ad.c

M16内部采样并用Max7221-7219显示

#include <iom16v.h>
#include "display.c"
#include "delay.h"

void port_init()
{
 PORTA = 0x00;
 DDRA  = 0x00;
 PORTB = 0x00;
 DDRB  = 0xF0;
 PORTC = 0x00; //m103 output only
 DDRC  = 0x00;
 PORTD = 0x00;
 DDRD  = 0x00;
}

void main()
{
  unsigned int Ddata;
  port_init();
  SEG_INIT();
  ADMUX=0;
  while(1)
  {
  ADCSRA=0XC0;
  delay_nms(100);
  while(!(ADCSR&(1<<(ADIF))));
  Ddata=ADCL;
  Ddata+=ADCH*256;
  Ddata=(unsigned int)(((float)Ddata)*5000/1023);
  SEG_R(Ddata);
  SEG_L(Ddata);
  delay_nms(1000);
  }
}