Need help regarding pcnt interface example into ESP32

[Ritesh]

Hi,

We have one project requirement in which we have taken few GPIOs as INPUT I/Os over ESP32 module (ESP32-WROVER). So, Those few INPUT GPIOs are connected with other machine's I/O pins.

So, We needs to measure timing of pulse for each I/Os with accuracy and based on that we needs decided actual logic according to that measurement.

I have checked regarding same and it seems like we can measure it using Pulse Counter (PCNT) interface module.

Let me know if I am going into wrong direction regarding same or any suggestion to do it using any other interface like PWM or any else

[Ritesh]

Hi ESP_Sprite,

Let me know if need anything else from my side regarding same.

[WiFive]

viewtopic.php?t=5699

[Ritesh]

viewtopic.php?t=5699

Thanks for Reply.

Are you sure that PCNT Interface will be useful for that requirement which we want to achieve? Would you please provide sample code as well?

[WiFive]

PCNT is for counting pulses not measuring pulses

[Ritesh]

PCNT is for counting pulses not measuring pulses

Ok. Our Project requirement is to measure timing of each pulse and we need to do it for at-least 8 to 10 I/Os which are on ESP32 module itself.

So, We basically want to measure timing for each pulse in which ESP32 board's I/Os will be connected with other module from which signals will be generated as per event detection.

Hope you will understand my requirement now and please suggest interface which i can prefer for that

[WiFive]

If you read the linked thread ESP_Sprite suggested RMT or MCPWM Capture. Since mcpwm has only 6 capture channels you probably should use RMT.

[Ritesh]

If you read the linked thread ESP_Sprite suggested RMT or MCPWM Capture. Since mcpwm has only 6 capture channels you probably should use RMT.

Thanks for quick response regarding same.

So, We can only use RMT Interface as per our requirement because PCNT is just to measure counts for Pulses and MCPWM has only 6 I/Os available for that