"hello world" with 18f6680

[dragons_fire]

i tried checking voltage again. i get around 3mV DC across OSC1-OSC2. on the AC setting it shows nothing but im using a digital meter which might be too slow. i dug out my analog meter, but i have no clue where the leads are for it....

the OSC is a 20.0Mhz ceramic resonator with built in caps. its mountet fairly close to the PIC.

i have tried some of the different clock settings with no luck and i have switched resonators once just in case it was a bad one...

[skimask]

i get around 3mV DC across OSC1-OSC2

That sounds a bit goofy, but I'm not looking at what you're dealing with.

Have you tried a SLOWER oscillator yet, like the R/C, anything, just a signal enough to get it moving?
Heck anything, clicking a push button on/off on the OSC1 pin?

And give these config settings a shot:

OSC "HS" - good

System clock "disabled" - good enough, but I like to leave it enabled so I can play with
changing clock speeds

power up timer "disabled" - I'd enable it, gives the clocks more time to spool up and stabilize, causes fewer errors, especially at higher speeds

brown out reset "enabled" - ok, if you're into that sort of thing

brown out voltage "2.0V" - good

watchdog timer " enabled" - don't need it, so disable it

the rest are good...in my mind anyways...

[mackrackit]

Are you setting the fuses in the code or in the *.inc?

Either way, Post what you have, I know what you say you have but how? The 18s sometimes are a bit "picky" this way. At least with different versions of PBP.

[dragons_fire]

there in the inc file.. i was just reading them from the epic programmer. it has a list of what everything is set as, and i can change it there too..

i made it all with SMT stuff, and its pretty tiny (yes ive checked for crossed traces) so i have no other OSC's to connect to it. and i think its too small to wire up jumpers too...

[dragons_fire]

heres my INC file..


NOLIST
ifdef PM_USED
LIST
"Error: PM does not support this device. Use MPASM."
NOLIST
else
LIST
LIST p = 18F6680, r = dec, w = -311,w = -230, f = inhx32
INCLUDE "P18F6680.INC" ; MPASM Header
__CONFIG _CONFIG1H, _OSC_HS_1H
__CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_128_2H
__CONFIG _CONFIG4L, _LVP_OFF_4L
NOLIST
endif
LIST
EEPROM_START EQU 0F00000h
BLOCK_SIZE EQU 8

[mackrackit]

See post 14 of this thread. One of the PBP versions fixed this but I am not sure which one, Been doing it this way since 2.43. Still works for me.

[dragons_fire]

so i want it like this???


CONFIG OSC = HS

CONFIG LVP = OFF

CONFIG BOR = OFF

CONFIG MCLRE = ON


and not like this??

__CONFIG _CONFIG1H, _OSC_HS_1H
__CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_128_2H
__CONFIG _CONFIG4L, _LVP_OFF_4L

i tired changing it, and i switched to a 10Mhz resonator that i know works, and im still having this problem.. do you think it could be the chip? or if there was a problem with it, would i still be able to program it and read the code back??

thanks for the help guys