88 lines
2.5 KiB
C++
88 lines
2.5 KiB
C++
#pragma once
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#include "hardware/i2c.h"
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#include "hardware/gpio.h"
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#include "common/pimoroni_i2c.hpp"
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namespace pimoroni {
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class Trackball {
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//--------------------------------------------------
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// Constants
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//--------------------------------------------------
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public:
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static const uint8_t DEFAULT_I2C_ADDRESS = 0x0A;
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static const uint8_t I2C_ADDRESS_ALTERNATIVE = 0x0B;
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static const uint32_t DEFAULT_TIMEOUT = 5;
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private:
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static const uint16_t CHIP_ID = 0xBA11;
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static const uint8_t VERSION = 1;
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//--------------------------------------------------
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// Substructures
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//--------------------------------------------------
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public:
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struct State {
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uint8_t left;
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uint8_t right;
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uint8_t up;
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uint8_t down;
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bool sw_changed;
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bool sw_pressed;
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};
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//--------------------------------------------------
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// Variables
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//--------------------------------------------------
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private:
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I2C *i2c;
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int8_t address = DEFAULT_I2C_ADDRESS;
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uint interrupt = PIN_UNUSED;
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uint32_t timeout = DEFAULT_TIMEOUT;
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//--------------------------------------------------
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// Constructors/Destructor
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//--------------------------------------------------
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public:
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Trackball(uint8_t address = DEFAULT_I2C_ADDRESS) : i2c(new I2C()), address(address) {};
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Trackball(I2C *i2c, uint8_t address = DEFAULT_I2C_ADDRESS, uint interrupt = PIN_UNUSED, uint32_t timeout = DEFAULT_TIMEOUT) : i2c(i2c), address(address), interrupt(interrupt) {}
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// TODO remove MicroPython-binding compatibility constructors
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Trackball(i2c_inst_t *i2c_inst, uint8_t address, uint sda, uint scl, uint interrupt = PIN_UNUSED, uint32_t timeout = DEFAULT_TIMEOUT) : Trackball(new I2C(sda, scl), address, interrupt) {}
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//--------------------------------------------------
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// Methods
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//--------------------------------------------------
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public:
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bool init();
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i2c_inst_t* get_i2c() const;
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int get_address() const;
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int get_sda() const;
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int get_scl() const;
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int get_int() const;
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void change_address(uint8_t new_address);
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void enable_interrupt(bool use_interrupt = true);
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bool get_interrupt();
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void set_rgbw(uint8_t r, uint8_t g, uint8_t b, uint8_t w);
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void set_red(uint8_t value);
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void set_green(uint8_t value);
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void set_blue(uint8_t value);
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void set_white(uint8_t value);
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State read();
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private:
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void wait_for_flash();
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uint32_t millis();
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};
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}
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