18F6680 and portd problems.

[BobK]

Hi jkbh,

I didn't take the time to look up the data sheet on this micro but:

"Y3 var latd.3" At what point did you declare Portd.3 = latd.3?

All of your X variables have been assigned to a port pin but none of the Y variables have a specific port assignment. I'm still a beginner at programming but this stood out to me.

BobK

[Bruce]

What are your config fuse settings?

[mister_e]

Just recall that: why using Y3 var latd.3 instead of Y3 VAR PORTD.3?

Just out of curiosity!!!

[Bruce]

On the 18F series, when you have a mixture of inputs & outputs on the
same port, writing to the LAT register VS the port bit directly avoids the
read-modify-write problem.

[BobK]

Thanks Bruce,

I'll put that note in my handbook! That's what I like about this site. You always learn something!

BobK

[jkbh]

I´m gonna check my config bits tomorrow,but I think I have got it right.
I know I have set:
HS PLL mode.
Power on timer enabled.
Turned off watchdog.

What config bits shall I use if I just want to use PORTD as Digital I/Os.
/Jimmy

[jkbh]

Hers my current Configuration Bits.

I have put these in the 18F6680.INC file in the PBP directory.
Is this the right way to do it?

__CONFIG _CONFIG1H, _OSC_HSPLL_1H
__CONFIG _CONFIG2L, _PWRT_ON_2L
__CONFIG _CONFIG2H, _WDT_OFF_2H & _WDTPS_128_2H
__CONFIG _CONFIG4L, _LVP_OFF_4L & _STVR_OFF_4L
__CONFIG _CONFIG5H, _CPD_OFF_5H
__CONFIG _CONFIG6H, _WRTD_OFF_6H

/Jimmy