380: Adding data livestream capability r=ryan-summers a=ryan-summers

This PR implements livestream capability for ADC and DAC samples. The current implementation provides a static configuration.

**TODO**
- [x] Clean up documentation
- [x] Implement streaming for `lockin` app
- [x] Test new block-packetization scheme
- [x] Add reference python stream receiver
- [x] Merge #381 first

Co-authored-by: Ryan Summers <ryan.summers@vertigo-designs.com>
This commit is contained in:
bors[bot] 2021-06-22 08:00:59 +00:00 committed by GitHub
commit 8c9842f3cf
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 740 additions and 82 deletions

21
Cargo.lock generated
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@ -38,7 +38,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "b9a69a963b70ddacfcd382524f72a4576f359af9334b3bf48a79566590bb8bfa" checksum = "b9a69a963b70ddacfcd382524f72a4576f359af9334b3bf48a79566590bb8bfa"
dependencies = [ dependencies = [
"bitrate", "bitrate",
"cortex-m 0.7.2", "cortex-m 0.6.7",
"embedded-hal", "embedded-hal",
] ]
@ -389,9 +389,9 @@ dependencies = [
[[package]] [[package]]
name = "managed" name = "managed"
version = "0.7.2" version = "0.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "c75de51135344a4f8ed3cfe2720dc27736f7711989703a0b43aadf3753c55577" checksum = "0ca88d725a0a943b096803bd34e73a4437208b6077654cc4ecb2947a5f91618d"
[[package]] [[package]]
name = "matrixmultiply" name = "matrixmultiply"
@ -455,9 +455,9 @@ checksum = "546c37ac5d9e56f55e73b677106873d9d9f5190605e41a856503623648488cae"
[[package]] [[package]]
name = "ndarray" name = "ndarray"
version = "0.15.2" version = "0.15.1"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "02b2e4807aaa21dc6dcc3417e5902dc199c3648043bf27b7af4b202332fe4760" checksum = "cc1372704f14bb132a49a6701c2238970a359ee0829fed481b522a63bf25456a"
dependencies = [ dependencies = [
"matrixmultiply", "matrixmultiply",
"num-complex", "num-complex",
@ -743,9 +743,8 @@ dependencies = [
[[package]] [[package]]
name = "smoltcp" name = "smoltcp"
version = "0.7.3" version = "0.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "git+https://github.com/smoltcp-rs/smoltcp?branch=master#027f255f904b9b7c4226cfd8b2d31f272ffa5105"
checksum = "11b5647cc4676e9358e6b15b6536b34e5b413e5ae946a06b3f85e713132bcdfa"
dependencies = [ dependencies = [
"bitflags", "bitflags",
"byteorder", "byteorder",
@ -755,7 +754,7 @@ dependencies = [
[[package]] [[package]]
name = "smoltcp-nal" name = "smoltcp-nal"
version = "0.1.0" version = "0.1.0"
source = "git+https://github.com/quartiq/smoltcp-nal.git?rev=5e56576#5e56576fbbc594f0a0e1df9222a20eb35c8e7511" source = "git+https://github.com/quartiq/smoltcp-nal.git?rev=5baf55f#5baf55fafbfe2c08d9fe56c836171e9d2fb468e8"
dependencies = [ dependencies = [
"embedded-nal", "embedded-nal",
"heapless 0.7.1", "heapless 0.7.1",
@ -804,7 +803,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8b672c837e0ee8158ecc7fce0f9a948dd0693a9c588338e728d14b73307a0b7d" checksum = "8b672c837e0ee8158ecc7fce0f9a948dd0693a9c588338e728d14b73307a0b7d"
dependencies = [ dependencies = [
"bare-metal 0.2.5", "bare-metal 0.2.5",
"cortex-m 0.7.2", "cortex-m 0.6.7",
"cortex-m-rt", "cortex-m-rt",
"vcell", "vcell",
] ]
@ -812,7 +811,7 @@ dependencies = [
[[package]] [[package]]
name = "stm32h7xx-hal" name = "stm32h7xx-hal"
version = "0.9.0" version = "0.9.0"
source = "git+https://github.com/quartiq/stm32h7xx-hal.git?rev=acd47be#acd47beb4b84b4dc46da3a8b68688bc8c5984604" source = "git+https://github.com/quartiq/stm32h7xx-hal.git?rev=33aa67d#33aa67d74790cb9f680a4f281b72df0664bcf03c"
dependencies = [ dependencies = [
"bare-metal 1.0.0", "bare-metal 1.0.0",
"cast", "cast",

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@ -60,7 +60,7 @@ rev = "70b0eb5"
features = ["stm32h743v", "rt", "unproven", "ethernet", "quadspi"] features = ["stm32h743v", "rt", "unproven", "ethernet", "quadspi"]
# version = "0.9.0" # version = "0.9.0"
git = "https://github.com/quartiq/stm32h7xx-hal.git" git = "https://github.com/quartiq/stm32h7xx-hal.git"
rev = "acd47be" rev = "33aa67d"
# link.x section start/end # link.x section start/end
[patch.crates-io.cortex-m-rt] [patch.crates-io.cortex-m-rt]
@ -73,7 +73,7 @@ rev = "2750533"
[dependencies.smoltcp-nal] [dependencies.smoltcp-nal]
git = "https://github.com/quartiq/smoltcp-nal.git" git = "https://github.com/quartiq/smoltcp-nal.git"
rev = "5e56576" rev = "5baf55f"
[dependencies.minimq] [dependencies.minimq]
git = "https://github.com/quartiq/minimq.git" git = "https://github.com/quartiq/minimq.git"

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@ -0,0 +1,189 @@
#!/usr/bin/python3
"""
Author: Ryan Summers
Description: Provides a mechanism for measuring Stabilizer stream data throughput.
"""
import socket
import collections
import struct
import time
import logging
# Representation of a single UDP packet transmitted by Stabilizer.
Packet = collections.namedtuple('Packet', ['index', 'adc', 'dac'])
class Timer:
""" A basic timer for measuring elapsed time periods. """
def __init__(self, period=1.0):
""" Create the timer with the provided period. """
self.start_time = time.time()
self.trigger_time = self.start_time + period
self.period = period
self.started = False
def is_triggered(self):
""" Check if the timer period has elapsed. """
now = time.time()
return now >= self.trigger_time
def start(self):
""" Start the timer. """
self.start_time = time.time()
self.started = True
def is_started(self):
""" Check if the timer has started. """
return self.started
def arm(self):
""" Arm the timer trigger. """
self.trigger_time = time.time() + self.period
def elapsed(self):
""" Get the elapsed time since the timer was started. """
now = time.time()
return now - self.start_time
class PacketParser:
""" Utilize class used for parsing received UDP data. """
def __init__(self):
""" Initialize the parser. """
self.buf = b''
self.total_bytes = 0
def ingress(self, data):
""" Ingress received UDP data. """
self.total_bytes += len(data)
self.buf += data
def parse_all_packets(self):
""" Parse all received packets from the receive buffer.
Returns:
A list of received Packets.
"""
packets = []
while True:
new_packets = self._parse()
if new_packets:
packets += new_packets
else:
return packets
def _parse(self):
""" Attempt to parse packets from the received buffer. """
# Attempt to parse a block from the buffer.
if len(self.buf) < 4:
return None
start_id, num_blocks, data_size = struct.unpack_from('!HBB', self.buf)
packet_size = 4 + data_size * num_blocks * 8
if len(self.buf) < packet_size:
return None
self.buf = self.buf[4:]
packets = []
for offset in range(num_blocks):
adcs_dacs = struct.unpack_from(f'!{4 * data_size}H', self.buf)
adc = [
adcs_dacs[0:data_size],
adcs_dacs[data_size:2*data_size],
]
dac = [
adcs_dacs[2*data_size: 3*data_size],
adcs_dacs[3*data_size:],
]
self.buf = self.buf[8*data_size:]
packets.append(Packet(start_id + offset, adc, dac))
return packets
def check_index(previous_index, next_index):
""" Check if two indices are sequential. """
if previous_index == -1:
return True
# Handle index roll-over. Indices are only stored in 16-bit numbers.
if next_index < previous_index:
next_index += 65536
expected_index = previous_index + 1
return next_index == expected_index
def main():
""" Main program. """
connection = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
connection.bind(("", 1111))
logging.basicConfig(level=logging.INFO,
format='%(asctime)s.%(msecs)03d %(levelname)-8s %(message)s')
last_index = -1
drop_count = 0
good_blocks = 0
timer = Timer()
parser = PacketParser()
while True:
# Receive any data over UDP and parse it.
data = connection.recv(4096)
if data and not timer.is_started():
timer.start()
parser.ingress(data)
# Handle any received packets.
for packet in parser.parse_all_packets():
# Handle any dropped packets.
if not check_index(last_index, packet.index):
print(hex(last_index), hex(packet.index))
if packet.index < (last_index + 1):
dropped = packet.index + 65536 - (last_index + 1)
else:
dropped = packet.index - (last_index + 1)
drop_count += dropped
last_index = packet.index
good_blocks += 1
# Report the throughput periodically.
if timer.is_triggered():
drate = parser.total_bytes * 8 / 1e6 / timer.elapsed()
print(f'''
Data Rate: {drate:.3f} Mbps
Received Blocks: {good_blocks}
Dropped blocks: {drop_count}
Metadata: {parser.total_bytes / 1e6:.3f} MB in {timer.elapsed():.2f} s
----
''')
timer.arm()
if __name__ == '__main__':
main()

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@ -18,6 +18,7 @@ use stabilizer::{
DigitalInput0, DigitalInput1, AFE0, AFE1, DigitalInput0, DigitalInput1, AFE0, AFE1,
}, },
net::{ net::{
data_stream::{BlockGenerator, StreamTarget},
miniconf::Miniconf, miniconf::Miniconf,
serde::Deserialize, serde::Deserialize,
telemetry::{Telemetry, TelemetryBuffer}, telemetry::{Telemetry, TelemetryBuffer},
@ -37,6 +38,7 @@ pub struct Settings {
allow_hold: bool, allow_hold: bool,
force_hold: bool, force_hold: bool,
telemetry_period: u16, telemetry_period: u16,
stream_target: StreamTarget,
} }
impl Default for Settings { impl Default for Settings {
@ -56,6 +58,8 @@ impl Default for Settings {
force_hold: false, force_hold: false,
// The default telemetry period in seconds. // The default telemetry period in seconds.
telemetry_period: 10, telemetry_period: 10,
stream_target: StreamTarget::default(),
} }
} }
} }
@ -68,6 +72,7 @@ const APP: () = {
adcs: (Adc0Input, Adc1Input), adcs: (Adc0Input, Adc1Input),
dacs: (Dac0Output, Dac1Output), dacs: (Dac0Output, Dac1Output),
network: NetworkUsers<Settings, Telemetry>, network: NetworkUsers<Settings, Telemetry>,
generator: BlockGenerator,
settings: Settings, settings: Settings,
telemetry: TelemetryBuffer, telemetry: TelemetryBuffer,
@ -76,13 +81,13 @@ const APP: () = {
iir_state: [[iir::Vec5; IIR_CASCADE_LENGTH]; 2], iir_state: [[iir::Vec5; IIR_CASCADE_LENGTH]; 2],
} }
#[init(spawn=[telemetry, settings_update])] #[init(spawn=[telemetry, settings_update, ethernet_link])]
fn init(c: init::Context) -> init::LateResources { fn init(c: init::Context) -> init::LateResources {
// Configure the microcontroller // Configure the microcontroller
let (mut stabilizer, _pounder) = let (mut stabilizer, _pounder) =
hardware::setup::setup(c.core, c.device); hardware::setup::setup(c.core, c.device);
let network = NetworkUsers::new( let mut network = NetworkUsers::new(
stabilizer.net.stack, stabilizer.net.stack,
stabilizer.net.phy, stabilizer.net.phy,
stabilizer.cycle_counter, stabilizer.cycle_counter,
@ -90,10 +95,15 @@ const APP: () = {
stabilizer.net.mac_address, stabilizer.net.mac_address,
); );
let generator = network.enable_streaming();
// Spawn a settings update for default settings. // Spawn a settings update for default settings.
c.spawn.settings_update().unwrap(); c.spawn.settings_update().unwrap();
c.spawn.telemetry().unwrap(); c.spawn.telemetry().unwrap();
// Spawn the ethernet link period check task.
c.spawn.ethernet_link().unwrap();
// Enable ADC/DAC events // Enable ADC/DAC events
stabilizer.adcs.0.start(); stabilizer.adcs.0.start();
stabilizer.adcs.1.start(); stabilizer.adcs.1.start();
@ -107,6 +117,7 @@ const APP: () = {
afes: stabilizer.afes, afes: stabilizer.afes,
adcs: stabilizer.adcs, adcs: stabilizer.adcs,
dacs: stabilizer.dacs, dacs: stabilizer.dacs,
generator,
network, network,
digital_inputs: stabilizer.digital_inputs, digital_inputs: stabilizer.digital_inputs,
telemetry: TelemetryBuffer::default(), telemetry: TelemetryBuffer::default(),
@ -130,7 +141,7 @@ const APP: () = {
/// ///
/// Because the ADC and DAC operate at the same rate, these two constraints actually implement /// Because the ADC and DAC operate at the same rate, these two constraints actually implement
/// the same time bounds, meeting one also means the other is also met. /// the same time bounds, meeting one also means the other is also met.
#[task(binds=DMA1_STR4, resources=[adcs, digital_inputs, dacs, iir_state, settings, telemetry], priority=2)] #[task(binds=DMA1_STR4, resources=[adcs, digital_inputs, dacs, iir_state, settings, telemetry, generator], priority=2)]
#[inline(never)] #[inline(never)]
#[link_section = ".itcm.process"] #[link_section = ".itcm.process"]
fn process(mut c: process::Context) { fn process(mut c: process::Context) {
@ -141,6 +152,7 @@ const APP: () = {
ref settings, ref settings,
ref mut iir_state, ref mut iir_state,
ref mut telemetry, ref mut telemetry,
ref mut generator,
} = c.resources; } = c.resources;
let digital_inputs = [ let digital_inputs = [
@ -180,6 +192,9 @@ const APP: () = {
.last(); .last();
} }
// Stream the data.
generator.send(&adc_samples, &dac_samples);
// Update telemetry measurements. // Update telemetry measurements.
telemetry.adcs = telemetry.adcs =
[AdcCode(adc_samples[0][0]), AdcCode(adc_samples[1][0])]; [AdcCode(adc_samples[0][0]), AdcCode(adc_samples[1][0])];
@ -214,6 +229,9 @@ const APP: () = {
// Update AFEs // Update AFEs
c.resources.afes.0.set_gain(settings.afe[0]); c.resources.afes.0.set_gain(settings.afe[0]);
c.resources.afes.1.set_gain(settings.afe[1]); c.resources.afes.1.set_gain(settings.afe[1]);
let target = settings.stream_target.into();
c.resources.network.direct_stream(target);
} }
#[task(priority = 1, resources=[network, settings, telemetry], schedule=[telemetry])] #[task(priority = 1, resources=[network, settings, telemetry], schedule=[telemetry])]
@ -240,6 +258,14 @@ const APP: () = {
.unwrap(); .unwrap();
} }
#[task(priority = 1, resources=[network], schedule=[ethernet_link])]
fn ethernet_link(c: ethernet_link::Context) {
c.resources.network.processor.handle_link();
c.schedule
.ethernet_link(c.scheduled + SystemTimer::ticks_from_secs(1))
.unwrap();
}
#[task(binds = ETH, priority = 1)] #[task(binds = ETH, priority = 1)]
fn eth(_: eth::Context) { fn eth(_: eth::Context) {
unsafe { hal::ethernet::interrupt_handler() } unsafe { hal::ethernet::interrupt_handler() }

View File

@ -20,6 +20,7 @@ use stabilizer::{
DigitalInput0, DigitalInput1, AFE0, AFE1, DigitalInput0, DigitalInput1, AFE0, AFE1,
}, },
net::{ net::{
data_stream::{BlockGenerator, StreamTarget},
miniconf::Miniconf, miniconf::Miniconf,
serde::Deserialize, serde::Deserialize,
telemetry::{Telemetry, TelemetryBuffer}, telemetry::{Telemetry, TelemetryBuffer},
@ -64,6 +65,8 @@ pub struct Settings {
output_conf: [Conf; 2], output_conf: [Conf; 2],
telemetry_period: u16, telemetry_period: u16,
stream_target: StreamTarget,
} }
impl Default for Settings { impl Default for Settings {
@ -82,6 +85,8 @@ impl Default for Settings {
output_conf: [Conf::InPhase, Conf::Quadrature], output_conf: [Conf::InPhase, Conf::Quadrature],
// The default telemetry period in seconds. // The default telemetry period in seconds.
telemetry_period: 10, telemetry_period: 10,
stream_target: StreamTarget::default(),
} }
} }
} }
@ -96,19 +101,20 @@ const APP: () = {
settings: Settings, settings: Settings,
telemetry: TelemetryBuffer, telemetry: TelemetryBuffer,
digital_inputs: (DigitalInput0, DigitalInput1), digital_inputs: (DigitalInput0, DigitalInput1),
generator: BlockGenerator,
timestamper: InputStamper, timestamper: InputStamper,
pll: RPLL, pll: RPLL,
lockin: Lockin<4>, lockin: Lockin<4>,
} }
#[init(spawn=[settings_update, telemetry])] #[init(spawn=[settings_update, telemetry, ethernet_link])]
fn init(c: init::Context) -> init::LateResources { fn init(c: init::Context) -> init::LateResources {
// Configure the microcontroller // Configure the microcontroller
let (mut stabilizer, _pounder) = let (mut stabilizer, _pounder) =
hardware::setup::setup(c.core, c.device); hardware::setup::setup(c.core, c.device);
let network = NetworkUsers::new( let mut network = NetworkUsers::new(
stabilizer.net.stack, stabilizer.net.stack,
stabilizer.net.phy, stabilizer.net.phy,
stabilizer.cycle_counter, stabilizer.cycle_counter,
@ -116,6 +122,8 @@ const APP: () = {
stabilizer.net.mac_address, stabilizer.net.mac_address,
); );
let generator = network.enable_streaming();
let settings = Settings::default(); let settings = Settings::default();
let pll = RPLL::new( let pll = RPLL::new(
@ -127,6 +135,9 @@ const APP: () = {
c.spawn.settings_update().unwrap(); c.spawn.settings_update().unwrap();
c.spawn.telemetry().unwrap(); c.spawn.telemetry().unwrap();
// Spawn the ethernet link servicing task.
c.spawn.ethernet_link().unwrap();
// Enable ADC/DAC events // Enable ADC/DAC events
stabilizer.adcs.0.start(); stabilizer.adcs.0.start();
stabilizer.adcs.1.start(); stabilizer.adcs.1.start();
@ -152,6 +163,7 @@ const APP: () = {
telemetry: TelemetryBuffer::default(), telemetry: TelemetryBuffer::default(),
settings, settings,
generator,
pll, pll,
lockin: Lockin::default(), lockin: Lockin::default(),
@ -165,7 +177,7 @@ const APP: () = {
/// This is an implementation of a externally (DI0) referenced PLL lockin on the ADC0 signal. /// This is an implementation of a externally (DI0) referenced PLL lockin on the ADC0 signal.
/// It outputs either I/Q or power/phase on DAC0/DAC1. Data is normalized to full scale. /// It outputs either I/Q or power/phase on DAC0/DAC1. Data is normalized to full scale.
/// PLL bandwidth, filter bandwidth, slope, and x/y or power/phase post-filters are available. /// PLL bandwidth, filter bandwidth, slope, and x/y or power/phase post-filters are available.
#[task(binds=DMA1_STR4, resources=[adcs, dacs, lockin, timestamper, pll, settings, telemetry], priority=2)] #[task(binds=DMA1_STR4, resources=[adcs, dacs, lockin, timestamper, pll, settings, telemetry, generator], priority=2)]
#[inline(never)] #[inline(never)]
#[link_section = ".itcm.process"] #[link_section = ".itcm.process"]
fn process(mut c: process::Context) { fn process(mut c: process::Context) {
@ -177,6 +189,7 @@ const APP: () = {
ref mut lockin, ref mut lockin,
ref mut pll, ref mut pll,
ref mut timestamper, ref mut timestamper,
ref mut generator,
} = c.resources; } = c.resources;
let (reference_phase, reference_frequency) = match settings.lockin_mode let (reference_phase, reference_frequency) = match settings.lockin_mode
@ -249,6 +262,10 @@ const APP: () = {
*sample = DacCode::from(value as i16).0; *sample = DacCode::from(value as i16).0;
} }
} }
// Stream data
generator.send(&adc_samples, &dac_samples);
// Update telemetry measurements. // Update telemetry measurements.
telemetry.adcs = telemetry.adcs =
[AdcCode(adc_samples[0][0]), AdcCode(adc_samples[1][0])]; [AdcCode(adc_samples[0][0]), AdcCode(adc_samples[1][0])];
@ -282,6 +299,9 @@ const APP: () = {
c.resources.afes.1.set_gain(settings.afe[1]); c.resources.afes.1.set_gain(settings.afe[1]);
c.resources.settings.lock(|current| *current = *settings); c.resources.settings.lock(|current| *current = *settings);
let target = settings.stream_target.into();
c.resources.network.direct_stream(target);
} }
#[task(priority = 1, resources=[network, digital_inputs, settings, telemetry], schedule=[telemetry])] #[task(priority = 1, resources=[network, digital_inputs, settings, telemetry], schedule=[telemetry])]
@ -313,6 +333,14 @@ const APP: () = {
.unwrap(); .unwrap();
} }
#[task(priority = 1, resources=[network], schedule=[ethernet_link])]
fn ethernet_link(c: ethernet_link::Context) {
c.resources.network.processor.handle_link();
c.schedule
.ethernet_link(c.scheduled + SystemTimer::ticks_from_secs(1))
.unwrap();
}
#[task(binds = ETH, priority = 1)] #[task(binds = ETH, priority = 1)]
fn eth(_: eth::Context) { fn eth(_: eth::Context) {
unsafe { hal::ethernet::interrupt_handler() } unsafe { hal::ethernet::interrupt_handler() }

View File

@ -7,9 +7,6 @@ use stm32h7xx_hal::{
prelude::*, prelude::*,
}; };
const NUM_SOCKETS: usize = 4;
use heapless::Vec;
use smoltcp_nal::smoltcp; use smoltcp_nal::smoltcp;
use embedded_hal::digital::v2::{InputPin, OutputPin}; use embedded_hal::digital::v2::{InputPin, OutputPin};
@ -21,13 +18,18 @@ use super::{
NetworkStack, AFE0, AFE1, NetworkStack, AFE0, AFE1,
}; };
const NUM_TCP_SOCKETS: usize = 4;
const NUM_UDP_SOCKETS: usize = 1;
const NUM_SOCKETS: usize = NUM_UDP_SOCKETS + NUM_TCP_SOCKETS;
pub struct NetStorage { pub struct NetStorage {
pub ip_addrs: [smoltcp::wire::IpCidr; 1], pub ip_addrs: [smoltcp::wire::IpCidr; 1],
// Note: There is an additional socket set item required for the DHCP socket. // Note: There is an additional socket set item required for the DHCP socket.
pub sockets: pub sockets:
[Option<smoltcp::socket::SocketSetItem<'static>>; NUM_SOCKETS + 1], [Option<smoltcp::socket::SocketSetItem<'static>>; NUM_SOCKETS + 1],
pub socket_storage: [SocketStorage; NUM_SOCKETS], pub tcp_socket_storage: [TcpSocketStorage; NUM_TCP_SOCKETS],
pub udp_socket_storage: [UdpSocketStorage; NUM_UDP_SOCKETS],
pub neighbor_cache: pub neighbor_cache:
[Option<(smoltcp::wire::IpAddress, smoltcp::iface::Neighbor)>; 8], [Option<(smoltcp::wire::IpAddress, smoltcp::iface::Neighbor)>; 8],
pub routes_cache: pub routes_cache:
@ -39,13 +41,37 @@ pub struct NetStorage {
pub dhcp_rx_storage: [u8; 600], pub dhcp_rx_storage: [u8; 600],
} }
pub struct UdpSocketStorage {
rx_storage: [u8; 1024],
tx_storage: [u8; 2048],
tx_metadata:
[smoltcp::storage::PacketMetadata<smoltcp::wire::IpEndpoint>; 10],
rx_metadata:
[smoltcp::storage::PacketMetadata<smoltcp::wire::IpEndpoint>; 10],
}
impl UdpSocketStorage {
const fn new() -> Self {
Self {
rx_storage: [0; 1024],
tx_storage: [0; 2048],
tx_metadata: [smoltcp::storage::PacketMetadata::<
smoltcp::wire::IpEndpoint,
>::EMPTY; 10],
rx_metadata: [smoltcp::storage::PacketMetadata::<
smoltcp::wire::IpEndpoint,
>::EMPTY; 10],
}
}
}
#[derive(Copy, Clone)] #[derive(Copy, Clone)]
pub struct SocketStorage { pub struct TcpSocketStorage {
rx_storage: [u8; 1024], rx_storage: [u8; 1024],
tx_storage: [u8; 1024], tx_storage: [u8; 1024],
} }
impl SocketStorage { impl TcpSocketStorage {
const fn new() -> Self { const fn new() -> Self {
Self { Self {
rx_storage: [0; 1024], rx_storage: [0; 1024],
@ -63,8 +89,9 @@ impl NetStorage {
)], )],
neighbor_cache: [None; 8], neighbor_cache: [None; 8],
routes_cache: [None; 8], routes_cache: [None; 8],
sockets: [None, None, None, None, None], sockets: [None, None, None, None, None, None],
socket_storage: [SocketStorage::new(); NUM_SOCKETS], tcp_socket_storage: [TcpSocketStorage::new(); NUM_TCP_SOCKETS],
udp_socket_storage: [UdpSocketStorage::new(); NUM_UDP_SOCKETS],
dhcp_tx_storage: [0; 600], dhcp_tx_storage: [0; 600],
dhcp_rx_storage: [0; 600], dhcp_rx_storage: [0; 600],
dhcp_rx_metadata: [smoltcp::socket::RawPacketMetadata::EMPTY; 1], dhcp_rx_metadata: [smoltcp::socket::RawPacketMetadata::EMPTY; 1],
@ -634,20 +661,18 @@ pub fn setup(
let neighbor_cache = let neighbor_cache =
smoltcp::iface::NeighborCache::new(&mut store.neighbor_cache[..]); smoltcp::iface::NeighborCache::new(&mut store.neighbor_cache[..]);
let interface = smoltcp::iface::EthernetInterfaceBuilder::new(eth_dma) let interface = smoltcp::iface::InterfaceBuilder::new(eth_dma)
.ethernet_addr(mac_addr) .ethernet_addr(mac_addr)
.neighbor_cache(neighbor_cache) .neighbor_cache(neighbor_cache)
.ip_addrs(&mut store.ip_addrs[..]) .ip_addrs(&mut store.ip_addrs[..])
.routes(routes) .routes(routes)
.finalize(); .finalize();
let (mut sockets, handles) = { let sockets = {
let mut sockets = let mut sockets =
smoltcp::socket::SocketSet::new(&mut store.sockets[..]); smoltcp::socket::SocketSet::new(&mut store.sockets[..]);
let mut handles: Vec<smoltcp::socket::SocketHandle, 64> = for storage in store.tcp_socket_storage[..].iter_mut() {
Vec::new();
for storage in store.socket_storage.iter_mut() {
let tcp_socket = { let tcp_socket = {
let rx_buffer = smoltcp::socket::TcpSocketBuffer::new( let rx_buffer = smoltcp::socket::TcpSocketBuffer::new(
&mut storage.rx_storage[..], &mut storage.rx_storage[..],
@ -658,34 +683,28 @@ pub fn setup(
smoltcp::socket::TcpSocket::new(rx_buffer, tx_buffer) smoltcp::socket::TcpSocket::new(rx_buffer, tx_buffer)
}; };
let handle = sockets.add(tcp_socket); sockets.add(tcp_socket);
handles.push(handle).unwrap();
} }
(sockets, handles) for storage in store.udp_socket_storage[..].iter_mut() {
}; let udp_socket = {
let rx_buffer = smoltcp::socket::UdpSocketBuffer::new(
&mut storage.rx_metadata[..],
&mut storage.rx_storage[..],
);
let tx_buffer = smoltcp::socket::UdpSocketBuffer::new(
&mut storage.tx_metadata[..],
&mut storage.tx_storage[..],
);
let dhcp_client = { smoltcp::socket::UdpSocket::new(rx_buffer, tx_buffer)
let dhcp_rx_buffer = smoltcp::socket::RawSocketBuffer::new( };
&mut store.dhcp_rx_metadata[..], sockets.add(udp_socket);
&mut store.dhcp_rx_storage[..], }
);
let dhcp_tx_buffer = smoltcp::socket::RawSocketBuffer::new( sockets.add(smoltcp::socket::Dhcpv4Socket::new());
&mut store.dhcp_tx_metadata[..],
&mut store.dhcp_tx_storage[..],
);
smoltcp::dhcp::Dhcpv4Client::new( sockets
&mut sockets,
dhcp_rx_buffer,
dhcp_tx_buffer,
// Smoltcp indicates that an instant with a negative time is indicative that time is
// not yet available. We can't get the current instant yet, so indicate an invalid
// time value.
smoltcp::time::Instant::from_millis(-1),
)
}; };
let random_seed = { let random_seed = {
@ -696,12 +715,7 @@ pub fn setup(
data data
}; };
let mut stack = smoltcp_nal::NetworkStack::new( let mut stack = smoltcp_nal::NetworkStack::new(interface, sockets);
interface,
sockets,
&handles,
Some(dhcp_client),
);
stack.seed_random_port(&random_seed); stack.seed_random_port(&random_seed);

353
src/net/data_stream.rs Normal file
View File

@ -0,0 +1,353 @@
///! Stabilizer data stream capabilities
///!
///! # Design
///! Stabilizer data streamining utilizes UDP packets to send live data streams at high throughput.
///! Packets are always sent in a best-effort fashion, and data may be dropped. Each packet contains
///! an identifier that can be used to detect any dropped data.
///!
///! The current implementation utilizes an single-producer, single-consumer queue to send data
///! between a high priority task and the UDP transmitter.
///!
///! A "batch" of data is defined to be a single item in the SPSC queue sent to the UDP transmitter
///! thread. The transmitter thread then serializes as many sequential "batches" into a single UDP
///! packet as possible. The UDP packet is also given a header indicating the starting batch
///! sequence number and the number of batches present. If the UDP transmitter encounters a
///! non-sequential batch, it does not enqueue it into the packet and instead transmits any staged
///! data. The non-sequential batch is then transmitted in a new UDP packet. This method allows a
///! receiver to detect dropped batches (e.g. due to processing overhead).
use heapless::spsc::{Consumer, Producer, Queue};
use miniconf::MiniconfAtomic;
use serde::Deserialize;
use smoltcp_nal::embedded_nal::{IpAddr, Ipv4Addr, SocketAddr, UdpClientStack};
use super::NetworkReference;
use crate::hardware::design_parameters::SAMPLE_BUFFER_SIZE;
// The number of data blocks that we will buffer in the queue.
const BLOCK_BUFFER_SIZE: usize = 30;
// A factor that data may be subsampled at.
const SUBSAMPLE_RATE: usize = 1;
/// Represents the destination for the UDP stream to send data to.
#[derive(Copy, Clone, Debug, MiniconfAtomic, Deserialize)]
pub struct StreamTarget {
pub ip: [u8; 4],
pub port: u16,
}
impl Default for StreamTarget {
fn default() -> Self {
Self {
ip: [0; 4],
port: 0,
}
}
}
impl From<StreamTarget> for SocketAddr {
fn from(target: StreamTarget) -> SocketAddr {
SocketAddr::new(
IpAddr::V4(Ipv4Addr::new(
target.ip[0],
target.ip[1],
target.ip[2],
target.ip[3],
)),
target.port,
)
}
}
/// A basic "batch" of data.
// Note: In the future, the stream may be generic over this type.
#[derive(Debug, Copy, Clone)]
pub struct AdcDacData {
block_id: u16,
adcs: [[u16; SAMPLE_BUFFER_SIZE]; 2],
dacs: [[u16; SAMPLE_BUFFER_SIZE]; 2],
}
/// Configure streaming on a device.
///
/// # Args
/// * `stack` - A reference to the shared network stack.
///
/// # Returns
/// (generator, stream) where `generator` can be used to enqueue "batches" for transmission. The
/// `stream` is the logically consumer (UDP transmitter) of the enqueued data.
pub fn setup_streaming(
stack: NetworkReference,
) -> (BlockGenerator, DataStream) {
let queue = cortex_m::singleton!(: Queue<AdcDacData, BLOCK_BUFFER_SIZE> = Queue::new()).unwrap();
let (producer, consumer) = queue.split();
let generator = BlockGenerator::new(producer);
let stream = DataStream::new(stack, consumer);
(generator, stream)
}
/// The data generator for a stream.
pub struct BlockGenerator {
queue: Producer<'static, AdcDacData, BLOCK_BUFFER_SIZE>,
current_id: u16,
}
impl BlockGenerator {
/// Construct a new generator.
/// # Args
/// * `queue` - The producer portion of the SPSC queue to enqueue data into.
///
/// # Returns
/// The generator to use.
fn new(queue: Producer<'static, AdcDacData, BLOCK_BUFFER_SIZE>) -> Self {
Self {
queue,
current_id: 0,
}
}
/// Schedule data to be sent by the generator.
///
/// # Note
/// If no space is available, the data batch may be silently dropped.
///
/// # Args
/// * `adcs` - The ADC data to transmit.
/// * `dacs` - The DAC data to transmit.
pub fn send(
&mut self,
adcs: &[&mut [u16; SAMPLE_BUFFER_SIZE]; 2],
dacs: &[&mut [u16; SAMPLE_BUFFER_SIZE]; 2],
) {
let block = AdcDacData {
block_id: self.current_id,
adcs: [*adcs[0], *adcs[1]],
dacs: [*dacs[0], *dacs[1]],
};
self.current_id = self.current_id.wrapping_add(1);
self.queue.enqueue(block).ok();
}
}
/// Represents a single UDP packet sent by the stream.
///
/// # Packet Format
/// All data is sent in network-endian format. The format is as follows
///
/// Header:
/// [0..2]: Start block ID (u16)
/// [2..3]: Num Blocks present (u8) <N>
/// [3..4]: Batch Size (u8) <BS>
///
/// Following the header, batches are added sequentially. Each batch takes the form of:
/// [<BS>*0..<BS>*2]: ADC0
/// [<BS>*2..<BS>*4]: ADC1
/// [<BS>*4..<BS>*6]: DAC0
/// [<BS>*6..<BS>*8]: DAC1
struct DataPacket<'a> {
buf: &'a mut [u8],
subsample_rate: usize,
start_id: Option<u16>,
num_blocks: u8,
write_index: usize,
}
impl<'a> DataPacket<'a> {
/// Construct a new packet.
///
/// # Args
/// * `buf` - The location to serialize the data packet into.
/// * `subsample_rate` - The factor at which to subsample data from batches.
pub fn new(buf: &'a mut [u8], subsample_rate: usize) -> Self {
Self {
buf,
start_id: None,
num_blocks: 0,
subsample_rate,
write_index: 4,
}
}
/// Add a batch of data to the packet.
///
/// # Note
/// Serialization occurs as the packet is added.
///
/// # Args
/// * `batch` - The batch to add to the packet.
pub fn add_batch(&mut self, batch: &AdcDacData) -> Result<(), ()> {
// Check that the block is sequential.
if let Some(id) = &self.start_id {
if batch.block_id != id.wrapping_add(self.num_blocks.into()) {
return Err(());
}
} else {
// Otherwise, this is the first block. Record the strt ID.
self.start_id = Some(batch.block_id);
}
// Check that there is space for the block.
let block_size_bytes = SAMPLE_BUFFER_SIZE / self.subsample_rate * 4 * 2;
if self.buf.len() - self.get_packet_size() < block_size_bytes {
return Err(());
}
// Copy the samples into the buffer.
for device in &[batch.adcs, batch.dacs] {
for channel in device {
for sample in channel.iter().step_by(self.subsample_rate) {
self.buf[self.write_index..self.write_index + 2]
.copy_from_slice(&sample.to_be_bytes());
self.write_index += 2;
}
}
}
self.num_blocks += 1;
Ok(())
}
fn get_packet_size(&self) -> usize {
let header_length = 4;
let block_sample_size = SAMPLE_BUFFER_SIZE / self.subsample_rate;
let block_size_bytes = block_sample_size * 2 * 4;
block_size_bytes * self.num_blocks as usize + header_length
}
/// Complete the packet and prepare it for transmission.
///
/// # Returns
/// The size of the packet. The user should utilize the original buffer provided for packet
/// construction to access the packet.
pub fn finish(self) -> usize {
let block_sample_size = SAMPLE_BUFFER_SIZE / self.subsample_rate;
// Write the header into the block.
self.buf[0..2].copy_from_slice(&self.start_id.unwrap().to_be_bytes());
self.buf[2] = self.num_blocks;
self.buf[3] = block_sample_size as u8;
// Return the length of the packet to transmit.
self.get_packet_size()
}
}
/// The "consumer" portion of the data stream.
///
/// # Note
/// This is responsible for consuming data and sending it over UDP.
pub struct DataStream {
stack: NetworkReference,
socket: Option<<NetworkReference as UdpClientStack>::UdpSocket>,
queue: Consumer<'static, AdcDacData, BLOCK_BUFFER_SIZE>,
remote: SocketAddr,
buffer: [u8; 1024],
}
impl DataStream {
/// Construct a new data streamer.
///
/// # Args
/// * `stack` - A reference to the shared network stack.
/// * `consumer` - The read side of the queue containing data to transmit.
fn new(
stack: NetworkReference,
consumer: Consumer<'static, AdcDacData, BLOCK_BUFFER_SIZE>,
) -> Self {
Self {
stack,
socket: None,
remote: StreamTarget::default().into(),
queue: consumer,
buffer: [0; 1024],
}
}
fn close(&mut self) {
// Note(unwrap): We guarantee that the socket is available above.
let socket = self.socket.take().unwrap();
self.stack.close(socket).unwrap();
}
fn open(&mut self, remote: SocketAddr) -> Result<(), ()> {
if self.socket.is_some() {
self.close();
}
// If the remote address is unspecified, just close the existing socket.
if remote.ip().is_unspecified() {
if self.socket.is_some() {
self.close();
}
return Err(());
}
let mut socket = self.stack.socket().map_err(|_| ())?;
// Note(unwrap): We only connect with a new socket, so it is guaranteed to not already be
// bound.
self.stack.connect(&mut socket, remote).unwrap();
self.socket.replace(socket);
Ok(())
}
/// Configure the remote endpoint of the stream.
///
/// # Args
/// * `remote` - The destination to send stream data to.
pub fn set_remote(&mut self, remote: SocketAddr) {
// If the remote is identical to what we already have, do nothing.
if remote == self.remote {
return;
}
// Open the new remote connection.
self.open(remote).ok();
self.remote = remote;
}
/// Process any data for transmission.
pub fn process(&mut self) {
// If there's no socket available, try to connect to our remote.
if self.socket.is_none() {
// If we can't open the socket (e.g. we do not have an IP address yet), clear data from
// the queue.
if self.open(self.remote).is_err() {
while self.queue.ready() {
self.queue.dequeue();
}
return;
}
}
if self.queue.ready() {
// Dequeue data from the queue into a larger block structure.
let mut packet = DataPacket::new(&mut self.buffer, SUBSAMPLE_RATE);
while self.queue.ready() {
// Note(unwrap): We check above that the queue is ready before calling this.
if packet.add_batch(self.queue.peek().unwrap()).is_err() {
// If we cannot add another batch, break out of the loop and send the packet.
break;
}
// Remove the batch that we just added.
self.queue.dequeue();
}
// Transmit the data block.
let mut handle = self.socket.as_mut().unwrap();
let size = packet.finish();
self.stack.send(&mut handle, &self.buffer[..size]).ok();
}
}
}

View File

@ -9,6 +9,7 @@ pub use heapless;
pub use miniconf; pub use miniconf;
pub use serde; pub use serde;
pub mod data_stream;
pub mod messages; pub mod messages;
pub mod miniconf_client; pub mod miniconf_client;
pub mod network_processor; pub mod network_processor;
@ -16,6 +17,7 @@ pub mod shared;
pub mod telemetry; pub mod telemetry;
use crate::hardware::{cycle_counter::CycleCounter, EthernetPhy, NetworkStack}; use crate::hardware::{cycle_counter::CycleCounter, EthernetPhy, NetworkStack};
use data_stream::{BlockGenerator, DataStream};
use messages::{MqttMessage, SettingsResponse}; use messages::{MqttMessage, SettingsResponse};
use miniconf_client::MiniconfClient; use miniconf_client::MiniconfClient;
use network_processor::NetworkProcessor; use network_processor::NetworkProcessor;
@ -26,6 +28,7 @@ use core::fmt::Write;
use heapless::String; use heapless::String;
use miniconf::Miniconf; use miniconf::Miniconf;
use serde::Serialize; use serde::Serialize;
use smoltcp_nal::embedded_nal::SocketAddr;
pub type NetworkReference = shared::NetworkStackProxy<'static, NetworkStack>; pub type NetworkReference = shared::NetworkStackProxy<'static, NetworkStack>;
@ -45,6 +48,8 @@ pub enum NetworkState {
pub struct NetworkUsers<S: Default + Clone + Miniconf, T: Serialize> { pub struct NetworkUsers<S: Default + Clone + Miniconf, T: Serialize> {
pub miniconf: MiniconfClient<S>, pub miniconf: MiniconfClient<S>,
pub processor: NetworkProcessor, pub processor: NetworkProcessor,
stream: DataStream,
generator: Option<BlockGenerator>,
pub telemetry: TelemetryClient<T>, pub telemetry: TelemetryClient<T>,
} }
@ -95,10 +100,30 @@ where
&prefix, &prefix,
); );
let (generator, stream) =
data_stream::setup_streaming(stack_manager.acquire_stack());
NetworkUsers { NetworkUsers {
miniconf: settings, miniconf: settings,
processor, processor,
telemetry, telemetry,
stream,
generator: Some(generator),
}
}
/// Enable live data streaming.
pub fn enable_streaming(&mut self) -> BlockGenerator {
self.generator.take().unwrap()
}
/// Direct the stream to the provided remote target.
///
/// # Args
/// * `remote` - The destination for the streamed data.
pub fn direct_stream(&mut self, remote: SocketAddr) {
if self.generator.is_none() {
self.stream.set_remote(remote);
} }
} }
@ -107,15 +132,20 @@ where
/// # Returns /// # Returns
/// An indication if any of the network users indicated a state change. /// An indication if any of the network users indicated a state change.
pub fn update(&mut self) -> NetworkState { pub fn update(&mut self) -> NetworkState {
// Update the MQTT clients.
self.telemetry.update();
// Update the data stream.
if self.generator.is_none() {
self.stream.process();
}
// Poll for incoming data. // Poll for incoming data.
let poll_result = match self.processor.update() { let poll_result = match self.processor.update() {
UpdateState::NoChange => NetworkState::NoChange, UpdateState::NoChange => NetworkState::NoChange,
UpdateState::Updated => NetworkState::Updated, UpdateState::Updated => NetworkState::Updated,
}; };
// Update the MQTT clients.
self.telemetry.update();
match self.miniconf.update() { match self.miniconf.update() {
UpdateState::Updated => NetworkState::SettingsChanged, UpdateState::Updated => NetworkState::SettingsChanged,
UpdateState::NoChange => poll_result, UpdateState::NoChange => poll_result,

View File

@ -37,6 +37,27 @@ impl NetworkProcessor {
} }
} }
/// Handle ethernet link connection status.
///
/// # Note
/// This may take non-trivial amounts of time to communicate with the PHY. As such, this should
/// only be called as often as necessary (e.g. once per second or so).
pub fn handle_link(&mut self) {
// If the PHY indicates there's no more ethernet link, reset the DHCP server in the network
// stack.
match self.phy.poll_link() {
true => self.network_was_reset = false,
// Only reset the network stack once per link reconnection. This prevents us from
// sending an excessive number of DHCP requests.
false if !self.network_was_reset => {
self.network_was_reset = true;
self.stack.lock(|stack| stack.handle_link_reset());
}
_ => {}
};
}
/// Process and update the state of the network. /// Process and update the state of the network.
/// ///
/// # Note /// # Note
@ -52,24 +73,7 @@ impl NetworkProcessor {
let result = match self.stack.lock(|stack| stack.poll(now)) { let result = match self.stack.lock(|stack| stack.poll(now)) {
Ok(true) => UpdateState::Updated, Ok(true) => UpdateState::Updated,
Ok(false) => UpdateState::NoChange, Ok(false) => UpdateState::NoChange,
Err(err) => { Err(_) => UpdateState::Updated,
log::info!("Network error: {:?}", err);
UpdateState::Updated
}
};
// If the PHY indicates there's no more ethernet link, reset the DHCP server in the network
// stack.
match self.phy.poll_link() {
true => self.network_was_reset = false,
// Only reset the network stack once per link reconnection. This prevents us from
// sending an excessive number of DHCP requests.
false if !self.network_was_reset => {
self.network_was_reset = true;
self.stack.lock(|stack| stack.handle_link_reset());
}
_ => {}
}; };
result result

View File

@ -69,6 +69,21 @@ where
forward! {close(socket: S::TcpSocket) -> Result<(), S::Error>} forward! {close(socket: S::TcpSocket) -> Result<(), S::Error>}
} }
impl<'a, S> embedded_nal::UdpClientStack for NetworkStackProxy<'a, S>
where
S: embedded_nal::UdpClientStack,
{
type UdpSocket = S::UdpSocket;
type Error = S::Error;
forward! {socket() -> Result<S::UdpSocket, S::Error>}
forward! {connect(socket: &mut S::UdpSocket, remote: embedded_nal::SocketAddr) -> Result<(), S::Error>}
forward! {send(socket: &mut S::UdpSocket, buffer: &[u8]) -> embedded_nal::nb::Result<(), S::Error>}
forward! {receive(socket: &mut S::UdpSocket, buffer: &mut [u8]) -> embedded_nal::nb::Result<(usize, embedded_nal::SocketAddr), S::Error>}
forward! {close(socket: S::UdpSocket) -> Result<(), S::Error>}
}
impl NetworkManager { impl NetworkManager {
/// Construct a new manager for a shared network stack /// Construct a new manager for a shared network stack
/// ///