-#define SERIAL_RXD_INT_ENTER()
-#define SERIAL_RXD_INT_EXIT() do { \
- /* clear interrupt flag */ \
- EIFR = (1<<INTF2); \
+#define SERIAL_SOFT_RXD_READ() (SERIAL_SOFT_RXD_PIN&(1<<SERIAL_SOFT_RXD_BIT))
+/* TXD Port */
+#define SERIAL_SOFT_TXD_ENABLE
+#define SERIAL_SOFT_TXD_DDR DDRD
+#define SERIAL_SOFT_TXD_PORT PORTD
+#define SERIAL_SOFT_TXD_PIN PIND
+#define SERIAL_SOFT_TXD_BIT 3
+#define SERIAL_SOFT_TXD_HI() do { SERIAL_SOFT_TXD_PORT |= (1<<SERIAL_SOFT_TXD_BIT); } while (0)
+#define SERIAL_SOFT_TXD_LO() do { SERIAL_SOFT_TXD_PORT &= ~(1<<SERIAL_SOFT_TXD_BIT); } while (0)
+#define SERIAL_SOFT_TXD_INIT() do { \
+ /* pin configuration: output */ \
+ SERIAL_SOFT_TXD_DDR |= (1<<SERIAL_SOFT_TXD_BIT); \
+ /* idle */ \
+ SERIAL_SOFT_TXD_ON(); \