others can connect to this access point, get ip's, and then connect to the tcp server, and thus create an Amstrad CPC-only wireless LAN,without even needing a router!It might sound complicated, but it's really a matter of a few AT commands to do all this!
I already have a small section in my user guide, that has a small list of the most useful AT commands, although the complete AT user manual (https://www.dropbox.com/s/wetg5asxy6nynst/4a-esp8266_at_instruction_set_en.pdf?dl=0) for the wifi module supports 100's of commands!
Post by: GUNHED on 19:13, 06 January 19
Post by: ikonsgr on 11:19, 07 January 19
That really sounds awesome! Now we need somebody who can use AT commands and tell us how to make such a CPC LAN. :) :) :)
Well,it's so easy to do it, that i'm pretty sure ,if you take a look at the user's guide and the BASIC terminal program, that "somebody" may well be... you! ;)
Post by: ComSoft6128 on 17:09, 07 January 19
Post by: LambdaMikel on 17:32, 07 January 19
Exactly! Esp8266 it's really a marvel-chip, apart from creating a tcp server or connecting to another, it can be also used as an access point!Isn't that chip also on the M4 board?
(well or related, it has the ESP12F)
Post by: ikonsgr on 15:54, 08 January 19
Isn't that chip also on the M4 board?I suppose so, the chip is actually called ESP8266, and comes either as plain chip on a board or on board various pcbs for easier communication with existing hardware like ESP-01, ESP-07 which only need Tx, Rx and power supply connections.
(well or related, it has the ESP12F)
Post by: GUNHED on 23:13, 08 January 19
Post by: ikonsgr on 00:59, 09 January 19
Apart from the bluetooth and WiFi modules mentioned, there is also this (http://www.hobbytronics.co.uk/usb-host-mini) Usb host board which can be connected directly to the serial interface,and depending on loaded software, can host many different USB devices, like USB modems, flash drives, keyboard,mouses, joysticks, Midi interfaces...
So if you connect this usb host module to the serial inerface ALL of these devices can potentially communicate with amstrad cpc!
Hmmm, read/write files to usb flash drives? That sounds nice...
or maybe, sending SMS messages with your CPC? That sounds fun too...
And what someone could possibly do with a Synthesizer connected to an Amstrad CPC through midi?.... Infinite prospectives! :D
It would be only a matter of developing the software on amstrad cpc to do this! And considering the simplicity and ease of use of the serial interface, it would be rather easy to develop such programs even using locomotive BASIC! ;)
Post by: rpalmer on 05:31, 09 January 19
rpalmer
Post by: LambdaMikel on 07:32, 09 January 19
Post by: LambdaMikel on 07:35, 09 January 19
to connect any modern device such as USB the CPC would need a driver of significant code in order to get it to work at all.depends. there are certainly also rs232 / serial devices which have the controller and driver "on board" and don't need complicated drivers.
rpalmer
Post by: ikonsgr on 10:54, 09 January 19
to connect any modern device such as USB the CPC would need a driver of significant code in order to get it to work at all.
rpalmer
Fortunately for us, the "driver" needed for a usb device, is already implemented in the usb host module firmware mentioned! Take a look here (http://www.hobbytronics.co.uk/usb-host-mini) and select "related products" tab.
All the "dirty" work needed for identify,nagotiate and establish connection with a usb device, is done from host module!
After that, you can perfectly communicate directly with the device through serial port simply by sending/receiving bytes/characters using simple inp() and out commands, even using BASIC! ;)
Post by: rpalmer on 14:20, 09 January 19
Well yes you are correct that this device appears to have done all of the work to convert the "serial" to "USB".
Fortunately for us, the "driver" needed for a usb device, is already implemented in the usb host module firmware mentioned! Take a look here (http://www.hobbytronics.co.uk/usb-host-mini) and select "related products" tab.
All the "dirty" work needed for identify,nagotiate and establish connection with a usb device, is done from host module!
After that, you can perfectly communicate directly with the device through serial port simply by sending/receiving bytes/characters using simple inp() and out commands, even using BASIC! ;)
There is still the matter of a driver to handle such things as protocols like USB packets from Wifi, keyboard, mass media and so on. This i feel is where the majority of the work will be for a CPC to use such a device. Also dont forget a USB device is not one in which it provides an interrupt to the host meaning the CPC would constantly be polling it for status if done entirely in S/W and would need to handle what ever packet sizes the USB could issue (not impossible, but can be very difficult to handle and by all means give it a go).
I could easily imagine though a H/W device much along the line of a CPC I/O port to a simple PIC chip which then interacts with the above attached USB device. The pic chip would then interrupt the CPC following the Z80 protocols.
rpalmer
Post by: ikonsgr on 15:34, 09 January 19
Ok, you have the serial interface, but in order to use it, you need to have some utlitites on your amstrad.
Of course i give you a utility disk image, but the "problem" is that you need first to transfer it to a disk (or to a usb stick if you have a gotek/hxc drive), in order to use it...
How nice would it be, if you didn't need to do that, and be able to use the serial interface to transfer programs, games,utilities,DIRECTLY, having ONLY a plain Amstrad CPC...
Well, now you can do that! ;)
The "trick" to accomplish this, is by using a small BASIC program loader, that initally copies the assembly routine for file transfers from PC to CPC, DIRECTLY to Amstrad's memory, and then it's executed, in order to transfer files to a floppy disk!
Procedure is very simple and fast:
First, type and save this small BASIC listing to your Amstrad CPC:
10 MODE 2:MEMORY &7FFF
20 OUT &FBD1,0:OUT &FBD1,1
30 FOR I=0 TO 127
40 WHILE INP(&FBD1)=1:WEND
50 POKE &8000+I,INP(&FBD0)
60 NEXT I
70 OUT &FBD1,0:OUT &FBD1,1
80 PRINT"waiting for file..."
90 WHILE INP(&FBD1)=1:WEND
100 OUT &FBD0,9:OUT &FBD1,2:CALL &8000
120 PRINT"file copied":OUT &FBD1,3:GOTO 70
Run the program, and open the Communication Utility on your PC, press 'Connect button' to establish a serial connection,and then press “Cold Start” Button. (function selection must be set to ‘Terminal’ and serial Speed to ‘115200’)
After a few seconds,you should get a “waiting for file…” message on your Amstrad screen. Now select “File copy to CPC” from Function selection list, press ‘select files’ button,and select the files “PC2CPC.BAS” and “PC2CPC.BIN” inside "Amstrad Utility disk files" subfolder in program’s folder. After a few seconds the 2 files should be transferred to your 3” disk.
Now, you can reset your Amstrad and run the “PC2CPC” utility, in order to transfer any other program, utility or game you want from PC!
I have updated the PC utility program and add the procedure to the User's guide, along with some extra Wifi AT commands (useful for making a wireless "Amstrad cpc only" network!)
Post by: GUNHED on 16:44, 10 January 19
Well, I would like to order 5 of these boards (or DIY kits). Please PM me the details. It's a great device for a great price and it has the potential to become a new network / communication standard. :)
EDIT: MX4 version please. ;) :)
Post by: asertus on 17:32, 10 January 19
I am interested in 2 of them, with adapters.
THanks.
Post by: ikonsgr on 19:04, 10 January 19
It's a great device for a great price and it has the potential to become a new network / communication standard. :)
Well, that exactly was my intention! It surely has all the "requirements" for that: DIY,Cheap,easy to make and use.
If it get's enough acceptance from the community, it can surely become a standard. ;)
Post by: ikonsgr on 19:15, 10 January 19
I've uploaded a new utility disk image, i add a small FORMAT utility (i compiled this (http://www.cpcwiki.eu/index.php/Programming:A_simple_disc_formatter_using_BDOS_functions) assembly code from CPCWIKI with maxam, hope there is no problem wtih that), and revised the User's Guide with some extra info.Also i upload a big collection of many games extracted from disk images ,(you can find them in the 1st post), in order to easy transfer them to disks using the PC to CPC function.
Post by: Etegar on 19:46, 12 January 19
Very interesting project. I would like to order 1 board if it's available with the edge connector adapter.
Thanks
Post by: Dandare on 18:16, 13 January 19
Nice project,
I'm curious: at 32Mhz, a pic16 runs one instruction each 125ns.
Given that you need to identify the port, whether it's read or write, and either capture the bus or put the right response back in the bus (and take it out before the next instruction), I would say the timing is almost impossible to get right, considering you have less than 1us (8 pic asm instructions) to do it all.
Congratulations on the achievement. I can't imagine how you do it unless you are inserting wait states like there's no tomorrow :)
(Does that pause switch gives a hint about this?)
Post by: ikonsgr on 23:50, 13 January 19
Nice project,
I'm curious: at 32Mhz, a pic16 runs one instruction each 125ns.
Given that you need to identify the port, whether it's read or write, and either capture the bus or put the right response back in the bus (and take it out before the next instruction), I would say the timing is almost impossible to get right, considering you have less than 1us (8 pic asm instructions) to do it all.
Congratulations on the achievement. I can't imagine how you do it unless you are inserting wait states like there's no tomorrow :)
(Does that pause switch gives a hint about this?)
You are right, there is NO way all these to be done in less than 1uS, unless you have a PIC running at 200Mhz... :D
So, of course amstrad need to be paused when circuit is activated (you just force "READY" signal to low and Amstrad can freeze.... for ever!),although the hole code execution for each sent/received byte is done in a few microseconds!
Now, apart from the need of instant activation of the curcuit and pausing of amstrad (which in the end ,was done using a logic gate chip, it was really impossible to do it using the pic and software routine, as they were too slow even @32Mhz),the most difficult part, was the correct reading of a byte from serial port! The precise latch/unlatch of PIC's data port to amstrad's data bus, seemed to be impossible to achieve!
At some stage of development,i was so frustrated of not being able to sync everything right, that i thought the only way to do it, was using an extra octal 3state buffer chip (which is as big as the PIC itself ::) ), between cpc's 8bit data bus and pic's data port, and enable it by IORQ signal (so the buffer would "automatically" make the correct "latch/unlatch" of pic's port to cpc's data port).
But then suddenly...an idea "hits me": studying in detail how Z80's is reading a byte from a port and combining this knowledge with the way Amstrad allows access of I/O buses to Z80, i managed to resolve this, by using only a small rudimentary "sample & hold" circuit (just a small diode and a capacitor) of the READY signal that fed a pic's input pin! You see,i discover that in the proccess of reading a byte from a port, i can ensure that the byte was "downloaded" correctly to accumulator when the 1st high pulse of ready signal occured AFTER unpausing amstrad. So what i did, was, unpause amstrad for 0.25uS (e.g. 1cycle @4mhz, exactly the clock of Z80 ;) ) and then repause it again. If in this time, the "sample & hold" pin was High, it means that byte was taken, and i could proceed to unlatching Pic's data port from amstrad's data bus and unpause amstrad completely! If not, then i issue again a 0.25uS cycle of "unpause/pause" and do the same check! That way, i managed to "bit bang" pic's port at exactly the correct time and with the minimum ovehead ,the hole check of "sample & hold" code, each time amstrad is paused, executes in only 0.5us!
I began to deal with this project since summer of 2017, and have spent literally many 100's of hours on this! In the process, i got involved with assembly programming (i even developed a code (http://www.cpcwiki.eu/forum/programming/how-to-readwrite-a-file-'byte-by-byte'-using-firmware-but-much-faster!/msg162099/#msg162099) for fast read/write files byte by byte using firmware, because of this project!), DELPHI programming on the PC, PIC programming, basic programming on CPC, learn to configure and use bluetooth modules, wifi modules, usb to serial interfaces,and ofcourse design the schematics and the pcb board for the circuit...
To get an idea, i began with this:
https://www.dropbox.com/s/g1zvz97hb67oql6/DSCN0752.JPG?dl=0 (https://www.dropbox.com/s/g1zvz97hb67oql6/DSCN0752.JPG?dl=0)
Which is evolved to this :
https://www.dropbox.com/s/dv9fo1zi7k6cpij/PROTOTYPE2.JPG?dl=0\ (https://www.dropbox.com/s/dv9fo1zi7k6cpij/PROTOTYPE2.JPG?dl=0\)
And finally end up to the pcb board shown in the 1st post...
Surely, it was a lot of trouble but, i did it *mostly* as a hobby, a fun of making something creative, and in the end, sharing any knowledge and achievement with the community!
Long live Amstrad CPC! :)
Post by: Dandare on 11:00, 14 January 19
just a hint for future projects you may get yourself involved with: (Maybe you already know about it)
PICs with a Parallel Slave Port (http://ww1.microchip.com/downloads/en/DeviceDoc/31010a.pdf) will save you a lot of trouble and will let you interface with the CPC without wait states.
Downside is you'll have to go to a 40pin package at least to get that peripheral.
Post by: ikonsgr on 21:24, 14 January 19
Anyway, if the "smallest" pic with such feature is with 40pins, i'm afraid it's way too large, bulky and with "overkill" pincount (and probably much more expensive at least newer models with internal 32Mhz clock) for this project.
My first priority when i was looking for a suitable PIC, was to be able to operate at least @32Mhz (with internal osc), have 1Kb RAM, Hardware Uart, and have the minimum pin count for my needs (20 or 28 at most). Besides 16F1579, there is another "pin compatible" and with similar features PIC ,16F1459 which operates at 48Mhz. I haven't tested yet, but i believe it can work directly (just with a different Hex file ofcourse) on the same board, and so you can have a "Turbo" version of the serial interface ,+50% faster!
Post by: ikonsgr on 10:42, 17 January 19
With this, anyone can easily build the board by himslef, needing only a soldering iron! ;)
Post by: LambdaMikel on 17:14, 17 January 19
I'd like to order 2 - assembled, if possible :) Please send me PM for payment instructions.
CheersMichael
Post by: krusty_benediction on 10:05, 18 January 19
Post by: Duke on 15:19, 18 January 19
Nice project@Duke: do you think it can be used in association with the M4 in order to debug a CPC runing application from the PC ?. The M4 read memory from the CPC and send it to the PC through this interfaceActually the M4 board already has a serial port exposed, its labelled (TX,RX,GND) on the top header, I can enable access to it, if anyone wants to use it.
Could it or @ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) serial port be used as link for debugging, probably yes :)
@ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) , nice project!
Post by: remax on 20:24, 18 January 19
Actually the M4 board already has a serial port exposed, its labelled (TX,RX,GND) on the top header, I can enable access to it, if anyone wants to use it.
Could it or @ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) serial port be used as link for debugging, probably yes :)
@ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) , nice project!
On which one would it be the easiest to have an RS232 port ? I'd love to test one of the wifi modems available (Retro Wifi SI (https://www.simulant.uk/shop/retro-computers-games-consoles/amstrad-cpc/retro-vintage-computer-wifi-modem-rs232-serial-hayes-compatible) or Wifi232 (http://biosrhythm.com/?page_id=1453))
(or perhaps one or both make those wifi modems not necessary ?)
Post by: ikonsgr on 22:22, 18 January 19
On which one would it be the easiest to have an RS232 port ? I'd love to test one of the wifi modems available (Retro Wifi SI (https://www.simulant.uk/shop/retro-computers-games-consoles/amstrad-cpc/retro-vintage-computer-wifi-modem-rs232-serial-hayes-compatible) or Wifi232 (http://biosrhythm.com/?page_id=1453))
(or perhaps one or both make those wifi modems not necessary ?)
Well, as far as my serial interface is concerned, legacy devices that require "full feature" RS232 port with all extra signals like DTR, DSR, RTS etc are not supported.
But as you already said, you don't actually need any kind of these modems anymore,since you can connect directly to internet using the Wifi module, either with M4 board or serial interface!
Post by: GUNHED on 01:03, 19 January 19
Actually the M4 board already has a serial port exposed, its labelled (TX,RX,GND) on the top header, I can enable access to it, if anyone wants to use it.Yes, please, so we can connect. :)
Post by: VincentGR on 01:59, 19 January 19
Post by: Audronic on 02:18, 19 January 19
Please see a PM from me
thanks Ray
Post by: Etegar on 14:37, 27 January 19
Thanks John, board received and tested this weekend with my usb2serial cable. All your aplications are working fine !!!!
I,m surprised especially with the transfer speed time (set at 115200 for default). It takes really few seconds in transferring a file from PC to CPC (directly to the 3” Disk). I supose that wifi conected modules will do the same quickly job as the usb2serial cable.
When the dsk transfer utility will be finished this really will save time and inconveniences with another hardware solutions.
You have done a great job and this board. Please go on with this project.
Eduard
Post by: ikonsgr on 02:18, 28 January 19
I will surely add dsk image transfer support in the future, but currently i'm working on,IMO, an even more interesting project:
direct load and run of programs from PC, with blazing fast speeds of ~twice the actual disk loading speed! (for example, load and run of a single 42kb binary game takes ~4seconds!!!)
I use a similar procedure with the "Cold start" function, you only need to type a small basic program (to enable the transfer of the assembly routine from PC to Amstrad), and then using redirections of firmware's loading routines (e.g. some pokes), you can use the very same BASIC commands, RUN"" and LOAD"", to directly load and execute programs from PC! :)
I've already manage to use it for load and execute of BASIC programs and single Binary files, and now i'm working the direct execution of games with multiple files (which proved much more difficult thing to do...) . I believe i'll have it ready soon for anyone to use it. And it would be very interesting to see if it will work on a CPC 464 too, thus, providing a cheap,easy and super fast solution of loading games and programs on the "Cassette only" 464!
It would be the revenge of the CPC 464, loading games, twice as fast as a CPC 6128 with disks! ;)
Post by: HAL 6128 on 08:52, 28 January 19
... you only need to type a small basic program (to enable the transfer of the assembly routine from PC to Amstrad), and then using redirections of firmware's loading routines (e.g. some pokes), you can use the very same BASIC commands, RUN"" and LOAD"", to directly load and execute programs from PC......how about creating a ROM which brings the CPC after booting in some kind of "listening" mode? Maybe also interesting for cross-compiling?
Post by: ikonsgr on 15:41, 28 January 19
Also, in order to use a ROM for amstrad to read from it, the circuit must implement full 16bit address decoding and most probable "on the fly" reading! That would require a much bigger PIC (possibly with 40pins) and far more complicated circuit... ::)
Post by: GUNHED on 18:40, 31 January 19
Post by: GUNHED on 18:54, 31 January 19
...for example, load and run of a single 42 kb binary game takes ~4 seconds!!!Using FutureOS it takes about 2,7 seconds ;D But I'm sure the serial interface can do even better! :)
Post by: LambdaMikel on 17:32, 01 February 19
Post by: ikonsgr on 19:51, 01 February 19
What do you mean with 16 Bit address? Doesn't it decode the 16 bit I/O completely? If yes, which are the shaddow ports?
Nope, just 2 address bit needed A5 and A10 (and the A0 which used for having data & control port). Of course the address bit selection was not random,but it's based on Amstrad's I/O port allocation:
http://www.cpctech.org.uk/docs/iopord.html
If you take a look there, you will see that, A10=0 defines I/O peripherals, and A5=0 a serial port. These 2 address bits, are combined with M1 and I/O request signals (when IORQ=0 and M1=1 means exclusively Input/Output request) to enable interface exclusively on ports &FBD0-FBDF! ;-) And that way, i was able to implement address decoding using a small and cheap logic gate chip! ;)
Post by: GUNHED on 14:17, 03 February 19
Post by: ikonsgr on 10:35, 05 February 19
Post by: GUNHED on 21:32, 06 February 19
But back to the USIfAC (Universal Serial Interface for Amstrad CPC): I'm looking forward to work with it. In two weeks I start to have more time for computers again and the handling of the USIfAC can't be more easy. :) :) :)
Post by: GUNHED on 04:06, 24 February 19
Thank you very much, the quality is great too! :) :) :)
Post by: LambdaMikel on 05:52, 24 February 19
Received my five cards, now it's time to get some CPCs networked! ;D ;D ;DMy 2 also arrived, and great quality as well - didn't have a chance to test them yet though.
Thank you very much, the quality is great too! :) :) :)
Thanks @ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) !! :)
Post by: ikonsgr on 12:19, 24 February 19
Now,i'm happy to announce a MAJOR update:
- Add a new function for DIRECT load from PC,of many games/programs and with SUPER FAST speeds (~twice the speed of a disk drive or gotek/hxc emulator!)
- As i ordered bigger batches for pcb's and PICs, now i can offer ready made boards and DIY kits even cheaper!
- Update manual, programs etc.
First i want to thank Docent for his help (http://www.cpcwiki.eu/forum/programming/mc-startboot-program-without-reseting-firmware-jumpblock/msg170920/#msg170920) on developing the code for the direct load function.
The direct load function is actually a major upgrade of the "Cold start" function i developed earlier. With this, you will be able to load or run a program (either BASIC or BINARY) and also many games, directly from the PC! The hole Procedure is rather easy and fast: First, run the windows application and set function to “Direct Load” (com speed will be automatically set to 115200). As with the "cold start" function, a small BASIC program is required to be typed on the CPC, but now it's much smaller:
10 OUT &FBD1,0:OUT &FBD0,0:DI
20 FOR I=0 TO 341
30 POKE &A9B0+I,INP(&FBD0)
40 NEXT i
50 CALL &A9B0
Run the program, and after a couple of seconds, you will get the “Ready” prompt.
From now on, any LOAD” or RUN” command you will give, it will be redirected to PC! Using the button “Direct Load Dir”, you can set the loading directory and have a list of all available files in it:
By setting loading directory to Amstrad Utility Disk folder, you can direct execute utilities WITHOUT needing first to transfer the utility disk image to a real disk (or to a usb stick if you have a gotek/hxc drive)!For example, you can simply give:
RUN”Format.BAS” , in order to format a CPC disk, or
RUN”PC2CPC.BAS”, for transferring files from PC to Amstrad disks
After thorough testing, it is concluded that ~75% of games can be directly executed using this method! You can find many dozens of games that already tested here. (https://www.dropbox.com/sh/hzp3a4b7fktcn8c/AAAj2U8otKw26j-chnd8uUxla?dl=0)
And because this method requires to have files extracted from dsk images, i have also included the “cpc loader” utility, for easily extract multiple dsk images instantly!
For more details you can check User's guide too.
Now, the new function is tested with my CPC 6128, but it would be very interesting to see if it works with the "cassette only" 464, as it would provide a very easy and cheap solution for very fast loading of many games for CPC 464!
Post by: VincentGR on 13:13, 24 February 19
Received my five cards, now it's time to get some CPCs networked! ;D ;D ;D
Thank you very much, the quality is great too! :) :) :)
Waiting for a video with that ;D
Post by: GUNHED on 14:42, 24 February 19
The manual is great, but I want to be sure not to screw things up. From the old days I'm familiar with RS232 / RS485, but this is modern technology...
First question: To connect two CPCs using wires, what do I need to do?
Just connect Tx from the first card with the Rx from the second. And Rx from the first card with Tx from the second. Right?
Post by: Patrick on 14:45, 24 February 19
Post by: ikonsgr on 15:03, 24 February 19
The manual is great, but I want to be sure not to screw things up. From the old days I'm familiar with RS232 / RS485, but this is modern technology...I've updated manual with even more details and information. Now there are BASIC and Assembly code examples for send and receive data and a hole new section describing the usage of the direct load function.
First question: To connect two CPCs using wires, what do I need to do?
Just connect Tx from the first card with the Rx from the second. And Rx from the first card with Tx from the second. Right?
Well,i never tried this, but i believe you will also need the ground pin too (to establish a common ground level for the signals), as in case of direct serial connection of amstrad with CPC using a usb2serial cable adapter. In any case, when you use any kind of direct serial cables, NEVER use the 5v power supply pin, this is only needed for powering the various modules like bluetooth, wifi, usb host etc.
Post by: GUNHED on 15:18, 24 February 19
Well,i never tried this, but i believe you will also need the ground pin too (to establish a common ground level for the signals), as in case of direct serial connection of amstrad with CPC using a usb2serial cable adapter. In any case, when you use any kind of direct serial cables, NEVER use the 5v power supply pin, this is only needed for powering the various modules like bluetooth, wifi, usb host etc.Ok, so I will try this:
GND --- GND
Tx --- Rx
Rx --- Tx
Ordered cables for BT-modules and a BT module, which shall be able to connect to my Laptop which has BT inbuilt. As long I wait for the order to arrive I try that direct connection. :)
Post by: Patrick on 16:12, 24 February 19
Post by: Audronic on 01:24, 25 February 19
Is there a link to the Support files please.
I have not been able to find them.
Thanks. Ray
Post by: ikonsgr on 01:46, 25 February 19
You can find it on the first post of this thread too.
Post by: Audronic on 04:16, 25 February 19
Thanks.
Would it be possible to add that link into the first Message Please. (Perhaps at the bottom of the Page) ? ?
Thanks Ray
Post by: ikonsgr on 11:09, 25 February 19
Post by: Audronic on 11:15, 25 February 19
Ray
Post by: JonB on 09:53, 26 February 19
Post by: ComSoft6128 on 10:01, 26 February 19
As far as I'm aware it is an Amsdos only program at the moment but @ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) will no doubt answer it definitively later.
Cheers,
Peter
Post by: ikonsgr on 18:35, 26 February 19
I'm a bit late to the party on this one, but tell me, is this serial interface also supported by CP/M Plus (6128)?
Unfortunately i don't know much about CP/M so for the moment, there is no CP/M program that supports this interface.
But since usage is pretty easy even with Assembly code, maybe someone might want to develop a utility for CP/M plus too... :)
Post by: JonB on 08:22, 27 February 19
Post by: GUNHED on 21:17, 27 February 19
EDIT: For the actual version, you can use the ConfigOS utility and activate the USIfAC too, so no need for an update. If I manage to release some software it will be fine too (just adding some automatic detection).
Post by: ikonsgr on 00:12, 28 February 19
It's not in need of a specific CP/M utility program, the question is whether or not CP/M supports it already. I consider that very unlikely (it depends on which I/O addresses your interface uses and the UART it uses) but thought I'd ask anyway. Maybe someone has tried it?Well, only 2 addresses used: &FBD0,&FBD1 (although interface answers to the hole range of &FBD0-&FBDF)
This might be useful too: http://www.cpctech.org.uk/docs/iopord.html
Post by: GUNHED on 11:50, 01 March 19
- At CPC-side I connected the USIfAC and to this a Bluetooth module (without button). I used the same module before with the Mini-Booster, so I know the module works.
- From the Disc I started the "Terminal" Application.
- At PC side I did start the "AmstradUtility.exe" application.
- I switched to Wi-Fi. Then clicked at connect.
- The PC / Laptop has an internal Bluetooth module
However I could not get any connection (115.000 baud and also tried 9600 baud, at both sides).
Is there a simple step-by-step idot-proof way to go?
Post by: Audronic on 12:45, 01 March 19
? are WI Fi and Bluetooth different devices ?
Ray
Post by: ikonsgr on 13:14, 01 March 19
Now I guess I need some help. Since I'm not so familiar with Bluetooth.
- At CPC-side I connected the USIfAC and to this a Bluetooth module (without button). I used the same module before with the Mini-Booster, so I know the module works.
- From the Disc I started the "Terminal" Application.
- At PC side I did start the "AmstradUtility.exe" application.
- I switched to Wi-Fi. Then clicked at connect.
- The PC / Laptop has an internal Bluetooth module
However I could not get any connection (115.000 baud and also tried 9600 baud, at both sides).
Is there a simple step-by-step idot-proof way to go?
bluetooth modules are actually serial devices, so you use 'Serial connection' not Wifi.
Also, i note on User's guide, the Tx and Rx signals does not need swap (i have swapped labels for easier connection as some people might not know a swap is needed) , so you should connect pin Tx to Tx and Rx to Rx. :)
About wifi modules, you should first run setwifi.bas in order to setup you wifi module, check user's guide fore more details! And ofcourse you should set Wifi module's ip on windows program too.
If everything works ok, the connection should be established almost imediately after pressing 'Connect' button. If there is a small delay of a few seconds, it means that connection is established but web server on wifi module is not up and running. If there is a longer delay (~20 secs) it means that wifi module is not connected to access point of your router
Post by: ikonsgr on 13:20, 01 March 19
@GUNHED (http://www.cpcwiki.eu/forum/index.php?action=profile;u=2029)
? are WI Fi and Bluetooth different devices ?
Ray
There is absolutely no relationship between bluetooth and wiFi.
Bluetooth is just a wireless point to point serial protocol just like Uart, rs232 etc, only it's wireless.
WiFi is actually a wireless Ethernet protocol, it's like connecting your device using ethernet cable only it's wireless.
Wifi module is something much more complex and 'heavy' than bluetooth so IMO , for direct wireless connections, better option should be bluetooth.
Wifi on the other hand, is useful for other things:
- The abilitiy to create a LAN
- offers a direct connection to internet
Hope this clears things up a bit.
There is also something else about wifi usage,it needs some "packet decoding" at amstrad's side for send or receive, as the data stream is encapsulated with a header, which needs to be removed. For example to send a string using wifi you must first send to serial port the command:
AT+CIPSEND=0,X
where X is the length of the string to be sent. Data string follows imediately after.
serial connections on the other hand, like bluetooth, are straight forward , you just send a byte directly and the other side received it as it is! Thus blutooth is easier to implement and takes less process (and for that it's a bit faster too).
Post by: ikonsgr on 20:47, 01 March 19
So, GUNHED i believe now you can find everything you might need for writing your own utlities/programs/games that will exploit all USIfAC possibilities! ;)
Btw, in the weekend i will start dsk image transfer trials... ::)
Post by: Colday on 21:20, 01 March 19
I've built and connected my board to my 6128 (and a 464 but we will come back to that).
When I run the little basic program for direct load connection all it does is resets the Amstrad. (after a couple of seconds)
Anyone any idea what I'm doing wrong?
I've PM'd Ikon with the same question but thought it may be useful here in case anyone is having similar issues.
464 - Well, it basically did exactly the same, just reset the CPC after running the Direct Loader program.
Ideas anyone?
Post by: ikonsgr on 21:37, 01 March 19
Serial interface works at 0-5v, where 0=low and 5v=high, where serial ports goes from negative 3-25volts for High, to +3-25volts for low!
Fortunately there are ready made RS232 to TTL level converters which are very cheap too:
https://www.ebay.ie/itm/RS232-To-TTL-Converter-Module-COM-Serial-Board-MAX232CSE-Transfer-Chip-atmega16/153166180732?hash=item23a96a717c:g:QEgAAOSw3JRbjjpZ:rk:2:pf:0
This is to use it with a classic DB9 serial port, and this:
https://www.ebay.ie/itm/3X-Mini-RS232-to-TTL-Converter-Module-Board-H1V9/283193772210?hash=item41efaa08b2:g:jKYAAOSwRNhbtbLU:rk:1:pf:0
can be used if you only have a serial port pin header on your PC motherboard.
I believe the above adapters would allow an RS232 serial port to work with USIfAC too.
Post by: Dandare on 23:48, 02 March 19
There is absolutely no relationship between bluetooth and wiFi.I concur... for the most part :D Bluetooth uses some of the radio spectrum of WIFI.
Bluetooth is just a wireless point to point serial protocol just like Uart, rs232 etc, only it's wireless.
WiFi is actually a wireless Ethernet protocol, it's like connecting your device using ethernet cable only it's wireless.
While most of the uController friendly Bluetooth modules do implement the serial profile, Bluetooth Stack is not only serial, it has different profiles. In fact, bluetooth allows for several simultaneous connections and allows different profiles to be used concurrently.
Post by: ikonsgr on 01:13, 03 March 19
While most of the uController friendly Bluetooth modules do implement the serial profile, Bluetooth Stack is not only serial, it has different profiles. In fact, bluetooth allows for several simultaneous connections and allows different profiles to be used concurrently.
Indeed, bluetooth ,although it's a serial point to point protocol, it's also based on master/slave model, so a number of bt slave modules can connect simultaneously to a master bt module, thus you might be able to create a CPC LAN even using BT modules! :)
Still, Bluetooth stack has nothing to do with the much more "heavy" and complicated WiFi's TCP/IP stack (thus WiFi modules use powerful 32bit RISC CPUs) ... ::)
Post by: GUNHED on 20:12, 04 March 19
With the PC program (terminal) I can not enter a single letter, it always makes an acustic warning.
Also with COM 7 at least with the CPC terminal program I can send "Hello" and as response I get "heo" or "elo" back.
The manual ist better, but it lacks step-by-step explanations. Did anybody use a Laptop Bluetooth device for transfer? Or do I need to connect a Bluetooth to the PC via a USB cable?
Post by: ikonsgr on 21:04, 04 March 19
1) If you switch serial port while it is CONNECTED, you have to disconnect serial port by pressing the "CONNECTED" button before make any switches!
2) You are trying to use an RS232 serial port (usually on board serial ports on motherboards). As already mentioned (http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/universal-serial-interface-for-amstrad-cpc/msg171295/#msg171295), the classic RS232 serial ports are NOT combatible as they use completely different voltage levels for "high" and "low" compared to the TTL levels of PIC's UART interface. But fortunately there are very cheap adapters for this too.
3) Ensure that serial speeds are matching! Default serial speed of the Usifac is 115200, so make sure the other side is set to the same speed, or change to the desired speeds using terminal (for the usifac) and port speed drop box on windows program.
Finally i should note that enumaration of serial ports is done once when program started. If you connect a UB2SERIAL cable adapter (or enable a serial port) AFTER you have run the program, it will not be recognized (i might add a "refresh ports" button for this,in order to avoid need for restart program)!
Hope these will help
Post by: ikonsgr on 00:24, 06 March 19
Coming soon to your near USIfAC! :D
Post by: GUNHED on 18:35, 06 March 19
I've just transfer the dsk image of Double dragon 3 to a 3" disk in....40Seconds!
Coming soon to your near USIfAC! :D
Can you please tell us step by step how you did it? So we can reproduce. :)
Post by: ikonsgr on 23:27, 06 March 19
But here is a small preview:
It's a rather simple procedure, you just select the "Image Copy to CPC" function, and using "Select Image" button, you choose the dsk image you want to transfer.
Then, you just run the utility on amstrad CPC, a :"Insert a disk and press any key" message appears,you insert an empty disk, press a key, and after ~40seconds you will have your disk ready!
The program will also notify you what kind of disk format is needed (disks must be either data/system/ibm formatted), you can use the format utility inside Utility disk for this, it's actually really fast too, formating a disk takes ~15 seconds!
Of course since i use AMSDOS routines for the transfer, images with more than 40 tracks or strange sectors (e.g. usually copy protected games), might not be copied to disk correctly. For these, program tries to cut all the non AMSDOS track/sectors (these cannot be written on disk anyway, you get a "Disk error,Ignore or cancel" message on each attempt of writing a "curious" sector) and writes all other. In a couple of cases, an image with 41-42 tracks, copied succesfully to disk, by just discarding the extra tracks, so although it's a "long shot", i decided not to prohibit the transfer of copy protected images but rather leave this option just in case it might work... Still, i will try to develop a way for copying copy protected images, maybe by utilizing this (http://www.cpcwiki.eu/index.php/Programming:Formatting_a_track_on_a_disc) track format routine by thaker, if it can be used for non standard track/sectors of course. The other "solution" might be to edit directly the extended disk parameter block, EDPB, at &A890 but i might need some help on this ::)
Also, i've added a "Rescan" button, for refreshing the available Serial ports without needing to restart the application.
One other thing that worth mentioning, is that the actual transfer speed you get, depends heavily on the layout of sectors in a track.
After copying a few dozens images to disks, i noticed that most of the standard dsk images, have a sector layout on each track that results in requiring ~double the transfer time to disk (~80 seconds). These images have sector id's in series order e.g.: C1, C2, C3... C9 (these are the most common sector id's for DATA format disks).
On the othe hand, most of extended dsk images use a different layout (kind of "interleave" order: C1,C6,C2,C7,C3,C8,C4,C9,C5) that allows the admittedly very fast transfer of ~40seconds/dsk image! So, i manage to rearrange "on the fly" the order of the sectors of a "slow" image, to match this of the "fast" image, and so now, all games can be written fast! :D
Next thing follows, is adding a patched "READ SECTOR" routine for the direct load function! If all goes well, you'll might be able to run CPM games (that needed |CPM to run) and games that used a small "disc" file header without individual files, which currently not supported by the direct load! And the funny thing is that maybe even some copy protected games that can't be transferred to disk , might run directly using this method! :)
Keep in touch!
Post by: ikonsgr on 13:11, 07 March 19
As i believe this would offer much greater convinience, i've decided to postpone a little the presentation of the dsk image transfer, in order to develop this enhancement.
Stay tuned! :)
Post by: Dandare on 13:50, 07 March 19
Check the post here: Re: CPC Dandanator Mini 1.3 - WIP (http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-dandanator-mini-1-0-wip/msg171579/#msg171579)
@ikonsgr, Adapting your current Disk transfer software to run from a dandanator CPC is something we can look into if you want :D
Post by: GUNHED on 15:17, 07 March 19
The next and last attempt will be to connect two interfaces from CPC to CPC directly. Hopefully it will work, just need to get some appropriate wire.
Post by: ikonsgr on 15:40, 07 March 19
Since I had no luck to connect the USIfAC to a Laptop using Bluetooth ..On the other hand, i was able to chat with a lenovo tablet and my old LG smartphone using bluetooth... ;D
In most cases, if you are unable to connect with a device that has a build in bluetooth, this caused by wrong role setting (master/slave) of the bt module on amstrad. Check the bluetooth section on my user guide, to see how you can change that (it's only a single AT command: AT+ROLE=1 or 0...)
my next attempt was to connect the USIfAC to the PC using a cable, which goes into one USB port. The same cable works flawless with the Mini-Booster. The PC software did fix me to COM6, I couldn't change it. The speed was 9600 baud (both of course). I tried the terminal program, no success at all.If we are talking about the usual cheap prolific usb2serial adapter cable, then 100% it should work directly! Did you try my terminal program to see if the port is recognized correctly? In any case this "fix to com6, I couldn't change it" doesn't sound very good... ::)
Post by: ikonsgr on 15:52, 07 March 19
As a related USB project, I just uploaded a demo of the upcoming game transfer by USB on a Dandanator CPC. It loads and run a game from the PC to the real CPC in about 6 seconds.Well that is expected, if i'm not mistaken, the "loading" using Dandanator it's merely a direct memory transfer between your device ram and amstrad's ram (or something like that)... ;D
Check the post here: Re: CPC Dandanator Mini 1.3 - WIP (http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/cpc-dandanator-mini-1-0-wip/msg171579/#msg171579)
If i may ask, is dandanator a DIY free project? And what is the actual cost of making one or having one from you?
I believe these are critical factors for a project to be REALLY useful and widely accepted,don't you think?
@ikonsgr, Adapting your current Disk transfer software to run from a dandanator CPC is something we can look into if you want :DWell, all source code and binaries are given freely (check 1st post on this thread) for anyone who wants to modify,edit, change etc, to make their own applications. If there is anything else you might want to know fell free to ask! :)
Post by: GUNHED on 16:06, 07 March 19
In most cases, if you are unable to connect with a device that has a build in bluetooth, this caused by wrong role setting (master/slave) of the bt module on amstrad. Check the bluetooth section on my user guide, to see how you can change that (it's only a single AT command: AT+ROLE=1 or 0...)
Would be nice if you could put this in your software, I didn't know about it. Also I don't know how to find the CPCs Bluetooth-Module. But I do find the one of the Mini-Booster. I nevertheless take a break, it's quit frustrating.
Post by: ikonsgr on 16:11, 07 March 19
There you can find a recomendation of what BT modules to use, and where to find/buy them ,along wiith photos, and a step by step precedure (like you wanted :) ),to configure the modules!
Post by: Dandare on 16:15, 07 March 19
Well that is expected, the "loading" using Dandanator it's merely a direct memory transfer between your device ram and amstrad's ram... ;D
If i may ask, is dandanator a DIY free project? And what is the actual cost of making one or having one from you?
I believe these are critical factors for a project to be REALLY useful and widely accepted,don't you think?
Well, all source code and binaries are given freely (check 1st post on this thread) for anyone who wants to modify,edit, change etc, to make their own applications. If there is anything else you might want to know fell free to ask! :)
The CPC Dandanator has no ram :) , so what you have seen is quite tricky. The game loads from the PC via USB to the CPC Ram directly by means of hardware hacking an opcode. When activated, LD A,(HL) does not loads a with the content of the address pointed by HL, but returns the bit of the serial port. Then a Z80 asm bitbanging at 115.200bps does the rest. When loading a game you have to restore the registers, CRTC, GA.... so that has to be done as well.
CPC Dandanator is public domain since its first appearance on September last year. It's a brother project of the ZX Dandanator, launched in 2016. There are 382 cartridges on the field right now (ZX Dandanator numbers are way over 2.000 units).
BOM for materials is around 8€ without the plastic case. All information is in www.dandare.es (http://www.dandare.es).
I'd check your code in the first post, thanks.
Edit: I did post the source code for the ZX Dandanator PIC, the VHDL Source Code for the CPC Dandanator CPLD, Z80 source code for ZX (CPC coming when cleaned ;) and all the sources of the Java tool in GitHub. Are you planning to post your source code? Thanks.
For what I've seen there is a list of games you support. Is this a manual process?. I'm approaching this by Snapshots, so any game snapshot, CDT or DSK-"beta" (I have an embedded CPC emulator in the Java Tool) with no modification is supported (I'm quite positive some of them may fail in this v1, though)
Also, you may want to consider integrating the USB to TTL in your pcb as I did with the CPC Dandanator, so you just plug a cable between the PC and the board. I used an external USB-TTL adapter for the ZX Dandanator but, in my opinion, having the USB connector in the cartridge is a much better user experience and cost is not to high.
Post by: ikonsgr on 16:37, 07 March 19
But if i may say, Usifac has nothing to do with dandanator, as it's not just a "loading device" for amstrad (this is just one of the possible usages) , but rather it's a very cheap (either to buy or make yourself) serial interface implemented with a PIC mcu, which means that usage could be VERY versatile, it can be used to connect and communicate with anything with a UART serial interface, from direct serial cables ,bluetooth modules, wifi modules even usb host adapters and who know what else! ;)
Post by: Dandare on 16:42, 07 March 19
That sounds really hard thing to do, indeed. It's definetely a good alternative for fast and easy loading on spectrum zx and amstrad cpc 464 users.
But if i may say, Usifac has nothing to do with dandanator, as it's not just a "loading device" for amstrad (this is just one of the possible usages) , but rather it's a very cheap (either to buy or make yourself) serial interface implemented with a PIC mcu, which means that usage could be VERY versatile, it can be used to connect and communicate with anything with a UART serial interface, from direct serial cables ,bluetooth modules, wifi modules even usb host adapters and who know what else! ;)
Absolutely, I just linked here the USB load since both projects kind of share that aspect. Dandanator is a game cartridge (both CPC464 and 6128, and the likes.. 664, KC Compact, Plus series..) that happens to have a USB. Yours is a SERIAL interface (and much better at that, of course) for CPC, I get it :D .
Post by: ikonsgr on 20:31, 07 March 19
BOM for materials is around 8€ without the plastic case. All information is in www.dandare.es (http://www.dandare.es).That's really cheap indeed. Having said that, i'd like to note some things concerning the "DIY aspect" of various hardware projects:
- A major "problem" is the PCB board, as even if you share the gerber files, i doubt someone would order the minimum of 5pcbs batch to a chinese PCB maker ,to make just one board, unless it can make the pcb by himself, which i believe, it's NOT the case for the vast majority of amstrad users! :)
- Another matter for a potential DIY, is the need for programming/flashing of CPLD's, MCU's, EEPROM's etc which usually require extra hardware/software.
- The level of complexity of the circuit itself might be a major factor, as larger boards with a lot of components (especially if there are SMD's), might require greater soldering skills and equipment
All the above greatly influence the REAL potential for DIY, regardless of the cost. So, my first priority when i started the design of the serial interface, was to make it as cheap, as simple and as easy to make/use as it can be! That way, the... "hardware aspect" of the project, was minimized to a minature pcb of ~5X3cm with very few components, and all the potential usage is made by software! ;)
Edit: I did post the source code for the ZX Dandanator PIC, the VHDL Source Code for the CPC Dandanator CPLD, Z80 source code for ZX (CPC coming when cleaned ;) and all the sources of the Java tool in GitHub. Are you planning to post your source code? Thanks.That's really an admirable job you did, perhaps compared only with "M4", the other "super board" made by duke, really much more adavance projects than my serial interface... ::)
For what I've seen there is a list of games you support. Is this a manual process?. I'm approaching this by Snapshots, so any game snapshot, CDT or DSK-"beta" (I have an embedded CPC emulator in the Java Tool) with no modification is supported (I'm quite positive some of them may fail in this v1, though)
In 2 words, in my case everything is made by software. I just patched the firmware loading routines thus all "RUN" and "LOAD" commands referred to a directory in your pc.
You can see all the details about the "direct load" project that utlizes the serial interface (along with a lot of Z80 asm code), here (http://www.cpcwiki.eu/forum/programming/mc-startboot-program-without-reseting-firmware-jumpblock/).
Also, you may want to consider integrating the USB to TTL in your pcb as I did with the CPC Dandanator, so you just plug a cable between the PC and the board. I used an external USB-TTL adapter for the ZX Dandanator but, in my opinion, having the USB connector in the cartridge is a much better user experience and cost is not to high.
Well,as i previously said, i'd like to keep the hardware apsect of the project as cheap and easy to make as it can be, and since usb2serial cable adapters, bluetooth modules and wifi modules are very cheap and easy to obtain,i considered better let the potential user to choose! ;)
Post by: 00WReX on 09:40, 09 March 19
Anyway, feeling like this would all be very straight forward as I have played around with this type of thing on many occasions...I hit a very unexpected roadblock.
So, my problem is I cannot get the Windows utility to recognise a COM port ???
I have multiple USB to serial devices, with the FTDI chipset being the main ones I use (for re-flashing GOTEK software amongst other things).
I even have one like the one pictured in the user guide, I usually use that on the Atri XL's for a SIO2PC solution, so I know they all work.
I Tried different ports, different USB to serial devices, rebooted the computer...nothing.
I always plug the USB to serial device in before starting the software so that the port gets allocated first...but absolutely no joy.
Attached is a screenshot of my PC (Windows 7).
Post by: ComSoft6128 on 10:15, 09 March 19
Post by: 00WReX on 13:21, 09 March 19
I have an old laptop running Windows XP, so with nothing to lose I tried that.
Well, as far as serial port connection goes (via the windows utility program) it connected...
It immediately had the COM port in the 'Port' drop down window and connected as soon as I pressed the 'Disconnected' button.
My Windows 7 laptop never sees a port in the drop down window.
But that is about as much success as I have had.
I thought I would have a go at the direct load function using the simple 'type-in' provided in the manual.
But the CPC just locks up.
I had the USB to Serial adapter going the the CPC adapter in the rx to tx and tx to rx configuration as you would expect.
If I do reverse these, and run the same 'type-in', then I actually get a 'Serial error' message from the Windows utility...so there is something going on between them.
I'm using a 464, so unsure if things have been tested on this model.
Post by: 00WReX on 14:12, 09 March 19
Quote
I had the USB to Serial adapter going the the CPC adapter in the rx to tx and tx to rx configuration as you would expect.
If I do reverse these, and run the same 'type-in', then I actually get a 'Serial error' message from the Windows utility...so there is something going on between them.
With the connections going from tx to tx and rx to rx the 'Terminal' program works ???
Typing on the windows PC appears on the CPC and vice versa.
But the 'direct load' function does not work and causes the 'serial error' as previously mentioned.
OK, that's it for tonight...
Post by: ikonsgr on 12:00, 12 March 19
I've made some changes to the code, and now it should work ok (i already test it on a windows 7/32bit and worked fine, previous version returned no com ports), so try this (https://www.dropbox.com/s/6oe3yr2g3so7egc/AmstradUtility.zip?dl=0) and tell me if it works.
Btw, this has the dsk transfer function too enabled, it's still in beta testing but i beleive soon it will be available :D
p.s. Onboard serial ports on old laptops does NOT work directly as explained eralier (http://www.cpcwiki.eu/forum/amstrad-cpc-hardware/universal-serial-interface-for-amstrad-cpc/msg171295/#msg171295) (also none of these old ports seem to support speeds greater than 115200)
Post by: ComSoft6128 on 12:22, 12 March 19
I will try it out this weekend.
Post by: GUNHED on 17:51, 12 March 19
Tx --- Rx
Rx --- Tx
GND - GND
Next step: Make a CPC network out of them.
Post by: ikonsgr on 23:22, 12 March 19
For Amstrad LAN, you should use wifi modules, and better try it first using a router as access point (where all wifi modules should connect to), and if all goes well, then you could try to use one of wifi modules as access point to create a completely "Amstrad only" lan network!
I'm still waiting for a couple of wifi modules i've ordered to make some tests my self... ::)
Post by: GUNHED on 23:47, 12 March 19
In case I enter in one of the terminal windows: AT+ROLE=1 nothing happens. I do a reset of the CPC and start terminal again. Nothing happens. Sorry, I still seem to forget something.
Maybe it's because they are both HC-06?
Post by: ikonsgr on 23:55, 12 March 19
Post by: GUNHED on 00:00, 13 March 19
Post by: ikonsgr on 00:03, 13 March 19
Post by: GUNHED on 00:04, 13 March 19
Post by: ikonsgr on 17:36, 23 March 19
- Finally,a dsk image function is added to the utility program! It supports data/system format images and with quite fast speeds: ~55seconds to write a 180kb dsk image to an unformmated disk, or ~40seconds to an already amstrad formatted disk (@460800bps)!
- MAJOR update of user guide: new sections with detailed instructions and help photos for each function were added, along with an active table of contents for easy guide, as manual has become 20+pages!
- Add an extra button <Caps Lock> on Amstrad CPC2PC program,to select/unselect all the files at once! This is useful, if you want to transfer all files of the disk, or if you want to “invert” the already selected files (e.g. all selected files will be unselected, and all other, will be selected).
- Fix a bug which prevented the enumeration of serial ports in Windows vista/7 32bit
- Added a "rescan" button for rescanning serial ports after application is started (in order to avoid close/reopen of application for serial port acknowledge)
Post by: ikonsgr on 15:49, 24 March 19
https://www.dropbox.com/sh/hzp3a4b7fktcn8c/AAAj2U8otKw26j-chnd8uUxla?dl=0
Post by: GUNHED on 18:25, 11 April 19
Post by: LambdaMikel on 17:34, 12 April 19
Any somebody please try the MP3 module test with USIfAC as well (if nobody volounteers, I will try at some point). It worked well with LambdaSpeak 3's serial port.
Post by: GUNHED on 17:43, 15 April 19
Post by: LambdaMikel on 18:55, 15 April 19
You could connect to LS3 serial port? Did you use 8N1?
Yes, 9600 8N1. You can see how to send play / volume / stop commands in the video I posted.
I can also share the DSK.
ACtually, the latest LS30.DSK should already have "mp3.bas". I guess it should be easy to adjust for USIfAC.
Post by: LambdaMikel on 19:05, 15 April 19
EDIT: note that you only need to send ONE 255... it just because 255 needs to be escaped in LambdaSpeak serial interface.
Post by: ikonsgr on 13:40, 22 April 19
Just a question for completeness. The USIfAC I guess works with 8N1. Is it possible to change, Parity, Bits/Byte, Stop-Bits ... ?These are not supported by the hardware serial interface on PIC 16F1579.
Post by: LambdaMikel on 17:17, 22 April 19
These are not supported by the hardware serial interface on PIC 16F1579.I guess these modi are mostly for exotic and devices of historical interest anyhow... never had anything else than 8N1 anyhow. @GUNHED (http://www.cpcwiki.eu/forum/index.php?action=profile;u=2029) do you know of any devive that's not using 8N1?
Post by: Dandare on 02:03, 23 April 19
Including a second stop bit or even half a stop bit for 1,5 standard value could potentially be done by a timer or delay after the TXIF is set, using the idle status of the line as a stop bit. This is, however, a bit of a stretch of the EUSART.
So, potentially this is what the PIC could do, Note that sometimes the stop bit is done by the hw peripheral itself and sometimes by means of said delay.
9,N,x
8,(Even/Odd),x
But... at the end of the day, almost everything is 8,N,1. :)
Post by: GUNHED on 02:59, 25 April 19
Post by: 260Z on 13:51, 27 May 19
Will send a PM
Cheers,
Rob
Post by: Fabrizio Radica on 23:10, 10 June 19
I've recently bought this module on ebay :)
Can i connect, and use (fm player?), this FM Module on CPC? i've already use it on C64.
https://www.youtube.com/watch?v=FUan3vibg18 (https://www.youtube.com/watch?v=FUan3vibg18)
Ciao!
Post by: LambdaMikel on 00:10, 11 June 19
You could use it with LambdaSpeak 3 instead of RTC board ;)
This one might do for UART / USIFAC:
https://www.amazon.com/UTP-87-108MHZ-Receiver-Wireless-Microphone/dp/B07FKRML7B/ref=sr_1_6?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-6 (https://www.amazon.com/UTP-87-108MHZ-Receiver-Wireless-Microphone/dp/B07FKRML7B/ref=sr_1_6?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-6)
Or this one:
https://www.amazon.com/UTP-87-108MHz-Wireless-Microphone-Receiver/dp/B07FKR5GYD/ref=sr_1_20?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-20 (https://www.amazon.com/UTP-87-108MHz-Wireless-Microphone-Receiver/dp/B07FKR5GYD/ref=sr_1_20?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-20)
Post by: Fabrizio Radica on 14:23, 11 June 19
Unlikely. That's I2C, not serial / UART.oh.. can i use USIFAC + LambdaSpeak 3 + Mp3 module?
You could use it with LambdaSpeak 3 instead of RTC board ;)
This one might do for UART / USIFAC:
https://www.amazon.com/UTP-87-108MHZ-Receiver-Wireless-Microphone/dp/B07FKRML7B/ref=sr_1_6?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-6 (https://www.amazon.com/UTP-87-108MHZ-Receiver-Wireless-Microphone/dp/B07FKRML7B/ref=sr_1_6?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-6)
Or this one:
https://www.amazon.com/UTP-87-108MHz-Wireless-Microphone-Receiver/dp/B07FKR5GYD/ref=sr_1_20?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-20 (https://www.amazon.com/UTP-87-108MHz-Wireless-Microphone-Receiver/dp/B07FKR5GYD/ref=sr_1_20?keywords=stereo+radio+module&qid=1560200987&s=toys-and-games&sr=1-20)
if yes.. i would like to buy LS3, now (how much costs?) :)
Sounds great for my LocomotiveBasic Games like this.
https://www.youtube.com/watch?v=qhCgyKwt6JQ (https://www.youtube.com/watch?v=qhCgyKwt6JQ)
Post by: GUNHED on 14:51, 11 June 19
oh.. can i use USIFAC + LambdaSpeak 3 + Mp3 module?Well, here I run a CPC 6128 with USIfAC and LambdaSpeak III very well. :)
if yes.. i would like to buy LS3, now (how much costs?) :)
Post by: LambdaMikel on 20:29, 11 June 19
The prices for LS 3 vary depending on what you want to get - it is configurable. The prices have been posted in the LS 3 thread, please have a look there.
Cheers
Michael
Post by: 260Z on 13:20, 14 June 19
Received my Serial Interface today , and I'm absolutely loving it. Fantastic piece of hardware.
Before I discuss a couple of quirks , I'll fully disclose the setup I'm running , just in case it's somehow relevant. Plus anyone else running this setup, or similar, should be confident that this will run on their system.
464 -> MotherX4 Board + @revaldinho (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1776) memory expansion 512kb + USIFAC -> Rombo Redux Deluxe board ( numerous roms ) -> DDi-1 with Parados Rom -> x2 FD-1 Drives
Firstly , Direct Load and PC2CPC works perfectly. But the Dsk2Disk utility , I'm assuming this has been programmed for Basic 1.1??? . As line 1015 CLEAR INPUT , upset my lowly 464...lol. All good though as I simply deleted this line and it appeared to function perfectly.
Edit : Just realised the impact of removing CLEAR INPUT. Will look into the 1.0 equivalent.
Secondly , but much more sadly :( , the windows application refused to recognise the R-Type 128k DSK , saying it wasn't AMSDOS compatible. This is only an assumption , as I don't know for certain , but I'm assuming that R-Type is designed for Parados Formats ?? . If this is the case , is it possible to have support for Parados Formatted disks included ??
The final point is trivial really , as I could probably program this myself into the BAS flle , but an option to select the destination drive ( A or B ) in DSK2DISK and PC2CPC would be nice :)
But otherwise I'm loving what you've done here @ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) . I can write files directly to my disk drives from my PC :D
Between you, @revaldinho (http://www.cpcwiki.eu/forum/index.php?action=profile;u=1776) and @The Equalizor (http://www.cpcwiki.eu/forum/index.php?action=profile;u=2279) its been a good couple of weeks ;D
Cheers,
Rob
Post by: ikonsgr on 20:43, 21 June 19
About the "clear input" problem you mentioned, try it to replace it with: CALL &BB03 ,this is the reset keyboard routine that also flushes keybaord buffer (maybe i'll include it in the assembly program so there will be no need for this in BASIC program at all).
About rtype 128, i checked it, and it seems that the 3" version (which contains two dsk images of 180k) contains some tracks with 10sectors which is why you get the "non amsdos" error (normal tracks have 9 sectors).
BUT, i've already developed a more versatile version of dsk2disk, which supports many non standard images with variable sectors/track, variable gap#3 length, variable sector sizes, and even more than 40 tracks!. With that, you will be able to write almost all dsk images, except some copy protected games with strange "weak sectors" locks, but fortunately i think all of these games can be found in unprotected dsk versions too! ;) (btw i've just used this new version to transfer the rtype 128 to a 3.5" disk and worked perfect! ;D )
I'm also in a process of completely redesigning the Wifi functionality in order to avoid the need of giving AT commands all the time, and instead, have a direct WiFi communication like in serial/bluetooth mode (passthrough mode/transparent transmission). Unfortunately this requires a completely different connection model ,where TCP server will be on the PC and wifi module will be connected to it (the opposite of how is currently working), so it might need some time to finish it.
Post by: 260Z on 02:42, 22 June 19
......
BUT, i've already developed a more versatile version of dsk2disk, which supports many non standard images with variable sectors/track, variable gap#3 length, variable sector sizes, and even more than 40 tracks!. With that, you will be able to write almost all dsk images, except some copy protected games with strange "weak sectors" locks, but fortunately i think all of these games can be found in unprotected dsk versions too! ;) (btw i've just used this new version to transfer the rtype 128 to a 3.5" disk and worked perfect! ;D )
....
You're a bloody legend mate.... ;D
Just having my morning coffee, thinking about what I'll be doing with my day..... Giving this a test run is number one on my list now :D
Edit : I see the new version isn't uploaded yet, all good :)
Cheers,
Rob
Post by: chrisgreen on 13:15, 29 June 19
Looking forward to having a good play with them over the weekend and getting my machines talking to each other, as well as to my PC.
Post by: LambdaMikel on 17:18, 03 July 19
I had ordered 2 FM modules a while ago but there are still on the ship from China.
Post by: ikonsgr on 13:47, 04 July 19
- Complete redesign of the WiFi functionality! Now PC program runs the TCP server,enabling a direct passthrough communication which makes Wifi usage much more stable and easy to implement.
- ALL functions (except direct load) can now be used with WiFi modules too! (previous version didn't support dsk image transfer with wifi modules and CPC to PC file transfer was a bit buggy too)
- Image transfer utility now supports many "non standard" images, with variable sectors/tracks, variable gap#3 length, variable sector sizes!
- Add a new small program (setservr) for easily configure WiFi module to act as TCP server, for creating Amstrad CPC WAN/LAN networks!
- Added ~20 new games (115 games in total), in the certified "direct load (https://www.dropbox.com/sh/hzp3a4b7fktcn8c/AAAj2U8otKw26j-chnd8uUxla?dl=0)" game list.
- Update of the user's manual, add much more detail infomration on configure and usage of WiFi modules!
You can find all updates here (https://www.dropbox.com/s/0z2cpcbxvl95s9v/Amstrad%20CPC%20serial%20interface.zip?dl=0) (or in the same link on the first page)
Post by: 260Z on 03:49, 05 July 19
The demo also works flawlessly, on floppy disc, from beginning to end. Very pleased.
EDIT : Excluding that final clown image, that upsets my vga converter.
Keep up the good work :D
Cheers,
Rob
Post by: Fabrizio Radica on 15:22, 05 July 19
Anybody tried any UART modules with USIFAC by now, such as Catalex MP3 player, or FM Radio module, or MIDI UART board?mmh... i'm really interested in MIDI UART Board...
I had ordered 2 FM modules a while ago but there are still on the ship from China.
post news when you had received (and use) it :)
I've USIfAC but i don't know how use it pratically.
Post by: ikonsgr on 19:27, 05 July 19
mmh... i'm really interested in MIDI UART Board...
post news when you had received (and use) it :)
I've USIfAC but i don't know how use it pratically.
I think this (https://www.dropbox.com/s/xg85264klwixksr/Amstrad%20CPC%20Serial%20Interface%20User%20Guide.pdf?dl=0) might help! ;)
Post by: LambdaMikel on 19:51, 05 July 19
I think this (https://www.dropbox.com/s/xg85264klwixksr/Amstrad%20CPC%20Serial%20Interface%20User%20Guide.pdf?dl=0) might help! ;)
@ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) unless you add the MIDI BAUD rate 31250 to the firmware, it won't do MIDI.
I just figured that out with LambdaSpeak 3 Serial Interface - had to change the firmware to support 31250 for that.
I guess the PIC can do 31250?
THat might be helpful to figure out the settings for UART config registers:
http://www.barrysoft.it/blog/midi-with-pic-ausart.html (http://www.barrysoft.it/blog/midi-with-pic-ausart.html)
Post by: ikonsgr on 19:55, 05 July 19
@ikonsgr (http://www.cpcwiki.eu/forum/index.php?action=profile;u=541) unless you add the MIDI BAUD rate 31250 to the firmware, it won't do MIDI.
I just figured that out with LambdaSpeak 3 Serial Interface - had to change the firmware to support 31250 for that.
I guess the PIC can do 31250?
Never tried that specific baud rate, but most probable it can. It's very easy to add this speed to the code and selecting it ,by a simple, let's say: OUT &FBD1,20
Of course, you will need to reflash the pic with the new program.
Post by: LambdaMikel on 19:58, 05 July 19
Never tried that specific baud rate, but most probable it can. It's very easy to add this speed to the code and selecting it ,by a simple, let's say: OUT &FBD1,20
Of course, you will need to reflash the pic with the new program.
That means the MIDI BAUD rate is already supported by USIFAC? Then it should work out of the box!
EDIT: oh, OK, I need to reflash it... I see.
I guess I was suggesting for you to change the firmware such that customers can use MIDI BAUD rate out of the box. ;) Just an idea, you are welcome ;D
Post by: ikonsgr on 20:03, 05 July 19
Of course i can (i have already 10 different speeds supported, where you can select them "on the fly" by giving simple OUT &FBD1,x commands), but for all of you who have already a usifac, you will need to re-program the pic (or send you another PIC with the new program ::) )
That means the MIDI BAUD rate is already supported by USIFAC? Then it should work out of the box!
EDIT: oh, OK, I need to reflash it... I see.
I guess I was suggesting for you to change the firmware such that customers can use MIDI BAUD rate out of the box. ;)
Post by: LambdaMikel on 20:04, 05 July 19
Of course i can (i have already 10 different speeds supported, where you can select them "on the fly" by giving simple OUT &FBD1,x commands), but for all of you who have already a usifac, you will need to re-program the pic (or send you another PIC with the new program ::) )
I understand that. I was just bringing to your attention that you need the baud rate 31250 for MIDI to work; I saw in the USIFAC manual and menus that it is not there yet. I didn't know that until I tried that with LS 3 serial interface, so I wanted to share that information with you such that you can provide a more useful product to customers.
AGain, you are welcome!
No need for a new PIC for my 2, I can do it myself. Thanks for offering to send new PICs.
Post by: ikonsgr on 20:36, 05 July 19
You want me to send you the new hex and give it a try? ;D
Post by: LambdaMikel on 20:45, 05 July 19
Done! The speed of 31250 can be selected by giving a simple OUT &FBD1,20
You want me to send you the new hex and give it a try? ;D
Sure! Thank you, super fast service!
Post by: ikonsgr on 20:57, 05 July 19
Sure! Thank you, super fast service!
Here (https://www.dropbox.com/s/ui9xyd80s8mr4w5/pic16f1579.hex?dl=0) it is.
From now on, i will flash all new boards with this version, and i'll upload the hex file to the "official" link too! ;)
Post by: ikonsgr on 21:05, 05 July 19
Btw,i just noticed that 31250 is a speed that uart interface can match EXACTLY, all other speeds are having some small errors (usually less than 1%)in actual speed, maybe that's why it's selected for the MIDI in order to have absolute synchronization? ::)
Post by: ikonsgr on 13:30, 06 July 19
http://www.hobbytronics.co.uk/usb-host-midi
Post by: LambdaMikel on 04:55, 08 July 19
USB MIDI is cool, but most of my synths are old style and have MIDI DIN (I have a USB -> DIN MIDI converter box though).
So I like this one, which is as minimal as it gets:
https://ubld.it/products/midi-breakout-board/ (https://ubld.it/products/midi-breakout-board/Unfortunately)
Unfortunately, it is no longer available on Amazon, but you can get it here:
https://www.tindie.com/products/ubldit/midi-breakout-board/?_ga=2.246732166.343271136.1562550881-1119099813.1562130274 (https://www.tindie.com/products/ubldit/midi-breakout-board/?_ga=2.246732166.343271136.1562550881-1119099813.1562130274)
I mean, the Arduino MIDI shields also work, but they are too bulky really.
Post by: GUNHED on 23:47, 08 July 19
Btw, anyone with another "special speed" request? I can add as many custom speeds as you like! :)
Great for future developments. :) :) :)
Post by: ikonsgr on 10:52, 09 July 19
Thanks for the link!
USB MIDI is cool, but most of my synths are old style and have MIDI DIN (I have a USB -> DIN MIDI converter box though).
So I like this one, which is as minimal as it gets:
https://ubld.it/products/midi-breakout-board/ (https://ubld.it/products/midi-breakout-board/Unfortunately)
Unfortunately, it is no longer available on Amazon, but you can get it here:
https://www.tindie.com/products/ubldit/midi-breakout-board/?_ga=2.246732166.343271136.1562550881-1119099813.1562130274 (https://www.tindie.com/products/ubldit/midi-breakout-board/?_ga=2.246732166.343271136.1562550881-1119099813.1562130274)
I mean, the Arduino MIDI shields also work, but they are too bulky really.
That's very nice! So,by getting this MIdi adapter and connect it to usifac, you will be able to use amstrad with a synthesizer, right?
Of course you will need some software too for this,in the end everything goes down to send and receive bytes, which can be very easily done (either in BASIC or assembly) with simple inp and out commands, you think you will be able to develop the program for this?
Post by: LambdaMikel on 18:31, 10 July 19
But I am afraid I'll try it on LambdaSpeak 3 Serial Interface first; when that works well, I'll port the MIDI CPC software to USIfAC, but that is the plan, yes!
Post by: ikonsgr on 18:58, 13 July 19
I've just upload a variant of the classic pong game (along with ~dozen of more games, tested with direct load, 130+ games in total), which utilizes the serial interface!
I've named it "pong-lan" and it's a 2 player game, only that... each player is playing in its own amstrad cpc!
It's a simple basic game which you can find here (https://www.dropbox.com/sh/rdn25eso1inx6i5/AAA1rTMtlXnvTtVuYj5KrDcaa?dl=0), you can run/load it directly using the direct load function. Note that using Wifi modules, it's possible to play it through internet, and with a couple of modifications i even tried it with... an "old friend", a Commodore 64!!! (https://www.youtube.com/watch?v=l9rWsShqKsE) :o
Maybe the first network inter-8bit-computer game??? :D
Post by: LambdaMikel on 09:52, 14 July 19
Post by: biishop on 21:21, 30 July 19
The operation is very simple and very reliable. Replicating DSK files on physical media is pure bliss with the USIfAC.
I sincerely thank Ikonsgr for this achievement and the sharing he makes of this creation and the way to makes it accessible.
It's a MUST HAVE absolutely.
Post by: ikonsgr on 12:03, 31 July 19
Btw, today we reached 50 boards sold (42 assembled boards and 8 DIY kits), to ~40 different people!
Post by: ikonsgr on 15:05, 02 August 19
You can also find a small presentation on youtube here (https://www.youtube.com/watch?v=oImOI_TJhDo)
Post by: ikonsgr on 19:36, 03 August 19
Post by: LambdaMikel on 20:02, 21 August 19
Here (https://www.dropbox.com/s/ui9xyd80s8mr4w5/pic16f1579.hex?dl=0) it is.
From now on, i will flash all new boards with this version, and i'll upload the hex file to the "official" link too! ;)
Thanks for the firmware update! I just reprogrammed my USIfACs with this new firmware. So this should have the 31.250 BAUDs required for MIDI, right?
Finally found the time to do something with USIfAC and successfully transmitted 2 games. Using a standard USB FTDI cable - it works great!
Now, I am in a position to start working on the MIDI IN experiment. I have the MIDI IN code working with LambdaSpeak 3 Serial Interface (see Polyphonous MIDI IN CPC Synthesizer Video there), and will try to get that code running with USIfAC.
The only concern I have is that the USB port is actually (attempting to) powering the whole CPC... so I need to make sure to first turn on the CPC before plugging in the FTDI USB cable. Of course the USB cannot provide enough power, but it is enough for the Power LED to go on and the CPC trying to boot...
Post by: LambdaMikel on 08:24, 22 August 19
Post by: LambdaMikel on 08:29, 22 August 19
Post by: ikonsgr on 15:34, 23 August 19
As far as i know, this must be the first application of the Usifac,apart from the utilites i have made!
And LambdaMikel,i suppose it wasn't hard to make it work with USIfAC right? ;)
Btw, i wonder ,what would be the practical usage of such "marriage"? Writing music using a keyboard synthsizer that could be saved in amstrad and then maybe replayed?
The only concern I have is that the USB port is actually (attempting to) powering the whole CPC... so I need to make sure to first turn on the CPC before plugging in the FTDI USB cable. Of course the USB cannot provide enough power, but it is enough for the Power LED to go on and the CPC trying to boot...
Hmmm, maybe if you don't use the 5v pin from Usifac ,the problem will be solved (this is how a usb2serial cable adpater works too,there is no need to connect the 5v pin,i note this in manual too). Unless the small board with the midi connector needs to power from serial interface
Post by: LambdaMikel on 17:14, 23 August 19
So it seems that USIfAC really works as MIDI "bridge" between a synthesizer and an Amstrad CPC!Yes, it was very easy to use and "program" USIfAC, thanks tou your excellent manual!
As far as i know, this must be the first application of the Usifac,apart from the utilites i have made!
And LambdaMikel,i suppose it wasn't hard to make it work with USIfAC right? ;)
Btw, i wonder ,what would be the practical usage of such "marriage"? Writing music using a keyboard synthsizer that could be saved in amstrad and then maybe replayed?
Hmmm, maybe if you don't use the 5v pin from Usifac ,the problem will be solved (this is how a usb2serial cable adpater works too,there is no need to connect the 5v pin,i note this in manual too). Unless the small board with the midi connector needs to power from serial interface
Understanding the MIDI protocol good enough was the most challenging part, but I had already gone through this with the previous version of this project.
Right, the "power problem" does not appear with the MIDI board, only with the USB cable connection to the PC. Providing VCC from another source or may only connecting GND might solve the problem. Will try. It is not a big problem anyhow, just something to remember - turn on the CPC first, then plug in the USB FTDI cable.
Well, "practical and 8bit computers" is a bit of an oxymoron these days anyhown IMHO ;) , but yes, it could go into that direction. How about adding a CPC to your rack of MIDI synthesizers - imagine something like this + a CPC :D
https://upload.wikimedia.org/wikipedia/commons/0/0a/Synth_rack_%40_Choking_Sun_Studio.jpg (https://upload.wikimedia.org/wikipedia/commons/0/0a/Synth_rack_%40_Choking_Sun_Studio.jpg)
I mean, there are people using the C64 + DualSid etc. with MIDI IN as a synthesizer... why not do the same with a CPC and maybe PlayCity and LS3. Obviously, a capable MIDI CPC Synthesizer program needs to be written or adapted first. Maybe I'll work a bit on this by extending what I already have.
Post by: GUNHED on 17:31, 23 August 19
Post by: ikonsgr on 22:20, 31 August 19
Post by: Targhan on 12:29, 18 October 19
As I always do, I plugged everything without reading the manual (because I think I'm sooooo clever), and plugged the 4 pins of the USB adapter, INCLUDING the +5V, which, I learned later, must NOT be plugged.
I first started playing with hardware in Basic, reading the control port and receiving only 255, meaning that a byte was available (and the byte is always 255).
Then I read the manual, disconnected the +5V, but the result was the same.
The reset and pause buttons work fine, so I guess the hardware is not so fried??
Also, Windows 10 recognize the COM port, but names it "PL2303HXA PHASED OUT SINCE 2012, PLEASE CONTACT YOUR SUPPLIER."!
The COM port is in the dropdown box of the Windows software provided with the USIfAC, but when clicking on "connect", a pop-up shown with the message "Serial interface exception".
Am I doomed to order a new hardware?
Post by: Targhan on 12:41, 18 October 19
I switched to another USB port, and it worked right away, W10 detected a "Prolific USB-to-Serial Comm port" and it worked great!
But then, I unplugged the USB port, plugged it on another USB port, and now the driver is always "PL2303HXA PHASED OUT SINCE 2012. PLEASE CONTACT YOU SUPPLIER.", even when I switch to the USB port that was working previously.
I'll try to find a driver somewhere... unless someone here has a solution.
Post by: Targhan on 13:00, 18 October 19
I made a search and downloaded drivers from here (http://www.prolific.com.tw/US/ShowProduct.aspx?p_id=225&pcid=41), but it doesn't change anything. Anyone with the same problem as I?
Post by: Targhan on 13:12, 18 October 19
Post by: Bryce on 13:24, 18 October 19
Bryce.
Post by: Targhan on 18:03, 18 October 19
Post by: LambdaMikel on 19:00, 18 October 19
Post by: pelrun on 03:35, 20 October 19
Post by: HAL 6128 on 10:51, 20 October 19
With W10, it really depends on the quality of the FTDI cable... super cheap is usually crap. I have three or four of these, and only two of them really work reliably. The good ones need no driver at all - or for whatever reason, my Windows already knew them ;D...yeah, I had the same experiences...
Post by: Targhan on 14:44, 20 October 19
Post by: TotO on 18:46, 05 November 19
No. Sorry. ;D
Post by: SkulleateR on 02:01, 27 December 19
Anybody tried any UART modules with USIFAC by now, such as Catalex MP3 player, or FM Radio module, or MIDI UART board?
I had ordered 2 FM modules a while ago but there are still on the ship from China.
I just tried to connect the Mini DFPlayer (MP3) to the USIfaC but I'm not quite sure which commands to send to get it played ... ???
Post by: ikonsgr on 21:05, 27 December 19
To get a byte, give:
if INP(&FBD1)=255 then a=INP(&FBD0)
Now variable a has the received byte.
Post by: SkulleateR on 21:13, 27 December 19
As far as USIfAC is concerned, you can read the manual. In 2 words, it's reather easy and straight forward to send a byte by just giving: OUT &fbd0,X (X:0-255)Yes, I´m aware of that ;)
To get a byte, give:
if INP(&FBD1)=255 then a=INP(&FBD0)
Now variable a has the received byte.
Problem is, that the DFPlayer needs to get some initial routine on UART to get a mp3 played, and I don't seem to get that right :-[
Post by: LambdaMikel on 17:33, 28 December 19
https://github.com/lambdamikel/LambdaSpeak3/blob/master/cpc/lambda/LS300.dsk (https://github.com/lambdamikel/LambdaSpeak3/blob/master/cpc/lambda/LS300.dsk)
MP3 basic demo program.
Of course, this doesn't work with USIfAC serial interface (it was written for LambdaSpeak 3), but you can see what bytes to send over the serial port in order to control the MP3 module.
Post by: SkulleateR on 16:07, 29 December 19
Post by: secmast on 15:24, 03 January 20
Can I power this device from the USIfAC directly or should I power it from an external power supply ?
In the case of external power supply is the ground should be "comon" ????
Thanks
Post by: ikonsgr on 11:49, 04 January 20
BUT, when you use a direct usb2serial adapter (which takes power from usb port), you must NOT connect 5v supply pin, ONLY tx,rx and ground is needed.
Post by: secmast on 12:17, 04 January 20
Post by: secmast on 11:40, 16 January 20
I've done a small RS232 terminal program in assembly supporting extended ASCII characters in Latin-1252.
This is very simple to use it, launch the program, choose the desire speed and you ready to go.
There is no Log/Buffer in place yet, but at least you can connect to any RS232 device up to 115200bps.