about stm32f2XX's usb-hs question!

luangzc · ‎2011-04-20

Posted on April 21, 2011 at 04:15

rrollet9 · ‎2011-05-17

Posted on May 17, 2011 at 14:32

According to the datasheet (doc. 15818 rev5) appendix A.4, no need to external PHY if you don't need OTG.

Nickname12657_O · ‎2011-05-17

Posted on May 17, 2011 at 14:32

Hi all,

External PHY is required with our STM32F2xx devices as far as the USB High-Speed mode is used either in device, Host or OTG configurations. There is a typo in our preliminary datasheet and should be fixed soon.

Cheers,

STOne-32.

rrollet9 · ‎2011-05-17

Posted on May 17, 2011 at 14:32

Hi

Thank you for this information. We would like to use the internal DMA of HS OTG in device mode. In the current user manual, there is no description about DMA usage in the programming model section for USB device (only slave mode is described). Does the CPU shall pop the packet status words from the Rx-Fifo each time the interrupt RXFLV is asserted as in slave mode? How the DMA indicates to the CPU the end of data transfer ? Does the DMA transfers only data or also packet status to the memory ? Last question: can the DMA transfer data to FSMC ?

Thank you for your help

Romain

luangzc · ‎2011-05-17

Posted on May 17, 2011 at 14:32

hi:

when the usb-library will come? thank you!

liangzc