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I was wondering, would it be possible to create a better converter that did usb -> rs232/parallel port that had a special driver to put timing info? At least fo

I was wondering, would it be possible to create a better converter that did usb -> rs232/parallel port that had a special driver to put timing info? At least for driving CNC motors with a parallel port, timing is critical, you could send the pulse signal along with a timing, like 1 @ t0, 0 @ t0+1us etc.. Reading would be similar. The chip on the converter would have an accurate clock and faithfully reproduce the desired signal.

pjc50 11y ago
It could probably be done with isochronous mode (http://www.beyondlogic.org/usbnutshell/usb4.shtml#Isochronous http://www.beyondlogic.org/usbnutshell/usb4.shtml#Isochronou...), but realistically it's easiest to just delegate all the real-time stuff to a $1 microcontroller on the other end of the USB link.