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|
//! Blocking shared I2C bus
//!
//! # Example (nrf52)
//!
//! ```rust
//! use embassy_embedded_hal::shared_bus::blocking::i2c::I2cBusDevice;
//! use embassy::blocking_mutex::{NoopMutex, raw::NoopRawMutex};
//!
//! static I2C_BUS: Forever<NoopMutex<RefCell<Twim<TWISPI0>>>> = Forever::new();
//! let irq = interrupt::take!(SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0);
//! let i2c = Twim::new(p.TWISPI0, irq, p.P0_03, p.P0_04, Config::default());
//! let i2c_bus = NoopMutex::new(RefCell::new(i2c));
//! let i2c_bus = I2C_BUS.put(i2c_bus);
//!
//! let i2c_dev1 = I2cBusDevice::new(i2c_bus);
//! let mpu = Mpu6050::new(i2c_dev1);
//! ```
use core::cell::RefCell;
use embassy::blocking_mutex::raw::RawMutex;
use embassy::blocking_mutex::Mutex;
use embedded_hal_1::i2c::blocking::{I2c, Operation};
use embedded_hal_1::i2c::ErrorType;
use crate::shared_bus::i2c::I2cBusDeviceError;
pub struct I2cBusDevice<'a, M: RawMutex, BUS> {
bus: &'a Mutex<M, RefCell<BUS>>,
}
impl<'a, M: RawMutex, BUS> I2cBusDevice<'a, M, BUS> {
pub fn new(bus: &'a Mutex<M, RefCell<BUS>>) -> Self {
Self { bus }
}
}
impl<'a, M: RawMutex, BUS> ErrorType for I2cBusDevice<'a, M, BUS>
where
BUS: ErrorType,
{
type Error = I2cBusDeviceError<BUS::Error>;
}
impl<M, BUS> I2c for I2cBusDevice<'_, M, BUS>
where
M: RawMutex,
BUS: I2c,
{
fn read(&mut self, address: u8, buffer: &mut [u8]) -> Result<(), Self::Error> {
self.bus
.lock(|bus| bus.borrow_mut().read(address, buffer).map_err(I2cBusDeviceError::I2c))
}
fn write(&mut self, address: u8, bytes: &[u8]) -> Result<(), Self::Error> {
self.bus
.lock(|bus| bus.borrow_mut().write(address, bytes).map_err(I2cBusDeviceError::I2c))
}
fn write_read(&mut self, address: u8, wr_buffer: &[u8], rd_buffer: &mut [u8]) -> Result<(), Self::Error> {
self.bus.lock(|bus| {
bus.borrow_mut()
.write_read(address, wr_buffer, rd_buffer)
.map_err(I2cBusDeviceError::I2c)
})
}
fn transaction<'a>(&mut self, address: u8, operations: &mut [Operation<'a>]) -> Result<(), Self::Error> {
let _ = address;
let _ = operations;
todo!()
}
fn write_iter<B: IntoIterator<Item = u8>>(&mut self, addr: u8, bytes: B) -> Result<(), Self::Error> {
let _ = addr;
let _ = bytes;
todo!()
}
fn write_iter_read<B: IntoIterator<Item = u8>>(
&mut self,
addr: u8,
bytes: B,
buffer: &mut [u8],
) -> Result<(), Self::Error> {
let _ = addr;
let _ = bytes;
let _ = buffer;
todo!()
}
fn transaction_iter<'a, O: IntoIterator<Item = Operation<'a>>>(
&mut self,
address: u8,
operations: O,
) -> Result<(), Self::Error> {
let _ = address;
let _ = operations;
todo!()
}
}
impl<'a, M, BUS, E> embedded_hal_02::blocking::i2c::Write for I2cBusDevice<'_, M, BUS>
where
M: RawMutex,
BUS: embedded_hal_02::blocking::i2c::Write<Error = E>,
{
type Error = I2cBusDeviceError<E>;
fn write<'w>(&mut self, addr: u8, bytes: &'w [u8]) -> Result<(), Self::Error> {
self.bus
.lock(|bus| bus.borrow_mut().write(addr, bytes).map_err(I2cBusDeviceError::I2c))
}
}
impl<'a, M, BUS, E> embedded_hal_02::blocking::i2c::Read for I2cBusDevice<'_, M, BUS>
where
M: RawMutex,
BUS: embedded_hal_02::blocking::i2c::Read<Error = E>,
{
type Error = I2cBusDeviceError<E>;
fn read<'w>(&mut self, addr: u8, bytes: &'w mut [u8]) -> Result<(), Self::Error> {
self.bus
.lock(|bus| bus.borrow_mut().read(addr, bytes).map_err(I2cBusDeviceError::I2c))
}
}
impl<'a, M, BUS, E> embedded_hal_02::blocking::i2c::WriteRead for I2cBusDevice<'_, M, BUS>
where
M: RawMutex,
BUS: embedded_hal_02::blocking::i2c::WriteRead<Error = E>,
{
type Error = I2cBusDeviceError<E>;
fn write_read<'w>(&mut self, addr: u8, bytes: &'w [u8], buffer: &'w mut [u8]) -> Result<(), Self::Error> {
self.bus.lock(|bus| {
bus.borrow_mut()
.write_read(addr, bytes, buffer)
.map_err(I2cBusDeviceError::I2c)
})
}
}
|
