?? philo.c
字號:
/*
*********************************************************************************************************
* uC/OS-II
* The Real-Time Kernel
*
*
*
* EXAMPLE #3
*********************************************************************************************************
*/
#include "C:\SOFTWARE\uCOS-II\philosophers\includes.h"
/*
*********************************************************************************************************
* CONSTANTS
*********************************************************************************************************
*/
#define TASK_STK_SIZE 512 /* Size of each task's stacks (# of WORDs) */
#define N_TASKS 5 /* Number of identical tasks */
/*
*********************************************************************************************************
* VARIABLES
*********************************************************************************************************
*/
OS_STK TaskStk[N_TASKS][TASK_STK_SIZE]; /* Tasks stacks */
OS_STK TaskStartStk[TASK_STK_SIZE];
INT8U TaskData[N_TASKS]; /* Parameters to pass to each task */
OS_EVENT *fork[N_TASKS]; /* 5 tasks semaphore*/
/*
*********************************************************************************************************
* FUNCTION PROTOTYPES
*********************************************************************************************************
*/
void Task(void *pdata); /* Function prototypes of tasks */
void TaskStart(void *pdata); /* Function prototypes of Startup task */
static void TaskStartCreateTasks(void);
static void TaskStartDispInit(void);
static void TASK_Thinking_To_Hungry(INT8U);
static void TASK_Eat(INT8U);
/*$PAGE*/
/*
*********************************************************************************************************
* MAIN
*********************************************************************************************************
*/
void main (void)
{
INT8U i;
PC_DispClrScr(DISP_FGND_WHITE + DISP_BGND_BLACK); /* Clear the screen */
OSInit(); /* Initialize uC/OS-II */
PC_DOSSaveReturn(); /* Save environment to return to DOS */
PC_VectSet(uCOS, OSCtxSw); /* Install uC/OS-II's context switch vector */
for (i=0 ;i<N_TASKS;i++ )
{
fork[i] = OSSemCreate(1);
}
OSTaskCreate(TaskStart, (void *)0, &TaskStartStk[TASK_STK_SIZE - 1], 0);
OSStart(); /* Start multitasking */
}
/*
*********************************************************************************************************
* STARTUP TASK
*********************************************************************************************************
*/
void TaskStart (void *pdata)
{
#if OS_CRITICAL_METHOD == 3 /* Allocate storage for CPU status register */
OS_CPU_SR cpu_sr;
#endif
INT16S key;
pdata = pdata; /* Prevent compiler warning */
TaskStartDispInit(); /* Initialize the display */
OS_ENTER_CRITICAL();
PC_VectSet(0x08, OSTickISR); /* Install uC/OS-II's clock tick ISR */
PC_SetTickRate(OS_TICKS_PER_SEC); /* Reprogram tick rate */
OS_EXIT_CRITICAL();
OSStatInit(); /* Initialize uC/OS-II's statistics */
TaskStartCreateTasks(); /* Create all the application tasks */
for (;;) {
if (PC_GetKey(&key) == TRUE) { /* See if key has been pressed */
if (key == 0x1B) { /* Yes, see if it's the ESCAPE key */
PC_DOSReturn(); /* Return to DOS */
}
}
OSTimeDlyHMSM(0, 0, 1, 0); /* Wait one second */
}
}
/*$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 3 Philosophers ", 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, "Task0() : ", 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, "Task4() : ", 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);
PC_DispStr( 0, 21, " ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 22, " ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
PC_DispStr( 0, 23, " <-PRESS 'ESC' TO QUIT-> ", DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY + DISP_BLINK);
/* 1111111111222222222233333333334444444444555555555566666666667777777777 */
/* 01234567890123456789012345678901234567890123456789012345678901234567890123456789 */
}
/*$PAGE*/
/*
*********************************************************************************************************
* CREATE TASKS
*********************************************************************************************************
*/
static void TaskStartCreateTasks (void)
{
INT8U i;
for (i = 0; i <N_TASKS; i++) { /* Create N_TASKS identical tasks */
TaskData[i] = i; /* Each task will pass its own id */
OSTaskCreate(Task, (void *)&TaskData[i], &TaskStk[i][TASK_STK_SIZE - 1], i+1);
}
}
/*$PAGE*/
/*
*********************************************************************************************************
* TASKS
*********************************************************************************************************
*/
void Task (void *pdata)
{
INT8U err;
INT8U i;
INT8U j;
i=*(int *)pdata;
j=(i+1) % 5;
for (;;) {
TASK_Thinking_To_Hungry(i);
OSSemPend(fork[i], 0, &err);
OSSemPend(fork[j], 0, &err); /* Acquire semaphores to eat */
TASK_Eat(i);
OSSemPost(fork[j]);
OSSemPost(fork[i]); /* Release semaphore */
OSTimeDly(100); /* Delay 10 clock tick */
}
}
static void TASK_Thinking_To_Hungry(INT8U data)
{
char s[80];
sprintf(s, "philosopher %5d is thinking.", data);
PC_DispStr(15, 10+data, s, DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
OSTimeDly(200);
sprintf(s, "philosopher %5d is hungry. ", data);
PC_DispStr(15, 10+data, s, DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
OSTimeDly(200);
}
static void TASK_Eat(INT8U data)
{
char s[80];
sprintf(s, "philosopher %5d is eating. ", data);
PC_DispStr(15, 10+data, s, DISP_FGND_BLACK + DISP_BGND_LIGHT_GRAY);
OSTimeDly(200);
}
?? 快捷鍵說明
復制代碼
Ctrl + C
搜索代碼
Ctrl + F
全屏模式
F11
切換主題
Ctrl + Shift + D
顯示快捷鍵
?
增大字號
Ctrl + =
減小字號
Ctrl + -