main.c

#define NEW_BYTE_HANDLER handle_data
#include "serial-tiny10.h"

int main(){
  serial_setup();
  
  //Set debug pin as output
  DDRA |= _BV(1);

	while(1){
	}
	return 0;
}

void handle_data(uint8_t data){
	//Toggle the debug line every time you get an ASCII 1
	if (data == '1'){
		PORTA ^= _BV(1);
	}
}