bootloader_jump doesn't work

[kejadlen]

I feel like I must be doing something wrong, but I can't get bootloader_jump to work. Is there anything else I need to do besides changing BOOTLOADER_SIZE in config.h and using the following code in the keymap?

if (id == TEENSY_KEY) {
    clear_keyboard();
    print("\n\nJump to bootloader... ");
    _delay_ms(250);
    bootloader_jump(); // should not return
    print("not supported.\n");
}

Source here, if that helps at all: https://github.com/kejadlen/tmk_keyboard/tree/master/keyboard/planckeus

I also inadvertently ran the bootloader jump with the wrong bootloader size before realizing that needed to be changed - would that have any effect on future uses of bootloader_jump?

[tmk]

I glanced over your codes; keymap and Makefile. It looks to me ok and should work.

And jummping wrong address won't have any permanent effect on hardware or firmware.

[kejadlen]

Ah, I didn't notice this in the output before:

keymap_default.c: In function 'action_function':
keymap_default.c:39:9: warning: implicit declaration of function 'bootloader_jump' [-Wimplicit-function-declaration]
         bootloader_jump(); // should not return
         ^

Could this be why it's not working?

[kejadlen]

Interestingly, the physical button doesn't work after I try to get into the bootloader via the action function. I need to unplug the USB cable, re-plug it back in, and then hit the physical button for it to do anything.

[tmk]

Weird, reset button should work all the time even if firmware goes mad.
I don't have Teensy to test at hand and don't know if bootloader_jump code really works for Teensy.

[tmk]

You can try this old code instead of current bootloader_jump().
https://github.com/kejadlen/tmk_keyboard/blob/master/common/avr/bootloader.c#L87

The old code is from PJRC article and expected to work with Teensy bootloader.
https://www.pjrc.com/teensy/jump_to_bootloader.html

[kejadlen]

Drat, forgot to mention that bootloader_jump works just fine on my Ergodox: https://github.com/kejadlen/tmk_keyboard/tree/master/keyboard/ergodox, so it seems the current code does at least work for the Teensy there.

[technomancy]

I can confirm this on my Teensy: https://github.com/technomancy/tmk_keyboard/commit/876f356900504a8d38af72c918c1373073df0cf3

[kejadlen]

@technomancy Does that SHIFT macro work? I'd love to get rid of the tons of fn_actions I have for shifted keys at the moment.

[technomancy]

It doesn't work, but I have a lead on how to make it work; see #184.

[technomancy]

@kejadlen bootloader_jump still isn't working for me, but I got the SHIFT macro working on my teensy2 branch.

[p3lim]

Add this to the top of the file where you're using bootloader_jump():

#include "bootloader.h"

Works fine for me on my Teensy2: p3lim/keyboard_firmware@5ad92cd

[kejadlen]

@p3lim Tried that, but it doesn't work for me.

[p3lim]

@kejadlen Any errors when compiling?

[kejadlen]

@p3lim No, it compiles just fine, but trying to use FN0 (the bootloader jump) freezes/crashes the keyboard so I need to reset it by pulling the USB plug.

[tmk]

What's your keyboard hardware in fact? and Which Teensy?
You said you can't use reset button when it freezes. Doesn't pushing reset button for long like 5-10 sec work for you?

Seems like it jumps wrong address and goes mad.