os_cfg.c

Easy51RTOS应用Easy51RTOS应用

// Header:精简协作式不可剥夺嵌入式操作系统
// File Name: Easy51RTOS
// Author:田开坤
// Date:2006.08.01

#include "os_cfg.h"
#define Runing(ON) P17 = ~P17

uchar OS_Delay[MAX_TASK];

//定时器0初始化
void OS_InitTimer0(void)
{
 uchar i;
 for(i=0;i<MAX_TASK;i++) OS_Delay[i]=0;
 //定时器0工作在模式1，16Bit定时器模式
 TMOD = (TMOD & 0XF0) | 0X01; 
 //CRY_OSC,TIME_PER_SEC在easycfg.h中配置
 TH0 = 255-CRY_OSC/TIME_PER_SEC/12/256;
 TL0 = 255-CRY_OSC/TIME_PER_SEC/12%256; 
 TR0 =1;
 ET0 =1;
}

//定时中断服务
void OS_Timer0(void) interrupt 1 using 2
{
 uchar i;
 //CRY_OSC,TIME_PER_SEC在easycfg.h中配置
 TH0 = 255-CRY_OSC/TIME_PER_SEC/12/256;
 TL0 = 255-CRY_OSC/TIME_PER_SEC/12%256;
 //每节拍对任务延时变量减1 ，减至 0 后，任务就绪。
 for(i=0;i<MAX_TASK;i++)
 {
  if(OS_Delay[i]!=0) OS_Delay[i]--;
 }
 //Runing(On);
}