[Compile Error] ATSAMD21J17A about uf2-samdx1 HOT 4 OPEN

I got this same error. Attempted to fix it by editing inc/uf2.h:

-#define FLASH_NUM_ROWS 1024
+#define FLASH_NUM_ROWS 512

That allows it to get past the STATIC_ASSERT, but then there is a linker error:

/usr/lib/gcc/arm-none-eabi/9.2.1/../../../arm-none-eabi/bin/ld: section .binfo LMA [0000000000001ff0,0000000000001fff] overlaps section .relocate LMA [0000000000001e30,0000000000001ffb]

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I don't mean to hijack the thread with my own issues, but I did get past the linker error by turning off some features in inc/uf2.h, namely USE_FAT, USE_INDEX_HTM, and USE_WEBUSB. Probably these features just made the bootloader too big for this chip.

Unfortunately, I'm now fighting OpenOCD issues. So I can't yet report on whether these fixes work.

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@dstahlke

I finally manage to solve this issue, i just change the chip compilation for the ATSAMD21G17, its a bit tricky but it works.

At this moment i dont have time to get the diff to see what its the real problem right now, but it should be a define or something like that.

Regards, Carlos.

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For me, it was enough to do the FLASH_NUM_ROWS change I mentioned above, set #define USE_INDEX_HTM 0 to make it a bit smaller, and define the chip type in board.mk:

CHIP_FAMILY = samd21
CHIP_VARIANT = SAMD21J17A

Also, -Wno-deprecated in the top Makefile and editing scripts/dbgtool.js to use a patched OpenOCD with ST-Link (master branch and releases of OpenOCD have a bug when using ST-Link with this chip).

With that, bossac in zephyr doesn't work, but putting *.uf2 on the USB FAT works.

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