help me in AVR ADC

[beginer electroner]

I need a link on the adc working, and some basic application

 

[Sceadwian]

Try the appnotes on Atmel's website, they cover the basic (and some advanced) features of the AVR's ADC includeing code examples.

Such as
https://www.electro-tech-online.com/custompdfs/2006/12/doc2559.pdf
https://www.electro-tech-online.com/custompdfs/2006/12/DOC0942PDF.pdf
and
https://www.electro-tech-online.com/custompdfs/2006/12/doc8003.pdf

 

[Mindaugasu]

If you like WinAVR compiler tools you can use AVRLIB library. Then code looks really simple:

//----- Include Files ---------------------------------------------------------
#include <avr/io.h>		// include I/O definitions (port names, pin names, etc)
#include <avr/signal.h>	// include "signal" names (interrupt names)
#include <avr/interrupt.h>	// include interrupt support
#include <avr/iom8.h>
#include <avr/delay.h>
#include "global.h"		// include our global settings
//#include "uart.h"		// include uart function library
#include "rprintf.h"	// include printf function library
#include "a2d.h"		// include A/D converter function library
#include "timer.h"		// include timer function library (timing, PWM, etc)
#include "lcd.h"

//----- Begin Code ------------------------------------------------------------
int main(void)
{
	u08 a=0;
	u08 Pressure;

	a2dInit();
	
	// initialize LCD
	lcdInit();
	// direct printf output to LCD
	rprintfInit(lcdDataWrite);

	// print message on LCD
	rprintf("Welcome");

	DDRC = 0x00;
	PORTC = 0x00;
lcdClear();
	// display a bargraph of the analog voltages on a2d channels 0,1
	while(1)
	{
	
		lcdGotoXY(0,0);
		lcdProgressBar(a2dConvert8bit(0), 255, 20);
		lcdGotoXY(0,1);
		Pressure=(int)((((a2dConvert8bit(0)+0.3)/255)-0.04)/0.009);
		rprintf("Pressure:%d  kPa", Pressure);
	}

	return 0;
}

Full ready to compile project files you can find here
Reading Pressure sensor with Atmega8