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is there any note and source for how to implement SPI or synchronious serial communication on any pin of a microcontroller. and is it possible and diffcult to do it? pls help!
Here are a few web sites that did a good job of explaining SPI. You should be able to grab the data book and get bit-banging working pretty quickly. However, it won't be all that fast. SPI Introduction: http://www.embedded.com/story/OEG20020124S0116 Serial Busses Page: http://www.epanorama.net/links/serialbus.html Jon