12f675_fuse_about_to_blow!

[LEDave]

I've been doing lots of reading and slowly trying to work my way through the TX / RX progs to get an understanding of what's actually happening, the sequence etc. One thing I can't see though is this.

In the TX program we've got:

SEROUT2 D_OUT,BAUD,[PreAmble,Synch,DAT_OUT,DAT_OUT,CHK_SUM]

And the RX has:

SERIN2 D_IN,N2400,[WAIT(Synch),DAT_IN1,DAT_IN2,CHK_SUM]

So my Q is this: What's happened to the 'PreAmble BYTE' ?

PreAmble CON $A5    ' 10100101 preamble

The Manual says:

The list of data items to be received may be preceded by one or more qualifiers between parenthesis after WAIT. SERIN2 must receive these bytes in exact order before receiving the data items. If any byte received does not match the next byte in the qualifier sequence, the qualification process starts over

So in this case that would be the Synch BYTE right? Synch BYTE always first (because of the WAIT command), the rest to follow. I can't see where / how the preAmble arrives though.

Also this from WIKI:

http://en.wikipedia.org/wiki/Syncword

Suggest to me that a PreAmble and a Synch are two ways of doing the say thing, or very similar, have a got that on right?

Dave