test.c

ucos-dining-philosopher.rar ucos下的哲学家就餐问题（dining philosopher problems)

#include "includes.h"

#define  TASK_STK_SIZE   512			//任务堆栈长度

OS_STK   StartTaskStk[TASK_STK_SIZE];		//定义任务堆栈区
OS_STK	 PhilosStk[5][TASK_STK_SIZE];
INT8U	 PhilosID[]={1,2,3,4,5};

INT16S   key;					//用于退出uCOS_II的键	

INT8U   err;
INT8U	x=0,y=0,z=0;				//字符显示位置
INT8U	i=0;

OS_EVENT *ChopStick[5];

void  StartTask(void *data);
void  Philos(void *data);

void  Quitkey(void);
void  DispCtrl(void);
/************************主函数*********************************************/
void  main (void)
{
	char temp[50];
    OSInit();					//初始化uCOS_II
    PC_DOSSaveReturn();				//保存Dos环境
    PC_VectSet(uCOS, OSCtxSw);			//安装uCOS_II中断
	for(i=0;i<5;i++)
	{
		ChopStick[i]=OSSemCreate(1);
		if (ChopStick[i]!=(OS_EVENT *)0)
		{
			sprintf(temp,"ChopStick %d create no error",i);
			PC_DispStr(40,20+i,temp,DISP_BGND_BLACK+DISP_FGND_YELLOW);
		}
	}
    OSTaskCreate(StartTask,0,&StartTaskStk[TASK_STK_SIZE - 1],5);		
    OSStart();			
}

//*****************************StartTask********************************************
void  StartTask(void *pdata)
{
	char temp[50];
	pdata=pdata;
    OS_ENTER_CRITICAL();
    PC_VectSet(0x08, OSTickISR);
    PC_SetTickRate(OS_TICKS_PER_SEC);
    OS_EXIT_CRITICAL();
//  OSStatInit();

	for(i=0;i<5;i++)
	{
		err=OSTaskCreate(Philos,(void *)&PhilosID[i],&PhilosStk[i][TASK_STK_SIZE - 1],i+6);
		if(err==OS_NO_ERR)
			//test if task is created successfully
		{
			sprintf(temp,"Philosopher %d create no error %d",PhilosID[i],err);
			PC_DispStr(0,20+i,temp,DISP_BGND_BLACK+DISP_FGND_YELLOW);
		}

	}

	OSTaskSuspend(OS_PRIO_SELF);	
}
//*****************************Philos********************************************
//the Philosopher first has to pick up the chopstick on his left hand then right
void  Philos(void *pdata)
{
	INT8U PhID;
	char temp[50];
   	PhID = *(INT8U *)pdata; 

    for (;;) 
	{

		OSTimeDly(200);
		sprintf(temp,"Philos %d is hungry",PhID);
		PC_DispStr(x,y++,temp,DISP_BGND_BLACK+DISP_FGND_WHITE);
		OSTimeDly(200);

		OSSemPend(ChopStick[(PhID-1)],0,&err);
		OSSemPend(ChopStick[(PhID%5)],0,&err);

		sprintf(temp,"Philos %d is eating",PhID);
		PC_DispStr(x,y++,temp,DISP_BGND_BLACK+DISP_FGND_WHITE);
		OSTimeDly(200);

		sprintf(temp,"Philos %d is thinking",PhID);
		PC_DispStr(x,y++,temp,DISP_BGND_BLACK+DISP_FGND_WHITE);
		OSSemPost(ChopStick[(PhID%5)]);
		OSSemPost(ChopStick[(PhID-1)]);

		OSTimeDly(200);
       		Quitkey();

        }
}

//*****************************Quitkey()********************************************
void Quitkey(void)
{
	if(PC_GetKey(&key)==TRUE)
	{
		if(key==0x1B)
			{PC_DOSReturn();}
	}
}
//******************************DispCtrl()********************************************
/*void DispCtrl()
{
	if(y==26)
	{
		y=0;
		if(x==0)  x=22;
		if(x==22) x=42;
		if(x==42) x=0;
	}
}
//5	0	4
//1	1	0
//2	2	1
//3	3	2
//4	4	3
//5	0	4*/