###################################################  main.c


#include <avr/io.h>
#include "stdlib.h"
#include "intern_adc.h"			// intern_ADC-Funktionen
#include "ad7305.h"				// DAC-Funktionen




int main(void)
{
unsigned char sin_table[255] = 
{
0x7F,0x82,0x85,0x88,0x8B,0x8E,
0x91,0x94,0x97,0x9B,0x9E,0xA1,0xA4,0xA7,0xAA,0xAD,
0xAF,0xB2,0xB5,0xB8,0xBB,0xBE,0xC0,0xC3,0xC6,0xC8,
0xCB,0xCD,0xD0,0xD2,0xD4,0xD7,0xD9,0xDB,0xDD,0xDF,
0xE1,0xE3,0xE5,0xE7,0xE9,0xEA,0xEC,0xEE,0xEF,0xF0,
0xF2,0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,
0xFB,0xFC,0xFC,0xFD,0xFD,0xFD,0xFD,0xFD,0xFD,0xFD,
0xFD,0xFD,0xFD,0xFC,0xFC,0xFB,0xFB,0xFA,0xF9,0xF8,
0xF7,0xF6,0xF5,0xF4,0xF3,0xF2,0xF0,0xEF,0xEE,0xEC,
0xEA,0xE9,0xE7,0xE5,0xE3,0xE1,0xDF,0xDD,0xDB,0xD9,
0xD7,0xD4,0xD2,0xD0,0xCD,0xCB,0xC8,0xC6,0xC3,0xC0,
0xBE,0xBB,0xB8,0xB5,0xB2,0xAF,0xAD,0xAA,0xA7,0xA4,
0xA1,0x9E,0x9B,0x97,0x94,0x91,0x8E,0x8B,0x88,0x85,
0x82,0x7F,0x7B,0x78,0x75,0x72,0x6F,0x6C,0x69,0x66,
0x62,0x5F,0x5C,0x59,0x56,0x53,0x50,0x4E,0x4B,0x48,
0x45,0x42,0x3F,0x3D,0x3A,0x37,0x35,0x32,0x30,0x2D,
0x2B,0x29,0x26,0x24,0x22,0x20,0x1E,0x1C,0x1A,0x18,
0x16,0x14,0x13,0x11,0xF,0xE,0xD,0xB,0xA,0x9,
0x8,0x7,0x6,0x5,0x4,0x3,0x2,0x2,0x1,0x1,
0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,0x0,
0x1,0x1,0x2,0x2,0x3,0x4,0x5,0x6,0x7,0x8,
0x9,0xA,0xB,0xD,0xE,0xF,0x11,0x13,0x14,0x16,
0x18,0x1A,0x1C,0x1E,0x20,0x22,0x24,0x26,0x29,0x2B,
0x2D,0x30,0x32,0x35,0x37,0x3A,0x3D,0x3F,0x42,0x45,
0x48,0x4B,0x4E,0x50,0x53,0x56,0x59,0x5C,0x5F,0x62,
0x66,0x69,0x6C,0x6F,0x72,0x75,0x78,0x7B,0x7F,0x82
};

unsigned int	adc_value16,diff_value16,half_adc=512;
unsigned char	test8=0,half8=127,adc8=0,diff8=0;
unsigned char	vor=0,rueck=0,mark=2,schritt=0;


 ad7305_init();					// DAC INIT PORTs und Grundstellung
 intern_adc_init(CH0);			// internen ADC auf Kanal 0 einstellen
 
  //adc_value = getConversion_intern_adc();		// eine ADC-Wandlung 10bit
  //dac_value = (unsigned char)(adc_value>>2);	// 10bit => 8bit schieben
  //ad7305_one(A, dac_value); 						// DAC-einstellen 8bit
  

 for(;;)
 {
  adc_value16 = getConversion_intern_adc();		// eine ADC-Wandlung 10bit
  adc8 = (unsigned char)(adc_value16>>2);								// 10bit zu 8bit
  
 /*if(adc8 >= half8) 					// Vorwärtsbewegung
  {
   //diff8 = (adc8 & 0x7F);	// Differenz bilden   0xXX & 0x7F(127er löschen)
   
	//test8 += (diff8>>2);
	
	vor = vor + 1;
	
   ad7305_one(D, sin_table[vor]); 			// DAC-einstellen 8bit

   ad7305_one(C, sin_table[vor+63]); 		// DAC-einstellen 8bit

   ad7305_one(B, sin_table[vor+127]); 	// DAC-einstellen 8bit
 
   ad7305_one(A, sin_table[vor+191]); 	// DAC-einstellen 8bit
 }*/


if(adc8 < half8)					// Vorwärtsbewegung
  {
   diff8 = (half8 - adc8);			// Differenzbilden + umkehren
   	
	test8 = (adc8>>3)+1;
   
   rueck += test8;
  
   ad7305_one(D, sin_table[rueck]); 			// DAC-einstellen 8bit

   ad7305_one(C, sin_table[64 + rueck]); 			// DAC-einstellen 8bit

   ad7305_one(B, sin_table[128 + rueck]); 				// DAC-einstellen 8bit

   ad7305_one(A, sin_table[192 + rueck]); 					// DAC-einstellen 8bit


  }
 
 }




###################################################   ad7305.h

#ifndef intern_adc_H
#define intern_adc_H


// ###################  DEFINES


#define DACPORTDIR		DDRB		// DAC Datenrichtungsregister
#define DACPORT			PORTB		// DAC Port
#define DACPIN				PINB		// DAC Pin

#define DAC_CONPORTDIR	DDRD		// DAC Kontrollport-Datenrichtung
#define DAC_CONPORT		PORTD		//	DAC KontrollPort
#define DAC_CONPIN		PIND		// DAC KontrollPin



#define A					0x00		// DAC - Adresse A
#define B					0x01		// DAC - Adresse B
#define C					0x02		// DAC - Adresse C
#define D					0x03		// DAC - Adresse D

#define WR					5
#define LDAC				        6

// ################### INITIALISIERUNGEN


void ad7305_init(void);															// DAC Init

void ad7305_one(unsigned char kanal, unsigned char daten);			// schreibt Daten
																						// auf einen Kanal
																						
#endif


###################################################   ad7305.c

#include <avr/io.h>
#include "stdlib.h"
#include "ad7305.h"

void ad7305_init(void)
{
 DACPORTDIR 	 = 0xFF;			// DACPORT alles Ausgänge
 DAC_CONPORTDIR = 0x63;			// WR LDAC A0 A1 = Ausgänge (PD0,PD1,PD5,PD6)

 DACPORT			 = 0x00;			// Spannungswert = NULL
 DAC_CONPORT	 = 0x63;			// Adresse auf Kanal A  + WR & LDAC = High
 
 
}


void ad7305_one(unsigned char kanal, unsigned char daten)
{

 DAC_CONPORT = (DAC_CONPORT & 0xFC) | kanal; 			// Adresse einstellen (A,B,C oder D)
 asm("nop");
 asm("nop");

 DACPORT = daten;							// Daten an den Port legen
 
 asm("nop");
 asm("nop");
 
 cbi(DAC_CONPORT,WR);					// WR-Bit LOW
  asm("nop");
  asm("nop");
 sbi(DAC_CONPORT,WR);					// WR-Bit HIGH
 
 cbi(DAC_CONPORT,LDAC);
  asm("nop");
  asm("nop");
 sbi(DAC_CONPORT,LDAC);					// LDAC toggeln um DAC-Wert auszugeben
 
}