ESP8266 Community Forum

Does anybody know how to write the flash at the location where the irom is mapped? (ie. the AT commands)

spi_flash_write() at those addresses just locks up and triggers a watchdog reset.

I'm guessing it's something to do with the irom<->flash caching mechanism but I don't know how to suppress/bypass it.

spi_flash_* functions expect an address in SPI flash starting at 0. Not the adress where SPI flash is mapped.

Yes, I'm using the flash address not the irom address.

To be 100% clear: If my irom is at (eg) 0x40240000 and I do:

spi_flash_write(0x40000, ...)

This function will fail and trigger a watchdog reset.

nb. I can write to other areas of the flash, no problem. It's only address from 0x40000 and upwards that fail.

Try SPIWrite(...)?