USB CDC USBD_CDC_SetTXBuffer and USBD_CDC_Transmit_Packet

[ECrom.1]

Hi all,

I am trying the example of USB CDC in:

https://www.youtube.com/watch?v=rLnQ3W8gmjY&list=PLnMKNibPkDnEEvQWrDqVuu1w_iQ214GXi&index=35

It uses the above functions.

But when I compile, I get :

undefined reference to `USBD_CDC_SetTXBuffer' and to  USBD_CDC_Transmit_Packet

Can someone help ?

Thanks

Eli

[Bob S · Accepted solution]

Is this a COMPILE error, or a LINKER error?

Didn't look at the video, but presuming you started with CubeMX (or the IDE embedded version of this), those functions usually reside in usbd_cdc.h and usbd_cdc.c, located in

YOUR_PROJECT_DIR\Middlewares\ST\STM32_USB_Device_Library\CDC\Inc and \Src

If those files exist in your project directory, perhaps the IDE is not configured to look in those directories for files. Presuming you are using an Eclipse-based IDE, rIght-click on the project in the "Project Explorer" window, expand "C/C++ Build" and click on "Settings". In the "Tool Settings" tab, click on "Includes" under "MCU GCC Compiler". You should see a list of directories that the compiler searches for .h files. Make sure the above directory is listed.

[ECrom.1]

Hi and thanks for the reply

It is a compile error

And I am working with STM CUBE

Eli

[ECrom.1]

found the problem. Thanks

The compiler did not include the USB include file for some reason, although it is in the tree

I included it manually, and works fne

Thanks again

Eli

[ARodr.2]

Eli,

How did you include it manually?

I'm having the same issue.

please provide more details.

thanks in advance

[ARodr.2]

Eli,

How did you include it manually?

I'm having the same issue.

please provide more details.

thanks in advance