/* serial.h backward compatibility */

#ifndef SERIAL_PIN_DDR
 #define SERIAL_PIN_DDR DDRD
 #define SERIAL_PIN_PORT PORTD
 #define SERIAL_PIN_INPUT PIND
 #define SERIAL_PIN_MASK _BV(PD0)
 #define SERIAL_PIN_INTERRUPT INT0_vect
#endif

#ifndef SERIAL_SLAVE_BUFFER_LENGTH
 #define SERIAL_SLAVE_BUFFER_LENGTH MATRIX_ROWS/2
 #define SERIAL_MASTER_BUFFER_LENGTH 1
#endif