As far as I can see, USB is an Data link layer added on top of a physical serial line, to which it is electrically identical.
Once installed and plugged in, the board would then appear as a COM interface?
Quote:As far as I can see, USB is an Data link layer added on top of a physical serial line, to which it is electrically identical.Nope, sorry. Not even close. RS232 is a single ended serial communications mechanism with practically nothing in terms of data link. USB is a huge monolith including the electrical specification (which is seriously different than RS232, differential signaling for starters), data link, protocol, and lots and lots of other specifications and requirements.
Ah, I thought RS232 was the whole specification (including electrical and signalling specifications).
I have to wonder if the USB/232 adapter is bad or incorrectly identified (i.e. it's not really an FTDI chipset).My best suggestion at this point is to try to find another computer or another USB/232 device to substitute and see if it makes a difference. If Windows offers to search for a driver, let it - who knows, it could work. |:
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