Struct mcp23017_rpi_lib::MCP23017

pub struct MCP23017 { /* private fields */ }

MCP23017 i2c Interface

Implementations

impl MCP23017

pub fn new(address: u16, bus: u8) -> Result<MCP23017, Error>

pub fn pull_up(&self, pin: &Pin, value: State) -> Result<u16, Error>

Used to set the pullUp resistor setting for a pin. Returns the whole register value.

pub fn pin_mode(&mut self, pin: &Pin, mode: Mode) -> Result<u16, Error>

Set pin to either input or output mode. Returns the value of the combined IODIRA and IODIRB registers.

pub fn output(&self, pin: &Pin, value: State) -> Result<u8, Error>

Set an output pin to a specific value.

pub fn input(&self, pin: &Pin) -> Result<State, Error>

Read the value of a pin.

pub fn current_val(&self, pin: &Pin) -> Result<State, Error>

Read the value of a pin regardless of it’s mode

pub fn config_system_interrupt(
    &mut self,
    mirror: Feature,
    intpol: State
) -> Result<(), Error>

Configure system interrupt settings. Mirror - are the int pins mirrored? Intpol - polarity of the int pin.

pub fn config_pin_interrupt(
    &self,
    pin: &Pin,
    enabled: Feature,
    compare_mode: Compare,
    defval: Option<State>
) -> Result<(), Error>

Configure interrupt setting for a specific pin. set on or off.

pub fn read_interrupt(&self, port: Bank) -> Result<Option<(Pin, State)>, Error>

The function determines the pin that caused the interrupt and gets its value. The interrupt is cleared. Returns pin and the value.

pub fn clear_interrupts(&self) -> Result<(), Error>

Check to see if there is an interrupt pending 3 times in a row (indicating it’s stuck) and if needed clear the interrupt without reading values.

pub fn reset(&self) -> Result<(), Error>

Reset all pins and interrupts