[sdiy] Keyboard with PIC microcontroller

[kernel255.mailinglis]

Hi all,
I have developed a small circuit to read keys of a keyboard with a PIC microcontroller. I have already developed the hardware, but I have some problem in developing the software with Assembler. I checked the PIC's CPU instructions and I haven't found any instruction to do indirect addressing or indexed addressing; I explain it by a simple C example:

#define BufferSize 5

char buffer[BufferSize],data,i;
char *bufferPtr = buffer;

for(i=0;i<BufferSize;i++)
{
    data = *(bufferPtr+i);
    /* ... do something on data ... */
}

What I'm not able to do with PIC Assembler is to have a pointer to memory, increment it, and read or write the memory location pointed by it. I searched for a special register to do stuff like these (as append for other CPUs) but I haven't found it.

Thank you.
Stefano



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