pimoroni-pico/drivers/bme280/bme280.hpp

82 wiersze
2.8 KiB
C++

#pragma once
#include "hardware/i2c.h"
#include "hardware/gpio.h"
#include "src/bme280.h"
#include "src/bme280_defs.h"
#include "stdio.h"
#include "common/pimoroni_i2c.hpp"
namespace pimoroni {
class BME280 {
public:
static const uint8_t DEFAULT_I2C_ADDRESS = 0x76;
static const uint8_t ALTERNATE_I2C_ADDRESS = 0x77;
static const uint8_t DEFAULT_INT_PIN = I2C_DEFAULT_INT;
struct i2c_intf_ptr {
I2C *i2c;
int8_t address;
};
struct bme280_reading {
float temperature;
float pressure;
float humidity;
bool status;
};
bool debug = false;
bool init();
bool configure(uint8_t filter, uint8_t standby_time, uint8_t os_pressure, uint8_t os_temp, uint8_t os_humidity, uint8_t mode=BME280_NORMAL_MODE);
BME280() : BME280(new I2C()) {}
BME280(uint8_t address) : BME280(new I2C(), address) {}
BME280(I2C *i2c, uint8_t address = DEFAULT_I2C_ADDRESS, uint interrupt = PIN_UNUSED) : i2c(i2c), address(address), interrupt(interrupt) {}
// For print access in micropython
I2C* get_i2c() const;
int get_int() const;
bme280_reading read();
BME280::bme280_reading read_forced();
// Bindings for bme280_dev
static int8_t write_bytes(uint8_t reg_addr, uint8_t *reg_data, uint16_t length, void *intf_ptr) {
BME280::i2c_intf_ptr* i2c = (BME280::i2c_intf_ptr *)intf_ptr;
uint8_t buffer[length + 1];
buffer[0] = reg_addr;
for(int x = 0; x < length; x++) {
buffer[x + 1] = reg_data[x];
}
int result = i2c->i2c->write_blocking(i2c->address, buffer, length + 1, false);
return result == PICO_ERROR_GENERIC ? BME280_E_COMM_FAIL : BME280_OK;
};
static int8_t read_bytes(uint8_t reg_addr, uint8_t *reg_data, uint16_t length, void *intf_ptr) {
BME280::i2c_intf_ptr* i2c = (BME280::i2c_intf_ptr *)intf_ptr;
int result = i2c->i2c->write_blocking(i2c->address, &reg_addr, 1, true);
result = i2c->i2c->read_blocking(i2c->address, reg_data, length, false);
return result == PICO_ERROR_GENERIC ? BME280_E_COMM_FAIL : BME280_OK;
};
static void delay_us(uint32_t period, void *intf_ptr) {
sleep_us(period);
}
private:
bme280_dev device;
I2C *i2c;
// interface pins with our standard defaults where appropriate
int8_t address = DEFAULT_I2C_ADDRESS;
uint interrupt = DEFAULT_INT_PIN;
};
}