// MCU BASIC: https://www.basic4mcu.com
// DateTime : 2018-06-12 오후 12:31:50
// by Ok-Hyun Park
//
//--------------------------keypad.h
//
#ifndef __KEYPAD_H__
#define __KEYPAD_H__
//키패드 버튼 코드값
#define SW0    0x18 // 0-번째 행
#define SW1    0x14
#define SW2    0x12
#define SW3    0x11
#define SW4    0x28 // 1-번째 행
#define SW5    0x24
#define SW6    0x22
#define SW7    0x21
#define SW8    0x48 // 2-번째 행
#define SW9    0x44
#define SW10   0x42
#define SW11   0x41
#define SW12   0x88 // 3-번째 행
#define SW13   0x84
#define SW14   0x82
#define SW15   0x81
#define NO_KEY 0x00
//함수 정의
void KeyInit(void);
unsigned char KeyInput(void);
int Keyuse1(void);
#endif
//--------------------------keypad.c
//
#include "keypad.h"
#define N_COL   4      // 스캔할 키패드 열 수
#define KEY_OUT PORTF  // Keypad 출력 포트
#define KEY_IN  PINF   // Keypad 입력 포트
#define KEY_DIR DDRF   // Keypad 입출력 방향 레지스터
static unsigned char Key_scan(void);
static unsigned char pin=NO_KEY; // 이전 코드 값
//
void KeyInit(){
  KEY_OUT=0xF0; // 출력 초기값으로 0을 출력
  KEY_DIR=0x0F; // 하위 니블->출력,상위 니블->입력
}
//=======================================
// 키패드의 스캔 코드값을 반환한다.// 리턴 값: 0이 아닐 때: 스캔 코드값 // 0일 때: 입력 값이 없음
//=======================================
unsigned char KeyInput(void){
  unsigned char in,in1;
  in=Key_scan();      // 키 스캔을 하여 코드값을 읽는다.
  while(1){
    _delay_ms(30);    // 디바운싱 시간 지연
    in1=Key_scan();   // 한 번 더 읽는다.
    if(in==in1)break;
    in=in1;
  }
  if(!(in&0xF0)){ pin=0; return 0; } // 눌러진 키가 없음
  if(pin==in)return 0;               // 같은 키를 계속 누르고 있음 // 새로운 키 입력이 없는 것으로 리턴
  pin=in;                            // 키 값을 저장함
  return in;                         // 코드를 반환한다.
}
//---------------------------------------------------------------
//스캔 코드값을 리턴함
//---------------------------------------------------------------
static unsigned char Key_scan(void){
  unsigned char out,i,in;
  out=0x01; // 3-열부터 스캔
  for(i=0; i<N_COL; i++){
    KEY_OUT=~out; asm("nop"::); // 출력 포트에 스캔 출력을 낸다.// 1사이클 지연
    in=(~KEY_IN)&0xF0;          // 입력된 값의 상위 4비트를 취한다.
    if(in){ in+=out; break; }   // 출력과 입력을 조합하여 코드 생성 // 입력이 있으므로 루프 탈출
    out<<=1;                    // 다음 스캔 코드값으로 변경
  }
  return in; // 스캔 코드값 반환
}
//
int Keyuse1(void){
  int passward=1111; char buf1[4];
  static int cursorlocation=0; unsigned char key; // 입력값
  KeyInit();
  while(1){
    key=KeyInput(); int passward[2]={1111,1111}; char buf1[4]; LcdCommand(CURSOR_ON);
    switch(key){
      case SW0:{ // 스위치 1
        if     (cursorlocation==0&&passward[1]<9000){ passward[1]=passward[1]+1000; sprintf(buf1,"%d",passward[1]);                   LcdPuts(buf1); LcdCommand(HOME);                                     } // 천다위 더하기
        else if(cursorlocation==1&&passward[1]<9900){ passward[1]=passward[1]+100;  sprintf(buf1,"%d",passward[1]); LcdCommand(HOME); LcdPuts(buf1); LcdCommand(HOME);          LcdCommand(CURSOR_RSHIFT); } // 100단위 더하기
        else if(cursorlocation==2&&passward[1]<9990){ passward[1]=passward[1]+10;   sprintf(buf1,"%d",passward[1]); LcdCommand(HOME); LcdPuts(buf1); LcdCommand(CURSOR_LSHIFT); LcdCommand(CURSOR_LSHIFT); } //10단위 더하기
        else if(cursorlocation==3&&passward[1]<9999){ passward[1]=passward[1]+1;    sprintf(buf1,"%d",passward[1]); LcdCommand(HOME); LcdPuts(buf1); LcdCommand(CURSOR_LSHIFT);                            } //1단위 더하기
        break;
      }
      case SW1:{ // 스위치 2
        if     (cursorlocation==0&&passward[1]>2000){ passward[1]=passward[1]-1000; sprintf(buf1,"%d",passward[1]);                   LcdPuts(buf1); LcdCommand(HOME);                                     }
        else if(cursorlocation==1&&passward[1]>1200){ passward[1]=passward[1]-100;  sprintf(buf1,"%d",passward[1]); LcdCommand(HOME); LcdPuts(buf1); LcdCommand(HOME);          LcdCommand(CURSOR_RSHIFT); }
        else if(cursorlocation==2&&passward[1]>1120){ passward[1]=passward[1]-10;   sprintf(buf1,"%d",passward[1]); LcdCommand(HOME); LcdPuts(buf1); LcdCommand(CURSOR_LSHIFT); LcdCommand(CURSOR_LSHIFT); }
        else if(cursorlocation==3&&passward[1]>1111){ passward[1]=passward[1]-1;    sprintf(buf1,"%d",passward[1]); LcdCommand(HOME); LcdPuts(buf1); LcdCommand(CURSOR_LSHIFT);                            }
        break;
      }
      case SW2: if(cursorlocation<3){ cursorlocation=cursorlocation+1; LcdCommand(CURSOR_RSHIFT); } break; // 커서를 오른쪽 한칸 이동 // 스위치 3
      case SW3: if(cursorlocation>0){ cursorlocation=cursorlocation-1; LcdCommand(CURSOR_LSHIFT); } break; // 커서를 왼쪽으로 한칸이동 // 스위치 4
    }
  }
}
//--------------------------main.c
//
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>
#include <stdio.h>
#include "iseg7.h"
#include "lcd.h"
#include "keypad.c"
//
int main(void){
  int passward=1111; char buf1[4];
  LcdInit();
  StringInit();
  sprintf(buf1,"%d",passward);
  LcdMove(0,0); LcdPuts(buf1);         // LCD 첫줄에에 1111을 표시
  LcdMove(1,0); LcdPuts(string[8]);    // LCD의 둘째줄에 LCD.C에 선언한 문자를 표시
  LcdMove(0,0); LcdCommand(CURSOR_ON); // 커서 키키
  Keyuse1();                           // 스위치를 통해서 LCD 첫줄의 숫자 변경
}
 
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