HardFault after several hours with CDC USB_HOST_M7, USB_OTG_HS

[roblahnst]

Product: RIVERDI RVT70HSSNWC00-B with STM32H757XIH6

STM32Cube FW_H7 V1.11.1
TouchGFX 4.25.0
CubeIDE 1.16.1
FreeRTOS 10.3.1, CMSIS_V2

I am using the code attached in usb_host.c to read data from a USB Virtual COM barcode reader. The .ioc file is also attached.

The code runs fine, however after some hours I get a hard fault. This happens only when the USB-scanner is plugged in. If nothing is plugged to USB it runs fine. I don't do anything with the barcode reader - it is just plugged in and the hard fault occurs.

I already tried the following:

• USBH_CDC_BUFFER_SIZE 1024 to 2048
• #define USBH_PROCESS_PRIO osPriorityLow to osPriorityNormal
• #define USBH_PROCESS_STACK_SIZE ((uint16_t)4*2048) between 512 and 8192
• STM32Cube FW_H7 V1.11.2

Any help would be very much appreciated.

[roblahnst]

No, USB CDC is not used with LwIP. That's the funny thing. There is no connection between USB and LwIP.

[Guillaume K]

So what physical network interface is used with LwIP ? is it ethernet ?

Initially I thought that the Riverdi product you mention ( RVT70HSSNWC00 ) was just an LCD screen. But in fact it is an entire board. But I don't see reference to ethernet in the product page .

[roblahnst]

Yes, it is Ethernet. The Board has an optional PoE Add-on => https://riverdi.com/product/stm32h7-poe-add-on

[Guillaume K]

I'm interested to see the source code of the LwIP and ethernet part for the RVT70HSSNWC00 and the PoE add-on. Does it come from Riverdi or is it a custom development ? Is it publicly available ? I didn't find sources on Riverdi site nor their github account.