inter.c

ucosii小实验任务五 时钟中断

/*
*********************************************************************************************************
*                                                uC/OS-II
*                                          The Real-Time Kernel
*********************************************************************************************************
*/

#include "C:\SOFTWARE\uCOS-II\interrupt\includes.h"

/*
*********************************************************************************************************
*                                              CONSTANTS
*********************************************************************************************************
*/

#define          TASK_STK_SIZE     512                /* Size of each task's stacks (# of WORDs)       */

#define          TASK_START_ID       0                /* Application tasks IDs                         */
#define          TASK_CLK_ID         1
#define          TASK_1_ID           2
#define          TASK_2_ID           3
#define          TASK_3_ID           4


#define          TASK_START_PRIO    10                /* Application tasks priorities                  */
#define          TASK_CLK_PRIO      11
#define          TASK_1_PRIO        12
#define          TASK_2_PRIO        13
#define          TASK_3_PRIO        14


/*
*********************************************************************************************************
*                                              VARIABLES
*********************************************************************************************************
*/

OS_STK        TaskStartStk[TASK_STK_SIZE];            /* Startup    task stack                         */
OS_STK        TaskClkStk[TASK_STK_SIZE];              /* Clock      task stack                         */
OS_STK        Task1Stk[TASK_STK_SIZE];                /* Task #1    task stack                         */
OS_STK        Task2Stk[TASK_STK_SIZE];                /* Task #2    task stack                         */
OS_STK        Task3Stk[TASK_STK_SIZE];                /* Task #3    task stack                         */
OS_EVENT      *InterruptSem;


/*
*********************************************************************************************************
*                                         FUNCTION PROTOTYPES
*********************************************************************************************************
*/

		  void  TaskStart(void *data);                  /* Function prototypes of tasks                  */
static  void  TaskStartCreateTasks(void);
static  void  TaskStartDispInit(void);
static  void  TaskStartDisp(void);
		  void  TaskClk(void *data);
		  void  Task1(void *data);
		  void  Task2(void *data);
		  void  Task3(void *data);

/*$PAGE*/
/*
*********************************************************************************************************
*                                                  MAIN
*********************************************************************************************************
*/

void main (void)
{
    OS_STK *ptos;
    OS_STK *pbos;
    INT32U  size;


    PC_DispClrScr(DISP_FGND_WHITE);                        /* Clear the screen                         */

	 OSInit();                                              /* Initialize uC/OS-II                      */

	 InterruptSem=OSSemCreate(1);

    PC_DOSSaveReturn();                                    /* Save environment to return to DOS        */
    PC_VectSet(uCOS, OSCtxSw);                             /* Install uC/OS-II's context switch vector */

    ptos        = &TaskStartStk[TASK_STK_SIZE - 1];        /* TaskStart() will use Floating-Point      */
    pbos        = &TaskStartStk[0];
    size        = TASK_STK_SIZE;
    OSTaskStkInit_FPE_x86(&ptos, &pbos, &size);            
	 OSTaskCreateExt(TaskStart,
						 (void *)0,
                   ptos,
                   TASK_START_PRIO,
                   TASK_START_ID,
                   pbos,
                   size,
                   (void *)0,
                   OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);

    OSStart();                                             /* 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();
	 PC_VectSet(0x08, OSTickISR);                           /* Install uC/OS-II's clock tick ISR        */
	 PC_SetTickRate(OS_TICKS_PER_SEC);                      /* Reprogram tick rate                      */
	 OS_EXIT_CRITICAL();

	 OSStatInit();                                          /* Initialize uC/OS-II's statistics         */

	 TaskStartCreateTasks();                                /* Create all the application tasks         */

	 for (;;) {
		  TaskStartDisp();                                  /* Update the display                       */


		  if (PC_GetKey(&key) == TRUE) {                     /* See if key has been pressed              */
				if (key == 0x1B) {                             /* Yes, see if it's 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)
{
/*                                1111111111222222222233333333334444444444555555555566666666667777777777 */
/*                      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_LIGHT_GRAY);
	 PC_DispStr( 0,  2, "                                                                                ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
	 PC_DispStr( 0,  3, "                            Example #5  Interrupt                               ", 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,  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, "                                                                                ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
	 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, "Task3()    :                                                                    ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
	 PC_DispStr( 0, 14, "                                                                                ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
	 PC_DispStr( 0, 15, "                                                                                ", DISP_FGND_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, "                                                                                ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);