ESP32 Forum

Hi,

I guess the following is a bug:

The bootloader code assumes that the two flash sectors follow immediately after each other (bootloader_start.c):
sa = ota_select_map[0];
sb = ota_select_map[1];

The app_update component assumes a fixed distance of the two structures of SPI_FLASH_SEC_SIZE (=4096) bytes:
memcpy(&s_ota_select[0], result, sizeof(ota_select));
memcpy(&s_ota_select[1], result + SPI_FLASH_SEC_SIZE, sizeof(ota_select));

As a result, the bootloader will never see a valid second sector.

Could you please verify this?

Thanks and greetings
Andreas

Hi Andreas,

Thanks for reporting this, you are correct about the bug. We are testing a fix internally, it should be in esp-idf master soon.

Angus