Update portserial_m.c
sorry, miss out other two parts.
@@ -130,12 +130,16 @@ void vMBMasterPortSerialEnable(BOOL xRxEnable, BOOL xTxEnable)
/* enable RX interrupt */
serial->ops->control(serial, RT_DEVICE_CTRL_SET_INT, (void *)RT_DEVICE_FLAG_INT_RX);
/* switch 485 to receive mode */
+#if defined(RT_MODBUS_MASTER_USE_CONTROL_PIN)
rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_LOW);
+#endif
}
else
{
/* switch 485 to transmit mode */
+#if defined(RT_MODBUS_MASTER_USE_CONTROL_PIN)
rt_pin_write(MODBUS_MASTER_RT_CONTROL_PIN_INDEX, PIN_HIGH);
+#endif
/* disable RX interrupt */
serial->ops->control(serial, RT_DEVICE_CTRL_CLR_INT, (void *)RT_DEVICE_FLAG_INT_RX);
}
