Hands-On RTOS with Microcontrollers

Starting the scheduler

With all of the options we have for creating tasks, you might be thinking that starting the scheduler would be a complex affair. You'll be pleasantly surprised at how easy it is:

//starts the FreeRTOS scheduler - doesn't//return if successfulvTaskStartScheduler();

Yep, just one line of code and no input parameters!

The v in front of the function name indicates it returns void. In reality, this function never returns – unless there is a problem. It is the point where vTaskStartScheduler() is called that the program transitions from a traditional single super loop to a multi-tasking RTOS.

After the scheduler is started, we'll need to think about and understand the different states the tasks are in so we can debug and ...