Programming AMJ40 is making me sad

[pigsu]

Hi, I got instantly and inexplicably obsessed with mechanical keyboards somehow. One minute I was looking at obscenely expensive chef knives on Instagram and then somehow I was deep in the 40% rabbit hole.

I got a couple of AMJ40s from TaoBao and was all set to start training my hands to contort. But the default programming of the boards doesn't have a FN key, or a layer change key, so there's no way to type anything other than letters.

I've been trying to program a new layout for ages now, but It's all been in vain.

The short summary is that no matter what I program, the keyboard comes back to life in exactly the same state as it was before.

I wrote up the question on Stack Overflow, but I might have more luck here.

http://stackoverflow.com/questions/41788455/dfu-programmer-claims-completion-but-no-change-on-chip

Kalp1 had the same problem here and flabbergast suggested trying boot magic but I can't seem to make that work.

[odd]

The keymap is in EEPROM so it persists over reboots. Look at the JD40 and JD45 threads on stuff you can try. Also the QMK firmware has a erase EEPROM hex you can use to wipe it.

[a-c]

Did you do a

Code: [Select]

make clean and recompile after changing the keymap?

[pigsu]

Odd, that worked perfectly! Thanks.

I an using dfu-programmer 0.6.1, so the command from the quantum tools is slightly different,

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dfu-programmer atmega32u4 flash-eeprom eeprom_reset.hex rather than

Code: [Select]

dfu-programmer atmega32u4 flash --eeprom eeprom_reset.hex
EDIT: I wrote up the answer on SO

[odd]

Odd, that worked perfectly! Thanks.

I an using dfu-programmer 0.6.1, so the command from the quantum tools is slightly different,

Code: [Select]

dfu-programmer atmega32u4 flash-eeprom eeprom_reset.hex rather than

Code: [Select]

dfu-programmer atmega32u4 flash --eeprom eeprom_reset.hex

woowoo!!! Yay my first reply to someone asking for help and I managed to help someone out 

[OFred]

Hey Guy

I just bought this AMJ40 too !
pigsu I cheched what you did / wrote.
I'm on a Mac, installed everything needed (dfu-programmer included).

I can successfully do a
make dfu

Code: [Select]

dfu-programmer atmega32u4 erase --force
.....
Validating...  Success
0x4280 bytes written into 0x7000 bytes memory (59.38%).
dfu-programmer atmega32u4 reset

But now I'm wondering which file i need to modify to change the layout ? I saw some beautiful JS file, are they useful ?
Then I changed the keymap_default.c and make all / make dfu.
But nothing change. Which step did I miss?

I'm afraid that OS X configure the keyboard as a QWERTY keyboard and whatever I can change it will still be a QWERTY keyboard ?!

Thanks a lot for any feedback
Fred

[HeroXLazer]

I'm always sad when (trying to) programm(ing) anything...

[poang]

AMJ is silly B ：D  u should buy CW40 from taobao 

[OFred]

Miracle I manage to program it !!!! 
The only key i did not find for now is the CMD (mac) key ....... what 's its name ?

* OFred close to be happy