Use a single generic eep file for resetting EEPROM

[fauxpark]

Description

Removed the MCU-specific atmega32u4_eeprom_reset.hex for a more universal .eep file which sets the first byte to 0x00 so that the first two bytes are no longer 0xFEED (which should trigger EEPROM reinit).

Works on macOS with a DFU keyboard. Windows, and Caterina on macOS still need testing.

Types of Changes

• Core
• Bugfix
• New feature
• Enhancement/optimization
• Documentation

Issues Fixed or Closed by This PR

• Fixes Reset EEPROM doesn't work for atmega32u2 #56

[drashna]

Tested this on DFU (atmega32u4 and atmega32u2), and a Pro Micro with caterina bootloader, all on Windows.

Seems to work perfectly!

[drashna]

Ugh, it doesn't want to work now, with additional testing. So, yeah, we do need the erase :(

[fauxpark]

It might just need --force to skip the blank check (that's where it's failing for me, anyway).

[fauxpark]

That seems to do the trick:

>>> dfu-programmer atmega32u4 flash --force --eeprom /Users/xxxxxxx/Library/Developer/Xcode/DerivedData/QMK_Toolbox-gdtrdjidcfskjkbqlxqokdgcpkat/Build/Products/Debug/QMK Toolbox.app/Contents/Resources/reset.eep
    0%                            100%  Programming 0x80 bytes...
    [>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]  Success
    0%                            100%  Reading 0x400 bytes...
    [>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>]  Success
    Validating...  Success
    0x80 bytes written into 0x400 bytes memory (12.50%).

Not sure why it's still apparently writing 128 bytes though... Probably something to do with page size.

[drashna]

--force doesn't work for me

Okay. I see the issue. We're using an old version of dfu-programmer in Windows. We need to use flash-eeprom to write the eeprom

[drashna]

Nope, that still doesn't work on Windows :'(

[fauxpark]

What version is it on Windows? The macOS version is 0.7.0, and --force --eeprom should be the correct command since at least that point: dfu-programmer/dfu-programmer@c41ef7b

[fauxpark]

Okay, I'm back at my VS env... --force works fine for me 😕

Also, the dfu-programmer versions are definitely the same.

[drashna]

0.7.2 for Windows. And it wasn't for me.

To clarify with some testing.... This works fine for the 32u4, but the 32u2 .... it will not write, even with force.

[drashna]

Though, I think for now, that should be fine.

Though... if we keep with the Toolbox, the "reset eeprom" may be better as an option for flashing, rather than a separate thing.

[fauxpark]

What's the output you get from trying to reset a 32U2?

[drashna]

Nothing helpful.

>>> dfu-programmer.exe atmega32u2 flash-eeprom "reset.eep" --force
    0%                            100%  Programming 0x80 bytes...
    [ X  ERROR
    Memory write error, use debug for more info.

And debugging info didn't dive anything useful

[fauxpark]

There's no such command as "flash-eeprom" as of 0.7.0, see the commit I linked above. Have you tried flash --eeprom --force "reset.eep"?

Okay, it appears to still work...