Hands-On RTOS with Microcontrollers

Setting up the code

There are only two significant differences in this example:

• We'll use xSemaphoreCreateMutex() instead of xSemaphoreCreateBinarySemaphore().
• No initial xSemaphoreGive() call is required since the mutex will be initialized with a value of 1. Mutexes are designed to be taken only when needed and then given back.

Here's our updated example with the only significant change. This excerpt can be found in mainMutexExample.c:

mutexPtr = xSemaphoreCreateMutex();assert_param(mutexPtr != NULL);

There are some additional name changes related to the semPtr to mutexPtr variable name change, but there is nothing functionally different.