PIC18F4520 to LCD JHD162A LCD C- Program.

Hi all,

Need some help to display the result to the LCD JHD162A LCD. exp : 6+4=10

below is my c-program. I am using MPlab.

#include <PIC18F4520.h>
#include <htc.h>
//--------------------------------
#define bit0 PORTAbits.RA0
#define bit1 PORTAbits.RA1
#define bit2 PORTAbits.RA2
#define bit3 PORTAbits.RA3
//--------------------------------
#define bit4 PORTBbits.RB0
#define bit5 PORTBbits.RB1
#define bit6 PORTBbits.RB2
#define bit7 PORTBbits.RB3
//--------------------------------
#define s1 PORTCbits.RC0
#define s2 PORTCbits.RC1
#define s3 PORTCbits.RC2
#define s4 PORTCbits.RC3
//--------------------------------

int main()
{
TRISAbits.TRISA0=1; //configure PortA 0,1,2,3 as input
TRISAbits.TRISA1=1;
TRISAbits.TRISA2=1;
TRISAbits.TRISA3=1;
//--------------------------------
TRISBbits.TRISB0=1; //configure PortB 0,1,2,3 as input
TRISBbits.TRISB1=1;
TRISBbits.TRISB2=1;
TRISBbits.TRISB3=1;
//--------------------------------
TRISCbits.TRISC0=1; //configure PortC 0,1,2,3 as input
TRISCbits.TRISC1=1;
TRISCbits.TRISC2=1;
TRISCbits.TRISC3=1;
//--------------------------------
TRISD=0; //output
//--------------------------------
{
unsigned int num1;
unsigned int num2;
unsigned int ans;

num1= ((bit0*1)+(bit1*2)+(bit2*4)+(bit3*8));
num2= ((bit4*1)+(bit5*2)+(bit6*4)+(bit7*8));


while (1)
{
if(s1 == 1) // '+' operation
{ ans = num1 + num2;
printf("num1+num2=%.2f",num1+num2);
break; //delay(10);
}
else if(s2 == 1) // '-' operation
{ ans = num1 - num2;
printf("num1-num2=%.2f",num1-num2);
break; //delay(10);
}
else if(s3 == 1) // '*' operation
{ ans = num1 * num2;
printf("num1*num2=%.2f",num1*num2);
break; //delay(10);
}
else if(s4 == 1) // '/' operation
{ ans = num1 / num2;
printf("num1/num2=%.2f",num1/num2);
break; //delay(10);
}
PORTB=ans;
return (0);
}
}
}

I tried to use printf, but i didn't work.

p/s: is my code got any mistake?

thank you so much

LCD initialization required also print f not print directly print ur any data on lcd.

Hi,

you have just made the pin (PORTA) as an output but it is not defined in the code that the pin behavior is analog or digital. Its is done via writing to ADCON register. Select the pins you want to make digital.

Also post your complete code to help you out.

Enjoy!

Golden Electronics said:

LCD initialization required also print f not print directly print ur any data on lcd.

Click to expand...

I thought PIC18 no need LCD initialization?

- - - Updated - - -

babar_ali said:

Hi,

you have just made the pin (PORTA) as an output but it is not defined in the code that the pin behavior is analog or digital. Its is done via writing to ADCON register. Select the pins you want to make digital.

Also post your complete code to help you out.

Enjoy!

Click to expand...

Above is my complete code. I am a beginner. Still learning C-program. Sorry.

ADCON? How am I suppose to use it? still learning!

How Compiler know ur assign pin such as LCD DATA pin, RW, RS & EN etc if u used LCD 16x2.
if u required initialization u get ready code on Google search.