L293D interfacing with 8051

[Ashwani Garg]

This code is not workign ,why ?

my circuit is also according to the program code,all pics are good and well checked.

 

// Program to display dynamic text on LCD
#include<reg51.h>
#define msec 50
sbit rs=P2^0;   //Register select (RS)
sbit rw=P2^1;   //Read write (RW) pin
sbit en=P2^2;   //Enable (EN) pin
sbit m01=P2^3;    //input to L293D
sbit m02=P2^4;     //input to L293D
unsigned char commands[]={0x38,0x0E,0x01,0x06,’’};  //Command to be sent to LCD
char name[]={“*ECE ROCKS*”};    //String to be displayed on LCD
void delay(unsigned int time)  //Time delay function
{
unsigned int i,j;
for(i=0;i<time;i++)
  for(j=0;j<1275;j++);
}
void lcdcmd(unsigned char value)  //Function for sending values to the command register of LCD
{
P1=value;
rs=0;
rw=0;
en=1;
delay(1);
en=0;
return;
}
void display(unsigned char value)  //Function for sending values to the data register of LCD
{
P1=value;
rs=1;
rw=0;
en=1;
delay(1);
en=0;
return;
}
void main()
{
int i,j;
for(i=0;commands!=’’;i++)  //Sending string to LCD
{
  lcdcmd(commands);
  delay(msec);
}
for(j=0;name[j]!=’’;j++)
{
  display(name[j]);
  delay(msec);
}
m01=m02=0;
delay(msec);

while(1)
{
m01=1;
        m02=0;            // down
       
        delay(msec);       
       

         
        m01=0;
        m02=1;    // stop
        delay(msec);   

  lcdcmd(0x1C);  //Shift the entire display to right
  delay(75);
}
}
 

 

 

[Vicky]

Can you tell me what error message says ????

[Ashwani Garg]

wysiwyg_imageupload:7753:

[Ashwani Garg]

i am using AT89S52 CONTROLLER,,

 

L293D MOTOR DRIVER

 

16×2 LCD

 

Two supply voltages for motor and IC’s.

 

,i don’t know,what is going wrong

[Vicky]

In this above image there is no error find in your code. Tell me your problem exactly.

[Arjun Vaghani]

/*motor.c*/

/*try this out , it’s very simple*/

/*LCD is not necessary for L293D’s interfacing with AT89S52, So i have not given, but u can add that code separately*/

 

/*program-start*/

 

#include<reg51.h>

main()

{

while(1)

{

unsigned char t;

t=P1&0x0f;                             //read the data from port P1

switch(t)

{                                              /*block for taking action according to input*/

case 0x02:P2=0x85;            /*forward*/

 break;

case 0x04:P2=0x86;          /*left*/

 break;

case 0x06:P2=0x89;           /*right*/

 break;

case 0x08:P2=0x8A;        /*backward*/

 break;

case 0x05:P2=0x00;          /*stop*/

 break;

case 0x00:P2=0x00;       /*no input*/

 break;

}

}

}

 

/*In Diagram Shown Below, by Configuring Port P1 for Different Input Combinations , U can get the Action Performed by the DC Motor, i.e Desired Motion.*/

 

wysiwyg_imageupload:7864:

 

[Ashwani Garg]

Thank you very much Mr.Arjun

[balaji]

HI ASHWANI

i see your code of motor driver ,your code will be wrong that why its didn,t get uotput ,if keil it show no warning and no error according to her library only ,

[Author]

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