What you need to do for your self is to get intimately familiar with the 93C46 data sheet and the defined timing diagrams that show how to access the chip.

Then wrap a reasonable main program around this glob of uncommented code that bears every ear mark of code you downloaded off the web someplace.

Next study the code sequences carefully at the source code level and learn how they should implement what you have learned from the data sheet. If you see a mismatch you'll have to change the code appropriately.

Next verify that you have the part properly wired to the MCU and that you have proper Vdd, Gnd, and bypass cap on the parts.

Now it would be time to compile your test program and program it to the MCU.

Finally hook up an oscilloscope to verify that the MCU bit-banged waveforms look correct at the part.

Personally I feel that you need to complete all the above steps before you come here to ask questions. You should then be in a pretty good position to ask real questions about thing you do not understand.

Michael Karas