ad._c

用ICC编写的程序包括SPI

#include "ad.h"

unsigned int AD_value[AD_size]={0,0,0,0,0,0,0,0}; 
unsigned char ad_index; 
const unsigned char ad_channel[AD_size]={0,1,2,3,4,5,6,7};
unsigned char ad_frist_flag;
#pragma interrupt_handler adc_isr:15
void adc_isr(void)
{
 //conversion complete, read value (int) using...
 // value=ADCL;            //Read 8 low bits first (important)
 // value|=(int)ADCH << 8; //read 2 high bits and shift into top byte
 //CLI();
 if(ad_frist_flag)
	  ad_frist_flag=0;
 else
	  {
	  AD_value[ad_index]=ADCL;
	  AD_value[ad_index]|=(int)AD_value[ad_index]<<8;
	  ad_index++;
	  if(ad_index<sizeof(ad_channel))
			{
			 ADMUX|=ad_channel[ad_index];
			 ADCSRA|=BIT(ADSC);
			 }
	  }
 //SEI();
}

void adc_init(void)
{
 ADCSR = 0x00; //disable adc
 	    //select adc input 0
 ADMUX=BIT(REFS0);
 ADCSR=BIT(ADPS2)|BIT(ADEN)|BIT(ADIE);
 ad_frist_flag=1;
 
}

void adc_start(void)
{
 	 ADMUX|=ad_channel[ad_index++];
	 ADCSR|=BIT(ADSC);

}