Hi, I am using LittleFS with some external flash. This works great on it's own, but when part of our growing program it has started crashing with the "Unaligned memory access" fault. It was fine before our project grew in size. This may be a memory issue somewhere. I am not sure how to locate the problem.
Here is the fault message:
[00:00:00.603,668] <err> os: ***** USAGE FAULT ***** [00:00:00.603,668] <err> os: Unaligned memory access [00:00:00.603,698] <err> os: r0/a1: 0x00000000 r1/a2: 0x00000001 r2/a3: 0x00000001 [00:00:00.603,698] <err> os: r3/a4: 0x200009ce r12/ip: 0x00000000 r14/lr: 0x00016cad [00:00:00.603,729] <err> os: xpsr: 0x61000000 [00:00:00.603,729] <err> os: s[ 0]: 0x200008bd s[ 1]: 0x00000001 s[ 2]: 0x2000597c s[ 3]: 0x2000a538 [00:00:00.603,790] <err> os: s[ 4]: 0x00000004 s[ 5]: 0x0002f048 s[ 6]: 0x00000000 s[ 7]: 0x0001667f [00:00:00.603,790] <err> os: s[ 8]: 0x20001bf8 s[ 9]: 0x200008bd s[10]: 0x2000a5c0 s[11]: 0x2000a5c0 [00:00:00.603,820] <err> os: s[12]: 0x000257e1 s[13]: 0x00000000 s[14]: 0x00000000 s[15]: 0x0001223d [00:00:00.603,820] <err> os: fpscr: 0x20005858 [00:00:00.603,851] <err> os: Faulting instruction address (r15/pc): 0x0002e07a [00:00:00.603,881] <err> os: >>> ZEPHYR FATAL ERROR 31: Unknown error on CPU 0 [00:00:00.603,912] <err> os: Current thread: 0x20005688 (unknown) [00:00:01.046,905] <err> fatal_error: Resetting system *** Booting nRF Connect SDK v3.5.99-ncs1-1 ***
addr2line = C:/ncs/v2.6.1/zephyr/kernel/mutex.c:57
line 57 = mutex->lock_count = 0U;
variable mutex is at 0x200009ce <flash_storage+240> while debugging.
This happens while mounting the littlefs on the external flash chip
Some more info: