message queue

/*----------------------------------------------------------------------------

    Designers Guide to the Cortex-M Family
    CMSIS RTOS Message Queue Example

*----------------------------------------------------------------------------*/
#include "STM32F10x.h"
#include "cmsis_os.h"

#include "Board_LED.h"

osMessageQId Q_LED;                                                                     //define the message queue
osMessageQDef (Q_LED,0x16,unsigned char);
osEvent  result;


void led_Thread1 (void const *argument);                                                                
void led_Thread2 (void const *argument);

osThreadDef(led_Thread1, osPriorityAboveNormal, 1, 0);
osThreadDef(led_Thread2, osPriorityNormal, 1, 0);

osThreadId T_led_Thread1;
osThreadId T_led_Thread2;
osThreadId  T_main; 



/*----------------------------------------------------------------------------
    Task 2 'ledOff': switches the LED off
 *---------------------------------------------------------------------------*/
void led_Thread1 (void const *argument) 
{
    for (;;) 
    {
        result =    osMessageGet(Q_LED,osWaitForever);              //wait for a message to arrive
        LED_On(result.value.v);                                 // write the data to the LED's
    }
}
/*----------------------------------------------------------------------------
    Task 1 'ledOn': switches the LED on
 *---------------------------------------------------------------------------*/
void led_Thread2 (void const *argument) 
{
    for (;;) 
    {
        osMessagePut(Q_LED,1,osWaitForever);             //Place a value in the message queue
        osDelay(100);                                                                               //Wait 100 ms
        LED_Off(0x01);                                                                          //switch off the LED
        osMessagePut(Q_LED,2,osWaitForever);                            //Repeat for other bit patterns
        osDelay(100);
        LED_Off(0x02);
        osMessagePut(Q_LED,3,osWaitForever);
        osDelay(100);
        LED_Off(0x03);
        osMessagePut(Q_LED,4, osWaitForever);
        osDelay(100);
        LED_Off(0x04);
    }
}

/*----------------------------------------------------------------------------
    Main: Initialize and start RTX Kernel
 *---------------------------------------------------------------------------*/

int main (void) 
{
    osKernelInitialize ();                                          // initialize CMSIS-RTOS

    LED_Initialize ();
    Q_LED = osMessageCreate(osMessageQ(Q_LED),NULL);                    //create the message queue
    T_led_Thread1 = osThreadCreate(osThread(led_Thread1), NULL);
    T_led_Thread2 = osThreadCreate(osThread(led_Thread2), NULL);

    osKernelStart ();                                               // start thread execution 
}