ucosII之互斥信号量

#include "task_in.h"
#ifdef OS_MUTEX
/*
                                       // ---------------- MUTUAL EXCLUSION SEMAPHORES ---------------
#define OS_MUTEX_EN               1    // Enable (1) or Disable (0) code generation for MUTEX         
#define OS_MUTEX_ACCEPT_EN        1    //     Include code for OSMutexAccept()                        
#define OS_MUTEX_DEL_EN           1    //     Include code for OSMutexDel()                           
#define OS_MUTEX_QUERY_EN         1    //     Include code for OSMutexQuery()                         

在os_cfg.h中，将上述编译开关打开                      
*/

#define MUTEX_PRIO 7
OS_EVENT *mutex;
void led();

void task1(void *pdata)
{
 INT8U err;
 pdata=pdata;
 mutex=OSMutexCreate(MUTEX_PRIO,&err);
 while(1)
 {
  led();
  OSTimeDly(1000);
 }
}

void task2(void *pdata)
{
 pdata=pdata;
 while(1)
 {
  led();
  OSTimeDly(2000);
 }
}

void task3(void *pdata)
{
 pdata=pdata;
 while(1)
 {
  OSTimeDly(1000);
 }
}

void led()
{
 INT8U err;
 OSMutexPend(mutex,0,&err);
 Led_Ctl(LED_RUN,1);
 OSTimeDly(100);
    Led_Ctl(LED_RUN,0);
 OSTimeDly(200);
 OSMutexPost(mutex);
 
}

 

 

 

#endif