coding help in keil ???

[jokester4u]

How do i set a time for a line follwing r0b0t when it start from one place and when it get reversed it should stop on the same location where its started?

 

[shruv]

You can keep track using timers,have a variable.After every 1 sec delay,that var is inc.This way your program will know how many secs it has taken to proceed in the forward direction and use the same count,by decrementing the variable to reach to the start position,when reversed. I guess,this should work. Let us know about the progress.

 

[jokester4u]

Can you make a simple program for it plzz ?

 

[jokester4u]

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#include<reg2051.h> 
 
unsigned int m;
void delay()
 {for(m=0;m<=20;m++)
{
TMOD=0X01;
TL0=0xFD;
TH0=0X4B;
TR0=1;
while(TF0==0);
TR0=0;
TF0=0;}}  /// one sec delay
 
sbit L=P3^2;
sbit M=P3^3;
sbit R=P3^4;
 
 
void main ()
 { 
 P1=0x00;
 P3=0xFF;
 
 if (L==1&&M==0&&R==1)
 {P1=0x05;} // forward
 
 
else if (L==1&&M==1&&R==1)
 
{P1=0x0A;}
} // reverse

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This is my progress can you help me out !!!

 

[shruv]

    #include<p89v51rd2.h>
    unsigned int a=0,steps=0,b=0;
	void Timer(void) interrupt 1 // Interrupt No.1 for T0
	{
		TH0=0x4b; 
		TL0=0xfc;
		if(a==20)
		{
			steps++; // after 1 sec
			a=0;
			// if stop is signaled for the robot,stop the timer
		}
		a++;
	}
	void Timer1(void) interrupt 3 // Interrupt No.3 for T2
	{
		TH0=0x4b; 
		TL0=0xfc;
		if(b==20)
		{
			steps--;
			b=0;
			if(steps==0)
			{
				TR1=0; // stop timer
				// stop the robot
			}
		}
		b++;
	}
	void main()
	
	{
		unsigned int fwd=0,rev=0;
		TMOD = 0x11; // Mode1 of Timer0 & mode 1 of timer 1
		
		IEN0 = 0x8a; // Enable interrupt
		while(1) 
		{
			if(fwd==1)
			{
				TH0=0x4b; // Initial values loaded to Timer
				TL0=0xfc;
				TR0=1;
			}
			if(rev==1)
			{
				TH1=0x4b; // Initial values loaded to Timer
				TL1=0xfc;
				TR1=1;
			}
	}

You can simplify this program,I have used timer interrupts.Interface it with two switches 1.fwd 2.rev Also interface lcd to see ur final result.

 

[jokester4u]

it give me errors while running the program and yeah its hould should based on AT89c2051

 

[shruv]

what are the errors it's throwing. Modify the program for AT89c2051. It's just an example.