Trait bme280_multibus::Bme280Bus

pub trait Bme280Bus {
    type Error;

    fn read_regs(&mut self, reg: u8, buf: &mut [u8]) -> Result<(), Self::Error>;
    fn write_reg(&mut self, reg: u8, data: u8) -> Result<(), Self::Error>;

    fn calibration(&mut self) -> Result<Calibration, Self::Error> { ... }
}

BME280 bus, I2C or SPI.

Required Associated Types

type Error

BME280 bus error.

Required Methods

fn read_regs(&mut self, reg: u8, buf: &mut [u8]) -> Result<(), Self::Error>

Read from the BME280.

I2C

Read example (BME280 Datasheet Figure 10: I2C multiple byte read)
+-------+---------------+----+------+------------------+------+
| Start | Slave Address | RW | ACKS | Register Address | ACKS |
+-------+---------------+----+------+------------------+------+
| S     | 111011x       |  0 |      | xxxxxxxx         |      |
+-------+---------------+----+------+------------------+------+

    +-------+---------------+----+------+---------------+------+---------------+--------+------+
... | Start | Slave Address | RW | ACKS | Register Data | ACKM | Register Data | NOACKM | Stop |
    +-------+---------------+----+------+---------------+------+---------------+--------+------+
... | S     | 111011x       |  1 |      | xxxxxxxx      |      | xxxxxxxx      |        | P    |
    +-------+---------------+----+------+---------------+------+---------------+--------+------+

SPI

Read example (BME280 Datasheet Figure 13: SPI multiple byte read)
+-------+----+------------------+---------------+
| Start | RW | Register Address | Register Data |
+-------+----+------------------+---------------+
| CSB=0 |  1 | xxxxxxx          | xxxxxxxx      |
+-------+----+------------------+---------------+

    +---------------+-------+
... | Register Data | Stop  |
    +---------------+-------+
... | xxxxxxxx      | CSB=0 |
    +---------------+-------+

fn write_reg(&mut self, reg: u8, data: u8) -> Result<(), Self::Error>

Write a single register to the BME280.

I2C

Write example (BME280 Datasheet Figure 9: I2C multiple byte write)
+-------+---------------+----+------+------------------+------+---------------+------+
| Start | Slave Address | RW | ACKS | Register Address | ACKS | Register Data | ACKS |
+-------+---------------+----+------+------------------+------+---------------+------+
| S     | 111011x       |  0 |      | xxxxxxxx         |      | xxxxxxxx      |      |
+-------+---------------+----+------+------------------+------+---------------+------+

    +------------------+------+---------------+------+------+
... | Register Address | ACKS | Register Data | ACKS | Stop |
    +------------------+------+---------------+------+------+
... | xxxxxxxx         |      | xxxxxxxx      |      | P    |
    +------------------+------+---------------+------+------+

SPI

Write example (BME280 Datasheet Figure 12: SPI multiple byte write)
+-------+----+------------------+---------------+
| Start | RW | Register Address | Register Data |
+-------+----+------------------+---------------+
| CSB=0 |  0 | xxxxxxx          | xxxxxxxx      |
+-------+----+------------------+---------------+

    +----+------------------+---------------+-------+
... | RW | Register Address | Register Data | Stop  |
    +----+------------------+---------------+-------+
... |  0 | xxxxxxx          | xxxxxxxx      | CSB=0 |
    +----+------------------+---------------+-------+

Provided Methods

fn calibration(&mut self) -> Result<Calibration, Self::Error>

Read the calibration from the chip.

Implementors

impl<I2C, E> Bme280Bus for bme280_multibus::i2c::Bme280Bus<I2C> where
    I2C: Write<Error = E> + WriteRead<Error = E>, 

type Error = E

impl<SPI, CS, E> Bme280Bus for bme280_multibus::spi::infallible_gpio::Bme280Bus<SPI, CS> where
    SPI: Transfer<u8, Error = E> + Write<u8, Error = E>,
    CS: OutputPin<Error = Infallible>, 

type Error = E

impl<SPI, CS, SpiError, PinError> Bme280Bus for bme280_multibus::spi::Bme280Bus<SPI, CS> where
    SPI: Transfer<u8, Error = SpiError> + Write<u8, Error = SpiError>,
    CS: OutputPin<Error = PinError>, 

type Error = Error<SpiError, PinError>