I've asked several microcontroller manufacturers about "host mode" USB
support, specifically for the purpose of connecting the low-cost peripherals
that are becoming available.  the answer has been uniformly "it's hard", with
occasional elaborations into such areas as "well, a usb HOST-side controller
is supposed to support the FULL USB spec, which means 127 devices, going
through HUBs, and all that stuff..."

BillW

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