ESP32 Forum

Is it possible to use esp-idf framework for ESP8266-12 chip?

I'm using ESP8266 with ESP8266_RTOS_SDK and have found a problem with a sensitive 1-Wire bus timing (affected by the WiFi interrupts despite using taskENTER_CRITICAL/taskEXIT_CRITICAL macros). Then I found that esp-idf has a different implementation of those macros which prevents critical sections from being interrupted by the WiFi. This was pointed out by 'stickbreaker' in his implementation of the 1-Wire bus (https://github.com/stickbreaker/OneWire ... e.cpp#L149).

However, I could not flash the 'hello-world' example code to ESP8266. Does esp-idf support ESP8266 at all?

No

Also, I'm not sure if the ESP8266 would work at all with WiFi interrupts disabled... from memory, it needs the processor to service certain situations within a very short timeframe, so it uses high-priority interrupts to do so.

The difference between the critical sections between esp-idf and the earlier SDKs is mostly because the ESP32 is dual-core, by the way: disabling interrupts isn't enough there because it won't stop the other CPU from accessing your critical values, so it's implemented as a spinlock instead.

I tried solving this by (trying to ?) disabling all irq's, which improves things. But still timing tends to be off sometimes.
Details and issue here: https://github.com/espressif/ESP8266_RT ... issues/680 :)