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FBL · 2024-12-13

Introduction VCONN is a dedicated power supply pin in the USB Type-C® connector. It provides power to the cables electronics, such as e-markers (EMC), long cables with data repeaters, and VCONN-powered USB devices. It ensures proper power supply ...

FBL · 2024-12-09

Introduction The USB Type-C® and USB PD specifications revolutionized device connectivity by merging data transfer and power delivery for up to 240 W (with EPR in USB PD 3.1). A key feature, fast role swap (FRS), allows a power supplying device quic...

FBL · 2024-10-29

While the STLINK-V3 is compliant with USB 2.0 and exhibits reliable USB performance across various platforms since several years, the USB communication may fail between an STLINK-V3 and some recent computers. 1. Root cause The root cause comes from...

FBL · 2024-10-23

Introduction The article provides a comprehensive guide on selecting suitable endpoints for USB applications using STM32 microcontrollers. This involves understanding the types of data transfers required by the application and determining suitable en...

FBL · 2024-10-10

Introduction There are different ways to supply the USB transceivers on STM32H7 products, depending on VDD33USB and VDD50USB availability. 1. VDD33USB pin configuration According to STM32H7 datasheets, when USB is not used, the VDD33USB pin should...

FBL · 2024-12-14

Hi @unsigned_char_array Thanks for reporting the issue! Would you share an example project to reproduce on my end?

FBL · 2024-12-13

Would you share your IOC file?

FBL · 2024-12-13

Hi @AgoDream Did you check the definition of your PDO in usbpd_pdo_defs.h and in your usbpd_dpm_conf.h

FBL · 2024-12-13

Hi @robertkau You can check this article using composite dual CDC HID device How to implement the USB device composite class in... - STMicroelectronics Community. You may simply need to redefine MSC class instead of HID class.

FBL · 2024-12-12

Hi again @Sara02 I meant you use different UART instance apart from the one connected to the sensor to check if the enumeration is working. Otherwise, you can use USB sniffer. Can you share schematics of your custom PCB?

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Understanding VCONN in STM32 and TCPP USB Type-C® port protection

How to manage fast role swap (FRS) in an STM32

FAQ: Possible communication failure between STLINK-V3 and some recent computers

How to select suitable endpoints for your STM32 USB application

FAQ: Configuring the VDD50USB and VDD33USB pins on STM32H7 when not using USB

Re: Hard Fault in USBH_MSC_RdWrProcess() and USBH_MSC_GetLUNInfo()

Re: Implementing FRS on G474

Re: Implementing FRS on G474

Re: USBX - Composite USB device - CDC ACM and MSC

Re: STM32H5 USB HOST CDC not able to receive messages