12f675_fuse_about_to_blow!

[LEDave]

Calculate checksum by adding 2 data bytes together

CheckSum = DAT_IN1 + DAT_IN2

So the CheckSum = (%10101011 * 2 BYTES) if SW1 ( GPIO.3) was pressed.

or (%10101101 * 2 BYTES) if SW2 (GPIO.4) was pressed.

Plus we should have the already have a calculated CHK_SUM that was sent.

So:

CHK_SUM   VAR BYTE  ' Holds checksum received

And:

CheckSum  VAR BYTE  ' Computed checksum of all bytes received

Therefore:

IF CheckSum != CHK_SUM THEN MAIN ' Failed checksum, return

If Checksum (!) is not = CHK_SUM then go back to MAIN the checksum has failed.

The same with:

IF (DAT_IN1) != (DAT_IN2) THEN MAIN ' Failed data comparison, return

The DAT_IN BYTES must also be equal, if not then back to MAIN:

If however everything matches then continue to MATCH..........

How does this look?

Dave