I can see it being declared in
Arduino/tools/sdk/include/user_interface.h, however there seems to be no definition of this.
system_adc_read() gets called in
system_adc_read_fast() to read the ADC, but can't actually find it in the code! Could somebody please point me to this? I've been struggling for quite some time.
Purpose: To manipulate the system_adc_read() in ESP8266 to get higher ADC sampling rates. Right now ADC sampling rate is 10ksps. I want it to be more than 30-40ksps.