"hello world" with 18f6680

[mackrackit]

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

See this
http://www.picbasic.co.uk/forum/show...87&postcount=6
But I guess it was fixed in 2.47?

Get the bread board stuff or a ZIF socket for developing. Will save a few headaches, may add a few too, but they will be different

[dragons_fire]

ok.... i think i saw that before, but it didnt make any sense... i think i get it now...

[Darrel Taylor]

Somethings confusing me here.

<img src="http://www.picbasic.co.uk/forum/attachment.php?attachmentid=2301&stc=1&d=120156330 8" />

The schematic shows GND on pin 1 of the ICSP connector.
But Pin2 (+5V) goes to the center pin of the resonator.

Is the schematic wrong? Or am I looking at the pins wrong?
<br>

[dragons_fire]

just going through the datasheet for the 6680 again, it says i may need a resistor between OSC2 and the resonator if its an AT strip cut crystal... how do i know if i need that resistor???

[dragons_fire]

Darrel, i just looked at it, and i thought you had found it.. i stuck my meter on it and it says its correct. so i went back to the schematic and looked. its the otehr 5-pin header on the schematic that is for ISCP, the one you highlighted goes to the other board, and comes from the power supply. its the straight header on the board.

i wish you were right... then i would actually know what i did wrong...

[Darrel Taylor]

Yup, should have, should have seen that.

Can you show the board layout's?
It's hard to follow past the via's.
<br>

[dragons_fire]

ill see what i can do about the layout.. ive looked over it and it seems ok, but what do i know!!! i used eaglecads autoroute function so everything "should" be connected properly...

[dragons_fire]

theres the image of the board, and i will attach the eagle file here too.

i labelled all the "important" pins. the rest go to I/Os.... and MCLR2 resistor, is a 1Mohm resistor, and its for PGM. i just didnt relabel it when i put it in there... and there was an issue with the gnd side of the caps, so i ran a jumper wire from there to the ground pin..