Keyboard doesnt boots after tried to flashing with another firmware

Thanatermesis commented 1 year ago

I wanted to create this bug report especially to have some information on internet about this issue.

Today I was wondering how my ergodox will work with another firmware (qmk) so I tried to use it, what can happen? I will only need to reflash my older firmware on which I have a very good keymap...

Thats what I did, and it worked, I have put back this original firmware, my leds flashed as my own customization and my keys worked perfectly.... then when I rep-plugged the keyboard, nothing worked, no startup leds, no keys, nothing... wtf? I was scared

So I tried to re-program it, replug it, reprogram, no way... the only way is: by flashing the qmk firmware, and then this one again, this works correctly... until you re-plug the keyboard

Is this normal? I mean, the chip is not meant to be entirely rewrited when flashing? what could have changed that does that now ? this is a bit weird...

So now im forced to use the qmk firmware (this will require me a lot of time to convert my special keymap) or to... create a script that does a double flashing everytime my ergodox is disconnected lol

Well, any idea of why this is happening is welcome, anybody has seen this problem before? I can of course do more tests with my strange keyboard state if you want to

Notes: yes i tried to use the "reset" and the "eprom reset" keys from the qmk firmware, even if im not sure what exactly they does thinking

benblazak commented 1 year ago

bug confirmed on one of my boards. this is really weird.

Thanatermesis commented 1 year ago

it is, the only difference the keyboard is meant to have is an entirely different, rewrited contents, isnt? im not expert on it but i cannot get how this bug happens, the hardware is the same of course

benblazak commented 1 year ago

i don't understand it yet either -- and i may not have time to figure it out, but i've been looking at it a bit today.

if you unplug the TRRS jack, and then unplug -> replug the USB, it will work, though it blinks an error (i'm still trying to remember what that means lol, it's been a while). if you then plug in the TRRS cable (quickly, maybe not too quickly) both sides will work.

not really a workaround, but interesting.

benblazak commented 1 year ago

not sure if i should have spent so long working on this today lol, but i got it!

two ways to fix

first way

if you comment out these two lines it should work

it's this for loop that's keeping the function from returning.

of course if you're using macros (i can't remember if i ever got them to work) this isn't the solution you want lol.

second way

install teensyduino https://www.pjrc.com/teensy/teensyduino.html
run the sketch below (modified from here) to set every byte in the eeprom to 0xff

#include <EEPROM.h>

void setup() {
  // initialize the LED pin as an output.
  pinMode(11, OUTPUT);

  for (int i = 0 ; i < EEPROM.length() ; i++) {
    EEPROM.write(i, 0xff);
  }

  // turn the LED on when we're done
  digitalWrite(11, HIGH);
}

void loop() {
  /** Empty loop. **/
}

for whatever reason, initializing all eeprom bytes to 0x00 doesn't seem to work. definitely a bug, but not one i'm going to try and fix right now (lots to do).

thanks for catching this.

benblazak / ergodox-firmware

Keyboard doesnt boots after tried to flashing with another firmware #95

first way

second way