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Add smoltcp Phy impls

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This commit is contained in:
Harry Ho 2020-06-24 14:17:07 +08:00
parent 5deab5db9b
commit dd062723a3
6 changed files with 184 additions and 38 deletions
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12
Cargo.lock generated
View File

@ -108,9 +108,9 @@ dependencies = [
[[package]]
name = "embedded-hal"
version = "0.2.3"
version = "0.2.4"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ee4908a155094da7723c2d60d617b820061e3b4efcc3d9e293d206a5a76c170b"
checksum = "fa998ce59ec9765d15216393af37a58961ddcefb14c753b4816ba2191d865fcb"
dependencies = [
"nb",
"void",
@ -281,9 +281,9 @@ dependencies = [
[[package]]
name = "syn"
version = "1.0.31"
version = "1.0.33"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b5304cfdf27365b7585c25d4af91b35016ed21ef88f17ced89c7093b43dba8b6"
checksum = "e8d5d96e8cbb005d6959f119f773bfaebb5684296108fb32600c00cde305b2cd"
dependencies = [
"proc-macro2",
"quote",
@ -298,9 +298,9 @@ checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
[[package]]
name = "unicode-xid"
version = "0.2.0"
version = "0.2.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "826e7639553986605ec5979c7dd957c7895e93eabed50ab2ffa7f6128a75097c"
checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
[[package]]
name = "vcell"

10
Cargo.toml
View File

@ -13,10 +13,14 @@ volatile-register = "0.2"
aligned = "0.3"
stm32f4xx-hal = { version = "0.8" , optional = true }
smoltcp = { version = "0.6.0", default-features = false, features = ["proto-ipv4", "proto-ipv6", "socket-icmp", "socket-udp", "socket-tcp", "log", "verbose", "ethernet"], optional = true }
log = { version = "0.4" }
log = "0.4"
[features]
smoltcp-phy = ["smoltcp"]
smoltcp-phy-all = [
"smoltcp/socket-raw", "smoltcp/socket-udp", "smoltcp/socket-tcp",
"smoltcp/proto-ipv4", "smoltcp/proto-ipv6"
]
stm32f407 = ["stm32f4xx-hal/stm32f407"]
default = []
@ -30,6 +34,10 @@ panic-itm = "0.4"
name = "tx_stm32f407"
required-features = ["stm32f407"]
[[example]]
name = "tcp_stm32f407"
required-features = ["stm32f407", "smoltcp-phy-all", "smoltcp/log"]
[profile.release]
codegen-units = 1
incremental = false

51
src/lib.rs
View File

@ -1,7 +1,5 @@
#![no_std]
use core::fmt;
/// STM32F4xx-HAL specific implementations
pub mod spi;
use stm32f4xx_hal::{
@ -17,14 +15,12 @@ pub mod tx;
#[cfg(feature="smoltcp")]
pub mod smoltcp_phy;
pub trait EthController {
pub trait EthController<'c> {
fn init_dev(&mut self) -> Result<(), EthControllerError>;
fn init_rxbuf(&mut self) -> Result<(), EthControllerError>;
// TODO:
fn init_txbuf(&mut self) -> Result<(), EthControllerError>;
fn receive_next(&mut self) -> Result<rx::RxPacket, EthControllerError>;
// TODO: send_packet() is not using TxBuffer, but it should later on
fn send_raw_packet(&mut self, packet: tx::TxPacket) -> Result<(), EthControllerError>;
fn receive_next(&mut self, is_poll: bool) -> Result<rx::RxPacket, EthControllerError>;
fn send_raw_packet(&mut self, packet: &tx::TxPacket) -> Result<(), EthControllerError>;
fn set_promiscuous(&mut self) -> Result<(), EthControllerError>;
fn read_from_mac(&mut self, mac: &mut [u8]) -> Result<(), EthControllerError>;
}
@ -32,11 +28,13 @@ pub trait EthController {
/// TODO: Improve these error types
pub enum EthControllerError {
SpiPortError,
GeneralError
GeneralError,
// TODO: Better name?
NoRxPacketError
}
impl From<spi::SpiPortError> for EthControllerError {
fn from(e: spi::SpiPortError) -> EthControllerError {
fn from(_: spi::SpiPortError) -> EthControllerError {
EthControllerError::SpiPortError
}
}
@ -51,18 +49,17 @@ pub struct SpiEth<SPI: Transfer<u8>,
impl <SPI: Transfer<u8>,
NSS: OutputPin> SpiEth<SPI, NSS> {
pub fn new(spi: SPI, mut nss: NSS) -> Self {
pub fn new(spi: SPI, nss: NSS) -> Self {
SpiEth {
spi_port: spi::SpiPort::new(spi, nss),
rx_buf: rx::RxBuffer::new(),
// TODO: tx_buf
tx_buf: tx::TxBuffer::new()
}
}
}
impl <SPI: Transfer<u8>,
NSS: OutputPin> EthController for SpiEth<SPI, NSS> {
impl <'c, SPI: Transfer<u8>,
NSS: OutputPin> EthController<'c> for SpiEth<SPI, NSS> {
fn init_dev(&mut self) -> Result<(), EthControllerError> {
// Write 0x1234 to EUDAST
self.spi_port.write_reg_16b(spi::EUDAST, 0x1234)?;
@ -96,23 +93,27 @@ impl <SPI: Transfer<u8>,
self.spi_port.write_reg_16b(spi::MAMXFL, rx::RAW_FRAME_LENGTH_MAX as u16)?;
// Enable RXEN (ECON1<0>)
let econ1 = self.spi_port.read_reg_16b(spi::ECON1)?;
self.spi_port.write_reg_16b(spi::ECON1, 0x1 | (econ1 & 0xfffe));
self.spi_port.write_reg_16b(spi::ECON1, 0x1 | (econ1 & 0xfffe))?;
Ok(())
}
/// TODO:
fn init_txbuf(&mut self) -> Result<(), EthControllerError> {
// Set EGPWRPT pointer
self.spi_port.write_reg_16b(spi::EGPWRPT, 0x0000)?;
Ok(())
}
/// Receive the next packet
fn receive_next(&mut self) -> Result<rx::RxPacket, EthControllerError> {
/// Receive the next packet and copy it to rx_packet_buf
/// Set is_poll to true for returning until PKTIF is set;
/// Set is_poll to false for returning Err when PKTIF is not set
fn receive_next(&mut self, is_poll: bool) -> Result<rx::RxPacket, EthControllerError> {
// Poll PKTIF (EIR<4>) to check if it is set
loop {
let eir = self.spi_port.read_reg_16b(spi::EIR)?;
if eir & 0x40 == 0x40 { break }
if !is_poll {
return Err(EthControllerError::NoRxPacketError)
}
}
// Set ERXRDPT pointer to next_addr
self.spi_port.write_reg_16b(spi::ERXRDPT, self.rx_buf.get_next_addr())?;
@ -132,7 +133,7 @@ impl <SPI: Transfer<u8>,
// Read frame bytes
let mut frame_buf = [0; rx::RAW_FRAME_LENGTH_MAX];
self.spi_port.read_rxdat(&mut frame_buf, rx_packet.get_frame_length() as u32)?;
rx_packet.write_to_frame(&frame_buf[1..]);
rx_packet.copy_frame_from(&frame_buf[1..]);
// Set ERXTAIL pointer to (next_addr - 2)
if self.rx_buf.get_next_addr() > rx::ERXST_DEFAULT {
self.spi_port.write_reg_16b(spi::ERXTAIL, self.rx_buf.get_next_addr() - 2)?;
@ -147,14 +148,13 @@ impl <SPI: Transfer<u8>,
}
/// Send an established packet
/// TODO: Should be eliminated when TxBuffer is used instead later on
fn send_raw_packet(&mut self, packet: tx::TxPacket) -> Result<(), EthControllerError> {
fn send_raw_packet(&mut self, packet: &tx::TxPacket) -> Result<(), EthControllerError> {
// Set EGPWRPT pointer to next_addr
self.spi_port.write_reg_16b(spi::EGPWRPT, self.tx_buf.get_next_addr())?;
// Copy packet data to SRAM Buffer
// 1-byte Opcode is included
let mut txdat_buf: [u8; tx::RAW_FRAME_LENGTH_MAX + 1] = [0; tx::RAW_FRAME_LENGTH_MAX + 1];
packet.copy_from_frame(&mut txdat_buf[1..]);
packet.write_frame_to(&mut txdat_buf[1..]);
self.spi_port.write_txdat(&mut txdat_buf, packet.get_frame_length() as u32)?;
// Set ETXST to packet start address
self.spi_port.write_reg_16b(spi::ETXST, self.tx_buf.get_next_addr())?;
@ -168,7 +168,8 @@ impl <SPI: Transfer<u8>,
econ1_lo = self.spi_port.read_reg_8b(spi::ECON1)?;
if econ1_lo & 0x02 == 0x02 { break }
}
// TODO: Read ETXSTAT
// TODO: Read ETXSTAT to understand Ethernet transmission status
// (See: Register 9-2, ENC424J600 Data Sheet)
// Update TX buffer start address
self.tx_buf.set_next_addr((self.tx_buf.get_next_addr() + packet.get_frame_length() as u16) %
tx::GPBUFEN_DEFAULT);
@ -177,11 +178,11 @@ impl <SPI: Transfer<u8>,
/// Set controller to Promiscuous Mode
fn set_promiscuous(&mut self) -> Result<(), EthControllerError> {
// From ENC424J600 Data Sheet Section 10.12:
// From Section 10.12, ENC424J600 Data Sheet:
// "To accept all incoming frames regardless of content (Promiscuous mode),
// set the CRCEN, RUNTEN, UCEN, NOTMEEN and MCEN bits."
let mut erxfcon_lo = self.spi_port.read_reg_8b(spi::ERXFCON)?;
self.spi_port.write_reg_8b(spi::ERXFCON, 0b0101_1110 | (erxfcon_lo & 0b1010_0001));
let erxfcon_lo = self.spi_port.read_reg_8b(spi::ERXFCON)?;
self.spi_port.write_reg_8b(spi::ERXFCON, 0b0101_1110 | (erxfcon_lo & 0b1010_0001))?;
Ok(())
}

13
src/rx.rs
View File

@ -8,7 +8,7 @@ pub const RAW_FRAME_LENGTH_MAX: usize = 0x1000;
/// Receive Status Vector Length
pub const RSV_LENGTH: usize = 6;
/// Struct for RX Buffer
/// Struct for RX Buffer on the hardware
/// TODO: Should be a singleton
pub struct RxBuffer {
wrap_addr: u16,
@ -80,11 +80,20 @@ impl RxPacket {
self.frame_length
}
pub fn write_to_frame(&mut self, raw_frame: &[u8]) {
pub fn copy_frame_from(&mut self, raw_frame: &[u8]) {
for i in 0..self.frame_length {
self.frame[i] = raw_frame[i];
}
}
pub fn write_frame_to(&self, frame: &mut [u8]) {
for i in 0..self.frame_length {
frame[i] = self.frame[i];
}
}
pub fn get_mut_frame(&mut self) -> &mut [u8] {
&mut self.frame
}
/// TODO: Mostly for debugging only?
pub fn get_frame_byte(&self, i: usize) -> u8 {

116
src/smoltcp_phy.rs Normal file
View File

@ -0,0 +1,116 @@
use crate::{
EthController, rx, tx
};
use core::intrinsics::transmute;
use smoltcp::{
phy::{Device, DeviceCapabilities, RxToken, TxToken},
time::Instant,
Error
};
pub struct SmoltcpDevice<'c> {
eth_controller: &'c mut dyn EthController<'c>,
rx_packet_buf: [u8; rx::RAW_FRAME_LENGTH_MAX],
tx_packet_buf: [u8; tx::RAW_FRAME_LENGTH_MAX]
}
impl<'c> SmoltcpDevice<'c> {
pub fn new(eth_controller: &'c mut dyn EthController<'c>) -> Self {
SmoltcpDevice {
eth_controller,
rx_packet_buf: [0; rx::RAW_FRAME_LENGTH_MAX],
tx_packet_buf: [0; tx::RAW_FRAME_LENGTH_MAX]
}
}
}
impl<'a, 'c> Device<'a> for SmoltcpDevice<'c> {
type RxToken = EthRxToken<'a>;
type TxToken = EthTxToken<'a>;
fn capabilities(&self) -> DeviceCapabilities {
DeviceCapabilities::default()
}
fn receive(&'a mut self) -> Option<(Self::RxToken, Self::TxToken)> {
// Extend self lifetime from 'c to 'a for tokens' access to EthController
let self_trans = unsafe {
transmute::<&mut SmoltcpDevice<'c>, &mut SmoltcpDevice<'a>>(&mut *self)
};
// Make self_a point to *self that has a lifetime of 'a (extended)
let self_a = self_trans as *mut SmoltcpDevice<'a>;
match self_trans.eth_controller.receive_next(false) {
Ok(rx_packet) => {
// Write received packet to RX packet buffer
rx_packet.write_frame_to(&mut self.rx_packet_buf);
// Construct a RxToken
let rx_token = EthRxToken {
buf: &mut self.rx_packet_buf,
len: rx_packet.get_frame_length()
};
// Construct a blank TxToken
let tx_token = EthTxToken {
buf: &mut self.tx_packet_buf,
dev: self_a
};
Some((rx_token, tx_token))
},
Err(_) => None
}
}
fn transmit(&'a mut self) -> Option<Self::TxToken> {
// Extend self lifetime from 'c to 'a for TxToken's access to EthController
let self_trans = unsafe {
transmute::<&mut SmoltcpDevice<'c>, &mut SmoltcpDevice<'a>>(&mut *self)
};
// Make self_a point to *self that has a lifetime of 'a (extended)
let self_a = self_trans as *mut SmoltcpDevice<'a>;
// Construct a blank TxToken
let tx_token = EthTxToken {
buf: &mut self.tx_packet_buf,
dev: self_a
};
Some(tx_token)
}
}
pub struct EthRxToken<'a> {
buf: &'a mut [u8],
len: usize
}
impl<'a> RxToken for EthRxToken<'a> {
fn consume<R, F>(self, _timestamp: Instant, f: F) -> Result<R, Error>
where
F: FnOnce(&mut [u8]) -> Result<R, Error>,
{
f(&mut self.buf[..self.len])
}
}
pub struct EthTxToken<'a> {
buf: &'a mut [u8],
dev: *mut SmoltcpDevice<'a>
}
impl<'a> TxToken for EthTxToken<'a> {
fn consume<R, F>(self, _timestamp: Instant, len: usize, f: F) -> Result<R, Error>
where
F: FnOnce(&mut [u8]) -> Result<R, Error>,
{
let result = f(&mut self.buf[..len]);
// Construct a TxPacket
let mut tx_packet = tx::TxPacket::new();
// Update frame length and write frame bytes
tx_packet.update_frame(&mut self.buf[..len], len);
// Send the packet as raw
let eth_controller = unsafe {
&mut (*self.dev).eth_controller
};
match eth_controller.send_raw_packet(&tx_packet) {
Ok(_) => { result },
Err(_) => Err(Error::Exhausted)
}
}
}

20
src/tx.rs
View File

@ -5,7 +5,7 @@ pub const GPBUFEN_DEFAULT: u16 = 0x5340; // End of General-Purpose SRAM Buffe
/// Max raw frame array size
pub const RAW_FRAME_LENGTH_MAX: usize = 0x1000;
/// Struct for TX Buffer
/// Struct for TX Buffer on the hardware
/// TODO: Should be a singleton
pub struct TxBuffer {
wrap_addr: u16,
@ -36,8 +36,13 @@ impl TxBuffer {
pub fn get_next_addr(& self) -> u16{
self.next_addr
}
// TODO: Need more functions for smoltcp::phy compatibility (maybe?)
pub fn set_tail_addr(&mut self, addr: u16) {
self.tail_addr = addr;
}
pub fn get_tail_addr(& self) -> u16{
self.tail_addr
}
}
/// Struct for TX Packet
@ -62,7 +67,7 @@ impl TxPacket {
self.frame[i] = raw_frame[i];
}
}
pub fn copy_from_frame(&self, frame: &mut [u8]) {
pub fn write_frame_to(&self, frame: &mut [u8]) {
for i in 0..self.frame_length {
frame[i] = self.frame[i];
}
@ -72,6 +77,13 @@ impl TxPacket {
self.frame_length
}
pub fn get_frame(&self) -> &[u8] {
&self.frame
}
pub fn get_mut_frame(&mut self) -> &mut [u8] {
&mut self.frame
}
/// TODO: Mostly for debugging only?
pub fn get_frame_byte(&self, i: usize) -> u8 {
self.frame[i]