16X2 LCD屏蔽与4x4矩阵键盘

Question

我有一个小问题。我试图在连接到arduino uno的4x4键盘的16x2 LCD屏幕上显示字符。当我按下键盘按钮时，相应的字符在串行监视器上成功打印，但不是dsplay。 我还应该提到，在查找字符的ASCII表之后，LCD上打印的错误字符对应于重复的ASCII字符，即按1键打印1111 1111，而另一个键可能打印对应于ASCII 1011的字符1011.基本上是从右下角到左上角的ascii表中的字符。另外，当我按下某个键时，它会在串行监视器上打印一次，但在LCD上多次打印。 我会在下面发布我的代码，并链接到我正在使用的键盘和LCD屏蔽。当我在显示屏上打印字符/文字时，最后一个注意事项与键盘无关，因此它们打印的很好。

代码：

#include <Keypad.h> 
#include <LiquidCrystal.h> // initialize the library with the numbers of the 

LiquidCrystal lcd(8, 9, 4, 5, 6, 7); 


const byte ROWS = 4; //four rows 
const byte COLS = 4; //four columns 
char hexaKeys[ROWS][COLS] = { 
{'1','2','3','A'}, 
{'4','5','6','B'}, //define the cymbols on the buttons of the keypads 
{'7','8','9','C'}, 
{'*','0','#','D'} 
}; 
byte rowPins[ROWS] = {13, 12, 11, 10}; //connect to the row pinouts of the   keypad 
byte colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the  keypad 


Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); //initialize an instance of class NewKeypad 

void setup() 
{ 
lcd.begin(16, 2); 
Serial.begin(9600); 
} 

void loop() 
{ 
char customKey = customKeypad.getKey(); 

if (customKey) 
{ 
//lcd.setCursor(1,1); 
lcd.print(customKey); 
delay(500); 
Serial.print(customKey); 
} 
} 

LCD屏蔽： http://www.maplin.co.uk/p/16x2-lcd-shield-for-arduino-n07dh

键盘： https://www.coolcomponents.co.uk/sealed-membrane-4-4-button-pad-with-sticker.html

感谢，希望有人可以提供帮助。

Answer 1

删除，如果条件和尝试。

#include <Keypad.h> 
#include <LiquidCrystal.h> // initialize the library with the numbers of the 

LiquidCrystal lcd(8, 9, 4, 5, 6, 7); 


const byte ROWS = 4; //four rows 
const byte COLS = 4; //four columns 
char hexaKeys[ROWS][COLS] = { 
{'1','2','3','A'}, 
{'4','5','6','B'}, //define the cymbols on the buttons of the keypads 
{'7','8','9','C'}, 
{'*','0','#','D'} 
}; 
byte rowPins[ROWS] = {13, 12, 11, 10}; //connect to the row pinouts of the   keypad 
byte colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the  keypad 


Keypad customKeypad = Keypad(makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS); //initialize an instance of class NewKeypad 

void setup() 
{ 
lcd.begin(16, 2); 
Serial.begin(9600); 
} 

void loop() 
{ 
char customKey = customKeypad.getKey(); 
//lcd.setCursor(1,1); 
lcd.print(customKey); 
delay(500); 
Serial.print(customKey); 

}