cannot find my WCH-Link #1121

kaidegit · 2021-03-13T03:51:58Z

WCH-Link is a CMSIS-dap debugger made by WCH.

It can be found by Keil and OpenOCD when adding the command cmsis_dap_vid_pid 0x1a86 0x8011.

However, it cannot be found by PyOCD. When I run pyocd list, it just shows No available debug probes are connected.

The text was updated successfully, but these errors were encountered:

flit · 2021-03-15T21:32:23Z

Hi, several questions.

What pyocd version? (pyocd --version)

What OS are you using?

Can you please provide a USB descriptor dump?

lsusb -v on Linux
usbview.exe on Windows
several options here for macOS.

Could you please provide the log for pyocd list -vv? This will output any debug logs, potentially including USB errors.

Thanks!

kaidegit · 2021-03-16T04:00:24Z

The pyocd version is 0.30.3.dev0+dirty.

I'm using macOS Big Sur(11.0.1).

I ran lsusb -v on my Mac and it says:

            WCH-Link:

              Product ID: 0x8011
              Vendor ID: 0x1a86
              Version: 1.02
              Serial Number: 0001A0000001
              Speed: Up to 12 Mb/s
              Manufacturer: wch.cn
              Location ID: 0x14a40000 / 8
              Current Available (mA): 500
              Current Required (mA): 500
              Extra Operating Current (mA): 0

The log for pyocd list -vv is

0001355:DEBUG:session:Project directory: /Users/kai
0001370:DEBUG:pemicro:Opened PEMicro library: /Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/site-packages/pypemicro-0.1.5-py3.8.egg/pypemicro/libs/MacOS/unitacmp-64.dylib
No available debug probes are connected

kaidegit · 2021-03-16T04:14:35Z

However, i can find the wchlink on my windows laptop.....

system version: Windows 10 Pro 21H1

pyocd version: 0.29.0

pyocd list -vv
0003547:DEBUG:session:Project directory: C:\Users\yekai
0003662:WARNING:common:STLink and CMSIS-DAPv2 probes are not supported because no libusb library was found.
  #   Probe                  Unique ID
-------------------------------------------
  0   wch.cn WCH CMSIS-DAP   0001A0000001

flit · 2021-03-19T22:32:50Z

Apologies for taking a while to get back to this. Unfortunately the lsusb call on your Mac didn't provide the descriptors I need. Would you mind trying out this:

$ brew install mikhailai/misc/usbutils
$ lsusb -v -d 1a86:8011  > usb-descriptors.txt

Then attach the usb-descriptors.txt file to a comment here.

If you still have the lsusb package installed, you'll have to either uninstall it or run brew unlink lsusb first, as it conflicts with usbutils.

Another option would be to run usbview.exe on your Windows laptop and copy the info text dump. The data will be the same.

Another test to run would be to try this Python command:

$ python -c "import pprint, hid ; pprint.pprint(hid.enumerate())"

This will dump info about all available USB HID devices, as the hidapi library sees them. (pyocd uses hidapi for communicating with HID devices on macOS and Windows, though pyocd <0.30 on Windows used pywinusb instead by default.)

kaidegit · 2021-03-20T10:06:30Z

Bus 020 Device 012: ID 1a86:8011 QinHeng Electronics 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          239 Miscellaneous Device
  bDeviceSubClass         2 ?
  bDeviceProtocol         1 Interface Association
  bMaxPacketSize0         8
  idVendor           0x1a86 QinHeng Electronics
  idProduct          0x8011 
  bcdDevice            1.02
  iManufacturer           1 wch.cn
  iProduct                2 WCH-Link
  iSerial                 3 0001A0000001
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength          107
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              500mA
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         0
      bInterfaceCount         2
      bFunctionClass          2 Communications
      bFunctionSubClass       2 Abstract (modem)
      bFunctionProtocol       1 AT-commands (v.25ter)
      iFunction               4 WCH CMSIS-DAP
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol      0 None
      iInterface              4 WCH CMSIS-DAP
      CDC Header:
        bcdCDC               1.10
      CDC Call Management:
        bmCapabilities       0x01
          call management
        bDataInterface          1
      CDC ACM:
        bmCapabilities       0x02
          line coding and serial state
      CDC Union:
        bMasterInterface        0
        bSlaveInterface         1 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x84  EP 4 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               2
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 Unused
      bInterfaceProtocol      0 
      iInterface              5 (error)
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass         3 Human Interface Device
      bInterfaceSubClass      0 No Subclass
      bInterfaceProtocol      0 None
      iInterface              6 (error)
        HID Device Descriptor:
          bLength                 9
          bDescriptorType        33
          bcdHID               1.00
          bCountryCode            0 Not supported
          bNumDescriptors         1
          bDescriptorType        34 Report
          wDescriptorLength      33
         Report Descriptors: 
           ** UNAVAILABLE **
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x01  EP 1 OUT
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
Device Status:     0x0000
  (Bus Powered)

{'interface_number': 2,
  'manufacturer_string': 'wch.cn',
  'path': b'IOService:/AppleACPIPlatformExpert/PCI0@0/AppleACPIPCI/XHC@14/XH'
          b'C@14000000/HS10@14a00000/USB 2.0 Hub [MTT]@14a00000/AppleUSB20Hu'
          b'b@14a00000/AppleUSB20HubPort@14a40000/WCH-Link@14a40000/WCH CMSI'
          b'S-DAP@2/AppleUserUSBHostHIDDevice',
  'product_id': 32785,
  'product_string': 'WCH-Link',
  'release_number': 258,
  'serial_number': '0001A0000001',
  'usage': 1,
  'usage_page': 65280,
  'vendor_id': 6790},

flit · 2021-03-20T18:10:20Z

Thanks! The reason it's not detected is pretty simple: there's no "CMSIS-DAP" in the device's product name string.

The CMSIS-DAP specification also allows for "CMSIS-DAP" to appear in the interface name string. But the hidapi library doesn't report the interface's name (if it has one). And, the interface name descriptors are apparently messed up on the WCH-Link: the CDC interface association and first CDC interface have the name "WCH CMSIS-DAP", but the CMSIS-DAP HID interface has an erroneous string ID 6 (according to lsusb).

However, oddly, the string "WCH CMSIS-DAP" appears in the 'path' of the hidapi device info dictionary, associated with interface 2 (the HID interface). This doesn't add up… But it does present an option for detecting CMSIS-DAPv1 devices that only have "CMSIS-DAP" in the interface string when using hidapi.

I'll make a change to look for "CMSIS-DAP" in the hidapi device path, and give you a branch to try it out with.

flit · 2021-03-20T21:24:35Z

Ok, the change is ready for testing on this branch of my fork.

You can install like this:

$ pip install -U git+https://github.com/flit/pyOCD@bugfix/hidapi_uid_and_if_name

kaidegit · 2021-03-21T02:12:10Z

OK, It can find my wch link now.

Thanks!

flit · 2021-03-21T15:32:38Z

Great! Thanks for testing.

HonestQiao · 2022-05-19T00:22:26Z

I have the same problem.

My macOS is 11.6.4 (20G417).
After I connected CH32V307VCt6 to my MacbookPro(2015) by builtin WCH-LINK, I can see a WCH-Link device in SystemInfomation / USB.
I can connect to it with Serial Tool, and get the output.

$ lsusb -vv -d 1a86:8011
        WCH-Link:

          Product ID: 0x8010
          Vendor ID: 0x1a86
          Version: 2.03
          Serial Number: 0001A0000001
          Speed: Up to 12 Mb/s
          Manufacturer: wch.cn
          Location ID: 0x14100000 / 26
          Current Available (mA): 500
          Current Required (mA): 100
          Extra Operating Current (mA): 0

$ system_profiler SPUSBDataType
        WCH-Link:

          Product ID: 0x8010
          Vendor ID: 0x1a86
          Version: 2.03
          Serial Number: 0001A0000001
          Speed: Up to 12 Mb/s
          Manufacturer: wch.cn
          Location ID: 0x14100000 / 26
          Current Available (mA): 500
          Current Required (mA): 100
          Extra Operating Current (mA): 0

$ ls -lh /dev/cu.*
/dev/cu.usbmodem0001A00000012

$ python -V
Python 3.8.5

$ python -c "import pprint, hid ; pprint.pprint(hid.enumerate())"
no info about WCH-LINK
all output are for ['product_string': 'Keyboard Backlight'] or ['product_string': 'Apple Internal Keyboard / Trackpad']

$ python3 -mpip install --pre -U git+https://github.com/pyocd/pyOCD.git@develop
install ok

$ pyocd -V
0.33.1.dev35

$ pyocd list -vv
No available debug probes are connected

eugene-bright · 2022-12-04T20:50:17Z

It's actual for me again currently (pyocd 0.34.3)
The problem is reproducible with both 1a86:8010 (wch-LinkE-R0-1v2) and 2a86:8011
I don't have 1a86:8011 for testing

eugene-bright · 2022-12-05T10:10:44Z

More info on wch-LinkE-R0-1v2
https://www.wch.cn/products/WCH-Link.html?spm=a2g0o.detail.1000023.14.56d72adcTTkc7f

eugene-bright · 2022-12-05T10:18:54Z

It doesn't look to be based on DAP-Link, the following command does nothing

openocd -f interface/cmsis-dap.cfg -f target/stm32g0x.cfg -c "cmsis_dap_vid_pid 0x1a86 0x8010"

Here is a modified version of openocd that can provide a hint
https://nc-pin.com/index.php/2022/04/25/openocd-for-ch32v-series/

elfmimi · 2022-12-05T13:10:54Z

@eugene-bright 1a86:8010 means it is in RISC-V mode. Re-check its recognized product name. You should see WCH-LinkRV .

eugene-bright · 2022-12-05T16:18:32Z

The docs are in Chinese only. I clicked IAP button and now I can't go out of IAP mode :hide-the-pain:
One more peace of data I found
https://www.wch.cn/bbs/thread-71088-1.html

kaidegit · 2022-12-05T16:37:22Z

The docs are in Chinese only. I clicked IAP button and now I can't go out of IAP mode :hide-the-pain:

One more peace of data I found

https://www.wch.cn/bbs/thread-71088-1.html

it should be work after replug it。。。do you flash the ch549's firmware？ it should be flashed the firmware marked ch32v307。

btw，the chip has no boot0 to go to chip's bootloader. So if the iap part is broken, it is a must to have an another wch link or linke to flash it.

eugene-bright · 2022-12-05T16:47:37Z

@kaidegit Thank you very much for the input!
I did not flash anything. But apparantly I'm now forced to do so because replugging doesn't make the change and the dongle appears as WinChipHead 4348:55e0 all the time.
I'm new to this stuff and touching it in the spare time. The goal is to adopt WCH-LinkE and start learning CH32V003 MCU. It's very promising.

kaidegit · 2022-12-05T16:56:31Z

Pyocd may can only work with arm mcu. And the debugger port of v003 is not open sourced. So just use the openocd wch offered to debug v003.

eugene-bright · 2022-12-05T16:58:06Z

👌

flit added bug probe/cmsis-dap labels Mar 20, 2021

flit mentioned this issue Mar 21, 2021

CMSIS-DAP backend synthetic UID and device detection #1122

Merged

flit closed this as completed in #1122 Mar 21, 2021

alexxy mentioned this issue Feb 3, 2022

Suppor for WCH-Link - CMSIS-DAP V2 probe probe-rs/probe-rs#995

Open

eugene-bright mentioned this issue May 25, 2022

Probe wch.cn WCH-Link (2a86:8011) support #1395

Closed

flit mentioned this issue May 30, 2022

Accept WCH-Link as DAPv1 #1399

Merged

gicking mentioned this issue Mar 7, 2023

Linux upload/debug fails Community-PIO-CH32V/platform-ch32v#22

Closed

wangwang105 mentioned this issue Jul 24, 2023

cannot find my WCH-Link #1596

Open

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cannot find my WCH-Link #1121

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cannot find my WCH-Link #1121

cannot find my WCH-Link #1121

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