EEPW论坛

定时器操作的程序如下：（自己测试用的）
main.c文件：
#include "mb95200.h"

unsigned int Systemtime;

/******************************************************************************
NAME:  InitCompTimer();
FUNCTION: initial timer for the interval timer (Free run) function
******************************************************************************/
void InitCompTimer (void)
{
 T01DR = 0x01;    // set count value (high 8 bit)
 T00DR = 0xFF;    // set count value (low 8 bit)
 TMCR0 = 0x10;    // 16-bit, no filtering
 T00CR0 = 0x82;    // interval timer in free run mode
        // enable IF flag interrupt
 T00CR1 = 0xA1;    // enable interrupt, enable output
        // start timer
}

/******************************************************************************
   name: CompTimer ();
   function: enter ISR while the counter value matches the pre-set value
******************************************************************************/
__interrupt void CompTimer (void)
{
 T00CR1_IE = 0;    // disable interrupt
 T00CR1_IF = 0;    // clear flag

 //...      // interrupt service routine
 Systemtime++;

 T00CR1_IE = 1;    // enable interrupt
}

/******************************************************************************
   name: main ();
   function: main loop
******************************************************************************/
void main (void)
{
 InitCompTimer();
 InitIrqLevels();
 __EI();
 
 DDR6_P63 = 1;
 while (1)
 {
 if(Systemtime<=10)
    {
    PDR6_P63=0;
    }
 if(Systemtime>=20)
    {
    PDR6_P63=1;
    }
 if(Systemtime>=30) {Systemtime=0;}
 }
}