eint.c

来自「周立功arm7(lpc2104)的工程模板」· C语言 代码 · 共 42 行

// *********************************
// LPC2000 SYSTEM WITHOUT OS
// FILE:     EINT.C
// MODIFIED: ZPCYP 2005-3-16 20:16
// *********************************


#include "lpc22xx.h"
#include "vic.h"
#include "eint.h"
#include "main.h"


extern short adc_data[];
extern int index;


void isr_eint0(void) {

  EXTINT = 0x01;                        // Clear interrupt source

  adc_data[index] = (*((volatile short *) 0x82000000));

  if (++index >= ADC_DATA_CNT) {
    vic_irq_enable(VIC_CH_EINT0, 0);    // Disable EINT0
  }

}


void isr_eint0_init(void) {

  EXTMODE  = 0x01;                      // Trigged by edge
  EXTPOLAR = 0x01;                      // Rising edge
  vect_irq_install(VIC_CH_EINT0, 0, isr_eint0);
                                        // Install to slot 0 of VIC

}