Floating value on LCD

[neelam29]

Hi friends,
I'm doing programming in Hitech C, my uC is PIC16F877A & displaying on 16x2 LCD I'm trying to display a integer value on above line & floating value on lower line of lcd using the following commands, the integer value is comming but the floating value isn't comming instead it's showing ' f ' on LCD

lcd_goto(0x80);
x_int=314;
sprintf (buf, "%d", x_int);
lcd_puts(buf);

lcd_goto(0xC0);
y_float=11.22;
sprintf (buf, "%f", y_float);
lcd_puts(buf);

a similar thing i had done with keil C51 & At89c52 it was working properly.

Can you please guide me.....

With best regards,
Neelam

 

[Papabravo]

Are you sure that the compiler and the library function can even dispaly a floating point number?

 

[donniedj]

Try sending the integer and the float to the same location but separated by time. This will rule out address overflowing.

Does lcd_goto() use the actual command for the address or the hex address itself? For instance, 0x80 is the command code to position at address 0x00. Your lcd_goto() seems to operating more like lcd_command(). lcd_goto(0x00) for first line and lcd_goto(0x40) for second line makes more sense.

 

[kchriste]

Are you compiling with the -LF option? I believe that the standard library, 96LIBC.LIB, contains versions of sprintf and printf that do not support floating point.
You need to make the compiler use the 96LIBF.LIB instead.

 

[neelam29]

Thanks a lot kchriste. Your method worked out. Thanks once again to all of you.

With best regards,
Neelam