www.pudn.com > ucos_vc0.1.rar > 0122.c
/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
* (c) Copyright 1992-2002, Jean J. Labrosse, Weston, FL
* All Rights Reserved
*
* EXAMPLE #2
*********************************************************************************************************
*/
#include "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_4_ID 5
#define TASK_5_ID 6
#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
#define TASK_4_PRIO 15
#define TASK_5_PRIO 16
/*
*********************************************************************************************************
* 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_STK Task4Stk[TASK_STK_SIZE]; /* Task #4 task stack */
OS_STK Task5Stk[TASK_STK_SIZE]; /* Task #5 task stack */
OS_EVENT *AckMbox; /* Message mailboxes for Tasks #4 and #5 */
OS_EVENT *TxMbox;
/*
*********************************************************************************************************
* 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);
void Task4(void *data);
void Task5(void *data);
/*$PAGE*/
/*
*********************************************************************************************************
* MAIN
*********************************************************************************************************
*/
int main(int argc, char **argv)
{
OS_STK *ptos;
OS_STK *pbos;
INT32U size;
VCInit(); /* Initialize VC */
OSInit(); /* Initialize uC/OS-II */
// PC_DOSSaveReturn(); /* Save environment to return to DOS */
// PC_VectSet(uCOS, OSCtxSw); /* Install uC/OS-II's context switch vector */
// PC_ElapsedInit(); /* Initialized elapsed time measurement */
ptos = &TaskStartStk[TASK_STK_SIZE - 1]; /* TaskStart() will use Floating-Point */
pbos = &TaskStartStk[0];
size = TASK_STK_SIZE;
OSTaskStkInit_FPE_x86(&ptos, &pbos, &size);
OSTaskCreateExt(TaskStart,
(void *)0,
ptos,
TASK_START_PRIO,
TASK_START_ID,
pbos,
size,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSStart(); /* Start multitasking */
}
/*$PAGE*/
//在VC环境下是必须的
void VCInit(void)
{
HANDLE cp,ct;
Context.ContextFlags = CONTEXT_CONTROL;
cp = GetCurrentProcess(); //得到当前进程句柄
ct = GetCurrentThread(); //得到当前线程伪句柄
DuplicateHandle(cp, ct, cp, &mainhandle, 0, TRUE, 2); //伪句柄转换,得到线程真句柄
}
/*
*********************************************************************************************************
* 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(); /* Setup the display */
OS_ENTER_CRITICAL(); /* Install uC/OS-II's clock tick ISR */
PC_VectSet(0x08, OSTickISR);
PC_SetTickRate(OS_TICKS_PER_SEC); /* Reprogram tick rate */
OS_EXIT_CRITICAL();
OSStatInit(); /* Initialize uC/OS-II's statistics */
AckMbox = OSMboxCreate((void *)0); /* Create 2 message mailboxes */
TxMbox = OSMboxCreate((void *)0);
TaskStartCreateTasks(); /* Create all other tasks */
for (;;) {
TaskStartDisp(); /* Update the display */
if (PC_GetKey(&key)) { /* See if key has been pressed */
if (key == 0x1B) { /* Yes, see if it's the ESCAPE key */
PC_DOSReturn(); /* Yes, return to DOS */
}
}
OSCtxSwCtr = 0; /* Clear context switch counter */
OSTimeDly(OS_TICKS_PER_SEC); /* 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, " Jean J. Labrosse ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 2, " ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 3, " EXAMPLE #2 ", 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, "Task Total Stack Free Stack Used Stack ExecTime (uS) ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 10, "------------- ----------- ---------- ---------- ------------- ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 11, " ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 12, "TaskStart(): ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 13, "TaskClk() : ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 14, "Task1() : ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 15, "Task2() : ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 16, "Task3() : ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 17, "Task4() : ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 18, "Task5() : ", 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);
PC_DispStr( 0, 21, " ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 22, "#Tasks : CPU Usage: % ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 23, "#Task switch/sec: ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 24, " <-PRESS 'ESC' TO QUIT-> ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY + DISP_BLINK);
/* 1111111111222222222233333333334444444444555555555566666666667777777777 */
/* 01234567890123456789012345678901234567890123456789012345678901234567890123456789 */
}
/*$PAGE*/
/*
*********************************************************************************************************
* UPDATE THE DISPLAY
*********************************************************************************************************
*/
static void TaskStartDisp (void)
{
char s[80];
sprintf(s, "%5d", OSTaskCtr); /* Display #tasks running */
PC_DispStr(18, 22, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
sprintf(s, "%3d", OSCPUUsage); /* Display CPU usage in % */
PC_DispStr(36, 22, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
sprintf(s, "%5d", OSCtxSwCtr); /* Display #context switches per second */
PC_DispStr(18, 23, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
sprintf(s, "V%4.2f", (float)OSVersion() * 0.01); /* Display uC/OS-II's version number */
PC_DispStr(75, 24, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
switch (_8087) { /* Display whether FPU present */
case 0:
PC_DispStr(71, 22, " NO FPU ", DISP_FGND_YELLOW + DISP_BGND_BLUE);
break;
case 1:
PC_DispStr(71, 22, " 8087 FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
break;
case 2:
PC_DispStr(71, 22, "80287 FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
break;
case 3:
PC_DispStr(71, 22, "80387 FPU", DISP_FGND_YELLOW + DISP_BGND_BLUE);
break;
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* CREATE TASKS
*********************************************************************************************************
*/
static void TaskStartCreateTasks (void)
{
OSTaskCreateExt(TaskClk,
(void *)0,
&TaskClkStk[TASK_STK_SIZE - 1],
TASK_CLK_PRIO,
TASK_CLK_ID,
&TaskClkStk[0],
TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task1,
(void *)0,
&Task1Stk[TASK_STK_SIZE - 1],
TASK_1_PRIO,
TASK_1_ID,
&Task1Stk[0],
TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task2,
(void *)0,
&Task2Stk[TASK_STK_SIZE - 1],
TASK_2_PRIO,
TASK_2_ID,
&Task2Stk[0],
TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task3,
(void *)0,
&Task3Stk[TASK_STK_SIZE - 1],
TASK_3_PRIO,
TASK_3_ID,
&Task3Stk[0],
TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task4,
(void *)0,
&Task4Stk[TASK_STK_SIZE-1],
TASK_4_PRIO,
TASK_4_ID,
&Task4Stk[0],
TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
OSTaskCreateExt(Task5,
(void *)0,
&Task5Stk[TASK_STK_SIZE-1],
TASK_5_PRIO,
TASK_5_ID,
&Task5Stk[0],
TASK_STK_SIZE,
(void *)0,
OS_TASK_OPT_STK_CHK | OS_TASK_OPT_STK_CLR);
}
/*$PAGE*/
/*
*********************************************************************************************************
* TASK #1
*
* Description: This task executes every 100 mS and measures the time it task to perform stack checking
* for each of the 5 application tasks. Also, this task displays the statistics related to
* each task's stack usage.
*********************************************************************************************************
*/
void Task1 (void *pdata)
{
INT8U err;
OS_STK_DATA data; /* Storage for task stack data */
INT16U time; /* Execution time (in uS) */
INT8U i;
char s[80];
pdata = pdata;
for (;;) {
for (i = 0; i < 7; i++) {
PC_ElapsedStart();
err = OSTaskStkChk(TASK_START_PRIO + i, &data);
time = PC_ElapsedStop();
if (err == OS_NO_ERR) {
sprintf(s, "%4ld %4ld %4ld %6d",
data.OSFree + data.OSUsed,
data.OSFree,
data.OSUsed,
time);
PC_DispStr(19, 12 + i, s, DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
}
}
OSTimeDlyHMSM(0, 0, 0, 100); /* Delay for 100 mS */
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* TASK #2
*
* Description: This task displays a clockwise rotating wheel on the screen.
*********************************************************************************************************
*/
void Task2 (void *data)
{
data = data;
for (;;) {
PC_DispChar(70, 15, '|', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(10);
PC_DispChar(70, 15, '/', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(10);
PC_DispChar(70, 15, '-', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(10);
PC_DispChar(70, 15, '\\', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(10);
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* TASK #3
*
* Description: This task displays a counter-clockwise rotating wheel on the screen.
*
* Note(s) : I allocated 500 bytes of storage on the stack to artificially 'eat' up stack space.
*********************************************************************************************************
*/
void Task3 (void *data)
{
char dummy[500];
INT16U i;
data = data;
for (i = 0; i < 499; i++) { /* Use up the stack with 'junk' */
dummy[i] = '?';
}
for (;;) {
PC_DispChar(70, 16, '|', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(20);
PC_DispChar(70, 16, '\\', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(20);
PC_DispChar(70, 16, '-', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(20);
PC_DispChar(70, 16, '/', DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(20);
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* TASK #4
*
* Description: This task sends a message to Task #5. The message consist of a character that needs to
* be displayed by Task #5. This task then waits for an acknowledgement from Task #5
* indicating that the message has been displayed.
*********************************************************************************************************
*/
void Task4 (void *data)
{
char txmsg;
INT8U err;
data = data;
txmsg = 'A';
for (;;) {
OSMboxPost(TxMbox, (void *)&txmsg); /* Send message to Task #5 */
OSMboxPend(AckMbox, 0, &err); /* Wait for acknowledgement from Task #5 */
txmsg++; /* Next message to send */
if (txmsg == 'Z') {
txmsg = 'A'; /* Start new series of messages */
}
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* TASK #5
*
* Description: This task displays messages sent by Task #4. When the message is displayed, Task #5
* acknowledges Task #4.
*********************************************************************************************************
*/
void Task5 (void *data)
{
char *rxmsg;
INT8U err;
data = data;
for (;;) {
rxmsg = (char *)OSMboxPend(TxMbox, 0, &err); /* Wait for message from Task #4 */
PC_DispChar(70, 18, *rxmsg, DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDlyHMSM(0, 0, 1, 0); /* Wait 1 second */
OSMboxPost(AckMbox, (void *)1); /* Acknowledge reception of msg */
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* CLOCK TASK
*********************************************************************************************************
*/
void TaskClk (void *data)
{
char s[40];
data = data;
for (;;) {
PC_GetDateTime(s);
PC_DispStr(60, 23, s, DISP_FGND_YELLOW + DISP_BGND_BLUE);
OSTimeDly(OS_TICKS_PER_SEC);
}
}