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83 lines
2.2 KiB
C
83 lines
2.2 KiB
C
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// Based on the MPR121 Keyboard and Adafruit TCA8418 library
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#include "configuration.h"
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#include <Wire.h>
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#define _TCA8418_NONE 0x00
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#define _TCA8418_REBOOT 0x90
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#define _TCA8418_LEFT 0xb4
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#define _TCA8418_UP 0xb5
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#define _TCA8418_DOWN 0xb6
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#define _TCA8418_RIGHT 0xb7
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#define _TCA8418_ESC 0x1b
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#define _TCA8418_BSP 0x08
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#define _TCA8418_SELECT 0x0d
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class TCA8418Keyboard
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{
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public:
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typedef uint8_t (*i2c_com_fptr_t)(uint8_t dev_addr, uint8_t reg_addr, uint8_t *data, uint8_t len);
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enum KeyState { Init = 0, Idle, Held, Busy };
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KeyState state;
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int8_t last_key;
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bool should_backspace;
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uint32_t last_tap;
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uint8_t char_idx;
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int32_t tap_interval;
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bool backlight_on;
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String queue;
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TCA8418Keyboard();
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void begin(uint8_t addr = XPOWERS_AXP192_AXP2101_ADDRESS, TwoWire *wire = &Wire);
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void begin(i2c_com_fptr_t r, i2c_com_fptr_t w, uint8_t addr = XPOWERS_AXP192_AXP2101_ADDRESS);
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void reset(void);
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// Configure the size of the keypad.
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// All other rows and columns are set as inputs.
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bool matrix(uint8_t rows, uint8_t columns);
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// Flush all events in the FIFO buffer + GPIO events.
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uint8_t flush(void);
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// Key events available in the internal FIFO buffer.
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uint8_t keyCount(void) const;
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void trigger(void);
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void pressed(uint8_t key);
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void released(void);
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bool hasEvent(void);
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char dequeueEvent(void);
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void queueEvent(char);
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uint8_t digitalRead(uint8_t pinnum) const;
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bool digitalWrite(uint8_t pinnum, uint8_t level);
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bool pinMode(uint8_t pinnum, uint8_t mode);
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bool pinIRQMode(uint8_t pinnum, uint8_t mode); // MODE FALLING or RISING
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// enable / disable interrupts for matrix and GPI pins
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void enableInterrupts();
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void disableInterrupts();
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// ignore key events when FIFO buffer is full or not.
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void enableMatrixOverflow();
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void disableMatrixOverflow();
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// debounce keys.
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void enableDebounce();
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void disableDebounce();
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void setBacklight(bool on);
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uint8_t readRegister(uint8_t reg) const;
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void writeRegister(uint8_t reg, uint8_t value);
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private:
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TwoWire *m_wire;
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uint8_t m_addr;
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i2c_com_fptr_t readCallback;
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i2c_com_fptr_t writeCallback;
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};
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