#include <avr/io.h>
  #include <avr/interrupt.h>
  #include <util/delay.h>

  #include <string.h>

  #include <stdlib.h>

  #include <stdio.h>
  
  

  #define PRESCALER 1024
  #define TIME_SLOT 20
  #define BAUDRATE	103
  

  //// INIT SERIAL /////

  
  void init_serial(void)
  {
  	/* ACHTUNG : we suppose UBRR value < 0xff */
  	/* Not true in all case */
  	uint8_t baudrate = BAUDRATE;
  	/* Set baud rate */
  	UBRR0H = 0;
  	UBRR0L = baudrate;

  	UCSR0B = (1<<TXEN0);
  	/* Set frame format */
  	UCSR0C = 0x06;
      
  }
  

  //// ENVOI DE MESSAGES /////
  

  void send_serial(unsigned char c)
  {
  	loop_until_bit_is_set(UCSR0A, UDRE0);
  	UDR0 = c;
  }
  
  
  void send_msg2(char Donnee[]){
   
      while (( UCSR0A & (1<<UDRE0))  == 0){};
              
              for (int i = 0; i < strlen(Donnee); i++){ 
                  while (( UCSR0A & (1<<UDRE0))  == 0){};
                  UDR0 = Donnee[i]; 
                  if (i == (strlen(Donnee) - 1)){
                      send_serial('\n');
                      send_serial('\r');
                  }
              } 
  }
  
  void send_msg(char Donnee[]){
          int i=0;
        for(i=0; i<strlen(Donnee); i++){
            if (i==strlen(Donnee)-1){
                send_serial(Donnee[i]);
                send_serial('\n');
                send_serial('\r');
          }
            else{
                send_serial(Donnee[i]);
          } 
          _delay_ms(100);
          }
  }
  

  //////// RETOUR /////////
  void retour(char* show_a){
          send_msg2(show_a);

  }