test.c

基于ucos的网络液晶开发程序

/*
*********************************************************************************************************
*                                                uC/OS-II
*                                          The Real-Time Kernel
*
*                           (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
*                                           All Rights Reserved
*
*                                               EXAMPLE #1
*********************************************************************************************************
*/

#include "includes.h"

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

#define  TASK_STK_SIZE                 512       /* Size of each task's stacks (# of WORDs)            */
#define  N_TASKS                        10       /* Number of identical tasks                          */

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

OS_STK        TaskStk[N_TASKS][TASK_STK_SIZE];        /* Tasks stacks                                  */
OS_STK        TaskStartStk[TASK_STK_SIZE];
char          TaskData[N_TASKS];                      /* Parameters to pass to each task               */
OS_EVENT     *RandomSem;

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

        void  Task(void *data);                       /* Function prototypes of tasks                  */
        void  TaskStart(void *data);                  /* Function prototypes of Startup task           */
static  void  TaskStartCreateTasks(void);
static  void  TaskStartDispInit(void);
static  void  TaskStartDisp(void);

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

void  main (void)
{
    PC_DispClrScr(DISP_FGND_WHITE + 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-II's context switch vector */

    RandomSem   = OSSemCreate(1);                          /* Random number semaphore                  */

    OSTaskCreate(TaskStart, (void *)0, &TaskStartStk[TASK_STK_SIZE - 1], 0);
    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
    char       s[100];
    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)
{
    PC_DispStr( 0,  0, "  UC/OS-II DEMO   ", DISP_FGND_WHITE + DISP_BGND_RED + DISP_BLINK);
    PC_DispStr( 0,  1, "   EXAMPLE #1     ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
    PC_DispStr( 0,  2, "                  ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
    PC_DispStr( 0,  3, "                  ", 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);
}

/*$PAGE*/
/*
*********************************************************************************************************
*                                           UPDATE THE DISPLAY
*********************************************************************************************************
*/

static  void  TaskStartDisp (void)
{
    char   s[80];


    sprintf(s, "Tasks:%d", OSTaskCtr);                                  /* Display #tasks running               */
    PC_DispStr(0, 6, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);

#if OS_TASK_STAT_EN > 0
    sprintf(s, "CPU:%d%", OSCPUUsage);                                 /* Display CPU usage in %               */
    PC_DispStr(9, 6, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
#endif

    //sprintf(s, "%d", OSCtxSwCtr);                                 /* Display #context switches per second */
    //PC_DispStr(0, 6, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);

    sprintf(s, "V%1d.%02d", OSVersion() / 100, OSVersion() % 100); /* Display uC/OS-II's version number    */
    PC_DispStr(0, 7, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);

    switch (_8087) {                                               /* Display whether FPU present          */
	case 0:
	     PC_DispStr(9, 7, "NO FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
	     break;

	case 1:
	     PC_DispStr(9, 7, "8087 FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
	     break;

	case 2:
	     PC_DispStr(9, 7, "80287 FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
	     break;

	case 3:
	     PC_DispStr(9, 7, "80387 FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
	     break;
    }
}

/*$PAGE*/
/*
*********************************************************************************************************
*                                             CREATE TASKS
*********************************************************************************************************
*/

static  void  TaskStartCreateTasks (void)
{
    INT8U  i;


    for (i = 0; i < N_TASKS; i++) {                        /* Create N_TASKS identical tasks           */
	TaskData[i] = '0' + i;                             /* Each task will display its own letter    */
	OSTaskCreate(Task, (void *)&TaskData[i], &TaskStk[i][TASK_STK_SIZE - 1], i + 1);
    }
}

/*
*********************************************************************************************************
*                                                  TASKS
*********************************************************************************************************
*/

void  Task(void *pdata)
{
    INT8U  x;
    INT8U  y;
    INT8U  err;


    for (;;) {
	OSSemPend(RandomSem, 0, &err);           /* Acquire semaphore to perform random numbers        */
	x = random(16);                          /* Find X position where task number will appear      */
	y = random(2)+3;                          /* Find Y position where task number will appear      */
	OSSemPost(RandomSem);                    /* Release semaphore                                  */
						 /* Display the task number on the screen              */
	PC_DispChar(x, y, *(char *)pdata, DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
	OSTimeDly(2);                            /* Delay 1 clock tick                                 */
    }
}