Struct mcp23017::MCP23017

pub struct MCP23017<I2C: WriteRead> {
    pub address: u8,
    // some fields omitted
}

Struct for MCP23017. It provides 16-bit, general purpose parallel I/O expansion for I2C bus. It consists of multiple 8-bit configuration registers for input, output and polarity selection. The system master can enable the I/Os as either inputs or outputs by writing the I/O configuration bits (IODIRA/B). The data for each input or output is kept in the corresponding input or output register. The polarity of the Input Port register can be inverted with the Polarity Inversion register

Fields

address: u8

lol

Methods

impl<I2C, E> MCP23017<I2C> where
    I2C: WriteRead<Error = E> + Write<Error = E>, 

pub fn default(i2c: I2C) -> Result<MCP23017<I2C>, Error<E>> where
    I2C: WriteRead<Error = E>, 

Creates an expander with default configuration

pub fn new(i2c: I2C, address: u8) -> Result<MCP23017<I2C>, Error<E>> where
    I2C: WriteRead<Error = E>, 

Creates an expander with specific configuration

pub fn pin_mode(&mut self, pin: u8, pin_mode: PinMode) -> Result<(), E>

Sets the single pin mode to either Mode::INPUT or Mode::OUTPUT

pub fn all_pin_mode(&mut self, pin_mode: PinMode) -> Result<(), E>

Sets pin mode to either Mode::INPUT or Mode::OUTPUT

pub fn read_gpioab(&mut self) -> Result<u16, E>

Reads all 16 pins (port A and B) into a single 16 bits variable

pub fn read_gpio(&mut self, port: Port) -> Result<u8, E>

Reads a single port, A or B, and return its current 8 bit value

pub fn write_gpioab(&mut self, value: u16) -> Result<(), E>

Writes all the pins with the value at the same time

pub fn write_gpioa(&mut self, value: u8) -> Result<(), E>

Writes all the pins with the value at the same time for GPIOA

pub fn write_gpiob(&mut self, value: u8) -> Result<(), E>

Writes all the pins with the value at the same time for GPIOB

pub fn digital_write(&mut self, pin: u8, value: u8) -> Result<(), E>

Writes digital value

pub fn digital_read(&mut self, pin: u8) -> Result<u8, E>

Reads digital pin

pub fn pull_up(&mut self, pin: u8, value: u8) -> Result<(), E>

The GPPU register controls the pull-up resistors for the port pins. If a bit is set and the corresponding pin is configured as an input, the corresponding port pin is internally pulled up with a 100 kohm resistor

pub fn setup_interrupts(
    &mut self,
    mirroring: u8,
    open_drain: u8,
    polarity: Polarity
) -> Result<(), E>

Configures the interrupt system. both port A and B are assigned the same configuration. mirroring will OR both INTA and INTB pins. open_drain will set the INT pin to value or open drain. polarity will set LOW or HIGH on interrupt. Default values after Power On Reset are: (false, false, LOW)

pub fn setup_interrupt_pin(
    &mut self,
    pin: u8,
    int_mode: InterruptMode
) -> Result<(), E>

Sets up a pin for interrupt Note that the interrupt condition finishes when you read the information about the port / value that caused the interrupt or you read the port itself

pub fn get_last_interrupt_pin(&mut self) -> Result<u8, Error<E>>

Get last interrupt pin

pub fn get_last_interrupt_value(&mut self) -> Result<u8, Error<E>>

Gets last interrupt value

Trait Implementations

impl<I2C: Debug + WriteRead> Debug for MCP23017<I2C>

fn fmt(&self, f: &mut Formatter) -> Result

Formats the value using the given formatter.