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Anonymous
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Hello there.

   

I have a qustion about USB

   

I am seeing  the example code(cyfx3s_msc).

   

I don't under stand Why Check "USBS" in CyFxMscApplnDmaCb Function

   

Who make "USBS". Window Device Driver? DMA in Cypress?

   

Could you tell me answer?

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Anonymous
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 The MSC spec dictates this. See http://www.usb.org/developers/docs/devclass_docs/usbmassbulk_10.pdf Page 13. The driver is required to send 'USBC' in the CBW signature and we check for that in the DMA callback.

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