How to setup the Custom HID and CDC classes on the STM32H5 without using RTOS ?

[shashikumardh]

Hello ST team,

I am working on a POC for USB, in which I need to use two classes (Custom HID and CDC) both at a time. And for this I want to generate a code without using Azure RTOS. 

Can anyone help me out with this to get a sample code without RTOS and to use Custom HID and CDC both at a time.

Thanks in advance

[FBL]

Hi @shashikumardh 

Check this repo on GitHub for H5 products, you can find examples of HID class for USB without AzureRTOS 

[shashikumardh]

Hi FBL,

Thanks for the quick response. The repo which you shared is having only examples for one class. I need a reference example for usage of two classes at a time (custom hid + cdc) i.e composite examples.

please help me with this

[Mohamed_AYED]

https://github.com/STMicroelectronics/STM32CubeH7/tree/dev/usb/composite/Projects/STM32H743I-EVAL/Applications/USB_Device/Composite_CustomHID_CDC

[hardrock]

In my experience, this is easy and very excellent solution for STM32 USB Composite devices.

I-CUBE-USBD-Composite

https://github.com/alambe94/I-CUBE-USBD-Composite

[shashikumardh]

Hello Hardrock,

Thanks for the lead. Although I generated a code using AL94.I-CUBE-USBD-COMPOSITE.1.0.3.pack software package I am still facing some issue in device discovery. Attaching snapshot for the reference.

Kindly anyone help me to resolve this and please let me know will this AL94.I-CUBE-USBD-COMPOSITE.1.0.3.pack software package is compactible for H5 as well.

[hardrock]

1. You must install "STM32 Virtual COM Port Driver" for USB CDC in your PC.

https://www.st.com/en/development-tools/stsw-stm32102.html

2. For the USB Composite CDC and HID, you have to design the custom interface respectively.

/Middlewares/Third_Party/AL94_USB_Composite/COMPOSITE/App/

[USB CDC] usbd_cdc_acm_if.c
[USB HID] usbd_hid_custom_if.c

for example, CDC_Receive() in usbd_cdc_acm_if.c
this sample interface just echo back on same channel.

* USB COM RX Interface : CDC_Receive()
* USB COM TX Interface : CDC_Transmit()

static int8_t CDC_Receive(uint8_t cdc_ch, uint8_t *Buf, uint32_t *Len)
{
    /* USER CODE BEGIN 6 */
    //HAL_UART_Transmit_DMA(CDC_CH_To_UART_Handle(cdc_ch), Buf, *Len);
    CDC_Transmit(cdc_ch, Buf, *Len); // echo back on same channel

    USBD_CDC_SetRxBuffer(cdc_ch, &hUsbDevice, &Buf[0]);
    USBD_CDC_ReceivePacket(cdc_ch, &hUsbDevice);
    return (USBD_OK);
    /* USER CODE END 6 */
}