Tutorial Mjoy16 USB AVR Joystick

Hi,
thank you for your reply. I decline problem with soldering. I dont see 100k resistor in schematic. AVR i programing just few weeks but my avr burner (eXtreme Burner - AVR) wrote that all is allright.
Here is next image upload
[img600px]http://s23.postimg.org/gmt3dimy1/dps.png[/img600px]
[img600px]http://s23.postimg.org/ptbe0ss6h/side_of_component.png[/img600px]
Description of components :
C1-C2 are 15pF ceramic capacitor
C3 is 10uF elektrolyt capacitor
C4-C6 are 100nF ceramic capacitor
SV1 SV2 are matrix keyboard connector + connector for my usb asp programer [link]http://www.ebay.com/itm/USBASP-USB-AVR-Programmer-for-Atmel-USB-ASP-USBISP-ISP-Arduino-Bootloader-USA-/150739530304?pt=LH_DefaultDomain_0&hash=item2318c6b240[/link]
JUM2 is not jumper but +5 and GND connector for programer
Jum1 is reset conector for programer
Q1 is 12mhz xtal
R1 is 2k2
R2 is 4k7
R3-R4 are 80R
And D1 - D2 are 3v3 zener diode
Pad1-6 are potenciometers connectors

Can you help me ?

Hello again nkfo.

1. The resistors are 10k (my mistake) between Vcc and PC0 to PC7 as seen on:

http://www.x-simulator.de/forum/mjoy16-usb-avr-joystick-t726-130.html
and
http://imageshack.us/f/104/keymatrix.jpg/

Yes, I know they logically should be on the schematic for the main board but Mindaugas put them on his matrix board and most people say we need them. (Oh well.)

2. There is set of 330R resistors between MOSI MISO SCK and RESET and the micochip pins (R3 R4 R5 R6 R7 on the MJoy schematic from Mindaugas). Some programmers have them as well. You do not need both.

3. The commonest problem people have is not setting the switches in the AVR programming software correctly. Their correct settings are in the Mindaugas' original documentation

I built the board exactly using Mindaugas schematic (but not the Matrix board) and programmed it exactly using his instructions. I have nearly NO electronics knowledge and it worked just perfectly first up.

(Unfortunately your images or the links did not upload.)

Good luck,
George.

Good day

I reply on yours points in your text.

Point 1.: I think that 10k resistor are use on keyboard metrix for mjoy16 C1 aren´t ? I build mjoy 16 with atmega 8-16 no with atmega 16-16. And I think that this resistor no condition for recognized device.

Point 2.: I dont need 330R resistor on mosi miso sck (R5 R6 R7) connector for programing because i have porfesional programer kit. And what do you think about R3 and R4 ? This resistor haven´t value 330 but 80 or I am wrong ?

Point 3.: I use other software for burn AVR because PonyProg not support usb ISP avr programmer.

Thank you for your reply

Hi

NFKO

I'm away from Mjoy assembly a few years - but from my past experience (~ 8 assembly):

Unknow device are related with:

1 - Incorrect/incomplete firmware write procedure, major issues with fuses.

Recently a guy from another forum try write Mjoy16 firmware with USB programmer/software and get this unknow device error message.
In sukhoi.ry forum they told my that USB programmer probable are not compatible with Mjoy8 or 16 due voltage issues.

2 - Wrong components (or bad soldered one, short circuits) in PCB assembly, that cause Mjoy USB connection dont work properly.

Well, my experience with Mjoy's show that a Mjoy (8 or 16) that work well in some computer in another is unknow device, but work in a notebook with different Windows version...
Or a Mjoy16 that work perfectly in one or two computer plugged in another is not even recognized as unknow device, but a Mjoy8 work in this computer...
At end I tested 3 Mjoy (8 and 16) in 4 different computers (WIn XP, 7), with random results...

BTW - the assembly in the first page of this thread is wrong named Mjoy16, should by Mjoy or Mjoy8 (Mjoy16 use different ATMEGA, and different PCB scheme and firmware), and since is based in Mindaugas prototype was turned obsolete by Lazzy Camel/Mercury versions, although work.

If you have a ATMEGA 8-16 microcontroller (that is appropriate to build a Mjoy8 - not Mjoy16) this scheme linked is not applicable to this version:
http://imageshack.us/photo/my-images/10 ... .jpg/?sa=0
It is a Button Matrix for Mjoy16 only.

If you are using a breadboard to assembly, I suggest start again with Mercury scheme and firmware (one the more recently improvements*):

http://mercury13.tut.su/?q=mjoy

* There's a new improvement for Mjoy, called MMJoy - with different firmware (but use same MJoy8 or 16 PCB), support for new ATMEGA (32, 168, 328), a software called Configurator that allow to change axis/buttons/HAT configurations, VID/PID numbers and controller name in EEPROM via USB. But I think that this deserve a separated thread (this one are now a bit confuse).

Sokol1

Hello

Than you very much for link. I will try to make constructions on mercury web. I will tell you about compacted or failure.
Sokol1 Can you tell me, how construction of joystick you use now ?

Thank

OK i try this schematic http://mercury13.tut.su/files/mjoy/Mjoy_2011.png And my question is which firmware is compatible with microsoft flight simulator ?

OK, i tried to build this http://mercury13.tut.su/files/mjoy/Mjoy_2011.png on breadboard and I burned Atmega8-16 with universal firmware from this link http://mercury13.tut.su/files/mjoy/MJoy ... are_new.7z I set fuse by picture from this pdf download/file.php?id=339 and my PC write again that usb device not recognized I don´t know what i make bad ...

Hi, i need some working and tested layout for Mjoy16. But for all in one, so bigger PCB with Matrix and diodes.
Thanks :hi:

P.S. and please single-sided PCB

Hi Kuba5,

All that you need is in these posts from earlier in this thread. There is probably some repetition of information, but it should cover it.

mjoy16-usb-avr-joystick-t726-70.html#p15777
mjoy16-usb-avr-joystick-t726-100.html#p17329
mjoy16-usb-avr-joystick-t726-110.html#p17516
mjoy16-usb-avr-joystick-t726-110.html#p17527
mjoy16-usb-avr-joystick-t726-180.html#p18832

Have fun.

I have made a little MJoy and joystick page which I am working on. There might be some useful information in there for you. Check on the little WWW symbol.

Regards,
George.

Hello, and greetings from Poland. I've read through all the posts but nowhere i could find live link to mjoy with pcb 52x34 mm version. Plese e-mail me one if you have it or please send me a link. Best regards, Czarek.

Guess I wasn't looking good enough so far Here is a small version of the MJoy16 : http://translate.google.com/translate?s ... D1%258B%2F
Unfortunately link to modified documentation is inactive - the one has to guess component layout using only one diagram and a photo :/

Hi there !

I made some boards. (look at the pictures).
I have one assembled and two bare boards That I'm going to assemble or sell as is.

If there's demand I will also include my LOAD CELL Amplifier modules so it will be compatible with this interface. (look here for details http://forums.eagle.ru/showthread.php?t=57653)

Is there someone interested ?!

Please send PM.

http://img33.imageshack.us/img33/3408/ay8r.jpg


http://img62.imageshack.us/img62/2613/lgrc.jpg

Hi All,
I am currently working on my Mjoy 16 joystick. Please it is existing solution how to connect more then 4 rotary switches to Mjoy16???? It is necessary to change program????

Thx

For use more than 4 encoders need build a add on board, see here (schematic, firmware...).

https://sites.google.com/site/mjoy16/

Sokol1

Hello to all! I am new here, from Budapest.
I have a large problem with my new built MJoy16. I have the circuit diagram Version 1, with PCB design. Downloaded the firmware hex file and eep file too. Using the attached ISP adapter circuit, succesfully programmed the ATMega16-16PU. But the MJoy16 does not work absolutely! If I change the USB connection part of the circuit (R1=1k, R2 remove, D1 and D2=3.6V, R7 and R8=68ohm, in that case it is recognised as Human Interface, but staying as Unknown Device. If I try write different VID and PID, the computer reads out thise different dates(in Device Manager /Device propertis), but it stays as unknown device.
Please write me sombody, who has a working MJoy16-c1.
Had to make something hardware change?
I am afraid, the firmware program accesible on the net is fake one...
I have no idea more...The board is precise, made by me, having 20 years practice in electronic circuit building
Help, help , help!!
Thank You very much!
Steve

Hi Thanos!

Did a great work.

I need a little favor... will you please send me a firmware with replacing names "Rudder" and "Throttle" with Ry and Rz. i want to use it with an own made vb.net application.

Regards, Owais

Hi Owais,

You know... I have no idea what happened to the source code... I'll have to dig it out from my very old backups...

I made a new version now anyway that has native force-feedback (directx-9 compatible) as well




Thanos

Thanx Thanos for reply

I've found one MJoy.asm. I am attaching it here.

Does this resemble your's??

That's it... But you'll have to figure out how to compile it after you change the names. I think I used AVRstudio4 before for this.

Just a hint of how to do the change: The axis names are not actually names but values that point to the correct assignment in the driver side. So you'll have to find the correct descriptor for the Ry and Rz that you need:

Code:

ReportDescriptor:
        .db 0x05,0x01        ;Usage_Page (Generic Desktop)
        .db 0x15,0x00        ;Logical_Minimum (0)
        .db 0x09,0x04        ;Usage (Joystick)
        .db 0xA1,0x01        ;Collection (Application)
        .db 0x05,0x02            ;Usage_Page (Simulation Controls)
        .db 0x85,0x01            ;Report_ID (1)
        .db 0x09,0xBA            ;Usage (Rudder) - OK
        .db 0x09,0xBB            ;Usage (Throttle) - OK
        .db 0x15,0x81            ;Logical_Minimum (-127)
        .db 0x25,0x7F            ;Logical Maximum (127)
        .db 0x75,0x08            ;Report_Size (8)
        .db 0x95,0x02            ;Report_Count (2)
        .db 0x81,0x02            ;Input (Data, Var, Abs)

Maybe here you can find more info... http://www.usb.org/developers/hidpage/


Thanos