-#define SERIAL_BAUD 1200
-
-#define SERIAL_RXD_DDR DDRD
-#define SERIAL_RXD_PORT PORTD
-#define SERIAL_RXD_PIN PIND
-#define SERIAL_RXD_BIT 2
-#define SERIAL_RXD_VECT INT2_vect
-#define SERIAL_RXD_INIT() do { \
+#define SERIAL_SOFT_BAUD 1200
+#define SERIAL_SOFT_PARITY_NONE
+#define SERIAL_SOFT_BIT_ORDER_LSB
+#define SERIAL_SOFT_LOGIC_NEGATIVE
+/* RXD Port */
+#define SERIAL_SOFT_RXD_ENABLE
+#define SERIAL_SOFT_RXD_DDR DDRD
+#define SERIAL_SOFT_RXD_PORT PORTD
+#define SERIAL_SOFT_RXD_PIN PIND
+#define SERIAL_SOFT_RXD_BIT 2
+#define SERIAL_SOFT_RXD_VECT INT2_vect
+/* RXD Interupt */
+#ifdef SERIAL_SOFT_LOGIC_NEGATIVE
+/* enable interrupt: INT2(rising edge) */
+#define INTR_TRIG_EDGE ((1<<ISC21)|(1<<ISC20))
+#else
+/* enable interrupt: INT2(falling edge) */
+#define INTR_TRIG_EDGE ((1<<ISC21)|(0<<ISC20))
+#endif
+#define SERIAL_SOFT_RXD_INIT() do { \