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5ff8c904c8
Implements an input driver utilising the MPR121 Touch IC and is compatible with common MPR121 keypad PCB's. - Implements a "candybar" phone style 12-key keypad - multiple taps to rotate through the character set - longpress for navigation keys - keymap to allow arbitrary routing of MPR121 pin to button configuration - extendable to other key functions - Integrates with the existing kbI2cBase implementation - Works with CannedMessageModule Freetext mode - Can be used with common MPR121 boards, such as https://www.amazon.com/MPR121-Capacitive-Keyboard-Buttons-Sensitive/dp/B083R89CHB/ref=sr_1_6 - Of use for PCB based radios, where some form of low surface area low component freetext input is required, but also without consuming too many IO pins. - Tested on a T3S3 connected to Wire1 (Second) interface. - Demonstration of functionality: https://youtu.be/UI6QP6nGvhY
56 lines
1.3 KiB
C++
56 lines
1.3 KiB
C++
// Based on the BBQ10 Keyboard
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#include "concurrency/NotifiedWorkerThread.h"
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#include "configuration.h"
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#include <Wire.h>
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#include <main.h>
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class MPR121Keyboard
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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 MPR121States { Init = 0, Idle, Held, HeldLong, Busy };
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MPR121States state;
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int8_t last_key;
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uint32_t last_tap;
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uint8_t char_idx;
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String queue;
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MPR121Keyboard();
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void begin(uint8_t addr = MPR121_KB_ADDR, TwoWire *wire = &Wire);
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void begin(i2c_com_fptr_t r, i2c_com_fptr_t w, uint8_t addr = MPR121_KB_ADDR);
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void reset(void);
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void attachInterrupt(uint8_t pin, void (*func)(void)) const;
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void detachInterrupt(uint8_t pin) const;
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void trigger(void);
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void pressed(uint16_t value);
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void held(uint16_t value);
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void released(void);
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uint8_t status(void) const;
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uint8_t keyCount(void) const;
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uint8_t keyCount(uint16_t value) const;
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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 readRegister8(uint8_t reg) const;
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uint16_t readRegister16(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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}; |