嵌入式 事件标志组编程

1、2.2 题目组合2 程序设计题目-大事标志组编程 目标：设计三个任务，当时间到且独立按健被按下过，让LED闪烁一下。设LED任务为高优先级任务，三个任务的处理流程如图。下面是三个任务的处理流程。主任务：无条件挂起一个任务，之后建立两个子任务（任务A与任务B），设置任务B为高优先级任务。以两组信号量（低位标志与次低位标志）组成之间标志组，完成程序设计。任务A： void Task_A(void *p_arg)INT8U err;while(1)OSTimeDly(100);OSFlagPost(LED_Flag,(OS_FLAGS)2,OS_FLAG_SET,&err);if(err !

2、= OS_NO_ERR)Uart_Printf("Task_A大事标志组失败,错误码%dn",err);elseUart_Printf("发送标志位rn");任务Bvoid Task_B(void *p_arg)INT8U err;while(1) OSFlagPend(LED_Flag,(OS_FLAGS)3,OS_FLAG_WAIT_SET_AND | OS_FLAG_CONSUME,0,&err);Uart_Printf("LED亮rn");Led(ON);OSTimeDly(100);Led(OFF);OSTimeDl

3、y(100);Uart_Printf("LED灭 试验成功rn");中断任务void EInt0Isr(void)INT8U err; rI_ISPC = BIT_EINT0;OSIntEnter();Uart_Printf("发送按键中断rn");OSFlagPost(LED_Flag,(OS_FLAGS)1,OS_FLAG_SET,&err);Uart_Printf("发送低位标志rn");OSIntExit();Uart_Printf("退出按键中断rn");试验程序#include "gr

4、obal.h"/*任务、堆栈、优先级定义*/OS_STK Task_Start_StackSTACKSIZE_M;void Task_Start( void *Id ) ;#define Task_Start_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_FLAG_GRP *LED_Flag; /LED大

5、事标志组void Main(void)char Id0 = '1'U8 err;SystemInit();Delay(5000);/延时等待有效复位Led( OFF ) ;OSInit();/创建LED大事标志组LED_Flag = OSFlagCreate(0,&err); if(err != OS_NO_ERR) Uart_Printf("创建LED_Flag大事标志组失败,错误码%dn",err); OSTaskCreate(Task_Start, (void *)&Id0, (void *)&Task_Start_StackS

6、TACKSIZE_L - 1, Task_Start_PRIO);OSStart();void Task_Start(void *p_arg)char Id1 = '2'char Id2 = '3' U16 ver ;(void)p_arg;Uart_Printf("nn考核题2.nn");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_

7、Printf("uCOS-II实时操作系统版本:%dn",ver); TimersStart();OSTimeDly(20);OSTaskCreate( Task_A, (void *)&Id1, (void *)&Task_A_StackSTACKSIZE_M-1, Task_A_PRIO); OSTaskCreate( Task_B, (void *)&Id2, (void *)&Task_B_StackSTACKSIZE_M-1, Task_B_PRIO ) ; while(1)OSTaskSuspend(OS_PRIO_SELF);/

8、*【功能说明】A任务*/void Task_A(void *p_arg)INT8U err;while(1)OSTimeDly(100);OSFlagPost(LED_Flag,(OS_FLAGS)2,OS_FLAG_SET,&err);if(err != OS_NO_ERR)Uart_Printf("Task_A大事标志组失败,错误码%dn",err);elseUart_Printf("发送标志位rn");/*【功能说明】B任务 */void Task_B(void *p_arg)INT8U err;while(1) OSFlagPend(LE

9、D_Flag,(OS_FLAGS)3,OS_FLAG_WAIT_SET_AND | OS_FLAG_CONSUME,0,&err);Uart_Printf("LED亮rn");Led(ON);OSTimeDly(100);Led(OFF);OSTimeDly(100);Uart_Printf("LED灭 试验成功rn");/*/* void EInt0Isr(void)/* Description: 外部中断0/* Argument : none /*/void EInt0Isr(void)INT8U err; rI_ISPC = BIT_EINT0;OSIntEnter();Uart_Printf("发送按键中断rn")