Unfortunatelly what you've described here as a solution is not a real solution except maybe for the simplest cases. Don't misunderstand me, I have stumbled to this issue as well, and asked for solution. https://esp32.com/viewtopic.php?t=9418 What you describe here (if I understand it correctly) is b...

After having issues with interrupt latency I've checked an older thread where it's described that interrupt latency with C is around 2us. Is there a way (if possible code please) to improve it with some kind of in-line assembly (without RTOS change)? My ISR routines are very simple e.g. capturing PC...

- 32 bit PCNT counter (with capture possibility)
- better interrupt latency (even when using C/Arduino)
- better ADC (less noisy conversion, better linearity)

It is possible to use the PCNT without any control pin if -1 is assigned to control GPIO at initialization time. Thus: pcnt_config.ctrl_gpio_num = -1; Via this and my earlier sample it is possible that counting is started/stopped entirely from SW (in my case from interrupt code, connecting the contr...

Sorry for hijacking this thread with a question that somewhat still relates to it. So I'd like to control from ISR when PCNT counting is started/stopped (without any control pin assigned to this). That is i'd like to connect the input signal of 41 (pcnt_ctrl_ch0_in0; PCNT unit 0, channel 0) to GPIO_...

One more question related to MCPWM. Would it be possible to force a one shot capture mode? So what I mean that after the mcpwm_capture_enable is called and a single capture happens, ESP32 by its own would stop capturing of the given capture signal (counter still counting in the background, only the ...

External divider (prescaler) is no issue and in fact I use it for higher frequency signals. However I've tried to build reciprocal counter also where instead of RMT gating MCPWM capture is used (and capture interrupt with very tight timing to make gating synchronous with the signal to be measured) a...

I'm building with ESP32 a high precision frequency meter. Under high precision I mean 7-8 digits. Later on I plan to use Neo-7N GPS receiver to calibrate and improve precision (via 1pps output; it works, tested already). I've used RMT to generate gating signal and PCNT to count the signal to be meas...