timer1.c

来自「cc1110,cc2510透传代码,IAR环境的」· C语言 代码 · 共 53 行

#include "includes.h"

//-----------------------------------------------------------------------------
// See hal.h for a description of this function.
//-----------------------------------------------------------------------------
word halSetTimer1Period(dword period){

   byte div = 0;
   // Checking that the period is not too short for the timer tick interval.
   if(TICKSPD > 5) {
      if( (period < 2*(TICKSPD-5)) && (period != 0) ){
         return 0;
      }
   }
   if(period == 0){  // Max timer period is used.
      div = 3;
      period = 0x0000FFFF;
   }
   else{
      period = ((period*26) >> TICKSPD); // Calculating number of timer ticks the period
      if(period&0xFFFF0000){             // Using prescaler to fit period
         period = (period >> 3);
         div = 1;
         while (period&0xFFFF0000){
            period = (period >> 2);
            div++;
            if(div > 3){                 // If the period is too long, 0 is returned.
               return 0;
            }
         }
      }
   }
   T1CTL = ((T1CTL&~0x0c) | (div << 2)); // Setting prescaler division value
   T1CC0L = (byte)(period);              // Setting counter value
   T1CC0H = (byte)(period >> 8);
   return (word)period;
}

//----------------------------------------------------------------------------
//  　定时器１初始化
//----------------------------------------------------------------------------
void timer1Init(void)
{
	TIMER1_INIT();
	if(halSetTimer1Period(10000))	// 10ms
	{
	  TIMER1_ENABLE_OVERFLOW_INT(true);
	  INT_ENABLE(INUM_T1, INT_ON);
	  TIMER1_RUN(true);
	}
}
//------------------------------------------------------