Hello,
We are evaluating SCST component (S32K144_M4SCST_1.0.6_D2106) on our target which is equipped with S32K148.
We are using an RTOS (SafeRTOS) and thus configured SCST accordingly for Systick usage:
#define M4_SCST_SYSTICK_IS_RUNNING 1U
But when using the scst tests at runtime, after a random amount of time (could be a few seconds to 2 minutes), we get an error M4_SCST_TEST_WAS_INTERRUPTED from the return value of m4_scst_execute_core_tests.
The test involved in the error changes according to runs ( checking m4_scst_last_executed_test_number we found test 9, 11, 14 ...).
The issue is that once this happens, the system becomes unstable. After some long research into possible incorrect configuration or misuse of the library and/or issues in our system itself (interrupt and task priority etc...), we went back and checked for additional documents from NXP and found the SW32K144_M4SCST_1.0.6_D2106_LOKD.
It list this item:
CSTL-960 : [M4_SCST] PRIMASK and NVIC registers corrupted when SysTick is running.
We checked and indeed, as in your Know defect, after the interruption happens, all the NVIC registers for interrupts are reset to 0:
Before Interruption:
After Interruption:
In the "Resolution" field for 2022-Jun-14 there is:
"Fixed problem with corrupted PRIMAK and NVIC registers when M4_SCST_TEST_WAS_INTERRUPTED is returned.
Updated:
- m4_scst_exception_test_systick.s
- m4_scst_exception_lib.s"
Can you provide the fix to us ? Is there a planned official release of this fix?
Best regards,
Jérémie Chirat
