MSP432E401Y: MSP432E401Y TI-RTOS and using CRC_calculateFull() Function clarifications

Hi Perry,

Perry Ferren said:

I want to ensure I understand the difference between the options Blocking, callback, or polling return behavior.

  Please refer to the explanation in this web page. https://software-dl.ti.com/simplelink/esd/simplelink_msp432e4_sdk/4.20.00.12/docs/tidrivers/doxygen/html/_c_r_c_8h.html#a8b296466741fa36ab51155a7edc1dd4f

Perry Ferren said:

I do not understand this option.

I am wondering if perhaps I should be using the CRC_addData() and limiting the task to cyclically performing small junks of the CRC calculation and when complete call CRC_finalize()...or can the CRC_calculateFull () function be used with the polling or call back option to support the same desired outcome, which is allowing the higher priority tasks to pre-empt the CRC verification when they are scheduled to run?

CRC_RETURN_BEHAVIOR_POLLING is the default and it can be used for CRC_calculateFull. The below shown example uses CRC_RETURN_BEHAVIOR_POLLING along with CRC_calculateFull(). In my opinion, the higher priority tasks may preempt before the 80kB table is finished but it should come back to your CRC task. I any case you should check the function return status. Using CRC_addData() does have a finer grain of control. However, tasks are asynchronous to each other. Even for calculating a small chunk of data at a time, it can still be preempted by the higher tasks unless you use blocking.