Graphical display of volt meter on GLCD ,

[faari]

I am writing a program which can take the analogue voltage reading and use adc to convert this signal into digital signal and display In terms of digital values. Initially I was using a digital lcd and displayed the above mentioned data on lcd. Now I need a program which can display the data in the form of a dial (gauge) on GLCD with a needle showing the change in voltage.
I am using

1. PIC – C compiler
2. 18F452 micro controller
3. HDM64GS12 GLCD with a KS0108 display controller. The HDM64GS12 is 128 by 64 pixels GLCD
4. I have driver file “HDM64GS12.c”. This file contains drivers for using a Hantronix HDM64GS12 .
5. I also have a graphics file named ”graphics.c”. It contains functions to draw lines, rectangles, bars, circles and text to a display

My code written for digital lcd is as shown below

#include <18F452.h>
#device ADC=10
#fuses HS
#use delay(clock=12000000)

#include "lcd.c"
char  lcd_string[20];




void print_lcd(char *str)
{
   byte cntr=0;
   
   for (cntr=0;cntr<20;cntr++)
         lcd_putc(str[cntr]);      
}

void PrintVoltage1(float m_Volts)
{
lcd_gotoxy(1,1);
sprintf(lcd_string,"Voltage1 = %3.3f    ",m_Volts);
print_lcd(lcd_string);
}

void PrintVoltage2(float m_Volts)
{
lcd_gotoxy(1,2);
sprintf(lcd_string,"Voltage2 = %3.3f    ",m_Volts);
print_lcd(lcd_string);
}




void main (void)
{
byte m_Cntr=0;
long m_Adc_Value=0;
float m_inp=0.0;
setup_adc_ports(AN0_AN1_AN2_AN3_AN4);
setup_adc(ADC_CLOCK_INTERNAL );

lcd_init();


while(1)
{
   set_adc_channel(0);                //ADC Channel 0
   delay_ms(1);                      //Donot remove delay
   m_Adc_Value=read_adc();
    delay_ms(1);                      //ADC needs some time for reading input so Donot remove this delay
   
   m_inp=(m_Adc_Value/1024.0)*5.0;
   PrintVoltage1(m_inp);
   
  
   
   set_adc_channel(1);               //ADC Channel 1 for reading second input
   delay_ms(1);                      //Donot remove delay
   m_Adc_Value=read_adc();
    delay_ms(1);                       //ADC needs some time for reading input  Donot remove this delay
   m_inp=(m_Adc_Value/1024.0)*5.0;
   PrintVoltage2(m_inp);
   
    delay_ms(100);                   //This delay Can be removed
   

}
while(1);
}

Waiting for some help

 

[udayan92]

What problem are you facing in this situation..?Is it hardware based/software based..?Please give more details about it.