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

ecaits · Feb 18, 2014

Hi friends,

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

Can anybody help me???

milan.rajik · Feb 18, 2014

Use Sprintf() function.

ecaits · Feb 18, 2014

milan.rajik said:
Use Sprintf() function.

Can you give me some hint on code???

bigdogguru · Feb 18, 2014

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 · Feb 18, 2014

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.

Code:

#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

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

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

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