On 2/3/06, Alan B. Pearce <A.B.Pearce@rl.ac.uk> wrote:
> >I'm not sure I get this yet... What's wrong with
> >using the modem pins of a serial port? Or is this
> >what you are thinking of using?
>
> That is exactly what he is wishing to do, but part of the discussion has
> revolved around how timings are unreliable when using USB-Serial interfaces.
>
> Personally I suspect the most reliable way to do it would be a USB-Printer
> port set up as a basic text only printer, and then fed repeated characters
> with one bit of the ASCII character being the clock, and one bit the serial
> data. Still does not give the feedback path, and would probably need three
> characters to clock one bit into the chip. Also if you streamed the data out
> the port, the chip may FIFO buffer it, and stream it into the chip too fast
> for it to write to the Flash.

Alan, what makes you think the USB/parallel is working different than
USB/serial conversion ? The frames for sending a command word from USB
to the USB transciever takes the same (too long) time.
You have no timing control between ASCII caracters sent.

Vasile
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