char calculate_freq(void) {
       
        if (s==125){
          
    		return 'a';
        }
	return 'b';
}



int main (void)
{
	char ReceivedByte;

	UCSR0B = (1 << RXEN0) | (1 << TXEN0);   // Turn on the transmission and reception circuitry
   
    UCSR0C = (1 << UCSZ01) | (1 << UCSZ00); // Use 8-bit character sizes
	
    UBRR0H = (BAUD_PRESCALE >> 8); // Load upper 8-bits of the baud rate value into the high byte of the UBRR register
	UBRR0L = BAUD_PRESCALE; // Load lower 8-bits of the baud rate value into the low byte of the UBRR register

	my_timer_init();
	sei();

	for (;;) // Loop forever
	{
        while ((UCSR0A & (1 << RXC0)) == 0) {}; // Do nothing until data have been received and is ready to be read from UDR
		ReceivedByte = UDR0; // Fetch the received byte value into the variable "ByteReceived"

	ReceivedByte = calculate_freq();
        while ((UCSR0A & (1 << UDRE0)) == 0) {}; // Do nothing until UDR is ready for more data to be written to it
		UDR0 = ReceivedByte; // Echo back the received byte back to the computer

		
	}	
}