avr adc reading to 7 segment

[udgish patel]

hi all i am new at atmega i need to help in c code how to display adc reading in 7segment

 

i hav LVDt sensor and i hav adc voltage span of 2v

 i hav scale 0 to 100kg load can any buddy help me in start coding.

[srinu]

 

hi….udgish

am give u one adc code.. 

but it is in atmega8.

 

in this project am sending AADC values to UART…..

 

i hope u  undstd this code………

 

 

 

 

#define F_CPU 8000000UL

#include<avr/io.h>

#include<util/delay.h>

 

#include “lcd.h”

 

 

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

********** adc init                                     ******

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

 

void InitADC()

{

ADMUX=(1<<REFS0);

ADCSRA=(1<<ADEN)|(1<<ADPS2)|(1<<ADPS1)|(1<<ADPS0);

 

}

 

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

**** READING ADC BITS  ***

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

 

uint16_t ReadADC(uint8_t ch)

{

ch=ch&0b00000111;

ADMUX =ch | (1<<REFS0);

ADCSRA|=(1<<ADSC);

while(!(ADCSRA & (1<<ADIF)));

ADCSRA|=(1<<ADIF);

return(ADC);

}

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

***** UART*******************************************

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

 

void uart_init()

{

// SETTING BIT PARITY (8BIT OR 9 BIT)

UCSRC=(1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0); //8 BIT

 

 //FOR TX AND RX

UCSRB=(1<<RXEN)|(1<<TXEN);// ENABLING TX,RX.  

 

UBRRL=0x33; // baud rate(51 for 9600)

}

 

void tx_data(unsigned char c)

{

//SENDING DATA;

UDR=c;

while(!(UCSRA & (1<<TXC)));  //set the TX flag

//clear the TX flag

UCSRA=(1<<TXC);

}

 

unsigned char rx_data()

{

 

// Wait for data to be received 

while ( !(UCSRA & (1<<RXC)) ); // set the rx flag

UCSRA=(0<<RXC);// CLEAR THE rx flag

/* Get and return received data from buffer */

return UDR;

}

 

 

 

void Tx_String(unsigned char *str)

{

while(*str)

{

tx_data(*str);

str++;

}

 

}

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

**MAIN PROGRAM ** ** ** ** ** ** ** ** ** ** *

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

 

void main()

{

int adc_result0;

uart_init();

InitADC();

InitLCD(LS_BLINK|LS_ULINE);

LCDWriteStringXY(0,0,”adc_test”);

while(1)

{

_delay_ms(1000);

ReadADC(0);

   adc_result0=ReadADC(0);

 

LCDWriteIntXY(0,1,adc_result0,4);

tx_data(adc_result0);

 

}

 

}

 

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