Mutex type semaphores cannot be used from within interrupt service routines.

[sp3esu]

Hi.

While working on my modification of Sound Engine I got an issue that while reading some I2C sensors software crashed. After a small investigation, I found that the I2C driver fails in using semaphore. I found such note in the documentation: "Mutex type semaphores cannot be used from within interrupt service routines."

After removing semaphore usage in the interruption handler function everything is working fine.

Rc_Engine_Sound_ESP32/src/src.ino

Line 1070 in 4f940f0

if ( xSemaphoreTake( xPwmSemaphore, portMAX_DELAY ) )

Replace xSemaphoreCreateMutex with xSemaphoreCreateBinary is not making any change - software is still crashing.

This can lead to other unexpected issues, so I suggest changing the way how channels data is synchronized. I didn't figure out it yet by myself. If I find a way I'll create PR.

Best Regards!
Gregor

[Schrottschrauber]

Hello,
when integrating the I2C DAC MCP4728 to control a power servo I also get constant RESETS.
The initialization works fine, but I get resets when outputting the speed.
Can you tell me exactly what you have changed so that it works?

I am grateful for any help