互斥信号量AB两个任务程序.doc

/*【文 件 名 称】main.c【功 能 描 述】互斥信号量实验代码【程 序 版 本】2.0【创建人及创建日期】昆明理工王老师/2013-12-13 16:30【修改人及修改日期】*/#include grobal.h/*任务、堆栈、优先级定义*/OS_STK Main_Task_StackSTACKSIZE_M;void Task_Main( void *Id ) ;#define Main_Task_PRIO 4OS_STK Task_A_StackSTACKSIZE_M;void Task_A( void *Id ) ;#define Task_A_PRIO 16OS_STK Task_B_StackSTACKSIZE_M;void Task_B( void *Id ) ;#define Task_B_PRIO 15OS_EVENT *LED_Mutex; /LED互斥信号量void Main(void)char Id0 = 1;U8 err;SystemInit();Delay(5000);/延时等待有效复位Led( OFF ) ;Led_Set(0x00);/关闭底板LEDUart_Printf(nn昆明理工大学.nn);OSInit();/创建LED互斥信号量LED_Mutex = OSMutexCreate(13,&err) ;if ( err != OS_NO_ERR);Uart_Printf( 创建LED_Mutex失败，错误码 %dn0, err ) ; /创建主任务OSTaskCreate(Task_Main, (void *)&Id0, (OS_STK *)&Main_Task_StackSTACKSIZE_M-1, Main_Task_PRIO);OSStart();void Task_Main(void *p_arg)char Id1 = 2;char Id2 = 3; U16 ver ;(void)p_arg;Uart_Printf(uCOS-II实时操作系统初始化.n);OSTimeSet(0); Uart_Printf(uCOS-II实时操作系统时钟设定.n); ver = OSVersion(); Uart_Printf(uCOS-II实时操作系统版本:%dn,ver); Uart_Printf(nuCOS-II实时操作系统开始运行.n); Uart_Printf(请注意串口输出及LED灯闪烁,0); Uart_Printf(注意AB两个任务之间消息传递及调度关系!nn); TimersStart();OSTimeDly(20);OSTaskCreate( Task_A, (void *)&Id1, (OS_STK *)&Task_A_StackSTACKSIZE_M-1, Task_A_PRIO);/底板LED组显示任务OSTaskCreate( Task_B, (void *)&Id2, (OS_STK *)&Task_B_StackSTACKSIZE_M-1, Task_B_PRIO );/核心板LED显示任务for( ; ; )OSTaskSuspend(OS_PRIO_SELF) ;/挂起当前任务直至其他任务或中断置起信号量/*【功能说明】A任务 */void Task_A( void *Id )U8 err;U8 iCnt = 0;U16 uCnt = 0;InitPCA9554();/PCA9554初始化while(1)OSMutexPend (LED_Mutex,0,&err);Uart_Printf( A任务运行-%dn,uCnt+ ) ;for( iCnt = 0; iCnt %dn,uCnt+ ) ;for( iCnt = 0; iCnt 3; iCnt+ )Led( OFF ) ;Delay(4000);/将任务延时若干时钟节拍Led( ON ) ;Delay(4000);/将任务延时若干时钟节拍OSMutexPost(LED_Mutex);OSTimeDlyHMSM(0,0,3,0);/*/* void EInt0Isr(void)/* Description: 外部中断0/* Argument : none /*/void EInt0Isr(void)/INT8U err; static int flag = 0;rI_ISPC = BIT_EINT0;/clear pending_bit/flag1 = 1;/OSFlagPost(LED_Flag,(OS_FLAGS)flag1,O