Wait for a string on a serial port

[sayzer]

Sayzer,

Sorry, i don't understand what I have done wrong with the OSC settings. I'm using an external 8MHz crystal; maybe I should have mentioned it.

I'll give Richard's suggestion (post #10) a try in a little moment and see what it does

Hi Roger,


I know you are using external 8Mhz crystal, that is why you need to tell the chip about it.
In your code, there is no OSC setting. You have it in fuse.
Default OSC setting is internal 4Mhz.

You need to manually choose the OSC value for external source by OSCCON.0 = 0
Otherwise, chip will not know you have selected external HS.

To make sure you are running on the correct speed, have a flip flop on a pin for say 5000ms.

FlipFlop:

TX_ON = TX_ON ^ 1
PAUSE 5000

Goto FlipFLop

Then, you can see the speed.