Debugging c code tips?

You are reading a single comment by @user156811 and its replies. Click here to read the full conversation.

•

Gordon

I'm surprised you hit issues with --overlap=replace - my understanding was that's only really needed if the hex files overlap - and if they're overlapping generally that's probably going to cause you some problems as something is too big?

On the debug front, it's a nightmare with nRF52 because the softdevice tries to restart if it realises the CPU is halted for much time. There is a wdt_off GDB macro at https://github.com/espruino/Espruino/blob/master/.gdbinit#L31-L33 that you can call the very first time you break execution after the softdevice is started and I believe that will stop the reboot, but bluetooth connections will still completely break as soon as you start breakpointing stuff.

•

user156811 in reply to @Gordon

Ok so i don't think i'm running into a "error" --overlap. It seems like it part of the build script?

So there seems to be two types of defines

BOOTLOADER
USE_BOOTLOADER

And in my python board file i have 'bootloader' : 1. This one is sets USE_BOOTLOADER to true.

As for BOOTLOADER

BOOTLOADER=1 make the bootloader (not Espruino)

link to code

$(PROJ_NAME).hex: $(PROJ_NAME).app_hex
 ifdef USE_BOOTLOADER
  ifdef BOOTLOADER
	@echo Bootloader - leaving hex file as-is
	@mv $(PROJ_NAME).app_hex $(PROJ_NAME).hex
	# for testing:
	[#python](https://forum.espruino.com/search/?q=%23python) scripts/hexmerge.py --overlap=replace $(SOFTDEVICE) $(PROJ_NAME).app_hex -o $(PROJ_NAME).hex
  else
	@echo Merging SoftDevice and Bootloader
	@# build a DFU settings file we can merge in... family can be NRF52840 or NRF52
	nrfutil settings generate --family $(BOOTLOADER_SETTINGS_FAMILY) --application $(PROJ_NAME).app_hex --app-boot-validation VALIDATE_GENERATED_CRC --application-version 0xff --bootloader-version 0xff --bl-settings-version 2 $(OBJDIR)/dfu_settings.hex
	@echo FIXME - had to set --overlap=replace
	python scripts/hexmerge.py --overlap=replace $(SOFTDEVICE) $(NRF_BOOTLOADER) $(PROJ_NAME).app_hex $(OBJDIR)/dfu_settings.hex -o $(PROJ_NAME).hex
  endif
 else
	@echo Merging SoftDevice
	python scripts/hexmerge.py $(SOFTDEVICE) $(PROJ_NAME).app_hex -o $(PROJ_NAME).hex
 endif # USE_BOOTLOADER

```

Debugging c code tips?

About

Espruino