search

raburton / rboot

An open source bootloader for the ESP8266
https://richard.burtons.org/tag/rboot/?order=ASC
MIT License
300 stars 72 forks source link

How to make ets_printf work in stage2a? #40

Open zdila opened 5 years ago

zdila commented 5 years ago

Is there a reason why ets_printf prints nothing from rboot-stage2a.c? It would be nice to have it for debugging purposes.

raburton commented 5 years ago

I can't think of any reason it wouldn't work from there, but we're running code from an area of memory we aren't intended to (it's normally for the flash cache, but isn't yet being used). Maybe the printf function isn't happy to access this area for it's parameters?

zdila commented 5 years ago

Note that ets_putc works there.