timer.c

来自「移植好的UCOS2.86版」· C语言 代码 · 共 63 行

#include "def.h"
#include    "2440addr.h"
#include "includes.h"
//U8 IntCnt;
//#define OSTickISR() Timer0_ISR()
/*********************************************************************************************************
Timer_Isr()
********************************************************************************************************/
void __irq Timer0_ISR(void)
{
	//rSRCPND =rSRCPND|( 1 << 10);
	//rINTPND = rINTPND;
	ClearPending(BIT_TIMER0);
	
//	IntCnt++;
//OSIntEnter();
Uart_Printf("%d->%d\n",OSTCBList->OSTCBPrio,OSTCBList->OSTCBDly);
	//Uart_Printf("\nOS_Tick"); 
	//Uart_Printf();
	/*
	if(IntCnt%2)
		rGPBDAT = 0x07fe;
	else
		rGPBDAT = 0x0000;*/
	OSTimeTick();
//OSIntExit();
}

/*********************************************************************************************************
Initial Timer0 use for ucos time tick
********************************************************************************************************/
void Timer0Init(void)
{
	// 定时器设置
	rTCON = rTCON & (~0xf) ;			// clear manual update bit, stop Timer0
	
	
	rTCFG0 	&= 0xffffff00;					// set Timer 0&1 prescaler 0
	rTCFG0 |= 4;							//prescaler = 4+1

	rTCFG1 	&= 0xfffffff0;					// set Timer 0 
	rTCFG1  |= 0x00000001;					// set Timer 0 MUX 1/4
    //rTCNTB0 = (PCLK / (60 * OS_TICKS_PER_SEC)) - 1;
    //rTCNTB0=33300;  //2000/(124+1)/16=1
    rTCNTB0=33300;  //2000/(4+1)/4=100
    rTCON = rTCON & (~0xf) |0x02;              // updata 		
	rTCON = rTCON & (~0xf) |0x09; 	// star
 }

/*********************************************************************************************************
system IsrInit
********************************************************************************************************/
//extern void OSTickISR(void);
void ISRInit(void)
{
	// 设置中断控制器
	rPRIORITY = 0x00000000;		// 使用默认的固定的优先级
	rINTMOD = 0x00000000;		// 所有中断均为IRQ中断
//	pISR_TIMER0= (U32) OSTickISR;
    pISR_TIMER0= (U32) Timer0_ISR;
	rINTMSK &= ~(1<<10);			// 打开TIMER0中断允许
//	IntCnt=0;
 }