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3 axis atmel code

3 axis atmel code

/*
* Project name:
    3 axis accelerometer sensor
* Copyright
     (c) Researchdesignlab.com
* Description:

* Test configuration:
     MCU:             AT89S52
     Dev.Board:       8051
     Oscillator:      11.0592 MHz
     Software:        Keil uVision3

*/

#include<reg51.h>
#include<string.h>

sbit   SCL   = P1^7;
sbit   SDA   = P1^6;



#define LCD_PORT P2                    // LCD D0-D7 PINS connected P2
sbit rs=P3^5;                        // LCD RS PIN connected P3.5
sbit en=P3^7;                       // LCD EN PIN connected P3.7
sbit D7=P2^7;
sbit rw=P3^6;

void busy();
void CMD_WRT(unsigned char);
void LCD_WRT(unsigned char *);
void DATA_WRT(unsigned char);
void delay(unsigned int time);

void CONVERT_DISPLAY(unsigned int );
void i2c_delay(void);
void i2c_start(void);
void i2c_stop(void);
void i2c_wbyte(char i2c_wb);
unsigned char i2c_rbyte(void);
char i2c_ack(void);
void i2c_nack(void);
void i2c_read(unsigned char id,unsigned char add,unsigned char d[]);

void DELAY();

void main()
{
unsigned char ADC0,ADC1,ADC2;
unsigned char d[4];

   unsigned char CMD[]={0x38,0x01,0x0f,0x06,0x80},TEMP,i;



      for(i=0;i<5;i++)
   {
    TEMP=CMD[i];
   CMD_WRT(TEMP);
   }



for(i=0;i<10;i++)
   DELAY();
while(1)
{



       i2c_read(0x9E,0x41,&d[0]);
       ADC0 = d[0];
       DELAY();
       i2c_read(0x9E,0x42,&d[1]);
       ADC1 = d[1];
       DELAY();
       i2c_read(0x9E,0x43,&d[2]);
       ADC2 = d[2];
       DELAY();

      CMD_WRT(0X01);
      CMD_WRT(0X80);
      LCD_WRT("X=");
      CMD_WRT(0X83);
      CONVERT_DISPLAY(ADC0);

      CMD_WRT(0X87);
      LCD_WRT("Y=");
      CMD_WRT(0X8D);
      CONVERT_DISPLAY(ADC1);

      CMD_WRT(0XC0);
      LCD_WRT("Z=");
      CMD_WRT(0XC3);
      CONVERT_DISPLAY(ADC2);

               DELAY();

}

}

void DELAY()
{
unsigned int X=8000,Y=100;
while(X--);
while(Y--);

}

void CONVERT_DISPLAY(unsigned int d)
{

   unsigned char dig1,dig2,dig3,dig[3];
   unsigned char x;
   unsigned char temp;
   temp=d;
   temp=temp/10;
   dig1=d%10;
   dig2=temp%10;
   dig3=temp/10;


   dig[0]=dig3;
   dig[1]=dig2;
   dig[2]=dig1;


   for(x=0;x<3;x++)
   {
   temp=dig[x]|0x30;

       DATA_WRT(temp);
    }

}

void i2c_delay(void)
{
   char a;
   for(a=0;a<20;a++);
}

//------------------------------------------ I2C START --------------------------------------------//

void i2c_start(void)
{

   SCL = 1;
   i2c_delay();
   SDA   = 1;
   i2c_delay();
   SDA   = 0;
   i2c_delay();
   SCL = 0;
   i2c_delay();
}

//------------------------------------------- I2C STOP --------------------------------------------//

void i2c_stop(void)
{
   SDA   = 0;
   i2c_delay();
   SCL   = 1;
   i2c_delay();
   SDA = 1;
   i2c_delay();//
   SCL = 0;   //
}

//---------------------------------------- I2C WRITE BYTE -----------------------------------------//

void i2c_wbyte(unsigned char i2c_wb)
{
   char a;

   for(a=0;a<8;a++)                               // Send 8 bits
   {
       SCL = 0;
       i2c_delay();
       if(i2c_wb & (0x80 >> a))
       {
           SDA = 1;
       }
       else
       {
           SDA = 0;
       }
       i2c_delay();
       SCL   = 1;
       i2c_delay();
   }

}

//----------------------------------------- I2C READ BYTE -----------------------------------------//

unsigned char i2c_rbyte(void)
{
   char a;
   unsigned char b;
   b=0;

   for(a=0;a<8;a++)
   {
       SCL = 1;
       i2c_delay();
       if(SDA)
       {
           b |= (0x80 >> a);
       }
       i2c_delay();
       SCL   = 0;
       i2c_delay();
   }
   return(b);
}

//-------------------------------------------- I2C ACK --------------------------------------------//

char i2c_ack(void)
{
   char a;

   i2c_delay();
   SCL   = 0;
   i2c_delay();
   SDA   = 1;
   i2c_delay();
   SCL = 1;
   i2c_delay();

   i2c_delay();
   a = SDA;
   i2c_delay();
   SCL = 0;
   i2c_delay();
   return(a);
}

//------------------------------------------- I2C NACK --------------------------------------------//

void i2c_nack(void)
{

   SDA   = 1;
   i2c_delay();
   SCL   = 1;
   i2c_delay();
   SCL = 0;
   i2c_delay();
}

//-------------------------------------------- I2C Read -------------------------------------------//

void i2c_read(unsigned char id,unsigned char add,unsigned char d[])
{

   i2c_start();
   i2c_wbyte(id);
   i2c_ack();
   i2c_wbyte(add);
   i2c_ack();
   i2c_start();
   i2c_wbyte(0x9f);
   i2c_ack();
   *d = i2c_rbyte();
   //i2c_ack();
   i2c_nack();
   i2c_stop();

}

void busy()
{
   D7=1;
   rs=0;
   rw=1;
   while(D7!=0)
   {
       en=0;
       en=1;
   }
}

void CMD_WRT(unsigned char val)
{
   busy();                                           ;

   LCD_PORT=val;
   rs=0;
   rw=0;
   en=1;
   en=0;
}

void LCD_WRT(unsigned char *string)
{
   while(*string)
       DATA_WRT(*string++);
}
void DATA_WRT(unsigned char ch)
{
   busy();
   LCD_PORT = ch;
   rs=1;
   rw=0;
   en=1;
   en=0;
}