Can the EMX usb ports be used as digital input/output lines (from the usb connector)…it would be handy for some reasons when the board is already sealed up in a case. If it can be used, can the connector also be switched back to be used as normal usb host?
I was looking for schematics to see how the emx usb ports are implemented (direct from the processor?), but couldn’t find the schematics.
@ Hoyt -
but couldn’t find the schematics.
See (resources tab)
Thanks, but I still don’t find the [em]schematic[/em]…need that to see if the lines run right from the cpu to the connector in some manner.
I did find some usb i/o modules that just plug in…might work, but maybe not as speedy as direct i/o manipulation from the cpu. How fasrt could you control i/o with one of these modules? ms? us? ns?
ARE the usb pins connected to the processor & usable directly as high-speed I/O?..without the schematic, I can’t tell.
You could use the “EMX reference design” of the Cobra to see that. http://www.ghielectronics.com/catalog/product/131
But you’ll NEVER get a schematic of the EMX module itself. That’s GHI intellectual property and they’re not likely to publish that.