2019年10月15日 | 基于Atmega16的电压表制作 程序+原理图

附带proteus设计图 电路图 大图在附件里面
 

/*****************************************************

Project : 

Version : 

Date    : 2015-10-29

Author  :tengzaiba

Chip type               : ATmega16

AVR Core Clock frequency: 8.000000 MHz

*****************************************************/

#include

#include

// Declare your global variables here

char LCD_7[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};

char dis_buff[4];

unsigned int votage=0;

unsigned int vot1;

// Timer 0 overflow interrupt service routine

interrupt [TIM0_OVF] void timer0_ovf_isr(void)

{

// Place your code here

// Read the 8 most significant bits

// of the AD conversion result

PORTC.7=~PORTC.7;

delay_us(20);

while ((ADCSRA & 0x10)==0);

ADCSRA|=0x10;

vot1=ADCW;

votage=(unsigned long)vot1*5000/1024;

}

void display(unsigned int vot)

{

// move vot to dis_buff

char i;

char j;

for (i=0;i<4;i++)

   {

           dis_buff[i]=vot % 10;

           vot/=10;

   } 

// dis_buff to LEDs

for (j=0;j<=3;j++)

   {

           PORTC=LCD_7[dis_buff[j]];

           PORTA=~(1<           delay_ms(2);

           PORTA=0x0f;

   }

}

void main(void)

{

// Declare your local variables here

// Input/Output Ports initialization

// Port A initialization

// Func7=In Func6=In Func5=In Func4=In Func3=Out Func2=Out Func1=Out Func0=Out 

// State7=T State6=T State5=T State4=T State3=0 State2=0 State1=0 State0=0 

PORTA=0x00;

DDRA=0x0F;

// Port B initialization

// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In 

// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T 

PORTB=0x00;

DDRB=0x00;

// Port C initialization

// Func7=In Func6=Out Func5=Out Func4=Out Func3=Out Func2=Out Func1=Out Func0=Out 

// State7=T State6=0 State5=0 State4=0 State3=0 State2=0 State1=0 State0=0 

PORTC=0x00;

DDRC=0xFF;

// Timer/Counter 0 initialization

// Clock source: System Clock

// Clock value: Timer 0 Stopped

// Mode: Normal top=FFh

// OC0 output: Disconnected

TCCR0=0x03;

TCNT0=0x00;

OCR0=0x00;

// External Interrupt(s) initialization

// INT0: Off

// INT1: Off

// INT2: Off

MCUCR=0x00;

MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization

TIMSK=0x01;

// Analog Comparator initialization

// Analog Comparator: Off

// Analog Comparator Input Capture by Timer/Counter 1: Off

ACSR=0x80;

SFIOR=0x00;

// ADC initialization

// ADC Clock frequency: 1000.000 kHz

// ADC Voltage Reference: AREF pin

// ADC Auto Trigger Source: Timer0 Overflow

// Only the 8 most significant bits of

// the AD conversion result are used

ADMUX=0x47;

ADCSRA=0xA3;

SFIOR&=0x1F;

SFIOR|=0x80;

// Global enable interrupts

#asm("sei")

while (1)

      {

                  display(votage);

      };

}