Beginer Help!

[MINHLE]

I WROTE A BLINK PROGRAM USING 16F628,

CMCON = 7 ; turn comparator off

; the osc used is INTRCIO in the OSCILATOR SELEC OF MELAB

LOOP ; this part copy form melab introduction

HIGH PORTB.7 ; make port B7 high
PAUSE 500 ; pause for 0.5 sec

LOW PORTB.7 ; make port B7 low
PAUSE 500

GOTO LOOP
END

it does not work. the input voltage is 5V ( to the pin 14), the output is 1.0 V for each output pin , no external osc connected; (i HAVE TRIED FOR 3 DIFFERENT IC'S, AND DIFFERENT INTERNAL OSC'S

ANY HELP I DO APPRE.

[Melanie]

And how have you got MCLR connected?

Redo your program adding these two lines at the top...

	@ DEVICE pic16F628, INTRC_OSC_NOCLKOUT
	@ DEVICE pic16F628, MCLR_OFF

[Norbac]

Just pull up the MCLR pin with a 4.7k resistor. Or change the "MCLR Pin function" to "Input pin" on the meProg Configuration section.

See you!!!!!!!!!

[MINHLE]

Thanks, I Will Try,

[MINHLE]

THANKS BOTH OF YOU,

it still does not work
I SEE SOME THINGS HERE:

THERE ARE TWO ILLEGAL OPCODES FOR F16F628 when running the program,

THE MEPROG CONFIGURATION IS IRRELEVANT TO THE PROGRAM?:

1- DEVICE .....INTRC_OSC_NOCLKOUT (set up on osc type on the configuration?)
2- DEVICE.....MCLR_OFF (MCLR_IN set up on the reconfiguration),

(the PICF628 is selected)

[MINHLE]

I add @ DEVICE PIC16F628, __config 0x3D18 to use internal OSC.

and remove @ DEVICE PIC16F628, INTRC_OSC_NOCLKOUT,

it does not work!!