Quote:
Originally Posted by Abwehr
I think the number "9" came from the number of pins on a standard DE9 RS-232 connector.
You will need one of these: http://en.wikipedia.org/wiki/MAX232
So you would only need a maximum of 4 signal lines between the MAX232 chip and the GPIO pins - Rx, Tx, RTS, CTS. RTS and CTS are optional (you probably won't need them for PC communication). This is in addition to +5V and GND needed by the MAX232. |
That mostly answers my question, but how do I wire the digital io board to the 4 signal lines from from the DE9 (via the max232)? Just leave the other two?
Thanks for the tip about the max232, I think I would have embarrassed myself without that.
-jonathan