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ranenbg / Arduino-FFB-wheel

Stand-alone DirectInput USB device recognized in Windows as a joystick with force feedback functionality, based on BRWheel by Fernando Igor from 2017.
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Question about shift register #70

Closed hikineet98 closed 1 week ago

hikineet98 commented 2 weeks ago

Hello ranenbg. Thank you for this great project. I would like to ask about shift register.

Setup: -Arduino Leonardo -bts7960 -Arduino nano v3.0 ch340 (shift register) -Firmware: 241chfx

Behaviour: Button press not work on Tx, d3 pin and other pins at Leonardo side (eg: button to switch to reverse gear at pin 4) when firmware 241chfx used. But those pins do work when i switched to firmware 241ahx.

I don't really know how the shift register work, but when i measured the voltage on each pin, pins that work show ~5v when button not press and 0v when pressed. Pins that not work is opposite.

One more thing is about Arduino nano firmware upload. I saw an old issue when you suggested upload using atmega328p (old bootloader). But when i upload using old bootloader, it just freezed at uploading state. Upload using atmega328p works immediately.

About those buttons that work. When i pressed 4 or more buttons, all the buttons in the nano just pulsing.

Also I'm using a long phone cable to connect from Leonardo to nano, and a breadboard to connect all gnd and vc pin. Could it be too long connection or maybe some thing not properly connect cause this problem?

Please enlighten me.

ranenbg commented 2 weeks ago

Hi, you're welcome.

Tnx for reporting this issue. I have not seen it before and I can't tell right away why this is happening. I will have a look at this particulair HEX version on Leonardo and let you know. My initial guess is that it has something to do with nano v3.0, as I didn't use those new ones, only older ones that come with "old bootloader".

The "shift register" code for nano has internal pullups enabled which means that all pins will be high (5V) - not pressed, until shorted to gnd (0V) - pressed. It is wierd if that's not the case on nano.

Pin Tx is not for button, it is one of encoder pins. Pins D3, D4 are buttons but not in all HEX. I will look into this, to see if I can reproduce the issue and see what can be done about it.

hikineet98 commented 2 weeks ago

Thanks for the quick reply. My wheel is totally usable and i have already enjoyed some games so please take your time. But you know, the more buttons the better :))

ranenbg commented 2 weeks ago

Ok, I have managed to reproduce the issue where on HEX v241chfx, pins on nano 3.0 (with buttonbox code) Tx, D3 and D4 are not working. I'll see if anything can be done about that, if so, I'll update the buttonbox code for that nano version. I had to set ATmega328P in order to get it to upload, as the "old bootloader" did not manage to upload to this 3.0 board. It has a new bootloader and there is something different, I don't know what.

Also, you are correct, pin D4 on Leonardo for the reverse gear button is not working. I have to fix that somehow in the following fw version, tnx once again for reporting it.

edit. After some testing, I've found where the issue is and it has nothing to do with nano v3.0. The reverse gear button is actually on D4 of nano (buttonbox) for HEX v241chfx and on A0 for HEX v241cfx. It was not intentional, but the shifter can still work :) As for the nano pins Tx and D3, I'm working on a fix for that.. edit2: I have made a new HEX v241chfx where I fixed Tx and D3 on nano buttons, it is uploaded in the ffb wheel repository, you can get the HEX from Leonardo hex folder.

hikineet98 commented 1 week ago

Thanks for the quick update! I'll test it when i get home and close the issue if there's no other problems.