timer1.c

来自「周立功arm7(lpc2104)的工程模板」· C语言 代码 · 共 56 行

// *********************************
// LPC22XX SYSTEM WITHOUT OS
// FILE:     TIMER.C
// MODIFIED: ZY 2007-5-31 8:30
// *********************************


#include "lpc22xx.h"
#include "main.h"
#include "vic.h"
#include "config.h"
#include "timer1.h"


extern  unsigned int counter;
extern unsigned char gao;
extern unsigned char high;
extern unsigned char low; 



void isr_timer0(void) 
{
	 
 gao = 	((counter >> 16 ) & 0x000000ff);
 //   gao = 0xaa;
	 UART0_SendByte(gao);
	 high = ((counter >> 8 ) & 0x000000ff); 
 //    high = 0xff;
	 UART0_SendByte(high);
	 low =(counter & 0x000000ff);
 //    low = 0xaa;
	 UART0_SendByte(low);  

	 counter = 0;
	 T0IR  = 0x01;
}		 


void timer0_init(void) {                // Install timer 0

  vect_irq_install(VIC_CH_TIMER0, VIC_SLOT_TIMER0, isr_timer0);

  T0IR  = 0xff;
  T0TC  = 0x00;
  
  T0MCR = 0x03;
  T0MR0 = 12000000;
  T0TCR = 0x01;
  VIC_INT_ENABLE(VIC_CH_TIMER0);

}