A/D 변환 LCD에 쓰기
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2016.01.04 17:53
//Project: HkAD.c
//A/D Use Port: PORTA PIN0=Read//LCD Use Port(DATA): PORTC Write
//LCD Use Port(Control):PORTA Write(pin5,6,7)
//CPU Type: Atmel AVR8535,8515,103
//Clock Frequency: 4.9152Mhz
//Comfiler: AvrEdit3.1(AVRGCC)
//Date: 2001/08/05
//Author: hwang hae kwon
//포트A-PIN0 = A/D사용
//AREF = +5V
//AGND = GND
//AVCC= +5V
//가변저항 왼쪽= +5V
//가변저항 오른쪽 GND
//가변저항 중간= 포트A-PIN0번에 결선 합니다.
// LCD결선은 다 아시죠 생략 합니다.
//볼륨을 조정 하시면 전압 변동에 따라 0~1024까지
//숫자로 표시 됩니다.
//헤더화일은 LCD2*16.H를 이용 하세요.
#include <io.h>
#include <interrupt.h>
#include <signal.h>
void delay( int del);
//---------------------------
#define PortA_In_Out DDRA //A 입출력 설정
#define PortC_In_Out DDRC //C 입출력 설정
#define LCD_PORT_OUT_Bit PORTA
#define LCD_PORT_OUT PORTC
#define LCD_PORT_INPUT PINC
#define LCD_RS 5 // PORT C LCD 4
#define LCD_RW 6 // PORT C LCD 5
#define LCD_E 7 // PORT C LCD 6
#define PORT_IN 0x00 //포트 입력
#define PORT_OUT 0xff //포트 출력
#define LOW_PORT_OUT 0x0f //하위 포트 출력
#define HI_PORT_OUT 0xf0 //상위 포트 출력
//--------------------------------
unsigned char HexToAsiic_Map[16] = {"0123456789ABCDEF"};
//------- 10진수변환 자리수-------------------
unsigned char decimal_first_position,decimal_second_position;
unsigned char decimal_third_position,decimal_fourth_position;
unsigned char ADCL_low,ADCL_hi;
//-----------------------------
void delay(int del)
{
while ( del--);
}
//-------------------------
#include <lcd2_16.h>
//-----------------------
void port_init(void)
{
outp(0xfe,PortA_In_Out);// A/D
outp(0x00,ADMUX); //A/D관련 A-0 PORTA 읽음
outp(0xe0,ADCSR); //A/D관련 초기화
outp(0x01, TIMSK); //Timer0 interrupt허가
outp(0, TCNT0); // reset TCNT0
outp(5, TCCR0); // count with cpu clock/1024
}
//--------변환 10진수 자리수4자리로 변환LCD---------
void decimal_Chang (long decimal_temp)
{
long i;
unsigned char m,l,h;
i=decimal_temp;
l=i/1000; //0000자리
i%=1000; //나머지 i에저장
h=i/100; // 000
i%=100;
m=i/10; // 00
i%=10; // 0
decimal_first_position=HexToAsiic_Map[i];//space=0x80
if(decimal_temp<10)
decimal_second_position=0x80;
else
decimal_second_position=HexToAsiic_Map[m];
if(decimal_temp<100)
{
decimal_third_position=0x80;
}
else
{
decimal_third_position=HexToAsiic_Map[h];
}
if(decimal_temp<1000)
{
decimal_fourth_position=0x80;
}
else
{
decimal_fourth_position=HexToAsiic_Map[l];
}
//if(decimal_temp<10000) decimal_fifth_position=0x80;
// else decimal_fifth_position=HexToAsiic_Map[l];
}
//---------------------
SIGNAL(SIG_OVERFLOW0) /* signal handler for tcnt0 overflow interrupt */
{
int i;
i=inp(ADCH);
i=(i<<8);
ADCL_low = inp(ADCL);
i=(i | ADCL_low);
decimal_Chang(i);
lcd_char_out(8,1,decimal_fourth_position);
lcd_char_out(9,1,decimal_third_position);
lcd_char_out(10,1,decimal_second_position);
lcd_char_out(11,1,decimal_first_position);
outp(0, TCNT0); //eset counter to get this interrupt again
}
//---------------------------
int main( void )
{
port_init();
lcd_init();
lcd_clr();
lcd_string_out(0,0," A/D Test");
sei();// timer interrupt start
while(1)
{
}
}
