How to use USB OTG HS using ULPI protocol for accessing files from USB drive

Abin · ‎2023-08-03

Hai ,

At present I am working on STM32F205VET6 series for interfacing USB Flash drive. Here I need to access certain files from the memory. So I am using a connectivity USB OTG FS (ULPI) Dual Role. I searched the reference and library for this protocol to access my flash drive but I couldn't find any. I have few doubts on this.

1. Do I need to create separate modular file for accessing the Memory drive based on the ULPI timing diagram?

2. How can I Read . Write, Delete files from the flash memory. ?

3. Is there any Programming manual or coding examples are available?

Can anyone help me on this.

Piranha · ‎2023-08-04

https://electronics.stackexchange.com/questions/93670/difference-between-usb-and-ulpi

First you need an USB software stack and implement an MSC (mass storage class) device. Then you need a file system driver. I recommend TinyUSB and FatFS respectively. Such a task is not for beginners...

Abin · ‎2023-08-04

I already done this in my microcontroller,and verified. I used the FatFs file system for my SD card as well as USB with Host only mode, using file system drivers. My question is , whether the mentioned controller will support USB OTG HS -> Dual role ?

When I enable this the corresponding HAL file directory or Low Level directory is not generating.

FBL · ‎2024-01-22

Hello @Abin

You mean USB OTG HS -> Dual role in your first post?

Some recommendations are provided to use OTG_HS PHY through ULPI. Section 3.4 , ULPI is available to primary I/Os via multiplexing.

When I enable this the corresponding HAL file directory or Low Level directory is not generating.

Could you explain more?

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