STM32 HAL CDC example

Lukasz Przenioslo · ‎2015-11-25

Posted on November 25, 2015 at 13:25

Hello there,

I am trying to use usb device cdc protocol for my device. I have sucessfully generated code with CubeMX and the COM port is visible on my connected PC. The problem is, I cannot find any examples on how to send/ receive data using that virtual com port. I have searched in the examples but I think the only show usb-> serial adapter, the data is automatically forwarded to uart port. I was wondering how Can I receive data in interrupts, DMA and etc. I cannot find send/ receive functions in the code... I would really apreciate all help.

Amel NASRI · ‎2015-11-25

Posted on November 25, 2015 at 13:50

Hi Bremen,

You didn't tell us which part are you using.

For F4 devices, you find a CDC example under STM32Cube_FW_F4_V1.9.0\Projects\STM324xG_EVAL\Applications\USB_Device\CDC_Standalone.

Then you have the user manual (UM1734 for USB device and 1720 for USB Host) that may help you to use HAL functions in order to develop your application.

-Mayla-

To give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

Lukasz Przenioslo · ‎2015-11-25

Posted on November 25, 2015 at 13:58

I am suing STM32F407. I have seen the examples, but I cannot understand how to create a reception interrupt routine and how to send data over usb cdc device.

Edit: I found them. They are in usbd_cdc_if.c file if anyone needs them.