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-rw-r--r--embassy-embedded-hal/src/adapter.rs248
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diff --git a/embassy-embedded-hal/src/adapter.rs b/embassy-embedded-hal/src/adapter.rs
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+use core::future::Future;
+use embedded_hal_02::blocking;
+use embedded_hal_02::serial;
+
+/// BlockingAsync is a wrapper that implements async traits using blocking peripherals. This allows
+/// driver writers to depend on the async traits while still supporting embedded-hal peripheral implementations.
+///
+/// BlockingAsync will implement any async trait that maps to embedded-hal traits implemented for the wrapped driver.
+///
+/// Driver users are then free to choose which implementation that is available to them.
+pub struct BlockingAsync<T> {
+ wrapped: T,
+}
+
+impl<T> BlockingAsync<T> {
+ /// Create a new instance of a wrapper for a given peripheral.
+ pub fn new(wrapped: T) -> Self {
+ Self { wrapped }
+ }
+}
+
+//
+// I2C implementations
+//
+impl<T, E> embedded_hal_1::i2c::ErrorType for BlockingAsync<T>
+where
+ E: embedded_hal_1::i2c::Error + 'static,
+ T: blocking::i2c::WriteRead<Error = E>
+ + blocking::i2c::Read<Error = E>
+ + blocking::i2c::Write<Error = E>,
+{
+ type Error = E;
+}
+
+impl<T, E> embedded_hal_async::i2c::I2c for BlockingAsync<T>
+where
+ E: embedded_hal_1::i2c::Error + 'static,
+ T: blocking::i2c::WriteRead<Error = E>
+ + blocking::i2c::Read<Error = E>
+ + blocking::i2c::Write<Error = E>,
+{
+ type WriteFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+ type ReadFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+ type WriteReadFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+
+ fn read<'a>(&'a mut self, address: u8, buffer: &'a mut [u8]) -> Self::ReadFuture<'a> {
+ async move { self.wrapped.read(address, buffer) }
+ }
+
+ fn write<'a>(&'a mut self, address: u8, bytes: &'a [u8]) -> Self::WriteFuture<'a> {
+ async move { self.wrapped.write(address, bytes) }
+ }
+
+ fn write_read<'a>(
+ &'a mut self,
+ address: u8,
+ bytes: &'a [u8],
+ buffer: &'a mut [u8],
+ ) -> Self::WriteReadFuture<'a> {
+ async move { self.wrapped.write_read(address, bytes, buffer) }
+ }
+
+ type TransactionFuture<'a, 'b> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a, 'b: 'a;
+
+ fn transaction<'a, 'b>(
+ &'a mut self,
+ address: u8,
+ operations: &'a mut [embedded_hal_async::i2c::Operation<'b>],
+ ) -> Self::TransactionFuture<'a, 'b> {
+ let _ = address;
+ let _ = operations;
+ async move { todo!() }
+ }
+}
+
+//
+// SPI implementatinos
+//
+
+impl<T, E> embedded_hal_async::spi::ErrorType for BlockingAsync<T>
+where
+ E: embedded_hal_1::spi::Error,
+ T: blocking::spi::Transfer<u8, Error = E> + blocking::spi::Write<u8, Error = E>,
+{
+ type Error = E;
+}
+
+impl<T, E> embedded_hal_async::spi::SpiBus<u8> for BlockingAsync<T>
+where
+ E: embedded_hal_1::spi::Error + 'static,
+ T: blocking::spi::Transfer<u8, Error = E> + blocking::spi::Write<u8, Error = E>,
+{
+ type TransferFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+
+ fn transfer<'a>(&'a mut self, read: &'a mut [u8], write: &'a [u8]) -> Self::TransferFuture<'a> {
+ async move {
+ // Ensure we write the expected bytes
+ for i in 0..core::cmp::min(read.len(), write.len()) {
+ read[i] = write[i].clone();
+ }
+ self.wrapped.transfer(read)?;
+ Ok(())
+ }
+ }
+
+ type TransferInPlaceFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+
+ fn transfer_in_place<'a>(&'a mut self, _: &'a mut [u8]) -> Self::TransferInPlaceFuture<'a> {
+ async move { todo!() }
+ }
+}
+
+impl<T, E> embedded_hal_async::spi::SpiBusFlush for BlockingAsync<T>
+where
+ E: embedded_hal_1::spi::Error + 'static,
+ T: blocking::spi::Transfer<u8, Error = E> + blocking::spi::Write<u8, Error = E>,
+{
+ type FlushFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+
+ fn flush<'a>(&'a mut self) -> Self::FlushFuture<'a> {
+ async move { Ok(()) }
+ }
+}
+
+impl<T, E> embedded_hal_async::spi::SpiBusWrite<u8> for BlockingAsync<T>
+where
+ E: embedded_hal_1::spi::Error + 'static,
+ T: blocking::spi::Transfer<u8, Error = E> + blocking::spi::Write<u8, Error = E>,
+{
+ type WriteFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+
+ fn write<'a>(&'a mut self, data: &'a [u8]) -> Self::WriteFuture<'a> {
+ async move {
+ self.wrapped.write(data)?;
+ Ok(())
+ }
+ }
+}
+
+impl<T, E> embedded_hal_async::spi::SpiBusRead<u8> for BlockingAsync<T>
+where
+ E: embedded_hal_1::spi::Error + 'static,
+ T: blocking::spi::Transfer<u8, Error = E> + blocking::spi::Write<u8, Error = E>,
+{
+ type ReadFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+
+ fn read<'a>(&'a mut self, data: &'a mut [u8]) -> Self::ReadFuture<'a> {
+ async move {
+ self.wrapped.transfer(data)?;
+ Ok(())
+ }
+ }
+}
+
+// Uart implementatinos
+impl<T, E> embedded_hal_1::serial::ErrorType for BlockingAsync<T>
+where
+ T: serial::Read<u8, Error = E>,
+ E: embedded_hal_1::serial::Error + 'static,
+{
+ type Error = E;
+}
+
+#[cfg(feature = "_todo_embedded_hal_serial")]
+impl<T, E> embedded_hal_async::serial::Read for BlockingAsync<T>
+where
+ T: serial::Read<u8, Error = E>,
+ E: embedded_hal_1::serial::Error + 'static,
+{
+ type ReadFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where T: 'a;
+ fn read<'a>(&'a mut self, buf: &'a mut [u8]) -> Self::ReadFuture<'a> {
+ async move {
+ let mut pos = 0;
+ while pos < buf.len() {
+ match self.wrapped.read() {
+ Err(nb::Error::WouldBlock) => {}
+ Err(nb::Error::Other(e)) => return Err(e),
+ Ok(b) => {
+ buf[pos] = b;
+ pos += 1;
+ }
+ }
+ }
+ Ok(())
+ }
+ }
+}
+
+#[cfg(feature = "_todo_embedded_hal_serial")]
+impl<T, E> embedded_hal_async::serial::Write for BlockingAsync<T>
+where
+ T: blocking::serial::Write<u8, Error = E> + serial::Read<u8, Error = E>,
+ E: embedded_hal_1::serial::Error + 'static,
+{
+ type WriteFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where T: 'a;
+ fn write<'a>(&'a mut self, buf: &'a [u8]) -> Self::WriteFuture<'a> {
+ async move { self.wrapped.bwrite_all(buf) }
+ }
+
+ type FlushFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where T: 'a;
+ fn flush<'a>(&'a mut self) -> Self::FlushFuture<'a> {
+ async move { self.wrapped.bflush() }
+ }
+}
+
+/// NOR flash wrapper
+use embedded_storage::nor_flash::{ErrorType, NorFlash, ReadNorFlash};
+use embedded_storage_async::nor_flash::{AsyncNorFlash, AsyncReadNorFlash};
+
+impl<T> ErrorType for BlockingAsync<T>
+where
+ T: ErrorType,
+{
+ type Error = T::Error;
+}
+
+impl<T> AsyncNorFlash for BlockingAsync<T>
+where
+ T: NorFlash,
+{
+ const WRITE_SIZE: usize = <T as NorFlash>::WRITE_SIZE;
+ const ERASE_SIZE: usize = <T as NorFlash>::ERASE_SIZE;
+
+ type WriteFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+ fn write<'a>(&'a mut self, offset: u32, data: &'a [u8]) -> Self::WriteFuture<'a> {
+ async move { self.wrapped.write(offset, data) }
+ }
+
+ type EraseFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+ fn erase<'a>(&'a mut self, from: u32, to: u32) -> Self::EraseFuture<'a> {
+ async move { self.wrapped.erase(from, to) }
+ }
+}
+
+impl<T> AsyncReadNorFlash for BlockingAsync<T>
+where
+ T: ReadNorFlash,
+{
+ const READ_SIZE: usize = <T as ReadNorFlash>::READ_SIZE;
+ type ReadFuture<'a> = impl Future<Output = Result<(), Self::Error>> + 'a where Self: 'a;
+ fn read<'a>(&'a mut self, address: u32, data: &'a mut [u8]) -> Self::ReadFuture<'a> {
+ async move { self.wrapped.read(address, data) }
+ }
+
+ fn capacity(&self) -> usize {
+ self.wrapped.capacity()
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-14 19:13:39 +0000