#include "cmsis_os2.h" // CMSIS RTOS header file /*---------------------------------------------------------------------------- * Message Queue creation & usage *---------------------------------------------------------------------------*/ #define MSGQUEUE_OBJECTS 16 // number of Message Queue Objects typedef struct { // object data type uint8_t Buf[32]; uint8_t Idx; } MSGQUEUE_OBJ_t; osMessageQueueId_t mid_MsgQueue; // message queue id osThreadId_t tid_Thread_MsgQueue1; // thread id 1 osThreadId_t tid_Thread_MsgQueue2; // thread id 2 void Thread_MsgQueue1 (void *argument); // thread function 1 void Thread_MsgQueue2 (void *argument); // thread function 2 int Init_MsgQueue (void) { mid_MsgQueue = osMessageQueueNew(MSGQUEUE_OBJECTS, sizeof(MSGQUEUE_OBJ_t), NULL); if (mid_MsgQueue == NULL) { ; // Message Queue object not created, handle failure } tid_Thread_MsgQueue1 = osThreadNew(Thread_MsgQueue1, NULL, NULL); if (tid_Thread_MsgQueue1 == NULL) { return(-1); } tid_Thread_MsgQueue2 = osThreadNew(Thread_MsgQueue2, NULL, NULL); if (tid_Thread_MsgQueue2 == NULL) { return(-1); } return(0); } void Thread_MsgQueue1 (void *argument) { MSGQUEUE_OBJ_t msg; while (1) { ; // Insert thread code here... msg.Buf[0] = 0x55U; // do some work... msg.Idx = 0U; osMessageQueuePut(mid_MsgQueue, &msg, 0U, 0U); osThreadYield(); // suspend thread } } void Thread_MsgQueue2 (void *argument) { MSGQUEUE_OBJ_t msg; osStatus_t status; while (1) { ; // Insert thread code here... status = osMessageQueueGet(mid_MsgQueue, &msg, NULL, 0U); // wait for message if (status == osOK) { ; // process data } } }