os_cfg.c

来自「逆变、电瓶充电、数控电源、开关电源」· C语言 代码 · 共 37 行

// 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:2008.04.06

#include "main.h"
#include "os_cfg.h"

unsigned char task_delay[MAX_TASK];

//定时器2初始化
void os_timer2_init(void)
{
 	unsigned char i;
 	for(i=0;i<MAX_TASK;i++) task_delay[i]=0;
 	T2CON = 0x00; 				//定时器2初始化 
	TH2 = (65536-CLOCK/TIME_PER_SEC/12) / 256;	//CRY_OSC,TIME_PER_SEC在easycfg.h中配置
  	TL2 = (65536-CLOCK/TIME_PER_SEC/12) % 256;      	
   RCAP2H = (65536-CLOCK/TIME_PER_SEC/12) / 256;
	RCAP2L = (65536-CLOCK/TIME_PER_SEC/12) % 256; 
  	ET2 = 1;
	TR2 = 1;
}

// 系统OS定时中断服务
void os_timer2(void) interrupt 5
{
   unsigned char i;
	TF2 = 0;  //必须手动清除
  	for(i=0;i<MAX_TASK;i++) if(task_delay[i]) task_delay[i]--;	//每节拍对任务延时变量减1 ，减至 0 后，任务就绪。  
} 

void run(void (*ptask)())
{ 
   (*ptask)(); 
}