Accelerometer Analog 3 Axis with Display LCD

#include <mega16.h>

#include <delay.h>
#include <stdlib.h>

// Alphanumeric LCD functions
#include <alcd.h>

#define ADC_VREF_TYPE 0x00

// Read the AD conversion result
unsigned int read_adc(unsigned char adc_input)
{
           ADMUX=adc_input | (ADC_VREF_TYPE & 0xff);
           // Delay needed for the stabilization of the ADC input voltage
           delay_us(10);
           // Start the AD conversion
           ADCSRA|=0x40;
           // Wait for the AD conversion to complete
           while ((ADCSRA & 0x10)==0);
           ADCSRA|=0x10;
           return ADCW;
}

// Declare your global variables here
unsigned char temp[4],X,Y,Z;

unsigned char get_X()
{
           unsigned char i;unsigned int dataADC=0,kumulatif=0;
           for(i=0;i<20;i++)
           {
           dataADC=read_adc(0);
           if(dataADC>370)
           {
           dataADC=(dataADC-390)*0.21;
           }else{
           dataADC=0;
           }
           if(dataADC>180)
           {
           dataADC=180;
           }
           kumulatif=kumulatif+dataADC;
           }
           return kumulatif/20;
}

unsigned char get_Y()
{
 unsigned char i;unsigned int dataADC=0,kumulatif=0;
 for(i=0;i<20;i++)
 {
           dataADC=read_adc(1);
           if(dataADC>388)
           {
           dataADC=(dataADC-390)*0.21;
           }else{
           dataADC=0;
           }
           if(dataADC>180)
           {
           dataADC=180;
           }
           kumulatif=kumulatif+dataADC;
           }
           return kumulatif/20;
}

unsigned char get_Z()
{
  unsigned char i;unsigned int dataADC=0,kumulatif=0;
  for(i=0;i<20;i++)
  {
   dataADC=read_adc(2);
   if(dataADC>370)
   {
     dataADC=(dataADC-388)*0.21;
     }else{
     dataADC=0;
     }
     if(dataADC>180)
     {
      dataADC=180;
     }
     kumulatif=kumulatif+dataADC;
    }
   return kumulatif/20;
}

void main(void)
{
// Declare your local variables here

// Input/Output Ports initialization
// Port A initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTA=0x00;
DDRA=0x00;

// Port B initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTB=0x00;
DDRB=0x00;

// Port C initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=T State1=T State0=T
PORTC=0x00;
DDRC=0x00;

// Port D initialization
// Func7=In Func6=In Func5=In Func4=In Func3=In Func2=In Func1=In Func0=In
// State7=T State6=T State5=T State4=T State3=T State2=P State1=P State0=P
PORTD=0x07;
DDRD=0x00;

// Timer/Counter 0 initialization
// Clock source: System Clock
// Clock value: Timer 0 Stopped
// Mode: Normal top=0xFF
// OC0 output: Disconnected
TCCR0=0x00;
TCNT0=0x00;
OCR0=0x00;

// Timer/Counter 1 initialization
// Clock source: System Clock
// Clock value: Timer1 Stopped
// Mode: Normal top=0xFFFF
// OC1A output: Discon.
// OC1B output: Discon.
// Noise Canceler: Off
// Input Capture on Falling Edge
// Timer1 Overflow Interrupt: Off
// Input Capture Interrupt: Off
// Compare A Match Interrupt: Off
// Compare B Match Interrupt: Off
TCCR1A=0x00;
TCCR1B=0x00;
TCNT1H=0x00;
TCNT1L=0x00;
ICR1H=0x00;
ICR1L=0x00;
OCR1AH=0x00;
OCR1AL=0x00;
OCR1BH=0x00;
OCR1BL=0x00;

// Timer/Counter 2 initialization
// Clock source: System Clock
// Clock value: Timer2 Stopped
// Mode: Normal top=0xFF
// OC2 output: Disconnected
ASSR=0x00;
TCCR2=0x00;
TCNT2=0x00;
OCR2=0x00;

// External Interrupt(s) initialization
// INT0: Off
// INT1: Off
// INT2: Off
MCUCR=0x00;
MCUCSR=0x00;

// Timer(s)/Counter(s) Interrupt(s) initialization
TIMSK=0x00;

// USART initialization
// USART disabled
UCSRB=0x00;

// Analog Comparator initialization
// Analog Comparator: Off
// Analog Comparator Input Capture by Timer/Counter 1: Off
ACSR=0x80;
SFIOR=0x00;

// ADC initialization
// ADC Clock frequency: 500,000 kHz
// ADC Voltage Reference: AREF pin
// ADC Auto Trigger Source: Free Running
ADMUX=ADC_VREF_TYPE & 0xff;
ADCSRA=0xA1;
SFIOR&=0x1F;

// SPI initialization
// SPI disabled
SPCR=0x00;

// TWI initialization
// TWI disabled
TWCR=0x00;

// Alphanumeric LCD initialization
// Connections are specified in the
// Project|Configure|C Compiler|Libraries|Alphanumeric LCD menu:
// RS – PORTC Bit 7
// RD – PORTC Bit 6
// EN – PORTC Bit 5
// D4 – PORTC Bit 3
// D5 – PORTC Bit 2
// D6 – PORTC Bit 1
// D7 – PORTC Bit 0
// Characters/line: 16
lcd_init(16);

 while (1)
 {
  // Place your code here
  lcd_clear();
  X=get_X();itoa(X,temp);lcd_puts("X:");lcd_puts(temp); 
  Y=get_Y();itoa(Y,temp);lcd_gotoxy(0,1);lcd_puts("Y:");lcd_puts(temp);
  Z=get_Z();itoa(Z,temp);lcd_gotoxy(0,2);lcd_puts("Z:");lcd_puts(temp);
  lcd_gotoxy(0,3);
  if(Y<90)
  {
   lcd_puts("OK");
  }
  else if(Y>90)
  {
   lcd_puts("NOT OK");
  }
  delay_ms(500);
 }
}