实验报告示例.docx

1、实验报告示例实时操作系统实验报告 专业：J通信0601 学号：3061109015姓名:蔡 智 超指导老师：李峰 实验二 任务管理实验实验目的： 1.理解任务管理的基本原理，了解任务的各个基本状态及其变迁过程；2.掌握C/OS-II 中任务管理的基本方法（挂起、解挂）；3.熟练使用C/OS-II 任务管理的基本系统调用。实验要求与思路：为了体现任务的各个基本状态及其变迁过程，本实验设计了T0、T1 和T3三个任务，它们交替运行，如图所示说明：在系统完成初始化后，可以先创建并启动优先级最低的TaskStart，由它创建其他3 个应用任务T0、T1 和T2，之后整个系统的运行流程如下：1） 优先级

2、最高的T0 开始执行，之后T0 挂起自己；2） 然后系统调度选中T1 开始执行，之后T1 挂起自己；3） 接着系统调度选中T2,之后唤醒T0；4） 如此循环实验程序:* uC/OS-II* The Real-Time Kernel* EX #1 Task Management*#include includes.h* CONSTANTS*#define TASK_STK_SIZE 512 /* Size of each tasks stacks (# of WORDs) */#define N_TASKS 2 /* Number of identical tasks * VARIABLES*/

3、OS_STK TaskStkN_TASKSTASK_STK_SIZE; /* Tasks stacks OS_STK TaskStartStkTASK_STK_SIZE; /* TaskStart task stack INT8U TaskDataN_TASKS; /* Parameters to pass to each task /* FUNCTION PROTOTYPES*/void Task0(void *pdata); /* Function prototypes of tasks */void Task1(void *pdata);void Task2(void *pdata);v

4、oid TaskStart(void *pdata); /* Function prototypes of Startup task */static void TaskStartCreateTasks(void); /* Function prototypes of creat task */static void TaskStartDispInit(void); /* Function prototypes of Initialization the display */*$PAGE*/* MAIN*/void main (void) PC_DispClrScr(DISP_FGND_WHI

5、TE + DISP_BGND_BLACK); /* Clear the screen */ OSInit(); /* Initialize uC/OS-II */ PC_DOSSaveReturn(); /* Save environment to return to DOS */ PC_VectSet(uCOS, OSCtxSw); /* Install uC/OS-IIs context switch vector */ /创建初始任务 OSTaskCreate(TaskStart, (void *)0, &TaskStartStkTASK_STK_SIZE - 1, 4); OSStar

6、t(); /* Start multitasking */* STARTUP TASK*/void TaskStart (void *pdata)#if OS_CRITICAL_METHOD = 3 /* Allocate storage for CPU status register */ OS_CPU_SR cpu_sr;#endif INT16S key; pdata = pdata; /* Prevent compiler warning */ TaskStartDispInit(); /* Initialize the display */ OS_ENTER_CRITICAL();

7、PC_VectSet(0x08, OSTickISR); /* Install uC/OS-IIs clock tick ISR */ PC_SetTickRate(OS_TICKS_PER_SEC); /* Reprogram tick rate */ OS_EXIT_CRITICAL(); OSStatInit(); /* Initialize uC/OS-IIs statistics */ TaskStartCreateTasks(); /* Create all the application tasks */ for (;) if (PC_GetKey(&key) = TRUE) /

8、* See if key has been pressed */ if (key = 0x1B) /* Yes, see if its the ESCAPE key */ PC_DOSReturn(); /* Return to DOS */ OSCtxSwCtr = 0; /* Clear context switch counter */ OSTimeDlyHMSM(0, 0, 1, 0); /* Wait one second */ /*$PAGE*/* INITIALIZE THE DISPLAY*/static void TaskStartDispInit (void)/* 1111

9、111111222222222233333333334444444444555555555566666666667777777777 */* 01234567890123456789012345678901234567890123456789012345678901234567890123456789 */ PC_DispStr( 0, 0, uC/OS-II, The Real-Time Kernel , DISP_FGND_WHITE + DISP_BGND_RED + DISP_BLINK); PC_DispStr( 0, 1, , DISP_FGND_BLACK + DISP_BGND

10、_LIGHT_GRAY); PC_DispStr( 0, 2, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 3, EXAMPLE #1 Task Management , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 4, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 5, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0,

11、6, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 7, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 8, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 9, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 10, Task0() : , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);

12、 PC_DispStr( 0, 11, Task1() : , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 12, Task2() : , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 13, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 14, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 15, , DISP_FGND_

13、BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 16, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 17, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 18, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 19, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 20, ,

14、DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 21, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 22, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 23, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 0, 24, , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY + DISP_BLINK)

15、;/* 1111111111222222222233333333334444444444555555555566666666667777777777 */* 01234567890123456789012345678901234567890123456789012345678901234567890123456789 */*$PAGE*/* CREATE TASKS*/static void TaskStartCreateTasks (void) INT8U i;INT8U err; for (i = 0; i N_TASKS; i+) /* Create tasks */ TaskDatai

16、 = i; /* Each task will display its own information */ OSTaskCreate(Task0, (void *)&TaskData0, &TaskStk0TASK_STK_SIZE - 1, 5); OSTaskCreate(Task1, (void *)&TaskData1, &TaskStk1TASK_STK_SIZE - 1, 6); OSTaskCreate(Task2, (void *)&TaskData2, &TaskStk2TASK_STK_SIZE - 1, 7); err=OSTaskSuspend(6); /* 确保每个

17、任务运行时其他任务被挂起 err=OSTaskSuspend(7); /*$PAGE*/* TASK #0* Description: This task is suspended by itself,then it will be resumed by other tasks.*/void Task0 (void *pdata) INT8U i; INT8U err; i=*(int *)pdata; for (;) PC_DispStr( 14, 10, task0 is running. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_Disp

18、Str( 14, 11, task1 is suspended. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 14, 12, task2 is suspended. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); OSTimeDly(200); err=OSTaskResume(6); err=OSTaskSuspend(5); /* suspend itself */ /*$PAGE*/* TASK #1* Description: This task resume task0*/void

19、 Task1 (void *pdata) INT8U i; INT8U err; i=*(int *)pdata; for (;) OSTimeDly(200); PC_DispStr( 14, 10, task0 is suspended. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 14, 11, task1 is running. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 14, 12, task2 is suspended. , DISP_FGND_BL

20、ACK + DISP_BGND_LIGHT_GRAY); OSTimeDly(200); err=OSTaskResume(7); /* resume task0 */ err=OSTaskSuspend(6); /*$PAGE*/* TASK #2* Description: This task resume task0*/void Task2 (void *pdata) INT8U i; INT8U err; i=*(int *)pdata; for (;) OSTimeDly(200); PC_DispStr( 14, 10, task0 is suspended. , DISP_FGN

21、D_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 14, 11, task1 is suspended. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); PC_DispStr( 14, 12, task2 is running. , DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY); OSTimeDly(200); err=OSTaskResume(5); /* resume task0 */ err=OSTaskSuspend(7); 实验截图：实验感想通过这次实验使我掌握C/OS-II 中任务管理的基本方法（挂起、解挂），首先在主函数中创建初始任务OSTaskCreate，执行OSTaskCreate后，在调用TaskStartCreateTasks ，在TaskStartCreateTasks实现3 个应用任务T0、T1 和T2循环挂起和唤醒，每个任务运行时要保证其他任务被挂起，而且要在挂起之前唤醒下一个任务。显示设置可以修改TaskStartDispInit函数或者在Task0 Task1 Task2修改。