Example #include <Keypad.h> const byte ROWS = 4; //four rows const byte COLS = 3; //three columns char keys[ROWS][COLS] = { {‘1’,‘2’,‘3’}, {‘4’,‘5’,‘6’}, {‘7’,‘8’,‘9’}, {’#’,‘0’,’*’} };
B（蓝色引脚）→12；Arduino Code 向上滑动查看Arduino源代码 #include <Keypad.h> //引入Keypad.h函数库 const byte ROWS = 4; //定义矩阵键盘的行数：4行 const byte COLS = 4; //定义矩阵键盘的列数：4列 char keys[ROWS][COLS] = { {'1', '2', '3', 'A'},{'4', '5', '6', 'B'...
还要检查是否已安装LiquidCrystal库。如果没有,您可以使用相同的方法找到它。 安装库并重新启动IDE。 现在复制下面的代码并将其粘贴到IDE中。将其上传到arduino。 (可以从下面下载4x3的代码):- 此代码将帮助您检查键盘的工作情况,它显示在串行监视器上按下的按钮。 /*Code for 4x4 keypad*/ #include const byte ...
首先，我们来看看四个按钮会发生什么。不使用矩阵，每个开关将得到一个输入引脚。这个数字可能听起来不错...
从下面下载Keypad.h的库：下载Keypad.h库 代码下载：main.rar(1.73 KB, 下载次数: 289)...
Keypad kpd = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS ); #define ledpin 13 void setup() { pinMode(ledpin,OUTPUT); digitalWrite(ledpin, HIGH); Serial.begin(9600); } void loop() { char key = kpd.getKey();
begin(9600); } void loop(){ char customKey = customKeypad.getKey(); if (customKey){ Serial.println(customKey); } } 发布者:全栈程序员栈长,转载请注明出处:https://javaforall.cn/134585.html原文链接:https://javaforall.cn 本文参与 腾讯云自媒体同步曝光计划,分享自作者个人站点/博客。 原始...
[See File -> Examples -> Keypad -> Examples -> CustomKeypad] char waitForKey() This function will wait forever until someone presses a key. Warning: It blocks all other code until a key is pressed. That means no blinking LED's, no LCD screen updates, no nothing with the exception of...
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character date and strings. In addition to the LCD display we will scan a keypad, use hardware interrupts, all connected through a single PCA9555 module. In addition I'll reveal some code little discussed with Arduino and we will convert/manipulate code for output to the LCD display. See...