pimoroni-pico/drivers/ltr559/ltr559.hpp

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5.5 KiB
C++

#pragma once
#include "hardware/gpio.h"
#include "common/pimoroni_common.hpp"
#include "common/pimoroni_i2c.hpp"
#include <vector>
#include <initializer_list>
#define LTR559_ALS_CONTROL 0x80
#define LTR559_ALS_CONTROL_GAIN_MASK 0b111
#define LTR559_ALS_CONTROL_GAIN_SHIFT 2
#define LTR559_ALS_CONTROL_SW_RESET_BIT 1
#define LTR559_ALS_CONTROL_MODE_BIT 0
#define LTR559_PS_CONTROL 0x81
#define LTR559_PS_CONTROL_SATURATION_INDICATOR_ENABLE_BIT 5
#define LTR559_PS_CONTROL_ACTIVE_MASK 0b11
#define LTR559_PS_LED 0x82
#define LTR559_PS_LED_PULSE_FREQ_MASK 0b111
#define LTR559_PS_LED_PULSE_FREQ_SHIFT 5
#define LTR559_PS_LED_DUTY_CYCLE_MASK 0b11
#define LTR559_PS_LED_DUTY_CYCLE_SHIFT 3
#define LTR559_PS_LED_CURRENT_MASK 0b111
#define LTR559_PS_N_PULSES 0x83
#define LTR559_PS_N_PULSES_MASK 0b1111
#define LTR559_PS_MEAS_RATE 0x84
#define LTR559_PS_MEAS_RATE_RATE_MS_MASK 0b1111
#define LTR559_ALS_MEAS_RATE 0x85
#define LTR559_ALS_MEAS_RATE_INTEGRATION_TIME_MASK 0b111
#define LTR559_ALS_MEAS_RATE_INTEGRATION_TIME_SHIFT 3
#define LTR559_ALS_MEAS_RATE_REPEAT_RATE_MASK 0b111
#define LTR559_PART_ID 0x86
#define LTR559_PART_ID_PART_NUMBER_MASK 0b1111
#define LTR559_PART_ID_PART_NUMBER_SHIFT 4
#define LTR559_PART_ID_REVISION_MASK 0b1111
#define LTR559_MANUFACTURER_ID 0x87
#define LTR559_ALS_DATA 0x88
#define LTR559_ALS_DATA_CH1 0x88
#define LTR559_ALS_DATA_CH0 0x8a
#define LTR559_ALS_PS_STATUS 0x8c
#define LTR559_ALS_PS_STATUS_INTERRUPT_MASK 0b00001010
#define LTR559_ALS_PS_STATUS_ALS_DATA_VALID_BIT 7
#define LTR559_ALS_PS_STATUS_ALS_GAIN_MASK 0b111
#define LTR559_ALS_PS_STATUS_ALS_GAIN_SHIFT 4
#define LTR559_ALS_PS_STATUS_ALS_INTERRUPT_BIT 3
#define LTR559_ALS_PS_STATUS_ALS_DATA_BIT 2
#define LTR559_ALS_PS_STATUS_PS_INTERRUPT_BIT 1
#define LTR559_ALS_PS_STATUS_PS_DATA_BIT 0
#define LTR559_PS_DATA 0x8d
#define LTR559_PS_DATA_MASK 0x07FF
#define LTR559_PS_DATA_SATURATION 0x8e
#define LTR559_PS_DATA_SATURATION_SHIFT 4
#define LTR559_INTERRUPT 0x8f
#define LTR559_INTERRUPT_POLARITY_BIT 2
#define LTR559_INTERRUPT_ALS_PS_MASK 0b11
#define LTR559_INTERRUPT_PS_BIT 0
#define LTR559_INTERRUPT_ALS_BIT 1
#define LTR559_PS_THRESHOLD_UPPER 0x90
#define LTR559_PS_THRESHOLD_LOWER 0x92
#define LTR559_PS_OFFSET 0x94
#define LTR559_PS_OFFSET_MASK 0x03FF
#define LTR559_ALS_THRESHOLD_UPPER 0x97
#define LTR559_ALS_THRESHOLD_LOWER 0x99
#define LTR559_INTERRUPT_PERSIST 0x9e
#define LTR559_INTERRUPT_PERSIST_PS_MASK 0b1111
#define LTR559_INTERRUPT_PERSIST_PS_SHIFT 4
#define LTR559_INTERRUPT_PERSIST_ALS_MASK 0b1111
#define LTR559_VALID_PART_ID 0x09
#define LTR559_VALID_REVISION_ID 0x02
namespace pimoroni {
typedef struct {
uint16_t proximity;
uint16_t als0;
uint16_t als1;
uint16_t integration_time;
uint16_t gain;
float ratio;
uint16_t lux;
} ltr559_reading;
class lookup {
private:
std::vector<uint16_t> lut;
public:
lookup(std::initializer_list<uint16_t> values);
uint8_t index(uint16_t value);
uint16_t value(uint8_t index);
};
class LTR559 {
//--------------------------------------------------
// Constants
//--------------------------------------------------
public:
static const uint8_t DEFAULT_I2C_ADDRESS = 0x23;
private:
const int ch0_c[4] = {17743, 42785, 5926, 0};
const int ch1_c[4] = {-11059, 19548, -1185, 0};
//--------------------------------------------------
// Variables
//--------------------------------------------------
public:
ltr559_reading data;
private:
I2C *i2c;
// interface pins with our standard defaults where appropriate
const uint8_t address = DEFAULT_I2C_ADDRESS;
uint interrupt = PIN_UNUSED;
static pimoroni::lookup lookup_led_current;
static pimoroni::lookup lookup_led_duty_cycle;
static pimoroni::lookup lookup_led_pulse_freq;
static pimoroni::lookup lookup_proximity_meas_rate;
static pimoroni::lookup lookup_light_integration_time;
static pimoroni::lookup lookup_light_repeat_rate;
static pimoroni::lookup lookup_light_gain;
//--------------------------------------------------
// Constructors/Destructor
//--------------------------------------------------
public:
LTR559() : LTR559(new I2C()) {};
LTR559(I2C *i2c, uint interrupt = PIN_UNUSED) : i2c(i2c), interrupt(interrupt) {}
// TODO remove MicroPython-binding compatibility constructors
LTR559(uint sda, uint scl, uint interrupt = PIN_UNUSED) : LTR559(new I2C(), interrupt) {}
//--------------------------------------------------
// Methods
//--------------------------------------------------
public:
bool init();
void reset();
i2c_inst_t* get_i2c() const;
int get_address() const;
int get_sda() const;
int get_scl() const;
int get_int() const;
uint8_t part_id();
uint8_t revision_id();
uint8_t manufacturer_id();
bool get_reading();
void interrupts(bool light, bool proximity);
void proximity_led(uint8_t current, uint8_t duty_cycle, uint8_t pulse_freq, uint8_t num_pulses);
void light_control(bool active, uint8_t gain);
void proximity_control(bool active, bool saturation_indicator);
void light_threshold(uint16_t lower, uint16_t upper);
void proximity_threshold(uint16_t lower, uint16_t upper);
void light_measurement_rate(uint16_t integration_time, uint16_t rate);
void proximity_measurement_rate(uint16_t rate);
void proximity_offset(uint16_t offset);
private:
uint16_t bit12_to_uint16(uint16_t value);
uint16_t uint16_to_bit12(uint16_t value);
};
}