화이트앳-ATMEGA128,AVR 정복,아두이노,Cortex-M3

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

PF3(ADC3) 핀에연결된가변저항(5K) 값을읽어

PORTA 에연결된LED에출력

가변저항0.6K 이하=> LED1개ON

가변저항1.2K 이하=> LED2개ON

가변저항1.8K 이하=> LED3개ON

가변저항2.4K 이하=> LED4개ON

가변저항3.0K 이하=> LED5개ON

가변저항3.6K 이하=> LED6개ON

가변저항4.2K 이하=> LED7개ON

가변저항4.2K 초과=> LED8개ON

Main Clock : 11.0592Mhz 

Tools : AVR Studio    4.16

테스트보드: WAT-AVR128 보드+ WAT IO&ADC

http://avr128.com  

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

#include <avr/io.h>

#include <avr/interrupt.h>

#include <stdio.h>

#include "wat128.h"

// AD 값보관

UINT16 g_adc1;

int main()

{

           INT16 uiTemp; // 임시변수

           // LED 출력용포트

           DDRA = 0xFF;

           // ADC 초기화

           InitADC();

           while (1)

           {  

                     g_adc1 = 0;

                     // 노이즈를생각해서값을16번읽어평균을낸다.

                     for(uiTemp = 0; uiTemp<16;uiTemp++){

                                ADMUX=0x40 | 0x01;

                                ADCSRA = 0xD7;                  
                                while((ADCSRA & 0x10) != 0X10);

                                g_adc1 += ADCL + (ADCH*256);

                     }

                     g_adc1>>=4;

                     if( g_adc1 <128)                       // 1/8 회전

                                PORTA = 0xFE;

                     else if( g_adc1 <256)                 // 2/8 회전

                                PORTA = 0xFC;

                     else if( g_adc1 <384)                 // 3/8 회전

                                PORTA = 0xF8;

                     else if( g_adc1 <512)                 // 4/8 회전

                                PORTA = 0xF0;

                     else if( g_adc1 <640)                 // 5/8 회전

                                PORTA = 0xE0;

                     else if( g_adc1 <768)                 // 6/8 회전

                                PORTA = 0xC0;

                     else if( g_adc1 <896)                 // 7/8 회전

                                PORTA = 0x80;

                     else 

                                PORTA = 0x00;

           }

}