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Verifying FreeRTOS port

Posted by iamnitish on January 21, 2019

With the reference of renesas v850 port, we have ported RTOS for RH850.We have tested the tick freq. by toggling the led in the task using vTaskDelay function on oscilloscope. Now we want to verify and validate our porting. Is there any test code sequence for testing? or How to verify that the other functionallity of FreeRTOS?

Verifying FreeRTOS port

Posted by rtel on January 21, 2019

I recommend the following three things.

1) Register test tasks

These fill the registers with known values, then continuously check each register still contains its expected value while a soak test is running. Each register uses a different value, and at least one of the register test tasks should yield. Run the tasks at the lowest priority. Examples:



2) Run the interrupt nesting demo: https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Demo/Common/Minimal/IntQueue.c

Which requires you to provide a port specific implementation of a few functions that set up at least two, ideally three, hardware timers with their appropriate interrupt handlers. You can copy examples from the existing code (examples here chosen at random, there are lots of examples): https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Demo/CORTEXM7SAMV71XplainedAtmelStudio/Full_Demo/IntQueueTimer.c

https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Demo/RX700RX71MRSKRenesase2studio/src/FullDemo/IntQueueTimer.c 3) Run as many examples as you can, especially the newer examples for things like task notifications, these are really test functions. Here you can copy many of the 'full demo' configurations. They start loads of examples then have a 'check' task ensure they are still functioning correctly - all the while there are the interrupt nesting tests running. Ensure that the interrupt nesting depth reaches at least 3. There are some macros you can define in the code to insert null loop delays to ensure code coverage - but generally doing all this together gives you 90+ % coverage without the delays. Example: https://sourceforge.net/p/freertos/code/HEAD/tree/trunk/FreeRTOS/Demo/RISC-VRenodeEmulatorSoftConsole/fulldemo/mainfull.c

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