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Fix missing max packet size handling

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Jiajie Chen
2025-12-24 23:17:29 +08:00
parent 3ff5df5c2e
commit fdbb9574aa
1 changed files with 11 additions and 3 deletions
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14
src/cdc.rs
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@@ -75,9 +75,17 @@ impl UsbInterfaceHandler for UsbCdcAcmHandler {
return Ok(vec![]);
} else {
// bulk in
// TODO: handle max packet size
let resp = self.tx_buffer.clone();
self.tx_buffer.clear();
// Handle max packet size - return data in chunks of max_packet_size
let max_packet_size = ep.max_packet_size as usize;
let resp = if self.tx_buffer.len() > max_packet_size {
// Return only the first chunk (max_packet_size bytes)
self.tx_buffer.drain(..max_packet_size).collect::<Vec<_>>()
} else {
// Return all data if it fits in one packet
let resp = self.tx_buffer.clone();
self.tx_buffer.clear();
resp
};
return Ok(resp);
}
}