Posted on October 17, 2016 at 21:38
Hi !
I'm using freeRTOS with STM32CubeMX.
While playing with signals for inter-thread communication I came across the different return value of function
osSignalSet()
The CMSIS standard states:
int32_t osSignalSet(osThreadId thread_id, int32_t signals)
Parameters
[in] thread_id thread ID obtained by osThreadCreate or osThreadGetId.
[in] signals specifies the signal flags of the thread that should be set.
Returns
previous signal flags of the specified thread or 0x80000000 in case of incorrect parameters.
But STM32CubeMX creates:
/**
* @brief Set the specified Signal Flags of an active thread.
* @param thread_id thread ID obtained by \ref osThreadCreate or \ref osThreadGetId.
* @param signals specifies the signal flags of the thread that should be set.
* @retval osOK if successful, osErrorOS if failed .
* @note MUST REMAIN UNCHANGED: \b osSignalSet shall be consistent in every CMSIS-RTOS.
*/
int32_t osSignalSet (osThreadId thread_id, int32_t
signal
)
And indeed the only return values are osErrorOS (=255) or osOK (=0) !
Same applies to function osSignalClear()
Bug or feature ??? ;)
Best regards,
Michael.
#stm32cubemx #stm32cube-free-rtos-cmsis
