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104 lines
2.5 KiB
C
104 lines
2.5 KiB
C
/**
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* @file BH1750.h
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* @author Oleksii Kutuzov (oleksii.kutuzov@icloud.com)
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* @brief
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* @version 0.1
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* @date 2022-11-06
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*
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* @copyright Copyright (c) 2022
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*
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* Ported from:
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* https://github.com/lamik/Light_Sensors_STM32
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*/
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#include <furi.h>
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#include <furi_hal.h>
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#ifndef BH1750_H_
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#define BH1750_H_
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// I2C BUS
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#define I2C_BUS &furi_hal_i2c_handle_external
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#define I2C_TIMEOUT 10
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#define BH1750_ADDRESS (0x23 << 1)
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#define BH1750_POWER_DOWN 0x00
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#define BH1750_POWER_ON 0x01
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#define BH1750_RESET 0x07
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#define BH1750_DEFAULT_MTREG 69
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#define BH1750_DEFAULT_MODE ONETIME_HIGH_RES_MODE
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#define BH1750_CONVERSION_FACTOR 1.2
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typedef enum { BH1750_OK = 0, BH1750_ERROR = 1 } BH1750_STATUS;
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typedef enum {
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CONTINUOUS_HIGH_RES_MODE = 0x10,
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CONTINUOUS_HIGH_RES_MODE_2 = 0x11,
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CONTINUOUS_LOW_RES_MODE = 0x13,
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ONETIME_HIGH_RES_MODE = 0x20,
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ONETIME_HIGH_RES_MODE_2 = 0x21,
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ONETIME_LOW_RES_MODE = 0x23
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} BH1750_mode;
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/**
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* @brief Initialize the sensor. Sends the reset command and sets the measurement register to the default value.
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*
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_init();
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/**
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* @brief Reset all registers to the default value.
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*
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_reset();
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/**
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* @brief Sets the power state. 1 - running; 0 - sleep, low power.
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*
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* @param PowerOn sensor state.
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_set_power_state(uint8_t PowerOn);
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/**
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* @brief Set the Measurement Time register. It allows to increase or decrease the sensitivity.
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*
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* @param MTreg value from 31 to 254, defaults to 69.
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*
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_set_mt_reg(uint8_t MTreg);
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/**
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* @brief Set the mode of converting. Look into the bh1750_mode enum.
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*
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* @param Mode mode enumerator
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_set_mode(BH1750_mode Mode);
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/**
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* @brief Trigger the conversion in manual modes.
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*
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* @details a low-resolution mode, the conversion time is typically 16 ms, and for a high-resolution
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* mode is 120 ms. You need to wait until reading the measurement value. There is no need
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* to exit low-power mode for manual conversion. It makes automatically.
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*
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_trigger_manual_conversion();
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/**
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* @brief Read the converted value and calculate the result.
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*
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* @param Result stores received value to this variable.
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* @return BH1750_STATUS
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*/
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BH1750_STATUS bh1750_read_light(float* Result);
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#endif /* BH1750_H_ */
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