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标题: ATMege16的AD采样程序 [打印本页]

作者: 因为思念谁 时间: 2016-6-14 18:58
标题: ATMege16的AD采样程序
#include <iom16v.h>
#include <macros.h>
#include <stdio.h>
#define uchar unsigned char
#define uint  unsigned int
uchar valueL;
uchar valueH;
uchar TAB[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};  //数字编码
uchar TABD[]={0x40,0x79,0x24,0x30,0x19,0x12,0x02,0x78,0x00,0x10}; //带小数点的编码

void delay_1us(void)                //1us延时函数
  {
asm("nop");
  }

void delay_nus(unsigned int n)    //N us延时函数
  {
unsigned int i=0;
for (i=0;i<n;i++)
delay_1us();
  }

void delay_1ms(void)                //1ms延时函数
  {
unsigned int i;
for (i=0;i<1140;i++);
  }

void delay_nms(unsigned int n)    //N ms延时函数
  {
unsigned int i=0;
for (i=0;i<n;i++)
delay_1ms();
  }
void adc_init(void)
{
ADCSR = 0x00; //disable adc
ADMUX = 0x20; //select adc input 0  选择ADC1
ACSR  = 0x80; //关模拟比较器
ADCSR = 0xE6;//ADSC
}
void m16_init()
{
DDRA=0X00;
PORTA=0XFF;
DDRB=0XFF;
PORTB=0X00;
DDRC=0XFF;
PORTC=0X00;
DDRD=0X00;
PORTD=0XFF;
}
void main()
{
float v;uint v0;
uchar s,g;
adc_init();
m16_init();
while(1)
      {
         valueL=ADCL;//读取AD的低位
         valueH=ADCH;//读取AD的高位
            v=valueH*4.8/256; //只用高八位求取电压(十位AD用八位)
            v0=v*10;
            s=v0/10;
            g=v0%10;
         PORTC=0X40

ORTB=TABD;delay_nms(5);
PORTC=0X80ORTB=TAB[g];delay_nms(5);
}
}

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