ESP32-C2: Examples reset by super-wdt in direct-boot mode

[bjoernQ]

e.g. cargo build --example systimer --features direct-boot && espflash flash --format=direct-boot --monitor target\riscv32imc-unknown-none-elf\debug\examples\systimer

Results in

ESP-ROM:esp8684-api2-20220127
Build:Jan 27 2022
rst:0x1 (POWERON),boot:0xc (SPI_FAST_FLASH_BOOT)
SYSTIMER Current value = 626782
Interrupt lvl1 (alarm0)
Interrupt lvl1 (alarm0)
Interrupt lvl2 (alarm1)
Interrupt lvl1 (alarm0)
Interrupt lvl2 (alarm2)
ESP-ROM:esp8684-api2-20220127
Build:Jan 27 2022
rst:0x12 (SUPER_WDT_RST),boot:0xc (SPI_FAST_FLASH_BOOT)
SYSTIMER Current value = 627306
Interrupt lvl1 (alarm0)
Interrupt lvl1 (alarm0)
Interrupt lvl2 (alarm1)
...

Might be only a problem with this one example

[MabezDev]

This will most likely be the case for C3/C6 too? AFAIK we don't disable super wdt in esp-hal. The esp-idf bootloader sets it to auto-feed, so using direct boot will miss this step.

[bjoernQ]

Just had a look: Some examples contain rtc.swd.disable(); and some not - and it's different for different targets. So probably we should just add it for all the examples - or remove it from all of them ... this way it's at least very confusing behavior without looking into the code