Something wrong in part 6 (Mutex demo)

[m3y54m]

Hello,
First of all, thank you for this great course.
I'm currently following the course and trying to write and test all the demos and challenges.

In part 6 where you talk about Mutex, I noticed that there is something wrong and only one of the tasks is executed, and the other task is completely blocked and never executed.

I found out this problem by adding these lines before Serial.println(shared_var); line in esp32-freertos-06-demo-mutex.ino.

The function pcTaskGetName(NULL) returns the pcName of the task.

      Serial.print(pcTaskGetName(NULL));
      Serial.print(" : ");
      Serial.println(shared_var);

This is the resulting output:

I still don't know why only one task is running. Maybe it has something to do with ‍‍xBlockTime or something else.

[ChrisVeigl]

I think the problem is that task1 immediately takes the mutex again after releasing it, as there is no blocking wait or other chance for the scheduler to let task2 run. The situation can be improved by introducing a small vTaskDelay() or by calling taskYield() after giving the the mutex.

BTW: the length of the taskname string parameter should be reduced to fit the default size limit of 16 bytes (including '\0').