Driver assistance system having controller and controlling method thereof
The present disclosure relates to a driver assistance system having a controller and a method of controlling the driver assistance system. The driver assistance system may include: at least one sensor; a driving device configured to be controlled on the basis of a sensing result by the sensor; and a controller configured to control the driving device by providing a control signal generated on the basis of information from the sensor, and to determine a point to read information from the sensor in response to an event signal based on a predetermined condition provided from the sensor. Accordingly, it is possible to quickly obtain information with small load, thereby effectively controlling the system.
1. A controller comprising:
a sub-controller configured to control an external driving device by providing a control signal generated on the basis of information from at least one sensor, and to determine a point to read information from the sensor in response to an event signal based on a predetermined condition provided from the sensor,
wherein the sub-controller operates in one of an interrupt mode in which the sub-controller reads information from the sensor in real time and a polling mode in which the sub-controller periodically reads information from the sensor in accordance with a predetermined polling period.
2. The controller of claim 1 , wherein the sub-controller operates in the interrupt mode when the event signal is input from the sensor.
3. The controller of claim 2 , wherein the event signal is a signal that is generated in an emergency in which the driving device should be controlled in real time.
4. The controller of claim 1 , wherein the sub-controller operates in the interrupt mode when an initial access signals is input from the sensor.
5. The controller of claim 1 , wherein the sub-controller operates in the polling mode while the event signal is not input from the sensor.
6. The controller of claim 5 , wherein the sub-controller changes a start point of the polling period with reference to a point when the sub-controller reads information from the sensor in real time in response to the input event signal.
7. A driver assistance system comprising:
at least one sensor;
a driving device configured to be controlled on the basis of a sensing result by the sensor; and
a controller configured to control the driving device by providing a control signal generated on the basis of information from the sensor, and to determine a point to read information from the sensor in response to an event signal based on a predetermined condition provided from the sensor,
wherein the controller operates in one of an interrupt mode in which the sub-controller reads information from the sensor in real time and a polling mode in which the sub-controller periodically reads information from the sensor in accordance with a predetermined polling period.
8. The system of claim 7 , wherein the controller operates in the interrupt mode when the event signal is input from the sensor.
9. The system of claim 7 , wherein the event signal is a signal that is generated in an emergency in which the driving device should be controlled in real time.
10. The system of claim 7 , wherein the controller operates in the interrupt mode when an initial event signal is input from the sensor.
11. The system of claim 7 , wherein the controller operates in the polling mode while the event signal is not input from the sensor.
12. The system of claim 11 , wherein the controller changes a start point of the polling period with reference to a point when the controller reads information from the sensor in real time in response to the input event signal.
13. A method of controlling a driver assistance system, the method comprising:
receiving a signal from at least one sensor;
determining whether information sensed by the sensor satisfies a predetermined condition in response to the signal;
reading the information in real time when the information satisfies the condition, and waiting a predetermined period and then reading the information when the information does not satisfy the condition; and
controlling an external driving device by providing a control signal generated by processing the information to the driving device.
14. The method of claim 13 , wherein the determining includes determining whether an event signal that is generated in an emergency, in which the driving device should be controlled in real time, is input from the sensor, and
the reading of information includes reading information from the sensor in real time when the event signal is input.
15. The method of claim 13 , wherein the determining includes determining whether an initial access signal is input from the sensor, and
the reading of information includes reading information from the sensor in real time when the initial access signal is input.
16. The method of claim 13 , wherein further comprising changing a point when information is read into a start point of the period, when the information is read in real time from the sensor in the reading of information.