Thomas Fleckenstein wrote:
>
> My application:
>
> A PIC16C84 receives serial data from a data acquisition board in a 5 minute
> interval. These data need to be buffered for security reasons. I would like to
> connect a 8k serial EEPROM via IIC bus to the PIC as a buffer. This buffer
> should work like a ringbuffer. It should fill the memory incrementaly and when
> the whole memory chip is full, it should start writing over the data in the
> first memory address.
> I have not much experience with the PIC. Can somebody give me some ideas how
 to
> do this or can send me a code example.
> I would need: The IIC routine, the routine for the ringbuffer ( read and write
> )and a RS232 routine to connect a remote pc.
>
> Thanks in advance for your help.
> Best Regards,
> Thomas

Just a thought......   I would not use an E2prom as a buffer, as it has
limited erase/write endurance, and will eventually fail.  The life would
depend on your data-rate, but 100K to 1M cycles is typical.  SRAM could
be used instead.

jim