auto.c

简易照度计的主程序

//Target  : M48
//Crystal : 1.0000Mhz
//Authror : 侯进振
//Date    : 2008.11.4
#include <iom48v.h>
#include <macros.h>
////////////////////////////////////////////////////////////
unsigned char digit[11]={0xC0,0xF9,0x92,0xB0,0xA9,0xA4,0x84,0xF1,0x80,0xA0,0xFF};
float V=0;
unsigned long lux;
////////////////////////////////////////////////////////////
void port_init(void)
{
 PORTB = 0x00;
 DDRB  = 0xFF;
 PORTC = 0xE0;
 DDRC  = 0x17;
 PORTD = 0x02;
 DDRD  = 0xFE;
}
////////////////////////////////////////////////////////////
//ADC initialize
void adc_init(void)
{
 ADCSRA = 0x00; //disable adc
 ADMUX = 0x00;  //select adc ref
 ACSR  = 0x80;
 ADCSRB = 0x00;
}
////////////////////////////////////////////////////////////
//call this routine to initialize all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 port_init();
 adc_init();
 SEI(); //re-enable interrupts
 //all peripherals are now initialized
}
///////////////////////////////////////////////////////////////
void delay(unsigned int n)
{
  
  while(n--);

}
////////////////////////////////////////////////////////////
void adc(void)
{
 	unsigned char temp1;
	unsigned int temp2=0,i;
	unsigned long temp3=0;
	
	ADMUX = 0xC3;//选择1.1V基准,通道5
	for(i=0;i<64;i++)//数字滤波处理
      {
	   ADCSRA |= 0xC7;//开始转换
	   delay(5);
	   temp1 = ADCL;
	   temp2 = ADCH;
	   temp2   <<=8;
	   temp2+= temp1;
	   temp3=temp2+temp3;
	   }
	temp3=temp3>>6;
	
	V = ((float)(temp3))*1.1/1023.0;
	if(V>=1.0)
	{
	  ADMUX = 0x43;//选择5.0V基准,通道5
	  for(i=0;i<64;i++)//数字滤波处理
      {
	   ADCSRA |= 0xC7;//开始转换
	   delay(5);
	   temp1 = ADCL;
	   temp2 = ADCH;
	   temp2   <<=8;
	   temp2+= temp1;
	   temp3=temp2+temp3;
	   }
	   temp3=temp3>>6;
	
	   V = ((float)(temp3))*5.0/1023.0;
	}	    
}
///////////////////////////////////////////////////////////////
void display_below(void)
{
 unsigned char wei1,wei2,wei3,wei4;
 
 wei1 = lux/1000;
 wei2 = lux%1000/100;
 wei3 = lux%100/10;
 wei4 = lux%10;
 
 if(lux<=10)       {wei1 = 10;wei2 = 10;wei3 = 10;}
 else if(lux<=100) {wei1 = 10;wei2 = 10;}
 else if(lux<=1000) wei1 = 10;
 
     PORTB = digit[wei1];
	 PORTC&= 0xE8;PORTC|= 0x01;
	 delay(100);PORTC&= 0xE8;
	 
	 PORTB = digit[wei2];
	 PORTC&= 0xE8;PORTC|= 0x02;
	 delay(100);PORTC&= 0xE8;
	 
	 PORTB = digit[wei3];
	 PORTC&= 0xE8;PORTC|= 0x04;
	 delay(100);PORTC&= 0xE8;
	 
	 PORTB = digit[wei4];
	 PORTC&= 0xE8;PORTC|= 0x10;
	 delay(100);PORTC&= 0xE8;
	 
	 
}
///////////////////////////////////////////////////////////////
void display_high(void)
{
 unsigned char wei1,wei2,wei3,wei4;
 PORTD&=0xF7;//LED_1 ON
 wei1 = lux/10000;
 wei2 = lux%10000/1000;
 wei3 = lux%1000/100;
 wei4 = lux%100/10;
 
 if(lux<=1000)       {wei1 = 10;wei2 = 0;wei3 = 0;}
 else if(lux<=10000) {wei1 = 10;wei2 = 0;}
 else if(lux<=100000) wei1 = 10;
     PORTB = digit[wei1];
	 PORTC&= 0xE8;PORTC|= 0x01;
	 delay(100);PORTC&= 0xE8;
	 
	 PORTB = digit[wei2];
	 PORTB&=0x7F;//加小数点
	 PORTC&= 0xE8;PORTC|= 0x02;
	 delay(100);PORTC&= 0xE8;
	 
	 PORTB = digit[wei3];
	 PORTC&= 0xE8;PORTC|= 0x04;
	 delay(100);PORTC&= 0xE8;
	 
	 PORTB = digit[wei4];
	 PORTC&= 0xE8;PORTC|= 0x10;
	 delay(100);PORTC&= 0xE8;
}
////////////////////////////////////////////////////////
void main(void)
{ 
 unsigned char i;
 init_devices();

//------------------------------------ 
  //PORTD|=0x18;//LED OFF
  //PORTD&=0xF7;//LED_1 ON
  //PORTD&=0xEF;//LED_2 ON
  //PORTD&=0xFD;//BUZZER ON
  //PORTD|=0x02;//BUZZER OFF
  while(1)
  {
  PORTD|=0x18;//LED OFF
  adc();
  lux = V*12500;
  for(i=0;i<100;i++)
  {
  if(lux<=9999)
   display_below();
  else
   display_high();
  }
  if((PIND&0x01)==0x01)
   {
    PORTD&=0xEF;//LED_2 ON
    PORTD&=0xFD;//BUZZER ON
	delay(10000);
	PORTD|=0x02;//BUZZER OFF
	
    while(1)//*冻结显示
    {
	if(lux<=9999)
      display_below();
    else
      display_high();
	if((PIND&0x01)==0x00)
	  {
	  PORTD&=0xFD;//BUZZER ON
	  delay(10000);
	  PORTD|=0x02;//BUZZER OFF
	  break;
	  }
	}
   }
  }
}
///////////////////////////////////////////////////////