a portable gold wafer car reader / writer

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iman_andeh

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hi all

i need some help here

i'm building my own portable gold wafer card reader / writerr using PIC16F877A.
i don't understand how to communicate the PIC16F877A with gold wafer card.

i know that gold wafer card is a built-in PIC16F84+24LC16.

We have to use the RB6 and RB7 to communicate gold wafer card with another device. And i know that gold wafer card must be generated with clock 3.57Mhz.

one thing that i dont understand is,
how to communicate PIC16F877A with the gold wafer card.

I hope anyone can tell me the theory and give me an example source code...

thank you b4..
 


Greeting$

That i$$ue take$ a lot of time man... may be we can help you but if the time doesn't matters

Good Luck!
 

This was a route down memory lane
Gold card is nothing special, just a PIC 16F84 and a serial memory chip.
You need to down-load information on how to do a serial programming of the 16F84. You will see that only the pins conected to the pads are used.
To program the 24LC16 chip you have to first load a special program into the 16F84 which can communicate with the memory chip. When you have loaded the memory, you then burn the application into the 16F84. This two-stage operation was called through pic programming. Search the net for d2mac you will find detailed information on the process. It will not be simple to convert the Dos or windows program into pic 16F877 code

Good Luck
 

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