How to use USB CDC transfer API in zephyr

RE: How to use USB CDC transfer API in zephyr

Edvin — Mon, 25 Jan 2021 15:12:24 GMT

[quote user="sudharsan"]Are you suggesting me to use Termite?[/quote]

No, just saying that perhaps the DTR is the part that is blocking you. I don't know whether this is an option, or whether it is enabled by default in Terraterm. That is for you to research.

[quote user="sudharsan"]No need of UART configuration right?...In my custom board UART hardware provision is not available.[/quote]

No need. The UART is only for logging.

Perhaps you can try to use Putty? You need to set up these putty settings. Remember to apply both the settings from the section "Terminal settings" and the section "UART and USB settings".

In addition, add the setting:

Then, if you see the text that you type into Putty, it means they are echoed back. If it doesn't work, it will not be possible to type anything to the Putty window.

Best regards,

Edvin

RE: How to use USB CDC transfer API in zephyr

sudharsan — Mon, 25 Jan 2021 10:13:43 GMT

[quote userid="26071" url="~/f/nordic-q-a/70637/how-to-use-usb-cdc-transfer-api-in-zephyr/290501#290501"]That is the name of the project, but I tested it, and it doesn't react to my UART. The UART is only used for logging. I don't know why the sample is called that. This sample is from Zephyr, and not NCS (the Nordic part of Zephyr), so I can't say why they decided to call it what they did.[/quote]

No need of UART configuration right?...In my custom board UART hardware provision is not available.

Regards

Sudharsan

RE: How to use USB CDC transfer API in zephyr

sudharsan — Mon, 25 Jan 2021 10:08:20 GMT

I am using Tera term to connect USB port and get the debug data.

Are you suggesting me to use Termite?

Regards

Sudharsan

RE: How to use USB CDC transfer API in zephyr

Edvin — Mon, 25 Jan 2021 10:03:37 GMT

Have you tried to enable DTR?

I don't know what terminal you are using, but I am using Termite:

BR,
Edvin

RE: How to use USB CDC transfer API in zephyr

sudharsan — Fri, 22 Jan 2021 12:08:23 GMT

Yes it built...I have connected as usb power has been detected...but no data seen on serial monitor.

Thanks

Sudharsan

RE: How to use USB CDC transfer API in zephyr

sudharsan — Fri, 22 Jan 2021 11:57:15 GMT

sure Edvin. I will give it a try with NCS version 1.4.2 and let you know

Regards

Sudharsan

RE: How to use USB CDC transfer API in zephyr

Edvin — Fri, 22 Jan 2021 11:05:00 GMT

Ok, so I downloaded the v1.4.99 dev branch that you are using, and it fails in the same way as it did for you. Note that this is the developer branch. I tried building using the 1.4.2 version. Can you please try the same? It compiled without errors for me.

It looks like this is only a Segger Embedded Studio issue, as the issue was not present when I tried to build with the command line using "west" with the 1.4.99 dev-branch.

Best regards,

Edvin

RE: How to use USB CDC transfer API in zephyr

sudharsan — Fri, 22 Jan 2021 05:37:59 GMT

Hi Edvin,

I have attached the screenshot here. This is the path that I would select project using toolchain manager.

Project driver files like nrf_rtc.c, nrfx_i2c.c and all I just use proj.conf file to add these driver files.

Segger and other related packages has been installed in Volume:C of my PC

Anything else that you are looking for....Please let me know

Regards,

Sudharsan

RE: How to use USB CDC transfer API in zephyr

Edvin — Thu, 21 Jan 2021 14:03:30 GMT

I tested building and flashing using the command line:

west build -b nrf52833dk_nrf52833 -d _build_nrf52833
west flash -d _build_nrf52833

I did so because I didn't have Segger Embedded Studio Nordic edition installed on my home computer (home office because of Covid-19).

Can you please show me a screenshot of the menu where you set up the project in SES (the window where you select the project files, board files and so on).

Best regards,

Edvin

RE: How to use USB CDC transfer API in zephyr

sudharsan — Thu, 21 Jan 2021 13:09:18 GMT

could you please select nrf52833 in toolchain manager and build this project???

RE: How to use USB CDC transfer API in zephyr

sudharsan — Thu, 21 Jan 2021 13:07:33 GMT

It looks all the directories built completely.

This is an example project that I did not changed anything and I built it directly.

Finally log says the following

"combining zephyr/isr_tables.c"

unrecognized option'--output-source'

]<value>[<flags>] Add a symbol

<version>]

supported targets: elf32-littlearm elf32-littlearm-fdpic elf32-bigarm elf32-bigarm-fdpic elf32-little elf32-big srec symbolsrec verilog tekhex binary ihex plugin

Regards

Sudharsan

RE: How to use USB CDC transfer API in zephyr

Edvin — Thu, 21 Jan 2021 12:21:15 GMT

[quote user="sudharsan"]They had written USB-to-UART transfer right? In our custom board there is no UART pins.[/quote]

That is the name of the project, but I tested it, and it doesn't react to my UART. The UART is only used for logging. I don't know why the sample is called that. This sample is from Zephyr, and not NCS (the Nordic part of Zephyr), so I can't say why they decided to call it what they did.

[quote user="sudharsan"]It looks project build has been failed. Please look at the picture, down here.[/quote]

What does the compiler say when it fails to build? I can't tell from your screenshot. At least one of the builds should not have the "build completed" message. What does that one say? Is it missing anything?

RE: How to use USB CDC transfer API in zephyr

sudharsan — Thu, 21 Jan 2021 05:19:22 GMT

Hi Edvin,

I have used the same example for nrf52833 build. It looks project build has been failed. Please look at the picture, down here.

I have used the "NCS\zephyr\samples\subsys\usb\cdc_acm" driver in my project. It seems USB power has been detected.

They had written USB-to-UART transfer right? In our custom board there is no UART pins.

Earlier days I have developed my project with SDK17.0.2. In that, I was able to transfer via USB without UART config. The same I am expecting here to work with.

This is my Proj.conf file

CONFIG_STDOUT_CONSOLE=y
CONFIG_USB_DEVICE_STACK=y
CONFIG_USB_DRIVER_LOG_LEVEL_ERR=y
CONFIG_USB_DEVICE_LOG_LEVEL_ERR=y
CONFIG_NRFX_USBD=y
CONFIG_NRFX_POWER=y
CONFIG_USB_CDC_ACM=y
CONFIG_USB_DEVICE_PRODUCT="Zephyr CDC ACM sample"
CONFIG_USB=y

Please suggest your answers as soon as possible.

Regards

Sudharsan

RE: How to use USB CDC transfer API in zephyr

Edvin — Wed, 20 Jan 2021 11:03:44 GMT

Hello,

It looks correct. I suggest you check out the sample found in:

NCS\zephyr\samples\subsys\usb\cdc_acm.

This works as a loopback cdc_acm device. Test it with the USB peripheral on your custom board. Let me know whether it works or not.

Best regards,

Edvin