I am going to write the driver for ch341a SPI function. When I readed
the driver/usb/serial/ch341.c , I think that ch341 use vender usb
request and request type( non-standard usb request and request type) or
I may be wrong. But how does the writer of ch341.c knew those
infomation, I don't find those info from official pdf?
Thank you
P.S ch341 is a serial of chips including ch341a, ch341t, ch341h, ch341a
is full funtions but t and h aren't.
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Sorry, I am not familar with English, I speak chinese.
ayaka
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