/*
AD采样函数，标准10位精度采样函数，
ADC_buf[10][20];
*/
#include "iom128v.h"
#include "ADC.h"
#include "main.h"
unsigned int ADC_buf[4][8]; //
/*ADC采样函数，采样分辨率1024*/
/*单次转换周期约14us 85时钟周期 */
unsigned int get_one_adc(unsigned char Tongdao)
{
unsigned int i;
ADMUX = (1 << REFS0)|(1 << REFS1)+Tongdao ; /*基准内部2.56V */
ADCSRA = (1 << ADEN) | (1 << ADSC) /*使能、开启*/
| (1 << ADPS1) | (1 << ADPS0); /*32分频*/
while(!(ADCSRA & (1 << ADIF))); /*等待采样结束*/
i = ADC; /*读取AD结果 */
ADCSRA &= ~(1 << ADIF); /*清标志*/
ADCSRA &= ~(1 << ADEN); /*关闭转换*/
return i;
}
/* 总共用时约 900时钟周期 */
void get_ad(void) {
unsigned char i,j;
unsigned int min,max,adc8;
//double ftemp;
for (i=0;i<=7;i++)
{
ADC_buf[0][i]=get_one_adc(0);
ADC_buf[1][i]=get_one_adc(1);
ADC_buf[2][i]=get_one_adc(2);
ADC_buf[3][i]=get_one_adc(3);
}
for (j=0;j<=3;j++)
{
adc8=0;
min=1100;
max=0;
for(i=0;i<=7;i++)
{
adc8=adc8+ADC_buf[j][i];
if (min>ADC_buf[j][i]) min=ADC_buf[j][i];
if (max<ADC_buf[j][i]) max=ADC_buf[j][i];
}
adc8=adc8-min-max;
adc8=adc8/6;
Light_sensor[j+1]=adc8;
}
Light_sensor[1]= Light_sensor[1]*X_light_amend/50;
Light_sensor[3]= Light_sensor[3]*Y_light_amend/50;
}
