bug in cmsisOS api wrapper for FreeRTOS

STM32Cube from ST micro provides project code generation for FreeRTOS along with a wrapper dedicated to use of the CMSIS-OS API. Nevertheless, it seems that this wrapper is brocken regarding the FreeRTOS API function “vTaskDelayUntil()” wich is wrapped to “osDelayUntil()” according to the following code from cmsisos.c: ~~~~~~ /** * @brief Delay a task until a specified time * @param PreviousWakeTime Pointer to a variable that holds the time at which the * task was last unblocked. * @param millisec time delay value * @retval status code that indicates the execution status of the function. */ osStatus osDelayUntil (uint32t PreviousWakeTime, uint32_t millisec) {

if INCLUDE_vTaskDelayUntil

portTickType ticks = (millisec / portTICKRATEMS); portTickType previouswake = (portTickType) PreviousWakeTime; vTaskDelayUntil(&previouswake, ticks ? ticks : 1); return osOK;


(void) millisec; (void) PreviousWakeTime; return osErrorResource;


} ~~~~~~ In the freeRTOS API, the first argument of this function is a pointer to a variable that holds the time at which the task was last unblocked and this variable is automatically updated within vTaskDelayUntil(). Nevertheless, as you can note, the wrapper don’t use a pointer anymore. That is, the local variable couldn’t be updated anymore and the function is unusable. I’m not sure that it is the right place for reporting it, but I don’t know where to do so… Many thanks in advance for your help. Best regards, BaDuf

bug in cmsisOS api wrapper for FreeRTOS

Thanks for reporting this – we have not been involved in creating the wrapper but I will bring it to ST’s attention for you. Regards.