Edge Cases

gistfile1.txt

st-flash --area=otp write /tmp/otp.bin 0x1fff73ff
st-flash 1.7.0-316-g31c7fc6-dirty
2023-11-08T15:19:03 INFO common.c: STM32L496x_L4A6x: 320 KiB SRAM, 1024 KiB flash in at least 2 KiB pages.
file /tmp/otp.bin md5 checksum: 883428dc39b49fcfbf476cf14510d, stlink checksum: 0x00000360
2023-11-08T15:19:03 INFO common_flash.c: Attempting to write 24 (0x18) bytes to stm32 address: 536835071 (0x1fff73ff)
2023-11-08T15:19:03 ERROR common_flash.c: The size exceeds the size of the flash (0x00000001 bytes available)
stlink_fwrite_flash() == -1


st-flash --area=otp write /tmp/otp.bin 0x1fff73ff
st-flash 1.7.0-316-g31c7fc6-dirty
2023-11-08T15:20:15 INFO common.c: STM32L496x_L4A6x: 320 KiB SRAM, 1024 KiB flash in at least 2 KiB pages.
OTP Write Not implimented


st-flash --area=otp read /tmp/otp.bin
st-flash 1.7.0-316-g31c7fc6-dirty
2023-11-08T15:21:02 INFO common.c: STM32L496x_L4A6x: 320 KiB SRAM, 1024 KiB flash in at least 2 KiB pages.
OTP Read not implimented

success

st-flash --area=otp write /tmp/otp.bin 0x1fff7388
st-flash 1.7.0-316-g31c7fc6-dirty
2023-11-08T15:22:45 INFO common.c: STM32L496x_L4A6x: 320 KiB SRAM, 1024 KiB flash in at least 2 KiB pages.
file /tmp/otp.bin md5 checksum: 883428dc39b49fcfbf476cf14510d, stlink checksum: 0x00000360
2023-11-08T15:22:45 INFO common_flash.c: Attempting to write 24 (0x18) bytes to stm32 address: 536834952 (0x1fff7388)
2023-11-08T15:22:45 INFO flash_loader.c: Starting Flash write for F2/F4/F7/L4
2023-11-08T15:22:45 INFO flash_loader.c: Successfully loaded flash loader in sram
2023-11-08T15:22:45 INFO flash_loader.c: Clear DFSR
2023-11-08T15:22:45 INFO flash_loader.c: Clear CFSR
2023-11-08T15:22:45 INFO flash_loader.c: Clear HFSR
2023-11-08T15:22:45 INFO common_flash.c: Starting verification of write complete
2023-11-08T15:22:45 INFO common_flash.c: Flash written and verified! jolly good!


st-flash --area=otp read /tmp/otp.bin
st-flash 1.7.0-316-g31c7fc6-dirty
2023-11-08T15:23:14 INFO common.c: STM32L496x_L4A6x: 320 KiB SRAM, 1024 KiB flash in at least 2 KiB pages.
2023-11-08T15:23:14 INFO common.c: read from address 0x1fff7000 size 1024


hexdump /tmp/otp.bin
0000000 0048 0049 0030 2000 ffff ffff ffff ffff
0000010 ffff ffff ffff ffff ffff ffff ffff ffff
*
0000380 ffff ffff ffff ffff 2100 01f4 4859 3750
0000390 3250 3038 0038 0000 0000 0000 0000 0000
00003a0 2100 01f4 4859 3750 3250 3038 0038 0000
00003b0 0000 0000 0000 0000 2100 9f6a 5253 4d50
00003c0 5249 4f4b 3333 4100 0000 0056 0000 0a00
00003d0 2100 9f6a 5253 4d50 5249 4f4b 3333 4100
00003e0 0000 0056 0000 0000 2100 6559 5253 4d50
00003f0 5249 4f4b 0033 0000 0000 0000 0000 0000
0000400