Reading Multiple ADCs and Setting Multiple PWMs in Parallel
Posted: Wed Jan 03, 2024 12:49 am
Hello everyone,
I am programming an ESP32 with Arduino IDE. Due to my specific application, my program reads analog signals from 8 ADC pins sequentially, just like the following code shows:
However, this introduces a delay of ~90 microseconds between each analogRead() and is unfavorable for me. I would like to ask if there is a way that I can sample all of them simultaneously, which means reading all ADCs in parallel.
Another question I have is somewhat similar to the above. Currently, my program also sets up multiple PWM channels sequentially, as shown in the following code. I am seeking a way to set up multiple channels simultaneously, therefore, multiple channels are synchronized and there is no delay due to the runtime required by sequentially executing the program.
Any input or suggestion is highly appreciated. Thank you very much and happy new year!
I am programming an ESP32 with Arduino IDE. Due to my specific application, my program reads analog signals from 8 ADC pins sequentially, just like the following code shows:
Code: Select all
adc[0] = analogReadMilliVolts(15);
adc[1] = analogReadMilliVolts(25);
adc[2] = analogReadMilliVolts(32);
adc[3] = analogReadMilliVolts(33);
adc[4] = analogReadMilliVolts(34);
adc[5] = analogReadMilliVolts(35);
adc[6] = analogReadMilliVolts(36);
adc[7] = analogReadMilliVolts(39);Another question I have is somewhat similar to the above. Currently, my program also sets up multiple PWM channels sequentially, as shown in the following code. I am seeking a way to set up multiple channels simultaneously, therefore, multiple channels are synchronized and there is no delay due to the runtime required by sequentially executing the program.
Code: Select all
ledcChangeFrequency(13, parameter[0], timerResolution);
ledcWrite(13, parameter[1], parameter[2]);
ledcChangeFrequency(0, parameter[3], timerResolution);
ledcWrite(0, parameter[4], parameter[5]);
ledcChangeFrequency(1, parameter[6], timerResolution);
ledcWrite(1, parameter[7], parameter[8]);
ledcChangeFrequency(14, parameter[9], timerResolution);
ledcWrite(14, parameter[10], parameter[11]);