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USB performance on STM32H7

rangam
Associate

Hi All,

This is related to performance on USB Host in FS mode. I have built custom board with STM32H743BIT6.Main interfaces on this are - USB FS Host, SD Card (SDeMMC interface used), LTDC, 16Mbyte SDRAM and Ethernet. All the interfaces are up and running except Ethernet. Need to debug further on this one as I could see that the phy communication itself didn't succeed.

I have created the project using cubeMX.USB is running on internal 48RCsystem is working at 400MHz sourced by external crystal oscillator 25MHz.

USB host mode + SD+LTDC+Fat FS + FREERTOS - is up an druning.

However the read performance measured on USB is at around 600kbits per second. SD performance after IP internal DMA enabled and running at 25Mhz I get close to 5.7MByytes per second.

Any possibility to improve the host performace ? I have tried enabling IP internal DMA still performance remained same.Can someone in this forum please help improve performance ?

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