USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Kubek — Sun, 17 Oct 2021 19:30:37 GMT

Well, I solved the issue myself. There was a problem with such many things. I brainstormed myself for half a day and solved the issue. Thanks for yoiur good wish anyway!

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Øivind — Fri, 15 Oct 2021 12:25:47 GMT

Ok, yes I am able to reproduce that. Doesn't seem to have anything to do with debug vs release. Moving app_usbd_power_events_enable() to be after all the init functions, like it is in usbd_ble_uart, makes the COM port show up in release, but doesn't fix the underlying issue of nrf_sdh_enable_request() failing due to an invalid state.

There is a lot going on here, almost like you are trying to merge the examples in one go. That's bound to cause headaches. I would start over with one of the examples, slowly integrate functions from the other example, and identify and fix issues along the way. Then you can easily point to a single, smaller change which causes issues.

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Kubek — Fri, 15 Oct 2021 09:21:25 GMT

I guess we misunderstood. The COM you opened is the J-Link one and it works pretty fine. But you need to attach yet another USB cable to a USB nRF, next to Reset button. It should appear as other COM port that crashes for me.

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Øivind — Fri, 15 Oct 2021 08:58:00 GMT

I am not able to reproduce the issue. In release, the COM port appears, the restart button works and I get terminal output on the COM port:

BLE UART central example started.
-1090482353
f_addr = 1284
&f_addr = 537133000
p_addr = 1284
*p_addr = -1090482353
&p_addr = 537133016
1 = 1

You can try a few things, like an erase all on the board, cleaning the build in SEGGER, updating to the latest nrf command line tools, or moving the project to a fresh SDK install.

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Kubek — Thu, 14 Oct 2021 17:26:18 GMT

Sure, I'ts attached in the link below:

Turbo J I'm not sure how to write into registers, as you suggest.

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Øivind — Thu, 14 Oct 2021 11:46:22 GMT

Hi,

can you zip and attach the project folder, so I can try building it on my end?

RE: USB CDC doesn't appear as COM in Release. It's visible only in Debug mode.

Turbo J — Mon, 11 Oct 2021 17:38:23 GMT

You need to force an USB reset or disconnect event on device (re-)start.

Simplest solution is to put the USBPULLUP register into "pullup is disconnected" state and then wait about a second.The pulldown resistor in the USB hub pulls the datalines low, forcing a disconnect on the host.

After that, resume normal operation like app_usbd_init().