#include <avr/io.h>
#define F_CPU 8000000UL //8MHz
#include <util/delay.h>
#include <avr/interrupt.h>

uint8_t receive = 0;
uint8_t rx_data = 0;
volatile uint8_t rx_flag = 0;

void UARTInit(void) {
   UBRRH = 0;
   UBRRL = 51;
   UCSRB = (1<<RXEN)|(1<<TXEN)|(1<<RXCIE);
   UCSRC = (1<<URSEL)|(1<<UCSZ1)|(1<<UCSZ0);
}

//void UARTSend(uint8_t data) {
//   while(!(UCSRA & (1<<UDRE)));
//   UDR = data;
//}

unsigned char UARTGet() {
   while(!rx_flag);
   rx_flag = 0;
   return rx_data;
}

int main(void) {
   DDRC = 0b00000001;
   sei();
   UARTInit();
   while(1) {
      receive = UARTGet();
      if(receive == 0b00110001)
      {
         PORTC = 0b00000001;
      }
            if(receive == 0b00110010)
            {
               PORTC = 0b00000000;
            }
   }
}

ISR(USART_RXC_vect) {
   rx_data = UDR;
   rx_flag = 1;
}

ISR(USART_RXC_vect) {
   rx_data = UDR;
   rx_flag = 1;
}

//----------
void _Print_Buf (u08 x, char __flash *data);
#define Print_Buf(x, data) _Print_Buf(((x)-1), (data))
//----------

//==================
void _Print_Buf (u08 x, char __flash *data)
{
   for (u08 i = 0; data [i] != 0;)
   {
      dsp_buf [x++] = data [i++];
   }

//   init_dsp_buf ();
}
//==================

//==================
struct msg_cmd __flash table_msg_cmd [] =
{
   {"CH1",     KEY_ESC_COD},
   {"CH2",     KEY_ENTER_COD},
   {"CH3",     TEST_CMD},
   {NULL_TEXT, NULL_CMD},
};

u08 select_cmd (void)
{
   struct msg_cmd __flash *ptr = table_msg_cmd;

   while (ptr -> msg)
   {
      char __flash *ptr_2 = ptr -> msg;

      for (u08 i = 0; i < mirf_PAYLOAD; i++)
      {
         if (!ptr_2 [i]) return ptr -> cmd;

         if (ptr_2 [i] != mirf_buf [i]) break;
      }

      ptr++;
   }

   return false;
}

bool select_msg (u08 a)
{
   struct msg_cmd __flash *ptr = table_msg_cmd;

   for (; ptr -> msg; ptr++)
   {
      if (a == ptr -> cmd)
      {
         print_buf (mirf_buf, 1, ptr -> msg);
         return true;
      }
   }

   return false;
}
//==================

//----------
void _Print_Buf (u08 x, char __flash *data);
#define Print_Buf(x, data) _Print_Buf(((x)-1), (data))
//----------

//==================
void _Print_Buf (u08 x, char __flash *data)
{
   for (u08 i = 0; data [i] != 0;)
   {
      dsp_buf [x++] = data [i++];
   }
}
//==================

   Print_Buf (2, 12, "Ваш текст");