interfacing servo motor with 8051

[Iqbal Muhammad]

hi.. i am having troubles with inetrfacing sevo with 89c51,, i am having the proteus simulation working fine… if any one have the knowledge, please share with me,,..

[ameersultan145]

i have the same problem , servo can’t rotate ,simulation works but practical not.

[Ashutosh Bhatt]

post your hardware circuit and post your program

[Iqbal Muhammad]

here is the diagram…

wysiwyg_imageupload:14311:

[murugan bala]

connect the 9th pin (reset pin) into powersupply .i.e 5V

[Iqbal Muhammad]

here is the code:

 

// Program to rotate servo by 5 degree from previous position starting from 0 degree

 

// 0 degree = 700us 

// 180 degree = 5500us

// Timer1 pulse after 50us -23

 

#include<reg51.h>

sbit output=P1^0;   //Output to motor

int count;

 

void delay(unsigned int msec)   // Function for delay

{

int i,j;

for(i=0;i<msec;i++)

for(j=0;j<1275;j++);

} 

 

void timer(int msec) // Function for timer

{

int i;

TR1=1;

for(i=0;i<msec;i++)

{

while(TF1==0);

TF1=0;

}

TR1=0;

}

void main()

{

int i;

TMOD=0x20; // Mode2

TH1= -23; // 50usec timer

output=0;

count=14;

while(1)

{

if(count>=100)

count=14;

else

count=count+5;

for(i=0;i<200;i++)

{

output=1;

timer(count);

output=0;

timer(360);

}

delay(100);

}

}

[Iqbal Muhammad]

it works in proteus simulation but not working upon hardware connections……

[Ashutosh Bhatt]

first check output at p1.0 pin of micro controller

then check output from LM324

check whether you are getting pulses or not on CRO

[Rohit]

use the debugger to check weather the registers are getting right values or not….

[Author]

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