Fix (#2013)

Author: bjoernQ

esp-hal/src/spi/master.rs

@@ -1289,8 +1289,12 @@ mod dma {
  }
 
  let result = unsafe {
- self.spi
- .start_write_bytes_dma(buffer.first(), bytes_to_write, &mut self.channel.tx)
+ self.spi.start_write_bytes_dma(
+ buffer.first(),
+ bytes_to_write,
+ &mut self.channel.tx,
+ true,
+ )
  };
  if let Err(e) = result {
  return Err((e, self, buffer));
@@ -1317,8 +1321,12 @@ mod dma {
  }
 
  let result = unsafe {
- self.spi
- .start_read_bytes_dma(buffer.first(), bytes_to_read, &mut self.channel.rx)
+ self.spi.start_read_bytes_dma(
+ buffer.first(),
+ bytes_to_read,
+ &mut self.channel.rx,
+ true,
+ )
  };
  if let Err(e) = result {
  return Err((e, self, buffer));
@@ -1451,8 +1459,12 @@ mod dma {
  }
 
  let result = unsafe {
- self.spi
- .start_read_bytes_dma(buffer.first(), bytes_to_read, &mut self.channel.rx)
+ self.spi.start_read_bytes_dma(
+ buffer.first(),
+ bytes_to_read,
+ &mut self.channel.rx,
+ false,
+ )
  };
  if let Err(e) = result {
  return Err((e, self, buffer));
@@ -1529,8 +1541,12 @@ mod dma {
  }
 
  let result = unsafe {
- self.spi
- .start_write_bytes_dma(buffer.first(), bytes_to_write, &mut self.channel.tx)
+ self.spi.start_write_bytes_dma(
+ buffer.first(),
+ bytes_to_write,
+ &mut self.channel.tx,
+ false,
+ )
  };
  if let Err(e) = result {
  return Err((e, self, buffer));
@@ -2262,16 +2278,19 @@ pub trait InstanceDma: Instance {
  first_desc: *mut DmaDescriptor,
  len: usize,
  tx: &mut TX,
+ full_duplex: bool,
  ) -> Result<(), Error> {
  let reg_block = self.register_block();
  self.configure_datalen(len as u32 * 8);
 
  tx.is_done();
 
- // disable MISO and re-enable MOSI
- reg_block
- .user()
- .modify(|_, w| w.usr_miso().bit(false).usr_mosi().bit(true));
+ // disable MISO and re-enable MOSI (DON'T do it for half-duplex)
+ if full_duplex {
+ reg_block
+ .user()
+ .modify(|_, w| w.usr_miso().bit(false).usr_mosi().bit(true));
+ }
 
  self.enable_dma();
  self.update();
@@ -2301,16 +2320,19 @@ pub trait InstanceDma: Instance {
  desc: *mut DmaDescriptor,
  data_length: usize,
  rx: &mut RX,
+ full_duplex: bool,
  ) -> Result<(), Error> {
  let reg_block = self.register_block();
  self.configure_datalen(data_length as u32 * 8);
 
  rx.is_done();
 
- // re-enable MISO and disable MOSI
- reg_block
- .user()
- .modify(|_, w| w.usr_miso().bit(true).usr_mosi().bit(false));
+ // re-enable MISO and disable MOSI (DON'T do it for half-duplex)
+ if full_duplex {
+ reg_block
+ .user()
+ .modify(|_, w| w.usr_miso().bit(true).usr_mosi().bit(false));
+ }
 
  self.enable_dma();
  self.update();