display float on 16x2 LCD in PIC 16F877 using Hi-tech C compiler

[ecaits]

Hi friends,

I want to display float value on LCD display in PIC16F877 using Hi-tech C compiler.

Can anybody help me???

 

[milan.rajik]

Use Sprintf() function.

 

[ecaits]

Use Sprintf() function.

Can you give me some hint on code???

 

[bigdogguru]

Specifics concerning the use of the sprintf() routine for the HiTech C Compiler are available in its user manual.

Most of the information concerning sprintf() is in the section covering printf() and vprintf() on page 212.

General Examples of the sprintf() routine:

C library function - sprintf()

function sprintf()

C Language: sprintf function


BigDog

 

[Raj Gunaseelan]

Hi ecaits,
sprintf() can eat up more memory on PIC16F877. Fixed point arithmetic is good. But if you still want to use float, use the follwoing code to display on LCD.

#define DECIMAL_PLACES    (100)    // 2 digits after decimal

void displayFloat(float value)              // Assume value = 123.456
{
      unsigned long a = value;              // a = 123
      value = (value - (float)a) * (DECIMAL_PLACES);       // value = 45.6
      unsigned long b = value;              // b = 45

      display(a);
      display('.');
      display(b);
}

Raj Gunaseelan