Improve mod & struct visibility & hierarchy #10
20
src/lib.rs
20
src/lib.rs
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@ -106,9 +106,9 @@ impl <SPI: Transfer<u8>,
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pub fn init_rxbuf(&mut self) -> Result<(), Error> {
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pub fn init_rxbuf(&mut self) -> Result<(), Error> {
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// Set ERXST pointer
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// Set ERXST pointer
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self.spi_port.write_reg_16b(spi::addrs::ERXST, self.rx_buf.get_start_addr())?;
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self.spi_port.write_reg_16b(spi::addrs::ERXST, self.rx_buf.start_addr)?;
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// Set ERXTAIL pointer
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// Set ERXTAIL pointer
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self.spi_port.write_reg_16b(spi::addrs::ERXTAIL, self.rx_buf.get_tail_addr())?;
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self.spi_port.write_reg_16b(spi::addrs::ERXTAIL, self.rx_buf.tail_addr)?;
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// Set MAMXFL to maximum number of bytes in each accepted packet
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// Set MAMXFL to maximum number of bytes in each accepted packet
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self.spi_port.write_reg_16b(spi::addrs::MAMXFL, RAW_FRAME_LENGTH_MAX as u16)?;
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self.spi_port.write_reg_16b(spi::addrs::MAMXFL, RAW_FRAME_LENGTH_MAX as u16)?;
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// Enable RX - set RXEN (ECON1<0>) to 1
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// Enable RX - set RXEN (ECON1<0>) to 1
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@ -169,11 +169,11 @@ impl <SPI: Transfer<u8>,
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}
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}
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}
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}
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// Set ERXRDPT pointer to next_addr
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// Set ERXRDPT pointer to next_addr
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self.spi_port.write_reg_16b(spi::addrs::ERXRDPT, self.rx_buf.get_next_addr())?;
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self.spi_port.write_reg_16b(spi::addrs::ERXRDPT, self.rx_buf.next_addr)?;
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// Read 2 bytes to update next_addr
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// Read 2 bytes to update next_addr
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let mut next_addr_buf = [0; 3];
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let mut next_addr_buf = [0; 3];
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self.spi_port.read_rxdat(&mut next_addr_buf, 2)?;
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self.spi_port.read_rxdat(&mut next_addr_buf, 2)?;
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self.rx_buf.set_next_addr((next_addr_buf[1] as u16) | ((next_addr_buf[2] as u16) << 8));
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self.rx_buf.next_addr = (next_addr_buf[1] as u16) | ((next_addr_buf[2] as u16) << 8);
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// Read 6 bytes to update rsv
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// Read 6 bytes to update rsv
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let mut rsv_buf = [0; 7];
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let mut rsv_buf = [0; 7];
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self.spi_port.read_rxdat(&mut rsv_buf, 6)?;
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self.spi_port.read_rxdat(&mut rsv_buf, 6)?;
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@ -190,8 +190,8 @@ impl <SPI: Transfer<u8>,
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// Set ERXTAIL pointer to (next_addr - 2)
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// Set ERXTAIL pointer to (next_addr - 2)
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// * Assume head, tail, next and wrap addresses are word-aligned (even)
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// * Assume head, tail, next and wrap addresses are word-aligned (even)
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// - If next_addr is at least (start_addr+2), then set tail pointer to the word right before next_addr
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// - If next_addr is at least (start_addr+2), then set tail pointer to the word right before next_addr
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if self.rx_buf.get_next_addr() > self.rx_buf.get_start_addr() {
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if self.rx_buf.next_addr > self.rx_buf.start_addr {
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self.spi_port.write_reg_16b(spi::addrs::ERXTAIL, self.rx_buf.get_next_addr() - 2)?;
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self.spi_port.write_reg_16b(spi::addrs::ERXTAIL, self.rx_buf.next_addr - 2)?;
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// - Otherwise, next_addr will wrap, so set tail pointer to the last word address of RX buffer
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// - Otherwise, next_addr will wrap, so set tail pointer to the last word address of RX buffer
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} else {
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} else {
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self.spi_port.write_reg_16b(spi::addrs::ERXTAIL, rx::RX_MAX_ADDRESS - 1)?;
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self.spi_port.write_reg_16b(spi::addrs::ERXTAIL, rx::RX_MAX_ADDRESS - 1)?;
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@ -205,14 +205,14 @@ impl <SPI: Transfer<u8>,
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/// Send an established packet
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/// Send an established packet
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fn send_packet(&mut self, packet: &tx::TxPacket) -> Result<(), Error> {
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fn send_packet(&mut self, packet: &tx::TxPacket) -> Result<(), Error> {
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// Set EGPWRPT pointer to next_addr
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// Set EGPWRPT pointer to next_addr
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self.spi_port.write_reg_16b(spi::addrs::EGPWRPT, self.tx_buf.get_next_addr())?;
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self.spi_port.write_reg_16b(spi::addrs::EGPWRPT, self.tx_buf.next_addr)?;
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// Copy packet data to SRAM Buffer
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// Copy packet data to SRAM Buffer
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// 1-byte Opcode is included
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// 1-byte Opcode is included
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let mut txdat_buf: [u8; RAW_FRAME_LENGTH_MAX + 1] = [0; RAW_FRAME_LENGTH_MAX + 1];
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let mut txdat_buf: [u8; RAW_FRAME_LENGTH_MAX + 1] = [0; RAW_FRAME_LENGTH_MAX + 1];
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packet.write_frame_to(&mut txdat_buf[1..]);
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packet.write_frame_to(&mut txdat_buf[1..]);
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self.spi_port.write_txdat(&mut txdat_buf, packet.get_frame_length())?;
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self.spi_port.write_txdat(&mut txdat_buf, packet.get_frame_length())?;
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// Set ETXST to packet start address
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// Set ETXST to packet start address
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self.spi_port.write_reg_16b(spi::addrs::ETXST, self.tx_buf.get_next_addr())?;
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self.spi_port.write_reg_16b(spi::addrs::ETXST, self.tx_buf.next_addr)?;
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// Set ETXLEN to packet length
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// Set ETXLEN to packet length
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self.spi_port.write_reg_16b(spi::addrs::ETXLEN, packet.get_frame_length() as u16)?;
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self.spi_port.write_reg_16b(spi::addrs::ETXLEN, packet.get_frame_length() as u16)?;
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// Send packet - set TXRTS (ECON1<1>) to start transmission
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// Send packet - set TXRTS (ECON1<1>) to start transmission
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@ -226,8 +226,8 @@ impl <SPI: Transfer<u8>,
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// (See: Register 9-2, ENC424J600 Data Sheet)
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// (See: Register 9-2, ENC424J600 Data Sheet)
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// Update TX buffer start address
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// Update TX buffer start address
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// * Assume TX buffer consumes the entire general-purpose SRAM block
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// * Assume TX buffer consumes the entire general-purpose SRAM block
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self.tx_buf.set_next_addr((self.tx_buf.get_next_addr() + packet.get_frame_length() as u16) %
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self.tx_buf.next_addr = (self.tx_buf.next_addr + packet.get_frame_length() as u16) %
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self.rx_buf.get_start_addr() - self.tx_buf.get_start_addr());
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self.rx_buf.start_addr - self.tx_buf.start_addr;
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Ok(())
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Ok(())
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}
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}
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}
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}
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27
src/rx.rs
27
src/rx.rs
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@ -11,9 +11,9 @@ pub const RSV_LENGTH: usize = 6;
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/// Struct for RX Buffer on the hardware
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/// Struct for RX Buffer on the hardware
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/// TODO: Should be a singleton
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/// TODO: Should be a singleton
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pub struct RxBuffer {
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pub struct RxBuffer {
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start_addr: u16,
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pub start_addr: u16,
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next_addr: u16,
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pub next_addr: u16,
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tail_addr: u16
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pub tail_addr: u16
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}
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}
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impl RxBuffer {
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impl RxBuffer {
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@ -24,27 +24,6 @@ impl RxBuffer {
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tail_addr: ERXTAIL_DEFAULT
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tail_addr: ERXTAIL_DEFAULT
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}
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}
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}
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}
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pub fn set_start_addr(&mut self, addr: u16) {
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self.start_addr = addr;
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}
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pub fn get_start_addr(& self) -> u16{
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self.start_addr
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}
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pub fn set_next_addr(&mut self, addr: u16) {
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self.next_addr = addr;
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}
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pub fn get_next_addr(& self) -> u16 {
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self.next_addr
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}
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pub fn set_tail_addr(&mut self, addr: u16) {
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self.tail_addr = addr;
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}
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pub fn get_tail_addr(& self) -> u16{
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self.tail_addr
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}
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}
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}
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/// Struct for RX Packet
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/// Struct for RX Packet
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27
src/tx.rs
27
src/tx.rs
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@ -3,10 +3,10 @@ use crate::RAW_FRAME_LENGTH_MAX;
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/// Struct for TX Buffer on the hardware
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/// Struct for TX Buffer on the hardware
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/// TODO: Should be a singleton
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/// TODO: Should be a singleton
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pub struct TxBuffer {
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pub struct TxBuffer {
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start_addr: u16,
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pub start_addr: u16,
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// The following two fields are controlled by firmware
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// The following two fields are controlled by firmware
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next_addr: u16,
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pub next_addr: u16,
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tail_addr: u16
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pub tail_addr: u16
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}
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}
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impl TxBuffer {
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impl TxBuffer {
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@ -17,27 +17,6 @@ impl TxBuffer {
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tail_addr: 0x0000
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tail_addr: 0x0000
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}
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}
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}
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}
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pub fn set_start_addr(&mut self, addr: u16) {
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self.start_addr = addr;
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}
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pub fn get_start_addr(& self) -> u16{
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self.start_addr
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}
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pub fn set_next_addr(&mut self, addr: u16) {
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self.next_addr = addr;
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}
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pub fn get_next_addr(& self) -> u16 {
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self.next_addr
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}
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pub fn set_tail_addr(&mut self, addr: u16) {
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self.tail_addr = addr;
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}
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pub fn get_tail_addr(& self) -> u16{
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self.tail_addr
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}
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}
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}
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/// Struct for TX Packet
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/// Struct for TX Packet
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