?? test.c
字號(hào):
/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
* (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
* All Rights Reserved
*
* EXAMPLE #2
*
* Notes: 1) You can run this code on a PC running DOS 4.xx
* 2) This test file has been tested on the JK Microsystems, Inc. uFlashTCP board which contains
* contains an Intel 80386 CPU running at 25 MHz. The board doesn't come with a VGA display
* controller but you can write to the console port (COM2) using 'printf' statements. The
* console keyboard simulates a PC's keyboard.
*********************************************************************************************************
*/
#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 */
INT16U TestDly;
INT16U TestLoops;
/*
*********************************************************************************************************
* FUNCTION PROTOTYPES
*********************************************************************************************************
*/
static void TestStart(void *data); /* Function prototypes of Startup task */
static void TestTask(void *data);
static void TestCreateTasks(void);
static void TestDisp(void);
/*$PAGE*/
/*
*********************************************************************************************************
* MAIN
*********************************************************************************************************
*/
void main (void)
{
INT8U err;
INT8U prio;
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;
INT16U ctr;
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 */
TestCreateTasks(); /* Create all the application tasks */
PC_DispClrScr(DISP_FGND_WHITE);
TestDly = 100;
TestLoops = 10;
ctr = 0;
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 > 10) {
TestLoops -= 10;
}
break;
}
}
printf("%05u #Tasks:%2u %%CPU:%3u Dly:%3u Loops:%3u\n", ctr, OSTaskCtr, OSCPUUsage, TestDly, TestLoops);
ctr++;
OSTimeDly(OS_TICKS_PER_SEC);
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* CREATE TASKS
*********************************************************************************************************
*/
static void TestCreateTasks (void)
{
INT8U err;
INT8U prio;
INT8U i;
char s[20];
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 + 1;
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);
}
}
/*
*********************************************************************************************************
* TASK #1
*********************************************************************************************************
*/
static void TestTask (void *pdata)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
INT8U x;
INT8U y;
INT8U err;
INT16U i;
pdata = pdata; /* Prevent compiler warning */
while (TRUE) {
OSSemPend(TestRandomSem, 0, &err); /* Acquire semaphore to perform random numbers */
if (OSTCBCur->OSTCBPrio == 1) { /* Consume more processing time for task prio. #1 */
for (i = 0; i < TestLoops * 5; i++) {
x = random(80); /* Waste time by getting a random number */
y = random(10);
}
} else {
for (i = 0; i < TestLoops; i++) {
x = random(80); /* Waste time by getting a random number */
y = random(10);
}
}
OSSemPost(TestRandomSem); /* Release semaphore */
/* Display the task number on the screen */
OSTimeDly(TestDly);
}
}
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