{"id":2798,"date":"2018-05-20T11:42:59","date_gmt":"2018-05-20T03:42:59","guid":{"rendered":"https:\/\/drho.club\/?p=2153"},"modified":"2018-05-20T11:42:59","modified_gmt":"2018-05-20T03:42:59","slug":"arduino-4x4-keypad-module","status":"publish","type":"post","link":"https:\/\/104.es\/index.php\/2018\/05\/20\/arduino-4x4-keypad-module\/","title":{"rendered":"\u3010Arduino\u30114×4\u6309\u9215\u6a21\u7d44\u5be6\u7fd2"},"content":{"rendered":"

\u6709\u4e9b\u6642\u5019\u6211\u5011\u7684\u5c08\u984c\u88fd\u4f5c\u9700\u8981\u6709\u53ef\u4ee5\u8f38\u5165\u8cc7\u6599\u7684\u4ecb\u9762\uff0c\u5c0d\u65bcArduino\u4f86\u8aaa\u7576\u7136\u4e0d\u80fd\u76f4\u63a5\u52a0\u4e0a\u96fb\u8166\u7684\u9375\u76e4\uff0c\u800c\u4e14\u5225\u5fd8\u4e86\uff0c\u5728\u958b\u767c\u968e\u6bb5\u6642Arduino\u662f\u9023\u63a5\u5230\u96fb\u8166\uff0c\u53ef\u4ee5\u4f7f\u7528\u96fb\u8166\u7684\u9375\u76e4\u8f38\u5165\u6c92\u932f\uff0c\u4f46\u662f\u4e00\u65e6\u5728\u7522\u54c1\u968e\u6bb5\u6642\uff0cArduino\u4e0d\u4f46\u5931\u53bb\u4e86\u96fb\u8166\u87a2\u5e55\uff0c\u7576\u7136\u4e5f\u5c31\u6c92\u6709\u96fb\u8166\u7684\u9375\u76e4\u53ef\u4ee5\u4f7f\u7528\u4e86\uff0c\u6240\u4ee5\u5728\u5be6\u7528\u4e0a\uff0c\u5982\u679c\u9700\u8981\u8f38\u5165\u6578\u5b57\u8cc7\u6599\uff0c\u901a\u5e38\u6211\u5011\u6703\u53bb\u627e\u4e00\u500b\u6578\u5b57\u9375\u76e4\u6a21\u7d44\u4f86\u4f7f\u7528\u3002\u800c\u5728\u9019\u4e9b\u6a21\u7d44\u4e2d\uff0c\u6700\u5e38\u7528\u7684\u662f\u5982\u4e0b\u9762\u6240\u793a\u7684\u9019\u7a2e\uff1a<\/p>\n

\"\"<\/a><\/p>\n

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\"\"<\/a><\/p>\n

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\"\"<\/a><\/p>\n

\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5206\u5225\u628a\u9019\u4e9b\u63a5\u8173\u9023\u63a5\u52302, 3, 4, 5, 6, 7, 8, 9\u9019\u5e7e\u500bGPIO\u63a5\u8173\u4e0a\uff0c\u8981\u7559\u610f\u7684\u662f\uff0c\u9019\u500b\u6a21\u7d44\u4e26\u4e0d\u9700\u8981\u4f9b\u7d66\u96fb\u6e90\uff0c\u53ea\u8981\u9019\u5e7e\u652f\u63a5\u8173\u5c31\u597d\u4e86\uff0c\u9023\u63a5\u5b8c\u7562\u4e4b\u5f8c\uff0c\u4f7f\u7528\u4ee5\u4e0b\u7684\u7a0b\u5f0f\u5373\u53ef\u5728\u76e3\u63a7\u8996\u7a97\u4e2d\u89c0\u5bdf\u6bcf\u4e00\u500b\u6309\u9215\u6309\u4e0b\u53bb\u4e4b\u5f8c\u6703\u5c0d\u61c9\u7684\u6578\u5b57\u548c\u6587\u5b57\uff08\u8acb\u5230\u9019\u88e1\u53bb\u4e0b\u8f09Keypad.h<\/a>\uff09\uff1a<\/p>\n

[code]
\n#include <Keypad.h>
\nconst byte ROWS = 4;
\nconst byte COLS = 4;
\nchar keys[ROWS][COLS] = {
\n {‘1′,’2′,’3′,’A’},
\n {‘4′,’5′,’6′,’B’},
\n {‘7′,’8′,’9′,’C’},
\n {‘*’,’0′,’#’,’D’}
\n};
\nbyte rowPins[ROWS] = {2,3,4,5};
\nbyte colPins[COLS] = {6,7,8,9};
\nKeypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
\nvoid setup(){
\n Serial.begin(9600);
\n}
\nvoid loop(){
\n char key = keypad.getKey();
\n if (key != NO_KEY){
\n Serial.println(key);
\n }
\n}
\n[\/code]<\/p>\n

\u9019\u500b\u7a0b\u5f0f\u4e2d\u6700\u91cd\u8981\u7684\u5730\u65b9\u662f\u4e00\u958b\u59cb\u532f\u5165Keypad.h\u6a19\u982d\u6a94\u7684\u5730\u65b9\uff0c\u532f\u5165\u4e4b\u5f8c\u624d\u80fd\u5920\u4f7f\u7528Keypad keypad\u9019\u500b\u5be6\u4f8b\u5ba3\u544a\u6307\u4ee4\u4ee5\u5efa\u7acb\u9019\u500b\u6a21\u7d44\u7684\u8655\u7406\u4ecb\u9762\u7a0b\u5f0f\u3002\u6b64\u5916\uff0c\u5e38\u6578ROWS\u4ee5\u53caCOLS\u5ba3\u544a\u4e86\u5217\u548c\u884c\u7684\u6578\u91cf\uff0ckeys\u5b57\u5143\u9663\u5217\u5ba3\u544a\u6bcf\u4e00\u500b\u6309\u9215\u88ab\u6309\u4e0b\u53bb\u6240\u4ee3\u8868\u7684\u5b57\u5143\uff0c\u4f60\u53ef\u4ee5\u81ea\u7531\u4e5f\u8b8a\u66f4\u9019\u88e1\u9762\u7684\u5167\u5bb9\u3002\u6211\u5011\u5728\u9023\u63a5Arduino\u548c\u9019\u500b\u9375\u76e4\u7684\u6642\u5019\u6240\u9078\u7528\u7684\u9023\u7dda\u9806\u5e8f\u6703\u5f71\u97ff\u5230\u5be6\u969b\u5c0d\u61c9\u7684\u6309\u9375\u5167\u5bb9\uff0c\u5c0d\u7b46\u8005\u4f86\u8aaa\uff0c\u5148\u628a\u7dda\u9023\u63a5\u597d\uff0c\u5982\u679c\u6309\u9215\u5c0d\u61c9\u51fa\u4f86\u7684\u5b57\u5143\u4e0d\u662f\u81ea\u5df1\u60f3\u8981\u7684\uff0c\u518d\u53bb\u4fee\u6539\u9019\u500b\u9663\u5217\u7684\u5167\u5bb9\u5c31\u597d\u4e86\uff0c\u4e0d\u9700\u8981\u518d\u91cd\u65b0\u9023\u7dda\u5594\u3002<\/p>\n

\u53e6\u5916\uff0crowPins\u4ee5\u53cacolPins\u662f\u5b9a\u7fa9\u5728Arduino\u4e2d\u8cc7\u6599\u9023\u63a5\u8173\u4f4d\u7684\u865f\u78bc\uff0c\u5982\u679c\u4f60\u4e0d\u662f\u9023\u63a5\u52302~9\u7684\u8a71\uff0c\u8a18\u5f97\u8981\u4f86\u9019\u88e1\u6539\u4e00\u4e0b\u3002\u4e3b\u7a0b\u5f0f\u4e2d\u6703\u4e00\u76f4\u76e3\u6e2c\u662f\u5426\u6709\u6309\u9375\u88ab\u6309\u4e0b\uff0c\u5982\u679c\u6709\u7684\u8a71\uff0c\u5c31\u76f4\u63a5\u628a\u5c0d\u61c9\u7684\u5b57\u5143\u8f38\u51fa\u5230\u76e3\u63a7\u8996\u7a97\u4e2d\u3002<\/p>\n

\u90a3\u9ebc\uff0c\u5982\u679c\u8981\u8f38\u5165\u4e00\u9023\u4e32\u7684\u6578\u5b57\u6216\u6587\u5b57\uff0c\u76f4\u5230\u6309\u4e0b#\u4e4b\u5f8c\u624d\u505c\u6b62\u5462\uff1f\u7a0b\u5f0f\u78bc\u53ef\u4ee5\u6539\u70ba\u5982\u4e0b\uff1a<\/p>\n

[code]
\n#include <Keypad.h>
\nconst byte ROWS = 4;
\nconst byte COLS = 4;
\nchar keys[ROWS][COLS] = {
\n {‘1′,’2′,’3′,’A’},
\n {‘4′,’5′,’6′,’B’},
\n {‘7′,’8′,’9′,’C’},
\n {‘*’,’0′,’#’,’D’}
\n};
\nbyte rowPins[ROWS] = {2,3,4,5};
\nbyte colPins[COLS] = {6,7,8,9};
\nKeypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
\nvoid setup(){
\n Serial.begin(9600);
\n}<\/p>\n

char buf[100];
\nint count;
\nboolean quit;
\nvoid loop(){
\n char key = keypad.getKey();
\n if (key != NO_KEY){
\n count = 0;
\n if(key != ‘#’) {
\n Serial.println(key);
\n quit = false;
\n buf[count++] = key;
\n while (!quit) {
\n key = keypad.getKey();
\n if(key != NO_KEY) {
\n if(key == ‘#’) {
\n quit = true;
\n buf[count] = ‘\0’;
\n } else {
\n buf[count++] = key;
\n }
\n Serial.println(key);
\n }
\n }
\n Serial.print("Your input is ");
\n Serial.println(buf);
\n }
\n }
\n}
\n[\/code]<\/p>\n

\u5728\u9019\u500b\u7a0b\u5f0f\u4e2d\uff0c\u53ea\u8981\u6309\u9375\u7684\u5167\u5bb9\u4e0d\u662f’#’\uff0c\u5c31\u6703\u958b\u59cb\u628a\u6bcf\u4e00\u500b\u5b57\u5143\u8a18\u9304\u5230buf\u9019\u500b\u5b57\u5143\u9663\u5217\u4e2d\uff0c\u76f4\u63a5\u518d\u6b21\u6309\u4e0b’#’\u4e4b\u5f8c\uff0c\u5c31\u6703\u628a\u8f38\u5165\u7684\u5b57\u5143\u96c6\u5408\u5728\u4e00\u4e32\u8f38\u51fa\u5230\u76e3\u63a7\u8996\u7a97\u4e2d\uff0c\u900f\u904e\u9019\u500b\u65b9\u6cd5\uff0c\u540c\u5b78\u5011\u5c31\u53ef\u4ee5\u5efa\u7acb\u4e00\u500b\u5728Arduino\u4e2d\u53ef\u4ee5\u8f38\u5165\u6578\u5b57\u7684\u9375\u76e4\u4ecb\u9762\u4e86\u3002\u57f7\u884c\u7684\u7d50\u679c\u5982\u4e0b\u6240\u793a\uff1a<\/p>\n

\"\"<\/a><\/p>\n

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\"\"<\/a><\/p>\n

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[code]
\n#include "Wire.h"
\n#include "LiquidCrystal_I2C.h"
\n#include <Keypad.h>
\nconst byte ROWS = 4;
\nconst byte COLS = 4;
\nchar keys[ROWS][COLS] = {
\n {‘D’,’C’,’B’,’A’},
\n {‘#’,’9′,’6′,’3′},
\n {‘0′,’8′,’5′,’2’},
\n {‘*’,’7′,’4′,’1′}
\n};
\nbyte rowPins[ROWS] = {2,3,4,5};
\nbyte colPins[COLS] = {6,7,8,9};
\nKeypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
\nLiquidCrystal_I2C lcd(0x27,2,1,0,4,5,6,7,3,POSITIVE);<\/p>\n

void setup() {
\n Serial.begin(9600);
\n lcd.begin(16,2);
\n lcd.backlight();
\n delay(1000);
\n lcd.setCursor(0, 0);
\n lcd.print("Your pin code:");
\n}
\nchar buf[100];
\nint count;
\nboolean quit;
\nvoid loop() {
\n char key = keypad.getKey();
\n if (key != NO_KEY){
\n count = 0;
\n lcd.setCursor(0,1);
\n lcd.print(" ");
\n lcd.setCursor(0,1);
\n if(key != ‘#’) {
\n Serial.println(key);
\n lcd.print(key);
\n quit = false;
\n buf[count++] = key;
\n while (!quit) {
\n key = keypad.getKey();
\n if(key != NO_KEY) {
\n if(key == ‘#’) {
\n quit = true;
\n buf[count] = ‘\0’;
\n } else {
\n buf[count++] = key;
\n }
\n lcd.print(key);
\n Serial.println(key);
\n }
\n }
\n Serial.print("Your input is ");
\n Serial.println(buf);
\n lcd.setCursor(0, 1);
\n lcd.print(" ");
\n lcd.setCursor(0, 1);
\n lcd.print(buf);
\n }
\n }
\n}
\n[\/code]<\/p>\n

\u4e0a\u8ff0\u7a0b\u5f0f\u5c31\u5177\u6709\u53ef\u4ee5\u8f38\u5165\u6578\u5b57\u6216\u6587\u5b57\u5167\u5bb9\uff0c\u4e26\u628a\u5b83\u7d44\u5408\u6210\u4e00\u500b\u5b57\u4e32\u7d66\u5f8c\u7e8c\u7684\u7a0b\u5f0f\u78bc\u4e2d\u4f7f\u7528\u4e86\u3002\u793a\u7bc4\u5f71\u7247\u5982\u4e0b\uff1a<\/p>\n