芯艺工作室 - 技术文章

定时器应用示例

/***********************************
功能：定时器测试程序
MCU:dsPIC30F4011
TOOLS:MPLAB X IDE V3.15 + XC16 V1.25
震荡器:外部4M晶振

芯艺设计室 http://www.chipart.cn
2015-12-04
***********************************/
#include "xc.h"
#include <stdint.h>

#define XTFREQ                 4000000  // xtal = 4Mhz;
#define PLLMODE                     16  // PLLx16
#define FCY           XTFREQ*PLLMODE/4  // Instruction Cycle Frequency

#define LED_PORT_INIT TRISBbits.TRISB6=0
#define LED_ON  LATBbits.LATB6=1
#define LED_OFF LATBbits.LATB6=0
#define LED_FLASH LATBbits.LATB6^=1

_FOSC(CSW_FSCM_OFF & XT_PLL16);
_FWDT(WDT_OFF);

void __attribute__((__interrupt__,no_auto_psv))_T1Interrupt(void)
{
  LED_FLASH;
  IFS0bits.T1IF = 0;
}

void Timer1Init(void)
{
    PR1=62500; //16000000/256
    T1CONbits.TCKPS=3; //256

    IEC0bits.T1IE=1;
    T1CONbits.TON=1;
}

int main( void )
{
    LED_PORT_INIT;
    Timer1Init();
    while(1)
    {
    }
    return 0;
}