unit_BH1750FVI_data.hpp File Reference

BH1750FVI data types (enums, constants, Data struct) More...

#include <cstdint>
#include <limits>

Go to the source code of this file.

Classes
struct	m5::unit::bh1750fvi::Data
	Measurement data group. More...

Namespaces
namespace	m5
	Top level namespace of M5Stack.
namespace	bh1750fvi
	For BH1750FVI.

Enumerations
enum class	m5::unit::bh1750fvi::Mode : uint8_t { Continuous , OneTime }
	Measurement mode. More...
enum class	m5::unit::bh1750fvi::Resolution : uint8_t { Low , High , High2 }
	Resolution of the measurement. More...

Variables
constexpr uint8_t	m5::unit::bh1750fvi::MTREG_MIN {31}
	Minimum value of MTREG (sensitivity register)
constexpr uint8_t	m5::unit::bh1750fvi::MTREG_MAX {254}
	Maximum value of MTREG.
constexpr uint8_t	m5::unit::bh1750fvi::MTREG_DEFAULT {69}
	Default value of MTREG.
constexpr float	m5::unit::bh1750fvi::SENSITIVITY_FACTOR_MIN {0.45f}
	Minimum sensitivity factor (MTREG_MIN / MTREG_DEFAULT)
constexpr float	m5::unit::bh1750fvi::SENSITIVITY_FACTOR_MAX {3.68f}
	Maximum sensitivity factor (MTREG_MAX / MTREG_DEFAULT)

Detailed Description

BH1750FVI data types (enums, constants, Data struct)

Split out from unit_BH1750FVI.hpp so pure formula tests can include it without pulling in M5UnitComponent (which is ESP32-only). Native (SDL) builds link data_test.cpp against these inline definitions.

Enumeration Type Documentation

Mode

enum class m5::unit::bh1750fvi::Mode : uint8_t

strong

Measurement mode.

Enumerator
Continuous	Continuous measurement. Sensor updates the data register periodically.
OneTime	One-time measurement. Sensor enters Power Down after the conversion completes.

Resolution

enum class m5::unit::bh1750fvi::Resolution : uint8_t

strong

Resolution of the measurement.

Note

High2 uses 0.5 lx resolution; raw is interpreted with an extra fractional bit.

Enumerator
Low	4 lx resolution, ~16 ms (max 24 ms) conversion time
High	1 lx resolution, ~120 ms (max 180 ms) conversion time
High2	0.5 lx resolution, ~120 ms (max 180 ms) conversion time