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samd21: Add support for flashing an application via the bossac tool 

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This commit is contained in:
Kevin O'Connor 2018-11-30 22:22:42 -05:00
parent f2179da8ad
commit e505ab0df1
2 changed files with 15 additions and 5 deletions
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8
docs/Bootloaders.md
View File

@ -195,8 +195,12 @@ SAMD21. One comes standard with the "Arduino Zero" and the other comes
standard with the "Arduino M0".
The Arduino Zero uses an 8KiB bootloader (the application must be
compiled with a start address of 8KiB). This document does not cover
the flashing mechanism for this bootloader.
compiled with a start address of 8KiB). One can enter the bootloader
by double clicking the reset button. To flash an application use
something like:
```
bossac -U -p "$(FLASH_DEVICE)" --offset=0x2000 -w out/klipper.bin -v -b -R
```
The Arduino M0 uses a 16KiB bootloader (the application must be
compiled with a start address of 16KiB). To flash an application,

12
src/samd21/Makefile
View File

@ -42,6 +42,12 @@ $(OUT)klipper.elf.hex: $(OUT)klipper.elf
@echo " Creating hex file $@"
$(Q)$(OBJCOPY) -j .text -j .relocate -O ihex $< $@
flash: $(OUT)klipper.bin
@echo ""
@echo " The SAMD21 build does not currently support 'make flash'"
# Flash rules
lib/bossac/bin/bossac:
@echo " Building bossac"
$(Q)make -C lib/bossac bin/bossac
flash: $(OUT)klipper.bin lib/bossac/bin/bossac
@echo " Flashing $^ to $(FLASH_DEVICE) via bossac"
$(Q)if [ -z $(FLASH_DEVICE) ]; then echo "Please specify FLASH_DEVICE"; exit 1; fi
$(Q)lib/bossac/bin/bossac -U -p "$(FLASH_DEVICE)" --offset=0x2000 -w $(OUT)klipper.bin -v -b -R