AVR Freaks

My Last Edit :

I Actually Combined the two solution (Adding a .h file to the project , defining the macros before including c files) in a very unprofessional way XD 

Now My code look like this (And it's working just fine ):

main.c

#define F_CPU 8000000UL
#include <avr/io.h>
#include <util/delay.h>
#include <avr/interrupt.h>

//My Virtual .h File : 
  // {
	  
	  // AVR_Hc595
	  #define Ds_Port PORTB
	  #define sh_Port PORTB
	  #define st_Port PORTB

	  #define Ds_pin PB2
	  #define sh_pin PB3
	  #define st_pin PB4
	  
	  #define Latch st_pin_H;st_pin_L;

	  void Shift595(unsigned char _shift_High_Byte,unsigned char _shift_Low_Byte); 

	  // AVR_Usart
	  
	  #define Discard_Receiving_Finishing _upos=0;Finished_Receiving_Text=0;

	  void Usart_Init(unsigned long USART_BAUDRATE);
	  void Usart_Write(char Data2Write);
	  void Usart_Write_Text(char *text_);
	  unsigned char Usart_Read();

	  void int2str(unsigned int d, char* str);
	  void LtrimZeros(char* str);
	  
	  #define Receiver_Array_Length 10 
	  #define _Terminator_Character '/'
	  volatile char  _Receive_Array_[Receiver_Array_Length];
	  volatile unsigned char _upos=0;
	  volatile char Finished_Receiving_Text=0;
	

  // }
		  

// included C files :
#include "AVR_USART.c"
#include "AVR_Hc595.c"

int main(void)
{
	//Usart Init :
	Usart_Init(9600);

	UCSRB |= (1<<RXCIE) ;  // Set Receive complete interrupt enable bit  USART
	
	sei();
	// IO Init
    DDRB=0xff;
	PORTB|=3; _delay_ms(100);
	PORTB&=0; _delay_ms(100);
	
	//Hello word
	Usart_Write('#');
	Usart_Write('\r');
	Usart_Write_Text("AT8 Here !");
	Usart_Write(0x0d);

	Shift595(0,255);
	Latch;
	_delay_ms(100);

}

/* Here are the ISR(USART_RXC_vect){..} Function but i prefer not to post it */

My AVR_Hc595.c :

// Important :

// Add Those to your general .h file :
/****************************************
// AVR_Hc595
#define Ds_Port PORTB
#define sh_Port PORTB
#define st_Port PORTB

#define Ds_pin PB2
#define sh_pin PB3
#define st_pin PB4
	  
#define Latch st_pin_H;st_pin_L;

void Shift595(unsigned char _shift_High_Byte,unsigned char _shift_Low_Byte);

*******************************************/
#define Ds_pin_H Ds_Port|= (1<<Ds_pin);
#define Ds_pin_L Ds_Port&=~ (1<<Ds_pin);

#define sh_pin_H sh_Port|= (1<<sh_pin);
#define sh_pin_L sh_Port&=~ (1<<sh_pin);

#define st_pin_H st_Port|= (1<<st_pin);
#define st_pin_L st_Port&=~ (1<<st_pin);


void Shift595(unsigned char _shift_High_Byte,unsigned char _shift_Low_Byte)
{
	char i=8;
	while(i!=0)
	{
		if((_shift_High_Byte&128))Ds_pin_H
		else Ds_pin_L;
		
		sh_pin_H;
		sh_pin_L;
		_shift_High_Byte=_shift_High_Byte<<1;
		i--;
	}
	
	i=8;
	while(i!=0)
	{
		if((_shift_Low_Byte&128))Ds_pin_H
		else Ds_pin_L;
		
		sh_pin_H;
		sh_pin_L;
		_shift_Low_Byte=_shift_Low_Byte<<1;
		i--;
	}
}

and there is my AVR_USART.c  but i prefer not to post it (Because it is written for a specific project (not general ) ).

Just wanted to share it with you guys 

thanks.

the codes in AVR_Hc595.c are only used in my main.c  (and i don't think my project will go any further than that )

I don't see the problem , I can't completely get you (Sorry, Newbie) 

What errors including .c <s> in my main.c will cause now or in future   ?

thanks

I will consider that

I totally understand,
I should say that everything i have done is only for simple projects.

Thanks for Early warning
I appreciate your time