Boot issue, RTCWDT_RTC_RESET

[jonnyvikan]

Hi,

our application normally works OK, but sometimes the boot fails with repeated resets as follows:

Code: Select all

rst:0x10 (RTCWDT_RTC_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun  8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x17 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371
ets Jun  8 2016 00:22:57

This typically occurs when power is switched off then on very fast. We believed it could be a problem with the MTDI function of selecting 1.8V/3.3V so we have set the fuse option to force the SPI voltage to 3.3V. Still the problem occurs, any clue what is going on?

Also note that when this repeated reset behaviour occurs it does not stop by itself in any point. Even if power is turned off for, say, 5-10 seconds the boot still fails with the same problem. Usually a 'make monitor' is enough to fix the problem.

Thanks,
j