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Rename write to respond_to_read

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This commit is contained in:
Henrik Alsér 2022-11-22 22:10:04 +01:00
parent 633ffe46ae
commit cf900a8a3f
2 changed files with 35 additions and 28 deletions
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52
embassy-nrf/src/twis.rs
View file

@ -507,7 +507,7 @@ impl<'d, T: Instance> Twis<'d, T> {
})
}
fn setup_write_from_ram(&mut self, buffer: &[u8], inten: bool) -> Result<(), Error> {
fn setup_respond_from_ram(&mut self, buffer: &[u8], inten: bool) -> Result<(), Error> {
let r = T::regs();
compiler_fence(SeqCst);
@ -532,14 +532,14 @@ impl<'d, T: Instance> Twis<'d, T> {
Ok(())
}
fn setup_write(&mut self, wr_buffer: &[u8], inten: bool) -> Result<(), Error> {
match self.setup_write_from_ram(wr_buffer, inten) {
fn setup_respond(&mut self, wr_buffer: &[u8], inten: bool) -> Result<(), Error> {
match self.setup_respond_from_ram(wr_buffer, inten) {
Ok(_) => Ok(()),
Err(Error::DMABufferNotInDataMemory) => {
trace!("Copying TWIS tx buffer into RAM for DMA");
let tx_ram_buf = &mut [0; FORCE_COPY_BUFFER_SIZE][..wr_buffer.len()];
tx_ram_buf.copy_from_slice(wr_buffer);
self.setup_write_from_ram(&tx_ram_buf, inten)
self.setup_respond_from_ram(&tx_ram_buf, inten)
}
Err(error) => Err(error),
}
@ -609,18 +609,19 @@ impl<'d, T: Instance> Twis<'d, T> {
Ok(Command::Read)
}
/// Write to an I2C master.
/// Respond to an I2C master READ command.
/// Returns the number of bytes written.
/// The buffer must have a length of at most 255 bytes on the nRF52832
/// and at most 65535 bytes on the nRF52840.
pub fn blocking_write(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_write(buffer, false)?;
pub fn blocking_respond_to_read(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_respond(buffer, false)?;
self.blocking_wait()
}
/// Same as [`blocking_write`](Twis::blocking_write) but will fail instead of copying data into RAM. Consult the module level documentation to learn more.
pub fn blocking_write_from_ram(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_write_from_ram(buffer, false)?;
/// Same as [`blocking_respond_to_read`](Twis::blocking_respond_to_read) but will fail instead of copying data into RAM.
/// Consult the module level documentation to learn more.
pub fn blocking_respond_to_read_from_ram(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_respond_from_ram(buffer, false)?;
self.blocking_wait()
}
@ -643,19 +644,24 @@ impl<'d, T: Instance> Twis<'d, T> {
Ok(Command::Read)
}
/// Write to an I2C master with timeout.
/// Respond to an I2C master READ command with timeout.
/// Returns the number of bytes written.
/// See [`blocking_write`].
/// See [`blocking_respond_to_read`].
#[cfg(feature = "time")]
pub fn blocking_write_timeout(&mut self, buffer: &[u8], timeout: Duration) -> Result<usize, Error> {
self.setup_write(buffer, false)?;
pub fn blocking_respond_to_read_timeout(&mut self, buffer: &[u8], timeout: Duration) -> Result<usize, Error> {
self.setup_respond(buffer, false)?;
self.blocking_wait_timeout(timeout)
}
/// Same as [`blocking_write`](Twis::blocking_write) but will fail instead of copying data into RAM. Consult the module level documentation to learn more.
/// Same as [`blocking_respond_to_read_timeout`](Twis::blocking_respond_to_read_timeout) but will fail instead of copying data into RAM.
/// Consult the module level documentation to learn more.
#[cfg(feature = "time")]
pub fn blocking_write_from_ram_timeout(&mut self, buffer: &[u8], timeout: Duration) -> Result<usize, Error> {
self.setup_write_from_ram(buffer, false)?;
pub fn blocking_respond_to_read_from_ram_timeout(
&mut self,
buffer: &[u8],
timeout: Duration,
) -> Result<usize, Error> {
self.setup_respond_from_ram(buffer, false)?;
self.blocking_wait_timeout(timeout)
}
@ -677,18 +683,18 @@ impl<'d, T: Instance> Twis<'d, T> {
Ok(Command::Read)
}
/// Async write to an I2C master.
/// Respond to an I2C master READ command, asynchronously.
/// Returns the number of bytes written.
/// The buffer must have a length of at most 255 bytes on the nRF52832
/// and at most 65535 bytes on the nRF52840.
pub async fn write(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_write(buffer, true)?;
pub async fn respond_to_read(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_respond(buffer, true)?;
self.async_wait().await
}
/// Same as [`write`](Twis::write) but will fail instead of copying data into RAM. Consult the module level documentation to learn more.
pub async fn write_from_ram(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_write_from_ram(buffer, true)?;
/// Same as [`respond_to_read`](Twis::respond_to_read) but will fail instead of copying data into RAM. Consult the module level documentation to learn more.
pub async fn respond_to_read_from_ram(&mut self, buffer: &[u8]) -> Result<usize, Error> {
self.setup_respond_from_ram(buffer, true)?;
self.async_wait().await
}
}

11
examples/nrf/src/bin/twis.rs
View file

@ -22,20 +22,21 @@ async fn main(_spawner: Spawner) {
info!("Listening...");
loop {
let response = [1, 2, 3, 4, 5, 6, 7, 8];
// This buffer is used if the i2c master performs a Write or WriteRead
let mut buf = [0u8; 16];
let tx_buf = [1, 2, 3, 4, 5, 6, 7, 8];
match i2c.listen(&mut buf).await {
Ok(Command::Read) => {
info!("Got READ command. Writing back data:\n{:?}\n", tx_buf);
if let Err(e) = i2c.write(&tx_buf).await {
info!("Got READ command. Respond with data:\n{:?}\n", response);
if let Err(e) = i2c.respond_to_read(&response).await {
error!("{:?}", e);
}
}
Ok(Command::Write(n)) => info!("Got WRITE command with data:\n{:?}\n", buf[..n]),
Ok(Command::WriteRead(n)) => {
info!("Got WRITE/READ command with data:\n{:?}", buf[..n]);
info!("Writing back data:\n{:?}\n", tx_buf);
if let Err(e) = i2c.write(&tx_buf).await {
info!("Respond with data:\n{:?}\n", response);
if let Err(e) = i2c.respond_to_read(&response).await {
error!("{:?}", e);
}
}