I am using an 18F452, and am a novice, so please forgive me if I am being 
stupid.

I used to use __CONFIG commands for setting config bits, and put up with the 
resultant warnings. However, I just decided to try the newer CONFIG 
commands. My programmer now tells me I have a FUSE error in my HEX file.

I used MPLAB IDE V7.30 "configure/configuration bits" command to look at 
what the bits had been set to. They are different, and maybe I'm missing 
something, but for the life of me I can't undertand why. To expand on this:

OLD:
  __CONFIG	_CONFIG1H,	_OSCS_OFF_1H & _HSPLL_OSC_1H
"configure/configuration bits" shows:
    30001    FE     Oscillator                    HS-PLL Enabled
                             Osc, switch enable    Disabled

Looking at the PIC18FXX2 manual, the value FE makes no sense to me. And yet 
my programmer programs this OK, and the program runs OK - correct oscillator 
speed, too.

NEW:
  CONFIG 	OSC =HSPLL	; Use HS PLL osc.
  CONFIG 	OSCS=OFF	; Disable osc. switching.
"configure/configuration bits" shows:
    30001    26     Oscillator                    HS-PLL Enabled
                             Osc, switch enable    Disabled

Looking at the PIC18FXX2 manual, the value 26 looks correct.  However, my 
programmer tells me I have a FUSE error, and won't program my chip.

All the other values are wildly different too - I just chose the first one 
as an example.

Please could someone enlighten me? I would be very grateful.

Regards,
Phil Cross


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