Host USB serial CDC #459

aniplay62 · 2024-07-03T11:20:38Z

aniplay62
Jul 3, 2024

Hi,
If FTDI cable works fine, I tried today CDC with the PI debug probe, but I get a not supported descriptor. I see only a bulk support inside the sources, but the device returns only bmAttributes & 0x3F to 3 and bEndpointAddress to 0x81. I have put a test with bit 0 mask like midi ((bmAttributes & 0x3E) == 0x02) and removed test with (m_pEndpointOut == 0), now I see the device.. but I'am not the best people for continue this job. There are some plans for support more devices ?

rsta2 · 2024-07-03T15:52:02Z

rsta2
Jul 3, 2024
Maintainer

My debugprobe device is detected successfully as a serial CDC device here. Do you have a recent debugprobe firmware installed? I haven't tested the data transfer, but it is definitively detected. This is the descriptor dump using lsusb -v for the device:

Bus 001 Device 003: ID 2e8a:000c Raspberry Pi Debug Probe (CMSIS-DAP)
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.10
  bDeviceClass            0 
  bDeviceSubClass         0 
  bDeviceProtocol         0 
  bMaxPacketSize0        64
  idVendor           0x2e8a 
  idProduct          0x000c 
  bcdDevice            1.03
  iManufacturer           1 Raspberry Pi
  iProduct                2 Debug Probe (CMSIS-DAP)
  iSerial                 3 ???
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x0062
    bNumInterfaces          3
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0x80
      (Bus Powered)
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       255 Vendor Specific Class
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              5 CMSIS-DAP v2 Interface
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x04  EP 4 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     0x85  EP 5 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               0
    Interface Association:
      bLength                 8
      bDescriptorType        11
      bFirstInterface         1
      bInterfaceCount         2
      bFunctionClass          2 Communications
      bFunctionSubClass       2 Abstract (modem)
      bFunctionProtocol       0 
      iFunction               0 
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           1
      bInterfaceClass         2 Communications
      bInterfaceSubClass      2 Abstract (modem)
      bInterfaceProtocol      0 
      iInterface              6 CDC-ACM UART Interface
      CDC Header:
        bcdCDC               1.20
      CDC Call Management:
        bmCapabilities       0x00
        bDataInterface          2
      CDC ACM:
        bmCapabilities       0x02
          line coding and serial state
      CDC Union:
        bMasterInterface        1
        bSlaveInterface         2 
      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              16
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        2
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass        10 CDC Data
      bInterfaceSubClass      0 
      bInterfaceProtocol      0 
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 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

As you can see, there are bulk EPs in the CDC data interface (10-0-0).

1 reply

aniplay62 Jul 4, 2024
Author

I updated the Pi Debug Probe without success, lsusb -v :

Bus 003 Device 005: ID 2e8a:000c Raspberry Pi Debug Probe (CMSIS-DAP)
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.10
bDeviceClass 0
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x2e8a
idProduct 0x000c
bcdDevice 2.01
iManufacturer 1 Raspberry Pi
iProduct 2 Debug Probe (CMSIS-DAP)
iSerial 3 E661640843793027
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 0x0062
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 100mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 5
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x04 EP 4 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 0x85 EP 5 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0040 1x 64 bytes
bInterval 0
Interface Association:
bLength 8
bDescriptorType 11
bFirstInterface 1
bInterfaceCount 2
bFunctionClass 2 Communications
bFunctionSubClass 2 Abstract (modem)
bFunctionProtocol 0
iFunction 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 1
bInterfaceClass 2 Communications
bInterfaceSubClass 2 Abstract (modem)
bInterfaceProtocol 0
iInterface 6
CDC Header:
bcdCDC 1.20
CDC Call Management:
bmCapabilities 0x00
bDataInterface 2
CDC ACM:
bmCapabilities 0x06
sends break
line coding and serial state
CDC Union:
bMasterInterface 1
bSlaveInterface 2
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 16
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 2
bInterfaceClass 10 CDC Data
bInterfaceSubClass 0
bInterfaceProtocol 0
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x02 EP 2 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

I removed this lines inside GetDescriptor():
if ( ucType == DESCRIPTOR_ENDPOINT
&& ucDescType == DESCRIPTOR_INTERFACE)
{
break;
}

Now I see the 2 x Bulk EP descriptors, connected tx to rx, but Tx not works:

usbdev0-1: Device ven1a40-101, dev9-0-1 found
usbdev0-1: Interface int9-0-0 found
usbdev: Using device/interface int9-0-0
usbdev1-1: Device ven518-1 found
usbdev1-1: Interface int3-1-1 found
usbdev: Using device/interface int3-1-1
usbdev1-1: Interface int3-1-2 found
usbdev: Using device/interface int3-1-2
usbdev1-2: Device ven2e8a-c found
[WARNING] usbdev1-2: Function is not supported
usbdev1-2: Interface int2-2-0 found
usbdev: Using device/interface int2-2-0
[WARNING] umouse: Mouse report size < 3
[DEBUG] usbhub: Port 1: Device configured
GetDescriptor ucDescLen 5, ucDescType 36, ucType 5, 05 24 00 20 01
GetDescriptor ucDescLen 5, ucDescType 36, ucType 5, 05 24 01 00 02
GetDescriptor ucDescLen 4, ucDescType 36, ucType 5, 04 24 02 06
GetDescriptor ucDescLen 5, ucDescType 36, ucType 5, 05 24 06 01 02
GetDescriptor ucDescLen 7, ucDescType 5, ucType 5, 07 05 81 03 40 00 10
GetDescriptor ucDescLen 9, ucDescType 4, ucType 5, 09 04 02 00 02 0a 00 00 00
GetDescriptor ucDescLen 7, ucDescType 5, ucType 5, 07 05 02 02 40 00 00
GetDescriptor ucDescLen 7, ucDescType 5, ucType 5, 07 05 83 02 40 00 00
[DEBUG] cdc: Baud rate 9600
[DEBUG] usbhub: Port 2: Device configured
[DEBUG] xhciroot: Port 1: Device configured

Serial test
[DEBUG] cdc: Baud rate 115200

[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed
[DEBUG] xhciep: Transfer timed out
[WARNING] userial: USB write failed

rsta2 · 2024-07-04T12:16:43Z

rsta2
Jul 4, 2024
Maintainer

I've found a problem and fixed it on the develop branch. How it seems, the Debug Probe UART requires to explicitly enable RTS and DTR to allow data transfers. With this fix the Debug Probe UART is detected and transfers data without problems here with the Circle driver. Thanks for pointing me on this!

I have no explanation for the error messages, you get, and why you have to modify GetDescriptor(). If I remember well, you have embedded the Circle USB code into your own system. I can only say, that it works with the native Circle develop branch.

7 replies

aniplay62 Jul 4, 2024
Author

This function is USBFunctionSelectInterfaceByClass() inside USPi, and I call this function :

usbserialcdc.txt

And I not see the first interface with EP4 and EP5 :

GetDescriptor ucDescLen 5, ucDescType 36, ucType 5, 05 24 00 20 01
GetDescriptor ucDescLen 5, ucDescType 36, ucType 5, 05 24 01 00 02
GetDescriptor ucDescLen 4, ucDescType 36, ucType 5, 04 24 02 06
GetDescriptor ucDescLen 5, ucDescType 36, ucType 5, 05 24 06 01 02
GetDescriptor ucDescLen 7, ucDescType 5, ucType 5, 07 05 81 03 40 00 10
GetDescriptor ucDescLen 9, ucDescType 4, ucType 5, 09 04 02 00 02 0a 00 00 00
GetDescriptor ucDescLen 7, ucDescType 5, ucType 5, 07 05 02 02 40 00 00
GetDescriptor ucDescLen 7, ucDescType 5, ucType 5, 07 05 83 02 40 00 00

With the test not removed, GetDescriptor() stops with the bold line and the 2 bulk EP are not found.

rsta2 Jul 4, 2024
Maintainer

Finally, this is your own extension of USPi. USPi support is available in the USPi project, but of course only for functions, which are supported by the project itself.

aniplay62 Jul 5, 2024
Author

Sure i's not easy to update USPI from Circle updates ;-)
Not sure if the function USBFunctionSelectInterfaceByClass() is in the right place, but finally I fixed the problem by a call of USBConfigurationParserCopy() after USBFunctionSelectInterfaceByClass().

rsta2 Jul 5, 2024
Maintainer

Good, that you have found a solution.

aniplay62 Jul 5, 2024
Author

Thanks for your help

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Host USB serial CDC #459

aniplay62 Jul 3, 2024

Replies: 2 comments · 8 replies

rsta2 Jul 3, 2024 Maintainer

aniplay62 Jul 4, 2024 Author

rsta2 Jul 4, 2024 Maintainer

aniplay62 Jul 4, 2024 Author

rsta2 Jul 4, 2024 Maintainer

aniplay62 Jul 5, 2024 Author

rsta2 Jul 5, 2024 Maintainer

aniplay62 Jul 5, 2024 Author

aniplay62
Jul 3, 2024

Replies: 2 comments 8 replies

rsta2
Jul 3, 2024
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aniplay62 Jul 4, 2024
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rsta2
Jul 4, 2024
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aniplay62 Jul 4, 2024
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rsta2 Jul 4, 2024
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aniplay62 Jul 5, 2024
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rsta2 Jul 5, 2024
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aniplay62 Jul 5, 2024
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