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drtioaux: adjust firmware for multiple buffers

This commit is contained in:
mwojcik 2024-04-19 16:27:51 +08:00 committed by Sébastien Bourdeauducq
parent b6ac052e9f
commit b1c305fd11
1 changed files with 7 additions and 11 deletions
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18
artiq/firmware/libboard_artiq/drtioaux.rs
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@ -69,9 +69,9 @@ fn receive<F, T>(linkno: u8, f: F) -> Result<Option<T>, Error<!>>
let linkidx = linkno as usize;
unsafe {
if (DRTIOAUX[linkidx].aux_rx_present_read)() == 1 {
let ptr = DRTIOAUX_MEM[linkidx].base + DRTIOAUX_MEM[linkidx].size / 2;
let len = (DRTIOAUX[linkidx].aux_rx_length_read)();
let result = f(slice::from_raw_parts(ptr as *mut u8, len as usize));
let read_ptr = (DRTIOAUX[linkidx].aux_read_pointer_read)() as usize;
let ptr = DRTIOAUX_MEM[linkidx].base + (DRTIOAUX_MEM[linkidx].size / 2) + (read_ptr * 0x400);
let result = f(slice::from_raw_parts(ptr as *mut u8, 0x400 as usize));
(DRTIOAUX[linkidx].aux_rx_present_write)(1);
Ok(Some(result?))
} else {
@ -86,21 +86,17 @@ pub fn recv(linkno: u8) -> Result<Option<Packet>, Error<!>> {
}
receive(linkno, |buffer| {
if buffer.len() < 8 {
return Err(IoError::UnexpectedEnd.into())
}
let mut reader = Cursor::new(buffer);
let checksum_at = buffer.len() - 4;
let packet = Packet::read_from(&mut reader)?;
let padding = (12 - (reader.position() % 8)) % 8;
let checksum_at = reader.position() + padding;
let checksum = crc::crc32::checksum_ieee(&reader.get_ref()[0..checksum_at]);
reader.set_position(checksum_at);
if reader.read_u32()? != checksum {
return Err(Error::CorruptedPacket)
}
reader.set_position(0);
Ok(Packet::read_from(&mut reader)?)
Ok(packet)
})
}