1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
|
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()
}
}
|
