pic did not receive any input

[r0b0t1c]

hi. im using PIC16F877a to make a line following robot.
im programming using C language.
it run with no problem when i simulate it using Proteus.
the problem is, when i flash it into PIC, nothing happen.
the PIC is like not responding when there is input.

for example, when i give input '1' to PORTC RC0,
i want the PIC to send the output '1' to PORTB RB0, something like that.

here is my program

#include <htc.h>
int main(void) {
    TRISB = 0X00; //PortB as output
    TRISC = 0XFF; //PortC as input

    while(1)
    {

//stop
        if(PORTC == 0x00 || PORTC == 0x09 || PORTC == 0x0B || PORTC == 0x0D)
        { PORTB = 0x00;
        }
        
//straight
        if(PORTC == 0x60 || PORTC == 0xF0)
        { PORTB = 0x05;
        }
        
//right
        if(PORTC == 0x80 || PORTC == 0x40)
        { PORTB = 0x01;
        }
        
//left
        if(PORTC == 0x10 || PORTC == 0x20)
        { PORTB = 0x04;
        }
        
//sharp left
        if(PORTC == 0xC0 || PORTC == 0xA0 || PORTC == 0xE0)
        { PORTB = 0x9;
        }
        
//sharp right
        if(PORTC == 0x30 || PORTC == 0x70 || PORTC == 0x50)
        { PORTB = 0x6;
        }

    }
    return 0;
    }

do i need to include any header file or configuration?

 

[pwdixon]

Could be that you are inputting a code not tested for?

The return 0 doesn't do anything and the main could be a void function rather than an int.

 

[jayanth.devarayanadurga]

How many buttons are connected to PORTC or how are you providing high/low to PORTC pins?

 

[r0b0t1c]

so i just change to void main()?

im using logic state
sorry. forgot to attach the circuit
here it is

 

[pwdixon]

so i just change to void main()?

That and removing the return line.

Your circuit appears to be missing all the power supply decoupling, crystal, input and reset circuitry.

 

[jayanth.devarayanadurga]

Ok. The problem is you have to pullup MCLR pin high with a 10k resistor. Connect a 10k resistor between MCLR pin and +5V. That should work.

 

[betwixt]

Also check you have programmed the configuration fuses. I'm not sure about Proteus but most simulators ignore fuse settigs when they run but a real processor must have them configured.

Brian.

 

[learner71]

First ensure that microcontroller is working or not. Just set any pin as High or low to get confirmation that CLK and reset are applied correctly to microcontroller. If it is working. Then you have you check whether PORTC by default is IO or not. If not check the register configuration in Datasheet.