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embassy-rs / embassy

Modern embedded framework, using Rust and async.
https://embassy.dev
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embassy-usb: stm32f4/usb_ethernet example shows no link in ubuntu 22.04 #2376

Open shuanglengyunji opened 6 months ago

shuanglengyunji commented 6 months ago

I run the stm32f4/usb_ethernet example on a stm32f4discovery board with static ip. It works on an iPhone 15 runs IOS17, while doesn't work on ubuntu 22.04 running on DELL Precision 15. On the ubuntu 22.04, I manually configured IP address on the ubuntu, while it shows: 

➜  ~ ifconfig enx888888888888                  
enx888888888888: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500
        inet 192.168.10.1  netmask 255.255.255.0  broadcast 192.168.10.255
        ether 88:88:88:88:88:88  txqueuelen 1000  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

➜  ~ ip addr show dev enx888888888888          
6: enx888888888888: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc fq_codel state DOWN group default qlen 1000
    link/ether 88:88:88:88:88:88 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.1/24 brd 192.168.10.255 scope global enx888888888888
       valid_lft forever preferred_lft forever

➜  ~ sudo ethtool enx888888888888         
Settings for enx888888888888:
    Supported ports: [  ]
    Supported link modes:   Not reported
    Supported pause frame use: No
    Supports auto-negotiation: No
    Supported FEC modes: Not reported
    Advertised link modes:  Not reported
    Advertised pause frame use: No
    Advertised auto-negotiation: No
    Advertised FEC modes: Not reported
    Speed: Unknown!
    Duplex: Half
    Auto-negotiation: off
    Port: Twisted Pair
    PHYAD: 0
    Transceiver: internal
    MDI-X: Unknown
        Current message level: 0x00000007 (7)
                               drv probe link
    Link detected: no

I have also tried:

  1. Disable USB autosuspend from kernel bootargs
  2. Disable VBUS detection

It works on the iPhone. I had also made it similar implementation work on this board with TinyUSB RNDIS driver. Could someone please give me some direction on debugging it?

On the device log, it shows USB goes into suspend mode on its own: 

0.000000 INFO  Hello World!
└─ usb_ethernet::____embassy_main_task::{async_fn#0} @ src/bin/usb_ethernet.rs:49  
0.000000 TRACE BDCR ok: 00008200
└─ embassy_stm32::rcc::bd::{impl#2}::init @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000000 DEBUG flash: latency=5
└─ embassy_stm32::rcc::_version::init @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:130 
0.000000 DEBUG rcc: Clocks { sys: Hertz(168000000), pclk1: Hertz(42000000), pclk1_tim: Hertz(84000000), pclk2: Hertz(84000000), pclk2_tim: Hertz(168000000), hclk1: Hertz(168000000), hclk2: Hertz(168000000), hclk3: Hertz(168000000), plli2s1_q: None, plli2s1_r: None, pll1_q: Some(Hertz(48000000)), rtc: Some(Hertz(32000)) }
└─ embassy_stm32::rcc::set_freqs @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:130 
0.000061 TRACE allocating type=Interrupt mps=8 interval_ms=255, dir=In
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000091 TRACE   index=1
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000122 TRACE allocating type=Bulk mps=64 interval_ms=0, dir=Out
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000152 TRACE   index=1
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000183 TRACE allocating type=Bulk mps=64 interval_ms=0, dir=In
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000213 TRACE   index=2
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000244 INFO  USB: device_descriptor used: 18
└─ embassy_usb::builder::{impl#1}::build @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:143 
0.000274 INFO  USB: config_descriptor used: 94
└─ embassy_usb::builder::{impl#1}::build @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:143 
0.000305 INFO  USB: bos_descriptor used: 12
└─ embassy_usb::builder::{impl#1}::build @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:143 
0.000305 INFO  USB: msos_descriptor used: 0
└─ embassy_usb::builder::{impl#1}::build @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:143 
0.000335 INFO  USB: control_buf size: 128
└─ embassy_usb::builder::{impl#1}::build @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:143 
0.000366 TRACE allocating type=Control mps=64 interval_ms=0, dir=Out
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000396 TRACE   index=0
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000427 TRACE allocating type=Control mps=64 interval_ms=0, dir=In
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000457 TRACE   index=0
└─ embassy_stm32::usb_otg::usb::{impl#6}::alloc_endpoint @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000457 TRACE start
└─ embassy_stm32::usb_otg::usb::{impl#7}::start @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.000854 DEBUG IPv4: UP
└─ embassy_net::{impl#5}::apply_static_config @ /home/han/Codes/embassy/embassy-net/src/fmt.rs:130 
0.000854 DEBUG    IP address:      192.168.10.2/24
└─ embassy_net::{impl#5}::apply_static_config @ /home/han/Codes/embassy/embassy-net/src/fmt.rs:130 
0.000915 DEBUG    Default gateway: Some(192.168.10.1)
└─ embassy_net::{impl#5}::apply_static_config @ /home/han/Codes/embassy/embassy-net/src/fmt.rs:130 
0.001068 TRACE [0]: adding
└─ smoltcp::iface::socket_set::{impl#2}::add::put @ /home/han/.cargo/registry/src/index.crates.io-6f17d22bba15001f/smoltcp-0.11.0/src/macros.rs:17  
0.001098 INFO  Listening on TCP:1234...
└─ usb_ethernet::____embassy_main_task::{async_fn#0} @ src/bin/usb_ethernet.rs:162 
0.001098 TRACE state=Closed=>Listen
└─ smoltcp::socket::tcp::{impl#9}::set_state @ /home/han/.cargo/registry/src/index.crates.io-6f17d22bba15001f/smoltcp-0.11.0/src/macros.rs:17  
0.001129 INFO  net_task
└─ usb_ethernet::__net_task_task::{async_fn#0} @ src/bin/usb_ethernet.rs:38  
0.001159 INFO  usb_ncm_task
└─ usb_ethernet::__usb_ncm_task_task::{async_fn#0} @ src/bin/usb_ethernet.rs:32  
0.001220 TRACE WAITING for connection
└─ embassy_usb::class::cdc_ncm::embassy_net::{impl#1}::run::{async_fn#0}::{async_block#0} @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:117 
0.001251 INFO  usb_task
└─ usb_ethernet::__usb_task_task::{async_fn#0} @ src/bin/usb_ethernet.rs:26  
0.001281 TRACE Core id 00001200
└─ embassy_stm32::usb_otg::usb::{impl#9}::init @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.001281 TRACE usb: power detected
└─ embassy_usb::{impl#2}::handle_bus_event::{async_fn#0} @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:117 
0.001312 TRACE irq
└─ embassy_stm32::usb_otg::usb::{impl#0}::on_interrupt @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.001312 TRACE enable
└─ embassy_stm32::usb_otg::usb::{impl#10}::enable::{async_fn#0} @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.001342 TRACE vbus detected
└─ embassy_stm32::usb_otg::usb::{impl#10}::poll::{async_fn#0}::{closure#0} @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.001342 TRACE SETUP waiting
└─ embassy_stm32::usb_otg::usb::{impl#18}::setup::{async_fn#0}::{closure#0} @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.007293 TRACE irq
└─ embassy_stm32::usb_otg::usb::{impl#0}::on_interrupt @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.007324 TRACE suspend
└─ embassy_stm32::usb_otg::usb::{impl#10}::poll::{async_fn#0}::{closure#0} @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.007324 TRACE usb: suspend
└─ embassy_usb::{impl#2}::handle_bus_event::{async_fn#0} @ /home/han/Codes/embassy/embassy-usb/src/fmt.rs:117 
0.183746 TRACE irq
└─ embassy_stm32::usb_otg::usb::{impl#0}::on_interrupt @ /home/han/Codes/embassy/embassy-stm32/src/fmt.rs:117 
0.183746 TRACE reset

Thank you all

shuanglengyunji commented 6 months ago

Update: I found a walk-around: add sleep between spawner.spawn(usb_task(usb)) and spawner.spawn(usb_ncm_task(runner)) will make it work on ubuntu 22.04. 

// Build the builder.
let usb = builder.build();

unwrap!(spawner.spawn(usb_task(usb)));
Timer::after_millis(1000).await;                     <====== ADD SLEEP HERE

static NET_STATE: StaticCell<NetState<MTU, 4, 4>> = StaticCell::new();
let (runner, device) = class.into_embassy_net_device::<MTU, 4, 4>(NET_STATE.init(NetState::new()), our_mac_addr);
unwrap!(spawner.spawn(usb_ncm_task(runner)));

In debugging it, I found the usb_ncm_task(runner) has been scheduled before usb_task(usb) on stm32f407 by the scheduler, although the usb_task is spawned before the usb_ncm_task. Adding a sleep before usb_ncm_task will ensure the usb_task to be executed first, and it seems to address the problem. However, I still don't understand the root cause of the problem.

makeshared commented 1 week ago

Thanks @shuanglengyunji - can confirm the workaround fixes usb_ethernet on stm32h753zi as well :+1: