Sorry I am very new with Assembly and I am using PicKit2 and I can't figure out how to blink all LEDs, I can only Turn on one LED this is my code so for

#include <p16F690.inc> 
__config (_INTRC_OSC_NOCLKOUT & _WDT_OFF & _PWRTE_OFF & _MCLRE_OFF & _CP_OFF & _IESO_OFF & _FCMEN_OFF) 


ORG 0x00
 call setLEDs ; Setup LED outputs
 bsf PORTC,0 ; Turn LED 0 on
 goto $ ; Wait here
 
; Subroutine to setup LED output port on PIC development board
setLEDs 
 BANKSEL TRISC ; Select bank 1
 clrf TRISC ; Set PORTC to outputs
 BANKSEL PORTC ; Select bank 0

 return
 
 END

 

You can, of course, send a byte to the port register to switch a number of pins simultaneously.

Example:
MOVLW B'00001101'
MOVWF PORTA

You can also read a port so if you want to toggle some pins without affecting others you can read, XOR and write back like this:-

MOVF PORTA,W ;copy current state of PORTA into W
XORLW B'00000110' ;Toggle bits 1 and 2
MOVWF PORTA ;Write back to PORTA

 

thanks a lot for your reply, but sorry I am not sure where exactly I should do these changes that you suggested me; should I edit the setLED subroutine with moving the bits 1 and 2?.

 

thanks a lot for your reply, but sorry I am not sure where exactly I should do these changes that you suggested me; should I edit the setLED subroutine with moving the bits 1 and 2?.

You should place them at the point in your program where you wish the LED to change.

 

Sorry I am very new with Assembly and I am using PicKit2 and I can't figure out how to blink all LEDs, I can only Turn on one LED this is my code so for

To initialize ports take a look at the I/O PORTS chapter of the data sheet. To initialize all ports digital "clrf" PORTA, PORTC, ANSEL, and ANSELH.

 

The pickit2 was often bundled with the low cost demo board. This board used a 16f690 chip. Take a look at this site http://www.microchip.com/stellent/i...deId=1406&dDocName=en023805&redirects=pickit2 scroll down to the bottom. And download the Low Pin Count User's Guide. This should get you started