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.

[CuriousOne]

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

'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
DEFINE OSC 16
'ANSELE=%00000000 'enable adc input porte.2
'ANSELA=%00000010 'disable ADC on A
'ANSELB=%00000000 'disable ADC on B
'ANSELD=%00000000 'disable ADC on D
ANCON1=0 'DISABLE ADC D3-D2-D1-D0-
TRISC=%00000000 'set PORTC as output all 0.

TRISD=%00000000 'set PORTD as output all
TRISB=%00000000 'set PORTB as output all
TRISA=%00000000 'set PORTA 2 as input, others as output
TRISE=%0000000 'set PORTE as output all


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


Still does not work. In this example, PORTD.0 measures 2.5 volt and does not change.
same to any other port.

[tumbleweed]

Sorry, I didn't mean for you to get rid of the other CONFIG settings... just change the OSC ones.

Here's a complete example


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

'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

'with PLLEN=1
DEFINE OSC 64
'with PLLEN=0
'DEFINE OSC 16

ANCON0=0 ' digital IO AN7-AN0
ANCON1=0 ' digital IO AN8-AN14

TRISC=%00000000 'set PORTC as output all
TRISD=%00000000 'set PORTD as output all
TRISB=%00000000 'set PORTB as output all
TRISA=%00000000 'set PORTA as output all
TRISE=%0000000 'set PORTE as output all


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


If you're using a DVM and measuring 2.5V, that probably means the pin is toggling but it's too fast for the meter,
so the 'DEFINE OSC' doesn't match your actual settings and the 'PAUSE' is wrong.

Try increasing the pause time to 5000 or 10000


I want to run it at 16mhz and then try 64mhz, to see if there's any practical difference in i2cread and shiftout statements
You'll see a difference, but it likely won't be earth shattering.
To really effect the I2C speed you'd need to switch to using the MSSP hardware, and while that SHOUT routine I posted is faster than shiftout, it won't be as fast as using the SPI peripheral.

[CuriousOne]

I will try to check it with scope next week, but my multimeter is Amprobe PM55A, it can do 5 samples per second and actually works even with pause 200 :)

MSSP might be good, but I was not able to run any of code samples given here on 16F series and I was not able to start any 18F series chip at all :(

[tumbleweed]

Just try changing the on-off pause statements so that it's not 50 % duty cycle.
Pause 2000, pause 6000 or pause 6000,pause 2000 should get you a different reading if the output is actually changing.