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avr data for communication sources

//AD7705.c
//ATMEGA 16
//4 Mhz

#include <avr/io.h>
#include <stdlib.h>
#include <avr/pgmspace.h>
#include <avr/interrupt.h>
#include <avr/signal.h>

#include "uart.h"
#include "uart.c"

#ifndef F_CPU
#define F_CPU 4000000UL
#endif
#define UART_BAUD_RATE      9600

int main(void)
{
   //uart initialization
   uart_init( UART_BAUD_SELECT(UART_BAUD_RATE,F_CPU) );
   sei();
   
   //Set MOSI, SS, and SCLK as output MISO and PB0 as input
   DDRB = ((1<<5)|(1<<7)|(1<<4));
   
   //Enable SPI, Select Master, SCLK idles high,
   //Sample on rising edge Setup on falling edge,
   //SCLK=F_CPU/4   
   SPCR = ((1<<SPE)|(1<<MSTR)|(1<<CPOL)|(1<<CPHA));
   
   //Serially reset the Chip
   SPDR = 0xFF;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Serially reset the Chip
   SPDR = 0xFF;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Serially reset the Chip
   SPDR = 0xFF;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Serially reset the Chip
   SPDR = 0xFF;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Serially reset the Chip
   SPDR = 0xFF;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   
   //Send to Comm Reg: Next Write Clk
   SPDR = 0b00100000;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Send to ClkReg: Clock Bits and Update rate
   SPDR = 0b00011000;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Send to Comm Reg: write setup
   SPDR = 0b00010000;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   //Send to Setup: FSYNC, Gain, Conditions, Self Calibration
   SPDR = 0b01000100;
   
   //Wait for transfer
   while(!(SPSR & (1<<SPIF)));
   
   
   unsigned int adc=0;
   unsigned int value = 0;
   unsigned int number=0;
   char buffer[16];
   
   for(;;)
   {
      //Is DDRY pin low/data ready?
      while(PORTB & 0x01);          
      
      //Send to Comm: next read Data
      SPDR = 0b00111000;
      
      //Wait for transfer
      while(!(SPSR & (1<<SPIF)));
      
      //Pump in Garbage
      SPDR = 0;
      
      //Wait for transfer
      while(!(SPSR & (1<<SPIF)));
      
      //Get high byte
      adc = 0;
      adc = SPDR;
      
      //Pump in Garbage
      SPDR = 0;
      
      //Wait for transfer
      while(!(SPSR & (1<<SPIF)));
      
      //get low byte
      value = 0;
      value = SPDR;
      
      //combine high and low byte for 16 bit
      number = 0;
      number = ((adc<<8)+value);
      
            
      itoa(number,buffer,10);      //convert number to string
      uart_puts(buffer);         //send adc string to PC
      uart_putc(0x0D);         //Sends return
      
      
   
   }
   
   
      
   
   

return 0;
}