Proteus Help

[Mosaic]

Can anyone using Proteus ISIS verify whether the 16f882 RA6 digital output works in the simulator? All the other PORTS/pins seem fine.

I can't get it to respond to bsf PORTA,6 or bcf PORTA,6. It's holding at an indeterminate gray color state. Not red (hi) or Blue (lo).

If I place a 10K pulldown resistor on it , it will pulldown. But no response to coded outputs at all.

I did the TRISA settings and the ANSEL settings and disabled the clockout etc.
Here's the fuses & port setup code I used

__CONFIG _CONFIG1, _PWRTE_ON & _WDT_OFF & _INTOSCIO & _BOR_OFF & _LVP_OFF & _CP_OFF &_CPD_OFF & _MCLRE_OFF &_INTRC_OSC_NOCLKOUT

__CONFIG _CONFIG2, _IESO_OFF & _FCMEN_OFF


;Setup Ports & ADC

banksel	ANSEL
	movlw b'00000011'; prepare to set bits A0,A1 to analog.
	movwf ANSEL; apply a/d input settings - PORTA
	clrf ANSELH; PORTB all digital
	Banksel TRISA
	movlw b'10000011' ; set bits ,0,1,7 as inputs, rest as outs. 7 is Sw1 digital
	movwf TRISA
	bsf TRISE,3; make E3 (IC pin1) an input- sw0 digital
	clrf TRISB ; Portb all outs.
	CLRF TRISC ; make portC outputs
	movlw b'01111100'	
	movwf OSCCON ; set 8Mhz, Osc setup based on config fuses .
	banksel ADCON1
	clrf ADCON1; left justify ADRESH, Vdd & Vss as Vrefs.
	banksel ADCON0
	clrf ADCON0
	bsf ADCON0,7 ; set sample period to 4 us (8 instruction cycles) @ 8Mhz, An0 is input.
	BankSel HoldL ; back to general variable bank

Lastly, the code I have runs the port fine with the Oshonsoft PIC Simulator.

Any advice on this?

 

[Pommie]

I suspect your problem is that the pin is not defines as I/O but maybe as Oscillator out. This is because your config has two oscillator configuration values.

__CONFIG _CONFIG1, _PWRTE_ON & _WDT_OFF & _INTOSCIO & _BOR_OFF & _LVP_OFF & _CP_OFF &_CPD_OFF & _MCLRE_OFF &_INTRC_OSC_NOCLKOUT

Even though they are both the same value, this may be what is confusing the simulator.

Mike.