I have successfuly programmed LED flashing programme with those normal codes (MOV and all that..) now, I'm trying this XOR one but, don't understand why this is not working.

list p=16f690
	#include<p16f690.inc>
	
	#define LED PORTC,0;Define pin 0 of port c as LED
	
	__CONFIG  _MCLRE_ON & _CP_OFF & _WDT_OFF & _INTRC_OSC_NOCLKOUT
	ERRORLEVEL    -302

TEMP_VAR UDATA
temp     RES 1
delay1   RES 1;reserves 1 byte for delay1
delay2   RES 1;reserves 1 byte for delay2

;*******************************************************************
Main:;Main programme begains
	CODE 0x05; Start address at 0x05
Setpins:; Select output and input
	bsf STATUS,RP0 ;Switch to bank 1
	movlw b'11110';MOVe 11110 to W
	movwf TRISC    ;set pin 0 of PORT C as output
	bcf STATUS,RP0 ;Switch back to bank 0
	movlw b'00001';MOVe 00001 to W
Start:
	xorwf LED
	call Loop
	call Loop
	goto Start
Loop:
	decfsz delay1,1
	goto Loop
	decfsz delay2,1
	goto Loop
	return
	END

 

Try:

xorwf PORTC, F

Or change the definition of LED to PORTC, 1

 

Thanks ! for that, actually it was the XOR problem as you said and also that I needed to make PORTC, 0 as digital output by :

ANSEL,ANH04