Thread: bit banging on cRio?
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Unread 04-02-2009, 08:48
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Jared Russell Jared Russell is offline
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Re: bit banging on gpio?
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.

Here is a kit which comes with easy-to-assemble components to go from a serial cable to your microcontroller. And it costs all of $7.
Last edited by Jared Russell : 04-02-2009 at 08:50.
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