현재 위치
홈
예제 라이브러리
//Sample using LiquidCrystal library #include <LiquidCrystal.h> /******************************************************* This program will test the LCD panel and the buttons Mark Bramwell, July 2010 ********************************************************/ // select the pins used on the LCD panel LiquidCrystal lcd(8, 9, 4, 5, 6, 7); // define some values used by the panel and buttons int lcd_key = 0; int adc_key_in = 0; #define btnRIGHT 0 #define btnUP 1 #define btnDOWN 2 #define btnLEFT 3 #define btnSELECT 4 #define btnNONE 5 // read the buttons int read_LCD_buttons() { adc_key_in = analogRead(0); // read the value from the sensor // my buttons when read are centered at these valies: 0, 144, 329, 504, 741 // we add approx 50 to those values and check to see if we are close if (adc_key_in > 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result // For V1.1 us this threshold if (adc_key_in < 50) return btnRIGHT; if (adc_key_in < 250) return btnUP; if (adc_key_in < 450) return btnDOWN; if (adc_key_in < 650) return btnLEFT; if (adc_key_in < 850) return btnSELECT; // For V1.0 comment the other threshold and use the one below: /* if (adc_key_in < 50) return btnRIGHT; if (adc_key_in < 195) return btnUP; if (adc_key_in < 380) return btnDOWN; if (adc_key_in < 555) return btnLEFT; if (adc_key_in < 790) return btnSELECT; */ return btnNONE; // when all others fail, return this... } void setup() { lcd.begin(16, 2); // start the library lcd.setCursor(0,0); lcd.print("Push the buttons"); // print a simple message } void loop() { lcd.setCursor(9,1); // move cursor to second line "1" and 9 spaces over lcd.print(millis()/1000); // display seconds elapsed since power-up lcd.setCursor(0,1); // move to the begining of the second line lcd_key = read_LCD_buttons(); // read the buttons switch (lcd_key) // depending on which button was pushed, we perform an action { case btnRIGHT: { lcd.print("RIGHT "); break; } case btnLEFT: { lcd.print("LEFT "); break; } case btnUP: { lcd.print("UP "); break; } case btnDOWN: { lcd.print("DOWN "); break; } case btnSELECT: { lcd.print("SELECT"); break; } case btnNONE: { lcd.print("NONE "); break; } } }
Example use of Enhanced LiquidCrystal_I2C library(Not updated)
This library inherits LiquidCrystal and adds another method: button - to read button pushed on a keypad. This works on the Old version of the board V1.0
/* DFRobot LCD Shield for Arduino Key Grab v0.2 Written by Glendon Klassen gjklassen@gmail.com http://www.sourceforge.net/users/ecefixer http://ecefixer.tumblr.com Displays the currently pressed key on the LCD screen. Key Codes (in left-to-right order): None - 0 Select - 1 Left - 2 Up - 3 Down - 4 Right - 5 */ #include <LiquidCrystal.h> #include <DFR_Key.h> //Pin assignments for DFRobot LCD Keypad Shield LiquidCrystal lcd(8, 9, 4, 5, 6, 7); //--------------------------------------------- DFR_Key keypad; int localKey = 0; String keyString = ""; void setup() { lcd.begin(16, 2); lcd.clear(); lcd.setCursor(0, 0); lcd.print("Key Grab v0.2"); delay(2500); /* OPTIONAL keypad.setRate(x); Sets the sample rate at once every x milliseconds. Default: 10ms */ keypad.setRate(10); } void loop() { /* keypad.getKey(); Grabs the current key. Returns a non-zero integer corresponding to the pressed key, OR Returns 0 for no keys pressed, OR Returns -1 (sample wait) when no key is available to be sampled. */ localKey = keypad.getKey(); if (localKey != SAMPLE_WAIT) { lcd.clear(); lcd.setCursor(0, 0); lcd.print("Current Key:"); lcd.setCursor(0, 1); lcd.print(localKey); } }
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특징 |
아두이노 보드에서 버튼 입력과 LCD를 학습해 볼 수 있는 쉴드입니다.
프로젝트에도 사용가능합니다.
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구성품 |
아두이노 LCD 키패드 쉴드 LCD KeyPad Shield X1
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사양 |
Pin | Function |
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Analog 0 | Button (select, up, right, down and left) |
Digital 4 | DB4 |
Digital 5 | DB5 |
Digital 6 | DB6 |
Digital 7 | DB7 |
Digital 8 | RS (Data or Signal Display Selection) |
Digital 9 | Enable |
Digital 10 | Backlit Control |
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참고자료 |
아두이노스토리 네이버 카페 : http://cafe.naver.com/arduinostory
Arduino LCD KeyPad Shield
교환 및 반품안내
AS안내
- 소비자분쟁해결 기준(공정거래위원회 고시)에 따라 피해를 보상받을 수 있습니다.
- A/S는 아두이노스토리 고객센터에 문의하시길 바랍니다.
이미지 확대보기
아두이노 LCD 키패드 쉴드 / LCD KeyPad Shield / DFROBOT 호환 쉴드 (AS0255)
