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net-w5500: inline socket into device.

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This commit is contained in:
Dario Nieuwenhuis 2023-08-15 17:20:41 +02:00
parent c367b84ee5
commit a436bd068f
3 changed files with 99 additions and 104 deletions
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124
embassy-net-w5500/src/device.rs
View File

@ -1,12 +1,34 @@
use embedded_hal_async::spi::SpiDevice;
use crate::socket;
use crate::spi::{Address, SpiInterface};
pub const MODE: Address = (RegisterBlock::Common, 0x00);
pub const MAC: Address = (RegisterBlock::Common, 0x09);
pub const SOCKET_INTR: Address = (RegisterBlock::Common, 0x18);
pub const PHY_CFG: Address = (RegisterBlock::Common, 0x2E);
pub const COMMON_MODE: Address = (RegisterBlock::Common, 0x00);
pub const COMMON_MAC: Address = (RegisterBlock::Common, 0x09);
pub const COMMON_SOCKET_INTR: Address = (RegisterBlock::Common, 0x18);
pub const COMMON_PHY_CFG: Address = (RegisterBlock::Common, 0x2E);
pub const SOCKET_MODE: Address = (RegisterBlock::Socket0, 0x00);
pub const SOCKET_COMMAND: Address = (RegisterBlock::Socket0, 0x01);
pub const SOCKET_RXBUF_SIZE: Address = (RegisterBlock::Socket0, 0x1E);
pub const SOCKET_TXBUF_SIZE: Address = (RegisterBlock::Socket0, 0x1F);
pub const SOCKET_TX_FREE_SIZE: Address = (RegisterBlock::Socket0, 0x20);
pub const SOCKET_TX_DATA_WRITE_PTR: Address = (RegisterBlock::Socket0, 0x24);
pub const SOCKET_RECVD_SIZE: Address = (RegisterBlock::Socket0, 0x26);
pub const SOCKET_RX_DATA_READ_PTR: Address = (RegisterBlock::Socket0, 0x28);
pub const SOCKET_INTR_MASK: Address = (RegisterBlock::Socket0, 0x2C);
pub const SOCKET_INTR: Address = (RegisterBlock::Socket0, 0x02);
#[repr(u8)]
pub enum Command {
Open = 0x01,
Send = 0x20,
Receive = 0x40,
}
#[repr(u8)]
pub enum Interrupt {
Receive = 0b00100_u8,
}
#[repr(u8)]
pub enum RegisterBlock {
@ -28,27 +50,78 @@ impl<SPI: SpiDevice> W5500<SPI> {
pub async fn new(spi: SPI, mac_addr: [u8; 6]) -> Result<W5500<SPI>, SPI::Error> {
let mut bus = SpiInterface(spi);
// Reset device
bus.write_frame(MODE, &[0x80]).await?;
bus.write_frame(COMMON_MODE, &[0x80]).await?;
// Enable interrupt pin
bus.write_frame(SOCKET_INTR, &[0x01]).await?;
bus.write_frame(COMMON_SOCKET_INTR, &[0x01]).await?;
// Enable receive interrupt
bus.write_frame(socket::SOCKET_INTR_MASK, &[socket::Interrupt::Receive as u8])
.await?;
bus.write_frame(SOCKET_INTR_MASK, &[Interrupt::Receive as u8]).await?;
// Set MAC address
bus.write_frame(MAC, &mac_addr).await?;
bus.write_frame(COMMON_MAC, &mac_addr).await?;
// Set the raw socket RX/TX buffer sizes to 16KB
bus.write_frame(socket::TXBUF_SIZE, &[16]).await?;
bus.write_frame(socket::RXBUF_SIZE, &[16]).await?;
bus.write_frame(SOCKET_TXBUF_SIZE, &[16]).await?;
bus.write_frame(SOCKET_RXBUF_SIZE, &[16]).await?;
// MACRAW mode with MAC filtering.
let mode: u8 = (1 << 2) | (1 << 7);
bus.write_frame(socket::MODE, &[mode]).await?;
socket::command(&mut bus, socket::Command::Open).await?;
bus.write_frame(SOCKET_MODE, &[mode]).await?;
let mut this = Self { bus };
this.command(Command::Open).await?;
Ok(Self { bus })
Ok(this)
}
async fn reset_interrupt(&mut self, code: Interrupt) -> Result<(), SPI::Error> {
let data = [code as u8];
self.bus.write_frame(SOCKET_INTR, &data).await
}
async fn get_tx_write_ptr(&mut self) -> Result<u16, SPI::Error> {
let mut data = [0u8; 2];
self.bus.read_frame(SOCKET_TX_DATA_WRITE_PTR, &mut data).await?;
Ok(u16::from_be_bytes(data))
}
async fn set_tx_write_ptr(&mut self, ptr: u16) -> Result<(), SPI::Error> {
let data = ptr.to_be_bytes();
self.bus.write_frame(SOCKET_TX_DATA_WRITE_PTR, &data).await
}
async fn get_rx_read_ptr(&mut self) -> Result<u16, SPI::Error> {
let mut data = [0u8; 2];
self.bus.read_frame(SOCKET_RX_DATA_READ_PTR, &mut data).await?;
Ok(u16::from_be_bytes(data))
}
async fn set_rx_read_ptr(&mut self, ptr: u16) -> Result<(), SPI::Error> {
let data = ptr.to_be_bytes();
self.bus.write_frame(SOCKET_RX_DATA_READ_PTR, &data).await
}
async fn command(&mut self, command: Command) -> Result<(), SPI::Error> {
let data = [command as u8];
self.bus.write_frame(SOCKET_COMMAND, &data).await
}
async fn get_rx_size(&mut self) -> Result<u16, SPI::Error> {
loop {
// Wait until two sequential reads are equal
let mut res0 = [0u8; 2];
self.bus.read_frame(SOCKET_RECVD_SIZE, &mut res0).await?;
let mut res1 = [0u8; 2];
self.bus.read_frame(SOCKET_RECVD_SIZE, &mut res1).await?;
if res0 == res1 {
break Ok(u16::from_be_bytes(res0));
}
}
}
async fn get_tx_free_size(&mut self) -> Result<u16, SPI::Error> {
let mut data = [0; 2];
self.bus.read_frame(SOCKET_TX_FREE_SIZE, &mut data).await?;
Ok(u16::from_be_bytes(data))
}
/// Read bytes from the RX buffer. Returns the number of bytes read.
@ -61,14 +134,14 @@ impl<SPI: SpiDevice> W5500<SPI> {
/// Read an ethernet frame from the device. Returns the number of bytes read.
pub async fn read_frame(&mut self, frame: &mut [u8]) -> Result<usize, SPI::Error> {
let rx_size = socket::get_rx_size(&mut self.bus).await? as usize;
let rx_size = self.get_rx_size().await? as usize;
if rx_size == 0 {
return Ok(0);
}
socket::reset_interrupt(&mut self.bus, socket::Interrupt::Receive).await?;
self.reset_interrupt(Interrupt::Receive).await?;
let mut read_ptr = socket::get_rx_read_ptr(&mut self.bus).await?;
let mut read_ptr = self.get_rx_read_ptr().await?;
// First two bytes gives the size of the received ethernet frame
let expected_frame_size: usize = {
@ -82,25 +155,26 @@ impl<SPI: SpiDevice> W5500<SPI> {
.await?;
// Register RX as completed
socket::set_rx_read_ptr(&mut self.bus, read_ptr).await?;
socket::command(&mut self.bus, socket::Command::Receive).await?;
self.set_rx_read_ptr(read_ptr).await?;
self.command(Command::Receive).await?;
Ok(expected_frame_size)
}
/// Write an ethernet frame to the device. Returns number of bytes written
pub async fn write_frame(&mut self, frame: &[u8]) -> Result<usize, SPI::Error> {
while socket::get_tx_free_size(&mut self.bus).await? < frame.len() as u16 {}
let write_ptr = socket::get_tx_write_ptr(&mut self.bus).await?;
while self.get_tx_free_size().await? < frame.len() as u16 {}
let write_ptr = self.get_tx_write_ptr().await?;
self.bus.write_frame((RegisterBlock::TxBuf, write_ptr), frame).await?;
socket::set_tx_write_ptr(&mut self.bus, write_ptr.wrapping_add(frame.len() as u16)).await?;
socket::command(&mut self.bus, socket::Command::Send).await?;
self.set_tx_write_ptr(write_ptr.wrapping_add(frame.len() as u16))
.await?;
self.command(Command::Send).await?;
Ok(frame.len())
}
pub async fn is_link_up(&mut self) -> bool {
let mut link = [0];
self.bus.read_frame(PHY_CFG, &mut link).await.ok();
self.bus.read_frame(COMMON_PHY_CFG, &mut link).await.ok();
link[0] & 1 == 1
}
}

1
embassy-net-w5500/src/lib.rs
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@ -2,7 +2,6 @@
#![no_std]
mod device;
mod socket;
mod spi;
use embassy_futures::select::{select, Either};

78
embassy-net-w5500/src/socket.rs
View File

@ -1,78 +0,0 @@
use embedded_hal_async::spi::SpiDevice;
use crate::device::RegisterBlock;
use crate::spi::{Address, SpiInterface};
pub const MODE: Address = (RegisterBlock::Socket0, 0x00);
pub const COMMAND: Address = (RegisterBlock::Socket0, 0x01);
pub const RXBUF_SIZE: Address = (RegisterBlock::Socket0, 0x1E);
pub const TXBUF_SIZE: Address = (RegisterBlock::Socket0, 0x1F);
pub const TX_FREE_SIZE: Address = (RegisterBlock::Socket0, 0x20);
pub const TX_DATA_WRITE_PTR: Address = (RegisterBlock::Socket0, 0x24);
pub const RECVD_SIZE: Address = (RegisterBlock::Socket0, 0x26);
pub const RX_DATA_READ_PTR: Address = (RegisterBlock::Socket0, 0x28);
pub const SOCKET_INTR_MASK: Address = (RegisterBlock::Socket0, 0x2C);
pub const INTR: Address = (RegisterBlock::Socket0, 0x02);
#[repr(u8)]
pub enum Command {
Open = 0x01,
Send = 0x20,
Receive = 0x40,
}
#[repr(u8)]
pub enum Interrupt {
Receive = 0b00100_u8,
}
pub async fn reset_interrupt<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>, code: Interrupt) -> Result<(), SPI::Error> {
let data = [code as u8];
bus.write_frame(INTR, &data).await
}
pub async fn get_tx_write_ptr<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>) -> Result<u16, SPI::Error> {
let mut data = [0u8; 2];
bus.read_frame(TX_DATA_WRITE_PTR, &mut data).await?;
Ok(u16::from_be_bytes(data))
}
pub async fn set_tx_write_ptr<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>, ptr: u16) -> Result<(), SPI::Error> {
let data = ptr.to_be_bytes();
bus.write_frame(TX_DATA_WRITE_PTR, &data).await
}
pub async fn get_rx_read_ptr<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>) -> Result<u16, SPI::Error> {
let mut data = [0u8; 2];
bus.read_frame(RX_DATA_READ_PTR, &mut data).await?;
Ok(u16::from_be_bytes(data))
}
pub async fn set_rx_read_ptr<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>, ptr: u16) -> Result<(), SPI::Error> {
let data = ptr.to_be_bytes();
bus.write_frame(RX_DATA_READ_PTR, &data).await
}
pub async fn command<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>, command: Command) -> Result<(), SPI::Error> {
let data = [command as u8];
bus.write_frame(COMMAND, &data).await
}
pub async fn get_rx_size<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>) -> Result<u16, SPI::Error> {
loop {
// Wait until two sequential reads are equal
let mut res0 = [0u8; 2];
bus.read_frame(RECVD_SIZE, &mut res0).await?;
let mut res1 = [0u8; 2];
bus.read_frame(RECVD_SIZE, &mut res1).await?;
if res0 == res1 {
break Ok(u16::from_be_bytes(res0));
}
}
}
pub async fn get_tx_free_size<SPI: SpiDevice>(bus: &mut SpiInterface<SPI>) -> Result<u16, SPI::Error> {
let mut data = [0; 2];
bus.read_frame(TX_FREE_SIZE, &mut data).await?;
Ok(u16::from_be_bytes(data))
}