USB issue

RE: USB issue

ovrebekk — Wed, 10 Jun 2020 07:59:21 GMT

Hi JK

I am glad to hear you found a solution to the problem. I will close this case then.

Best regards
Torbjørn

RE: USB issue

jawadk — Tue, 09 Jun 2020 14:28:06 GMT

Hi,

Thanks for you reply

yea I managed to let it work.

I just switch controls the DTR output pin, on Hercules app -> Serial Mode I choose : Data.

And it worked.

RE: USB issue

ovrebekk — Tue, 09 Jun 2020 13:21:04 GMT

Sorry for the slow response, it has been a busy time lately, despite the Covid situation.

Are you still having issues getting communication to work?

If so please let me know if you have any updates to share, and I will set aside some time to look into this.

Best regards
Torbjørn

RE: USB issue

jawadk — Mon, 20 Apr 2020 07:28:12 GMT

Hi,

I managed to let it work, the nrf52840 communicate successfully with PC throw USB.

But I still have a problem.

The device works fine if I am using terminals: Docklight or puTTY.

The device not working with terminals: Hercules or YAT.

I am developing both sides the FW for the device and a PC SW App, and I am not managing to communicate with the board yet.

can you please suggest a COMPORT driver for my PC App ( the code responsible for initialize opening the COMPORT and to actually communicate) ?

and why it's not working whith Hercules or YAT Apps ?

RE: USB issue

ovrebekk — Thu, 16 Apr 2020 09:43:43 GMT

Hi JK

I showed your trace to our USB developer, but he claimed it was hard to get enough information from a terminal trace alone. Do you have a USB sniffer available so you can do a proper USB trace?

Have you been able to test this on Windows 10?

Best regards
Torbjørn

RE: USB issue

jawadk — Tue, 07 Apr 2020 11:52:52 GMT

Hi,

I used a Free Device Monitoring Studio to monitor the USB data and requests on the COM Port.

the Request view is attached.

It seems like the handshake not ending properly! I am not sure.

I just used the example from the SDK, can you tell what is wrong !?

devzone.nordicsemi.com/.../USB.txt

RE: USB issue

jawadk — Tue, 07 Apr 2020 10:12:15 GMT

Hi,

Thank you for your reply.

I am still using windows 7 and I managed to let the USB work with your usbd_ble_uart example, the data sent from the device received at PC, but I still have a problem to receive the data sent from PC to the device.

I set a Breakpoint on the beginning of the event handler ( cdc_acm_user_ev_handler) and it never triggers.

as I said:

[quote userid="76096" url="~/f/nordic-q-a/59675/usb-issue"]I saw an instruction to set the #define APP_USBD_CONFIG_EVENT_QUEUE_ENABLE to 0 and to delete the app_usbd_event_queue_process() function from the main loop and I did so, but this didn't help, the interrupt is not triggering.[/quote]

I am facing this problem with Nordic's dongle and another custom device based on nRF52840

please can you tell what the problem is !?

RE: USB issue

ovrebekk — Tue, 31 Mar 2020 09:10:58 GMT

Hi JK

Do you have a Win10 computer around that you can test with to see if the problem is related to the operating system?

All my PC's are updated to Win10, so I am not able to double check this on Win7 unfortunately.

Best regards
Torbjørn

RE: USB issue

jawadk — Mon, 30 Mar 2020 13:51:39 GMT

Hi Torbjørn,

Thank you for your reply.

My device shall communicate with PC throw USB or throw BLE USB dongle, that's why I chose this specific example.

I already modified this example where the cdc_acm_user_ev_handler and the nus_data_handler to not send the data over, instead to call some message parsing function of mine.

so I don't need a central to check the USB, I am setting a breakpoint in the begining of cdc_acm_user_ev_handler and it's not triggering when I send something from a serial port program from PC.

Best Regards

RE: USB issue

ovrebekk — Mon, 30 Mar 2020 13:06:01 GMT

The usbd_ble_uart example will not send anything until you send the newline character. Typically you have to enter ctrl + enter in your terminal program to send this.

Secondly, I believe you need to be connected to a BLE central device in order to see the data being sent.

[quote user=""]Besides what is the baud rate of the USB ? I didn't find where I can change the baud rate.[/quote]

The baudrate is not really relevant when using USB, since the USB interface has a much higher bandwidth than normal UART baudrates. This means it doesn't matter what baudrate you configure the CDC comport to on the Windows side.

Best regards
Torbjørn