test.c

This a simple OS for study.

/*
*********************************************************************************************************
*                                                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  TEST_TASK_STK_SIZE                 400       /* Size of each task's stacks (# of WORDs)       */

#define  TEST_N_TASKS                        10       /* Number of identical tasks                     */

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

OS_STK        TestStartStk[TEST_TASK_STK_SIZE];       /* Tasks stacks                                  */

OS_STK        TestTaskStk[TEST_N_TASKS][TEST_TASK_STK_SIZE];

OS_EVENT     *TestRandomSem;
char          TestTaskData[TEST_N_TASKS];             /* Parameters to pass to each task               */

OS_EVENT     *TestTerminalMbox;
INT16U        TestTerminalMsgCtr;
OS_STK        TestTerminalTaskStk[TEST_TASK_STK_SIZE];

INT16U        TestDly;
INT16U        TestLoops;

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

static  void  TestStart(void *data);                  /* Function prototypes of Startup task           */
static  void  TestTask(void *data);

static  void  TestTerminalCallback(INT8U data);
static  void  TestTerminalTask(void *pdata);

static  void  TestCreateTasks(void);
static  void  TestDisp(void);
static  void  TestDispInit(void);
static  void  TestDispStat(void);

static  void  TestDispTaskData(void);

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

void  main (void)
{
	INT8U  prio;
    INT8U  err;


    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 */

    printf("uC/OS-II and uC/OS-View on 80x86 (Large).\n");

    prio = 0;
    OSTaskCreateExt(TestStart, 
                    (void *)0, 
                    &TestStartStk[TEST_TASK_STK_SIZE - 1], 
                    prio,
                    prio,
                    &TestStartStk[0],
					TEST_TASK_STK_SIZE,
                    (void *)0,
                    OS_TASK_OPT_STK_CLR + OS_TASK_OPT_STK_CHK);
    OSTaskNameSet(prio, "Start Task", &err);

    OSStart();                                             /* Start multitasking                       */
}


/*
*********************************************************************************************************
*                                              STARTUP TASK
*********************************************************************************************************
*/
static  void  TestStart (void *pdata)
{
#if OS_CRITICAL_METHOD == 3                                /* Allocate storage for CPU status register */
    OS_CPU_SR  cpu_sr;
#endif
    char       s[100];
    INT16S     key;
    INT32U     cycles;


    pdata = pdata;                                         /* Prevent compiler warning                 */

    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         */

    OSView_Init();                                         /* Initialize uC/OS-View                    */

    TestTerminalMbox = OSMboxCreate((void *)0);
    OSView_TerminalRxSetCallback(TestTerminalCallback);    /* Setup Terminal callback function         */

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

    PC_DispClrScr(DISP_FGND_WHITE);

    TestDispInit();

    TestDly   = 100;
	TestLoops = 250;
    while (TRUE) {
        if (PC_GetKey(&key) == TRUE) {                     /* See if key has been pressed              */
            switch (key) {                                 
                case 0x1B:                                 /* See if it's the ESCAPE key               */
			         OSView_Exit();
                     PC_DOSReturn();                       /* Return to DOS                            */
                     break;

                case '+':                                  /* Increase task execution rate             */
                case '=':
                     if (TestDly > 10) {
                         TestDly -= 5;
                     } else if (TestDly > 0) {
                         TestDly--;
					 }
                     break;
                                                           /* Decrease task execution rate             */
                case '-':
                case '_':
                     if (TestDly < 10) {
                         TestDly++;
                     } else if (TestDly <= 95) {
					     TestDly += 5;
					 }
                     break;

                case 'U':                                  /* Increase task execution time             */ 
                case 'u':
                     if (TestLoops <= 990) {
					     TestLoops += 10;
					 }
                     break;

                case 'D':                                  /* Decrease task execution time             */
                case 'd':
                     if (TestLoops > 20) {
                         TestLoops -= 10;
					 }
                     break;
            }
        }

		TestDispStat();
        TestDispTaskData();

        PC_GetDateTime(s);
        PC_DispStr(60, 23, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);

        cycles = OSView_TimeGetCycles();
        sprintf(s, "%10lu", cycles);
        PC_DispStr(60, 24, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);

        OSTimeDly(OS_TICKS_PER_SEC / 10);
    }
}

/*$PAGE*/
/*
*********************************************************************************************************
*                             HANDLE VIEWER's TERMINAL WINDOW KEYSTROKES
*
* Note(s): This function is called from an ISR.
*********************************************************************************************************
*/

static  void  TestTerminalCallback (INT8U data)
{
    OSMboxPost(TestTerminalMbox, (char *)data);
}


/*
*********************************************************************************************************
*                             HANDLE VIEWER's TERMINAL WINDOW KEYSTROKES
*********************************************************************************************************
*/

static  void  TestTerminalTask (void *pdata)
{
#if OS_CRITICAL_METHOD == 3                                /* Allocate storage for CPU status register */
    OS_CPU_SR  cpu_sr;
#endif
    char       s[100];
    char       key;
    INT8U      err;


    pdata = pdata;                                         /* Prevent compiler warning                 */
    while (TRUE) {
        key = (char)OSMboxPend(TestTerminalMbox, 0, &err);
        TestTerminalMsgCtr++;
        sprintf(s, "%05u", TestTerminalMsgCtr);
        PC_DispStr(60, 22, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
        switch (key) {
            case '1':
                 sprintf(s, "\nCPU Usage = %3u%%\n", OSCPUUsage);
                 OSView_TxStr(s, 1);
                 break;

            case '2':
                 sprintf(s, "\n#Tasks    = %3u\n", OSTaskCtr);
                 OSView_TxStr(s, 1);
                 break;

            default:
                 OSView_TxStr("\n\nMicrium, Inc.",       1);
                 OSView_TxStr("\n1: CPU Usage (%)",      1);
                 OSView_TxStr("\n2: #Tasks",             1);
                 OSView_TxStr("\n?: Help (This menu)\n", 1);
                 break;
        }
    }
}

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

static  void  TestCreateTasks (void)
{
	INT8U  prio;
    INT8U  err;
    INT8U  i;
    char   s[20];


    prio = 1;
    OSTaskCreateExt(TestTerminalTask,                      /* uC/OS-View Terminal task                 */
                    (void *)0, 
                    &TestTerminalTaskStk[TEST_TASK_STK_SIZE - 1], 
                    prio,
                    prio,
                    &TestTerminalTaskStk[0],
				    TEST_TASK_STK_SIZE,
                    (void *)0,
                    OS_TASK_OPT_STK_CLR + OS_TASK_OPT_STK_CHK);
    OSTaskNameSet(prio, "uC/OS-View Terminal", &err);

    for (i = 0; i < TEST_N_TASKS; i++) {
        sprintf(s, "Task #%2d", i + 1);
        TestTaskData[i] = '0' + i;                         /* Each task will display its own letter    */
        prio            = i + 2;
        OSTaskCreateExt(TestTask, 
                        (void *)&TestTaskData[i], 
                        &TestTaskStk[i][TEST_TASK_STK_SIZE - 1], 
                        prio,
                        prio,
                        &TestTaskStk[i][0],
					    TEST_TASK_STK_SIZE,
                        (void *)0,
                        OS_TASK_OPT_STK_CLR + OS_TASK_OPT_STK_CHK);
        OSTaskNameSet(prio, s, &err);