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https://github.com/RobTillaart/Arduino.git
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58 lines
1.1 KiB
C++
58 lines
1.1 KiB
C++
#pragma once
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//
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// FILE: I2CKeyPad.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.3.1
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// PURPOSE: Arduino library for 4x4 KeyPad connected to an I2C PCF8574
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// URL: https://github.com/RobTillaart/I2CKeyPad
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#include "Arduino.h"
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#include "Wire.h"
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#define I2C_KEYPAD_LIB_VERSION (F("0.3.1"))
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#define I2C_KEYPAD_NOKEY 16
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#define I2C_KEYPAD_FAIL 17
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class I2CKeyPad
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{
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public:
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I2CKeyPad(const uint8_t deviceAddress, TwoWire *wire = &Wire);
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#if defined(ESP8266) || defined(ESP32)
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bool begin(uint8_t sda, uint8_t scl);
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#endif
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bool begin();
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// get raw key's 0..15
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uint8_t getKey();
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uint8_t getLastKey() { return _lastKey; };
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bool isPressed();
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bool isConnected();
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// get 'translated' keys
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// user must load KeyMap self, there is no check.
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uint8_t getChar() { return _keyMap[getKey()]; };
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uint8_t getLastChar() { return _keyMap[_lastKey]; };
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void loadKeyMap(char * keyMap); // char[19]
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protected:
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uint8_t _address;
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uint8_t _lastKey;
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uint8_t _read(uint8_t mask);
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uint8_t _getKey4x4();
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TwoWire* _wire;
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char * _keyMap = NULL;
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};
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// -- END OF FILE --
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