[Moved] Errors in code written in Keil Uvision 3

[mithun065285]

i hv written a program part of it i am showing below

#include<reg51.h>
#include<string.h>
sbit rs=p3^1;
sbit en=p3^0;
sbit rw=p3^2;
sbit b=p0^7;
sbit led1=p2^0;
sbit led2=p2^1;
sbit led3=p2^2;
sbit led4=p2^3;
sbit PWM=p2^4;
sbit RL1=p2^5;
sbit RL2=p2^6;

i got following error.pls help me out.

error C202: 'p3': undefined identifier
error C202: 'p0': undefined identifier
error C202: 'p2': undefined identifier
error C202: 'rs': undefined identifier
error C202: 'rw': undefined identifier
error C202: 'p0': undefined identifier
error C202: 'en': undefined identifier
error C202: 'PWM': undefined identifier
error C202: 'b': undefined identifier
error C202: 'led1': undefined identifier
error C202: 'led2': undefined identifier
error C202: 'led3': undefined identifier
error C202: 'led4': undefined identifier
error C202: 'RL1': undefined identifier
error C202: 'RL2': undefined identifier

Target not created

 

[nandhu015]

keil uvision3 error

Port 1 should be written as P1 and not p1.

Use capital P

Nandhu

 

[amraldo]

Re: keil uvision3 error

Open the file reg51 to know how the port can be used.

 

[kongurajesh]

Re: keil uvision3 error

Open the file reg51 to know how the port can be used.

I hv written

#include <reg51x.h>
sbit led=P1^1;
sbit switch=P1^0;
void main()
{
	if(switch=1)
	{
		led=1;
	}
	else
	{
		led=0;
	}
}

Errors are,

led.c(8): error C202: 'led': undefined identifier
led.c(12): error C202: 'led': undefined identifier

Target not created

In main program, switch is in blue colour but led in black colour (ordinary colour)

 

[internetuser2k12]

Re: keil uvision3 error

you cannot use sbit switch = P1^0 because switch is a reserved keyword used in switch case: statements. change switch to sw. Also change switch=1 to sw ==1

Maybe your licence has expired and you don't have reg51x.h on your system.

See if you are getting error reg51x.h file not found in the output window.

Try to change #include <reg51x.h> to #include <reg51.h> and see if that works.

 

[response01]

Re: keil uvision3 error

you cannot use sbit change = P1^0 because change is a earmarked key phrase used in switch case: statements. alter switch the signal from sw. Furthermore modify switch=1 in order to sw ==1

Perhaps your licence has run out and also you don't possess reg51x.l on your method.

Find out if you are receiving problem reg51x.h record not really perfectly located at the end result window.

Try to change #include <reg51x.h> in order to #include <reg51.h> to see in the event that functions.