BM8563

The Bm8563 component provides a driver for the Bm8563 RTC chip.

BM8563 Example
- How to use example
  - Hardware Required
  - Build and Flash
- Example Output

API Reference

Header File

components/bm8563/include/bm8563.hpp

Classes

class Bm8563 : public espp::BasePeripheral<>

The BM8563 RTC driver.

This driver is for the BM8563 RTC chip.

Example

    // make the I2C that we'll use to communicate
    espp::I2c i2c({
        .port = I2C_NUM_0,
        .sda_io_num = (gpio_num_t)CONFIG_EXAMPLE_I2C_SDA_GPIO,
        .scl_io_num = (gpio_num_t)CONFIG_EXAMPLE_I2C_SCL_GPIO,
        .sda_pullup_en = GPIO_PULLUP_ENABLE,
        .scl_pullup_en = GPIO_PULLUP_ENABLE,
    });
    // now make the bm8563
    auto bm8563 = espp::Bm8563({
        .write = std::bind(&espp::I2c::write, &i2c, std::placeholders::_1, std::placeholders::_2,
                           std::placeholders::_3),
        .write_then_read =
            std::bind(&espp::I2c::write_read, &i2c, std::placeholders::_1, std::placeholders::_2,
                      std::placeholders::_3, std::placeholders::_4, std::placeholders::_5),
    });

    std::error_code ec;

    // set the time
    espp::Bm8563::DateTime date_time = {.date =
                                            {
                                                .year = 2023,
                                                .month = 11,
                                                .weekday = 4,
                                                .day = 23,
                                            },
                                        .time = {.hour = 8, .minute = 15, .second = 30}};
    bm8563.set_date_time(date_time, ec);
    if (ec) {
      fmt::print("Error setting date time: {}\n", ec.message());
    } else {
      fmt::print("Date time set to {}\n", date_time);
    }

    // and finally, make the task to periodically poll the bm8563 and print
    // the state
    auto task_fn = [&bm8563](std::mutex &m, std::condition_variable &cv) {
      std::error_code ec;
      // Get the date time and print it
      auto date_time = bm8563.get_date_time(ec);
      if (ec) {
        fmt::print("Error getting date time: {}\n", ec.message());
      } else {
        fmt::print("Date time is {}\n", date_time);
      }
      // NOTE: sleeping in this way allows the sleep to exit early when the
      // task is being stopped / destroyed
      {
        std::unique_lock<std::mutex> lk(m);
        cv.wait_for(lk, 1s);
      }
      return false; // don't stop the task
    };
    auto task = espp::Task({.callback = task_fn,
                            .task_config = {.name = "BM8563 Task"},
                            .log_level = espp::Logger::Verbosity::WARN});
    task.start();

Public Types

typedef std::function<bool(uint8_t)> probe_fn

Function to probe the peripheral

Param address:: The address to probe
Return:: True if the peripheral is found at the given address

Public Functions

inline explicit Bm8563(const Config &config)

Constructor.

Parameters:: config – The configuration.

inline DateTime get_date_time(std::error_code &ec)

Get the date and time.

Parameters:: ec – The error code.
Returns:: The date and time.

inline void set_date_time(const DateTime &dt, std::error_code &ec)

Set the date and time.

Parameters:

dt – The date and time.
ec – The error code.

inline Date get_date(std::error_code &ec)

Get the date.

Parameters:: ec – The error code.
Returns:: The date.

inline void set_date(const Date &d, std::error_code &ec)

Set the date.

Parameters:

d – The date.
ec – The error code.

inline Time get_time(std::error_code &ec)

Get the time.

Parameters:: ec – The error code.
Returns:: The time.

inline void set_time(const Time &t, std::error_code &ec)

Set the time.

Parameters:

t – The time.
ec – The error code.

inline bool probe(std::error_code &ec)

Probe the peripheral

Note

This function is thread safe

Note

If the probe function is not set, this function will return false and set the error code to operation_not_supported

Note

This function is only available if UseAddress is true

Parameters:: ec – The error code to set if there is an error
Returns:: True if the peripheral is found

inline void set_address(uint8_t address)

Set the address of the peripheral

Note

This function is thread safe

Note

This function is only available if UseAddress is true

Parameters:: address – The address of the peripheral

inline void set_probe(const probe_fn &probe)

Set the probe function

Note

This function is thread safe

Note

This should rarely be used, as the probe function is usually set in the constructor. If you need to change the probe function, consider using the set_config function instead.

Note

This function is only available if UseAddress is true

Parameters:: probe – The probe function

inline void set_write(const write_fn &write)

Set the write function

Note

This function is thread safe

Note

This should rarely be used, as the write function is usually set in the constructor. If you need to change the write function, consider using the set_config function instead.

Parameters:: write – The write function

inline void set_read(const read_fn &read)

Set the read function

Note

This function is thread safe

Note

This should rarely be used, as the read function is usually set in the constructor. If you need to change the read function, consider using the set_config function instead.

Parameters:: read – The read function

inline void set_read_register(const read_register_fn &read_register)

Set the read register function

Note

This function is thread safe

Note

This should rarely be used, as the read register function is usually set in the constructor. If you need to change the read register function, consider using the set_config function instead.

Parameters:: read_register – The read register function

inline void set_write_then_read(const write_then_read_fn &write_then_read)

Set the write then read function

Note

This function is thread safe

Note

This should rarely be used, as the write then read function is usually set in the constructor. If you need to change the write then

Parameters:: write_then_read – The write then read function

inline void set_separate_write_then_read_delay(const std::chrono::milliseconds &delay)

Set the delay between the write and read operations in write_then_read

Note

This function is thread safe

Note

This should rarely be used, as the delay is usually set in the constructor. If you need to change the delay, consider using the set_config function instead.

Note

This delay is only used if the write_then_read function is not set to a custom function and the write and read functions are separate functions.

Parameters:: delay – The delay between the write and read operations in write_then_read

inline void set_config(const Config &config)

Set the configuration for the peripheral

Note

This function is thread safe

Note

The configuration should normally be set in the constructor, but this function can be used to change the configuration after the peripheral has been created - for instance if the peripheral could be found on different communications buses.

Parameters:: config – The configuration for the peripheral

inline void set_config(Config &&config)

Set the configuration for the peripheral

Note

This function is thread safe

Note

The configuration should normally be set in the constructor, but this function can be used to change the configuration after the peripheral has been created - for instance if the peripheral could be found on different communications buses.

Parameters:: config – The configuration for the peripheral

inline const std::string &get_name() const

Get the name of the component

Note

This is the tag of the logger

Returns:: A const reference to the name of the component

inline void set_log_tag(const std::string_view &tag)

Set the tag for the logger

Parameters:: tag – The tag to use for the logger

inline espp::Logger::Verbosity get_log_level() const

Get the log level for the logger

See also

Logger::Verbosity

See also

Logger::set_verbosity

Returns:: The verbosity level of the logger

inline void set_log_level(espp::Logger::Verbosity level)

Set the log level for the logger

See also

Logger::Verbosity

See also

Logger::set_verbosity

Parameters:: level – The verbosity level to use for the logger

inline void set_log_verbosity(espp::Logger::Verbosity level)

Set the log verbosity for the logger

See also

set_log_level

See also

Logger::Verbosity

See also

Logger::set_verbosity

Note

This is a convenience method that calls set_log_level

Parameters:: level – The verbosity level to use for the logger

inline espp::Logger::Verbosity get_log_verbosity() const

Get the log verbosity for the logger

See also

get_log_level

See also

Logger::Verbosity

See also

Logger::get_verbosity

Note

This is a convenience method that calls get_log_level

Returns:: The verbosity level of the logger

inline void set_log_rate_limit(std::chrono::duration<float> rate_limit)

Set the rate limit for the logger

See also

Logger::set_rate_limit

Note

Only calls to the logger that have _rate_limit suffix will be rate limited

Parameters:: rate_limit – The rate limit to use for the logger

Public Static Functions

static inline uint8_t bcd2byte(uint8_t value)

Convert a BCD value to a byte.

Parameters:: value – The BCD value.
Returns:: The byte value.

static inline uint8_t byte2bcd(uint8_t value)

Convert a byte value to BCD.

Parameters:: value – The byte value.
Returns:: The BCD value.

Public Static Attributes

static constexpr uint8_t DEFAULT_ADDRESS = (0x51): The default I2C address for the BM8563.

struct Config

The configuration structure.

Public Members

BasePeripheral::write_fn write: The I2C write function.

BasePeripheral::write_then_read_fn write_then_read: The I2C write then read function.

espp::Logger::Verbosity log_level = {espp::Logger::Verbosity::WARN}: Log verbosity for the input driver.

struct Date

The date structure.

Public Functions

inline bool operator==(const Date &other) const

Equality operator.

Parameters:: other – The other date.
Returns:: True if equal, false otherwise.

inline bool operator!=(const Date &other) const

Inequality operator.

Parameters:: other – The other date.
Returns:: True if not equal, false otherwise.

Public Members

uint16_t year: The year.

uint8_t month: The month.

uint8_t weekday: The day of the week.

uint8_t day: The day of the month.

struct DateTime

The date and time structure.

Public Functions

inline bool operator==(const DateTime &other) const

Equality operator.

Parameters:: other – The other date and time.
Returns:: True if equal, false otherwise.

inline bool operator!=(const DateTime &other) const

Inequality operator.

Parameters:: other – The other date and time.
Returns:: True if not equal, false otherwise.

Public Members

Date date: The date.

Time time: The time.

struct Time

The time structure.

Public Functions

inline bool operator==(const Time &other) const

Equality operator.

Parameters:: other – The other time.
Returns:: True if equal, false otherwise.

inline bool operator!=(const Time &other) const

Inequality operator.

Parameters:: other – The other time.
Returns:: True if not equal, false otherwise.

Public Members

uint8_t hour: The hour.

uint8_t minute: The minute.

uint8_t second: The second.