Slow transfer rate USB-HS MSC

[jasonp4113]

Posted on July 17, 2015 at 00:46

Hi All,

I have created a project that hooks USB-HS MSC via the SDIO interface on the STM3240G devkit, I have used just the standard (unmodified) libraries. I am using cubemx v4.9.0 and F4 libraries v1.7.0The transfer rate seems extremely low at approx 180kB/s. I am using the USB2.0 interface on the kit. Nothing I do affects the transfer speed.Has anyone got any ideas why the xfer rate would be so low?CheersJason

[jasonp4113]

Posted on July 21, 2015 at 04:42

HI All

Maybe I could re-ask this question in a different way:What sort of bandwidth can you expect using USB-HS connection to PC when utilizing the USB-HS Device library hooked with the SDIO library? (So as to use a PC USB connection to read a SDIO card connected to the STM32 device in 4b mode)I can get approx 15MB/s-20MB/s over SDIO interface, but only 180kB/s when accessing the SDIO card over USB-HS to PC.Jason

[Walid FTITI_O]

Posted on May 19, 2016 at 13:58

Hi JasonP,

Refer to this [DEAD LINK /public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/Flat.aspx?RootFolder=/public/STe2ecommunities/mcu/Lists/cortex_mx_stm32/USB%20MSC%20device%20low%20transfer%20rate%20-%20STM32F7&FolderCTID=0x01200200770978C69A1141439FE559EB459D7580009C4E14902C3CDE46A77F0FFD06506F5B&currentviews=35]thread -Hannibal-