[SOLVED] pic18 not simulating in proteus

[h.sharma]

hello everyone when I am simulating for pic18 mc in proteus it is not simulating expected, bt it is working perfect 4 pic16

my hex file is running perfect in pic simulator and also in debugging in mplab

i am attaching my ckt simulating in proteus

there is no prob with proteus for pic16

plz tell me whats wrong with this ckt and how to simulate for pic18 in proteus

my code is

#include<p18f4550.h>
#include<delays.h>
int i,d;
#define us(d) for(i=0;i<d;i++){Delay1TCY();}
#define ms(d) for(i=0;i<d;i++){Delay1KTCY();}

void main(void){
TRISB=0x00;
TRISD=0X00;
while(1){
PORTB=0XFF;
PORTD=0XFF;
}
}

 

[wp100]

Hi,

Try pulling up Pin1 Mclre

 

[bigdogguru]

One issue is that the PORT pins RB0:RB4 are configured as ADC inputs, NOT digital I/O on device reset.


Reference: PIC18F2455/2550/4455/4550 Datasheet, Section: 10.2 PORTB, TRISB and LATB Registers, Page 116

Note:

On a Power-on Reset, RB4:RB0 are
configured as analog inputs by default
and read as ‘0’; RB7:RB5 are configured
as digital inputs.

By programming the Configuration bit,
PBADEN (CONFIG3H<1>), RB4:RB0 will
alternatively be configured as digital inputs
on POR.

Try the following port initialization:

LATB = 0x00;
ADCON1 = 0x0E;
TRISB = 0x00;

BigDog

 

[h.sharma]

thanx bigdogguru it worked after pulling up mclr

very very thanx