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#pragma once
#include <stddef.h>
#include <stdint.h>
namespace TemperatureSensorTiming
{
constexpr auto START_SIGNAL_TIME_MILLIS = 18U;
constexpr auto RESPONSE_SIGNAL_WAIT_TIME_MICROS = 40U;
constexpr auto RESPONSE_SIGNAL_TIME_MICROS = 80U;
constexpr auto START_TO_TRANSMIT_SIGNAL_TIME_MICROS = 50U;
constexpr auto DATA_TRANSMIT_TIMEOUT_MICROS = 80U;
} // namespace TemperatureSensorTiming
constexpr auto TEMPERATURE_SENSOR_RESPONSE_DATA_BYTE_CNT = 5U;
constexpr auto BITS_IN_BYTE = 8U;
enum class TemperatureSensorStatus
{
OK,
LOW_RESPONSE_SIGNAL_TIMEOUT,
HIGH_RESPONSE_SIGNAL_TIMEOUT,
START_TO_TRANSMIT_SIGNAL_TIMEOUT,
DATA_TRANSMIT_TIMEOUT,
CHECKSUM_ERROR
};
class TemperatureSensor
{
public:
explicit TemperatureSensor(uint8_t pin) noexcept;
auto read_temperature() noexcept -> TemperatureSensorStatus;
auto temperature() const noexcept -> uint8_t;
private:
const uint8_t _pin;
uint8_t _temperature{};
auto _wait_read(uint8_t level, size_t timeout_micros) noexcept -> bool;
void _restore_pin() noexcept;
};
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