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net-enc28j60: reset rx logic when buffer corrupts.

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This commit is contained in:
Dario Nieuwenhuis 2023-08-18 15:45:23 +02:00
parent 3ebb93e47d
commit 73942f50cb
1 changed files with 33 additions and 21 deletions
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54
embassy-net-enc28j60/src/lib.rs
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@ -106,19 +106,7 @@ where
// disable CLKOUT output
self.write_control_register(bank3::Register::ECOCON, 0);
// RX start
// "It is recommended that the ERXST Pointer be programmed with an even address"
self.write_control_register(bank0::Register::ERXSTL, RXST.low());
self.write_control_register(bank0::Register::ERXSTH, RXST.high());
// RX read pointer
// NOTE Errata #14 so we are using an *odd* address here instead of ERXST
self.write_control_register(bank0::Register::ERXRDPTL, RXND.low());
self.write_control_register(bank0::Register::ERXRDPTH, RXND.high());
// RX end
self.write_control_register(bank0::Register::ERXNDL, RXND.low());
self.write_control_register(bank0::Register::ERXNDH, RXND.high());
self.init_rx();
// TX start
// "It is recommended that an even address be used for ETXST"
@ -172,12 +160,37 @@ where
// Set the per packet control byte; we'll always use the value 0
self.write_buffer_memory(Some(TXST), &mut [0]);
// Enable reception
self.bit_field_set(common::Register::ECON1, common::ECON1::mask().rxen());
}
fn init_rx(&mut self) {
// RX start
// "It is recommended that the ERXST Pointer be programmed with an even address"
self.write_control_register(bank0::Register::ERXSTL, RXST.low());
self.write_control_register(bank0::Register::ERXSTH, RXST.high());
// RX read pointer
// NOTE Errata #14 so we are using an *odd* address here instead of ERXST
self.write_control_register(bank0::Register::ERXRDPTL, RXND.low());
self.write_control_register(bank0::Register::ERXRDPTH, RXND.high());
// RX end
self.write_control_register(bank0::Register::ERXNDL, RXND.low());
self.write_control_register(bank0::Register::ERXNDH, RXND.high());
// decrease the packet count to 0
while self.read_control_register(bank1::Register::EPKTCNT) != 0 {
self.bit_field_set(common::Register::ECON2, common::ECON2::mask().pktdec());
}
// Enable reception
self.next_packet = RXST;
}
fn reset_rx(&mut self) {
self.bit_field_set(common::Register::ECON1, common::ECON1::mask().rxrst());
self.bit_field_clear(common::Register::ECON1, common::ECON1::mask().rxrst());
self.init_rx();
self.bit_field_set(common::Register::ECON1, common::ECON1::mask().rxen());
}
@ -198,18 +211,17 @@ where
// next packet pointer
let next_packet = u16::from_parts(temp_buf[0], temp_buf[1]);
if next_packet > RXND {
panic!("CorruptRxBuffer");
}
// status vector
let status = header::RxStatus(u32::from_le_bytes(temp_buf[2..].try_into().unwrap()));
let len = status.byte_count() as u16 - CRC_SZ;
let len_with_crc = status.byte_count() as u16;
if len > RXND {
panic!("CorruptRxBuffer 2");
if len_with_crc < CRC_SZ || len_with_crc > 1600 || next_packet > RXND {
warn!("RX buffer corrupted, resetting RX logic to recover...");
self.reset_rx();
return None;
}
let len = len_with_crc - CRC_SZ;
self.read_buffer_memory(None, &mut buf[..len as usize]);
// update ERXRDPT