pimoroni-pico/drivers/trackball/trackball.hpp

88 wiersze
2.5 KiB
C++

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