old chestnut, 18f2550, fuses, osc's leds...

[f_lez]

Ok 4mhz crystal, 18f2550, led...

basic program is simple enough

'
'
define osc 16

ADCON0 = 0
CMCON = 7

trisa=0

loop:
porta=255
pause 1000
porta=0
pause 1000
goto loop
'
'
'

and these fuses are in a p18f2550fuses.inc

	CONFIG PLLDIV = 1                 ; set for 4mhz to pll   
	CONFIG CPUDIV = OSC4_PLL6 ; set for 16mhz cpu core
        CONFIG USBDIV = 2               ; usb=pll/2
	CONFIG FOSC = HSPLL_HS      
	CONFIG FCMEN = ON       

;
;
;
;

(other fuses omitted)

thing is i can set the define osc to whatever i want, the speed the led flashes at is not changed, i thought the define osc was used to re-compile the delays etc in the pause routines? (amongst other things)

why do i not see a speed change in the led when i change it, why do i not see one second on and one second off, its more like a 1/4 of that irrespective of setting of define osc

I can set the fuses for the chip by hand at burn time, so i know the fuses are burned correctly as if i do set them by hand, same result, also if i set them wrong i can get faster flashing, but i cant get it to slow to 1hz irrespective of cpudiv/osc etc, i seem to get 2/4/8hz

[Darrel Taylor]

MPASM is case sensitive.

change...

define osc 16

-- to --

define OSC 16

[f_lez]

Omg...........

[comwarrior]

isn't case sensitivity a swine at times...

[f_lez]

not as much as usb connectivity.....

which i still have not mastered.