HI...

[Cable Guy]

Hi..
i'm new here...
i worked on project titled mobile robot using LDR sensor...
i plan to use 2 sensor using LDR for my mobile robot..
And for motor driver, i used Tamiya DC motor with gearbox...
For software, i used CCS PIC C Compiler...
I already write the program and CCS compiled it with no error...
But i cautious if the program can make my robot moves...
Can someone help me...

Here sample project i write myself...



#include <16f877a.h>//Select PIC type=PIC16F877
#USE DELAY( CLOCK=20000000 ) //Select your oscillator speed=20MHz crystal
#FUSES HS,NOWDT,NOPROTECT//Select the oscillator type
#byte port_b=6//Define the Address of PORTB
#byte port_d=8//Define the Address of PORTD

main()//Declare main program

{

set_tris_b(0b00000000);//Set port_b0 to be input
set_tris_b(0b00000001);//Set port_b1 to be input
set_tris_d(0b00000000);//Set D0, D1 as output (D0=LED, D1=Relay to Motor)
set_tris_d(0b00000001);//set D2, D3 as output (D2=LED, D3=Relay to Motor)
port_d = 0;//Initialize all PORTD output to 0 Volt

for(;;)//Do forever

{

if ( (INPUT(PIN_B0)==0)||(INPUT(PIN_B1)==0))

{
//Turn both LED and Motor ON when both Sensors activated
output_high(PIN_D0);
output_high(PIN_D1);
output_high(PIN_D2);
output_high(PIN_D3);

}

else if ( INPUT(PIN_B0) == 0 )

{
//Turn LED1 and Motor1 ON when Sensor1 activated
output_high(PIN_D0);
output_high(PIN_D1);
output_low(PIN_D2);
output_low(PIN_D3);
}

else if (INPUT(PIN_B1)==0)

{
//Turn LED2 and Motor2 ON when Sensor2 activated
output_high(PIN_D2);
output_high(PIN_D3);
output_low(PIN_D0);
output_low(PIN_D1);
}

else

{
//Turn both LED and Motor OFF when both sensors not activated
output_low(PIN_D0);
output_low(PIN_D1);
output_low(PIN_D2);
output_low(PIN_D3);
}


} // close for loop


} // close main program
_________________
Lets Rock n' Roll

[deepakomanna]

while checking condition use && operator insted ||,
you can try,
B0 B1
0 0 ====> 1st condition
0 1 ====> 2nd condition
1 0 ====> 3rd condition
1 1 ====> 4th condition
So you can define like this

if((INPUT(PIN_B0) == 0) && (INPUT(PIN_B1) == 0)) {
// add ur statements.
}
else if((INPUT(PIN_B0) == 0) && (INPUT(PIN_B1) == 1)) {
// add ur statements.
}
else if((INPUT(PIN_B0) == 1) && (INPUT(PIN_B1) == 0)) {
// add ur statements.
}
else {
// add ur statements.
}

may be this will some idea
_________________
Thank You,
With Best Regards,
Deepak.

[Cable Guy]

i also consider to use PWM in my program...
and so to add a few delay time ==delay...
so anyone can help me...
and tq deepak...
_________________
Lets Rock n' Roll

[Wayne_]

I am pretty sure this is wrong :-
set_tris_b(0b00000000);//Set port_b0 to be input
set_tris_b(0b00000001);//Set port_b1 to be input
set_tris_d(0b00000000);//Set D0, D1 as output (D0=LED, D1=Relay to Motor)
set_tris_d(0b00000001);//set D2, D3 as output (D2=LED, D3=Relay to Motor)

Your first set_tris_b is setting all port_b as output.
Your second set_tris_b is overwriting the first and only setting b0 as input.
The first set_tris_d sets port_d as output but then you set d0 as input in the next line.

You just need

[Ttelmah]

Even worse, there needs to be the #use fast_io lines added for each port.
As it stands, the code sets: