mirror of
https://github.com/RobTillaart/Arduino.git
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74 lines
1.4 KiB
C++
74 lines
1.4 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: 0.3.2
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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("0.3.2"))
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#define I2C_KEYPAD_NOKEY 16
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#define I2C_KEYPAD_FAIL 17
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// experimental
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#define I2C_KEYPAD_4x4 44
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#define I2C_KEYPAD_5x3 53
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#define I2C_KEYPAD_6x2 62
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#define I2C_KEYPAD_8x1 81
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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();
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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, there is no check.
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uint8_t getChar();
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uint8_t getLastChar();
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void loadKeyMap(char * keyMap); // char[19]
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// mode functions - experimental
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void setKeyPadMode(uint8_t mode = I2C_KEYPAD_4x4);
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uint8_t getKeyPadMode();
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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 _mode;
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uint8_t _read(uint8_t mask);
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uint8_t _getKey4x4();
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// experimental - could be public ?!
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uint8_t _getKey5x3();
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uint8_t _getKey6x2();
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uint8_t _getKey8x1();
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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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