Confusion with 18F45K80 config, maybe someone has working one?

[CuriousOne]

Hello. Trying to blink a led using 18F45k80.
Seems that I have some config issue, since it does not works on any of the pins - voltage there is around 1.8--2.5v, and does not change. Here's my code. What I'm doing wrong?

;----[18F45K80 Hardware Configuration]------------------------------------------
#IF __PROCESSOR__ = "18F45K80"
  #DEFINE MCU_FOUND 1
#CONFIG
  CONFIG  RETEN=ON, INTOSCSEL=HIGH, SOSCSEL=HIGH, XINST=OFF, FOSC=HS1, PLLCFG=ON
  CONFIG  FCMEN=OFF, IESO=OFF, PWRTEN=OFF, BOREN=SBORDIS, BORV=3, BORPWR=ZPBORMV
  CONFIG  WDTEN=SWDTDIS, WDTPS=512, CANMX=PORTB, MSSPMSK=MSK7, MCLRE=OFF
  CONFIG  STVREN=ON, BBSIZ=BB2K, CP0=OFF, CP1=OFF, CP2=OFF, CP3=OFF, CPB=OFF
  CONFIG  CPD=OFF, WRT0=OFF, WRT1=OFF, WRT2=OFF, WRT3=OFF, WRTC=OFF, WRTB=OFF
  CONFIG  WRTD=OFF, EBTR0=OFF, EBTR1=OFF, EBTR2=OFF, EBTR3=OFF, EBTRB=OFF
#ENDCONFIG


#ENDIF


;----[Verify Configs have been specified for Selected Processor]----------------
;       Note: Only include this routine once, after all #CONFIG blocks
#IFNDEF MCU_FOUND
  #ERROR "No CONFIGs found for [" + __PROCESSOR__ +"]"
#ENDIF


osccon=%11111111
DEFINE OSC 16


ANCON1=0 'DISABLE ADC D3-D2-D1-D0-
TRISC=%00000000 'set PORTC as output all
TRISD=%00000000 'set PORTD as output all
TRISB=%00000000 'set PORTB as output all
TRISA=%00000000 
TRISE=%0000000  'set PORTE as output all

GKO:
HIGH PORTa.0
PAUSE 2000
LOW PORTa.0
PAUSE 2000
GOTO GKO

[HenrikOlsson]

First, turn off analog functionality on the pins you're trying to use (PORTA.0 for example).
Second, not all pins on that device has the same drive strength. PortA should be able to drive a LED though.

I have not looked at the oscillator settings but if the above does not help that would be my next thing to check.

[mpgmike]

At 1.8 to 2.5 VREF, you may not have enough voltage for the LED. Try at 5 volts and see if it's switching properly.

[CuriousOne]

I'm feeding it with 5 volts.
I tried to check voltages with multimeter, without the LED, all the same.
Tried each pin of each port...

[tumbleweed]

Judging from your settings I'm going to assume you're trying to use the INTOSC.

If so, you need to set the CONFIG to use it. That's what controls what happens at powerup...
trying to setting the OSCCON register is a run-time setting, so it relies on the thing running in the first place.

The default INTOSC setting is 8MHz, so it'll run at that speed until you change it with OSCCON.


Try this:

  CONFIG  RETEN=ON, INTOSCSEL=HIGH, SOSCSEL=HIGH, XINST=OFF, FOSC=INTIO2, PLLCFG=OFF

'then later you can change it
OSCCON = $70     ' IRFC[2:0] = 111 (16MHz), SCS[1:0] = 00 (primary CONFIG osc setting)
' set PLLEN (optional, 4x16MHz=64MHz)
'OSCTUNE.6 = 1

[CuriousOne]

Thanks!
I will try it today later.
I want to run it at 16mhz and then try 64mhz, to see if there's any practical difference in i2cread and shiftout statements, since on 16F, oscillator speed has no impact on these statement speed, which is around 50khz, whenever oscillator is 4mhz or 16mhz.