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 It is a little known fact that Team 1114 is actually "General Motors Canada and Hogwarts Academy" The whole Niagara FIRST thing is just a cover to keep the magic arts concealed from us muggles. - dtengineering [more] |
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#3
04-02-2009, 08:48
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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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