Controller and control program updating method
AssigneeDENSO TEN Limited
InventorsNaoto Mori, Shigeto Umeyama
Life of this patent
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Abstract
A controller according to an embodiment includes a main processing unit and a monitoring unit. The main processing unit executes a control program. The monitoring unit monitors the main processing unit by a first monitoring method for transmitting, to the main processing unit, a transmission content corresponding to a question and for evaluating an answer to the question from the main processing unit. The main processing unit causes, when receiving an updating request of the control program, the monitoring unit to perform switching from the first monitoring method into a second monitoring method for monitoring a watchdog signal of the main processing unit.
Claims6
A controller comprising:
- a main processing unit that executes a control program;
- and
- a monitoring unit that switches a monitoring method between a first monitoring method and a second monitoring method to monitor the main processing unit where the monitoring unit transmits, in the first monitoring method, a question to evaluate an answer from the main processing unit in response to the question, and monitors, in the second monitoring method, a watchdog signal periodically transmitted from the main processing unit, wherein
- the monitoring unit monitors the main processing unit in the first monitoring method during execution of the control program, and
- when the main processing unit receives an updating request of the control program, the monitoring unit switches a monitoring method from the first monitoring method into the second monitoring method to monitor the main processing unit.
A control program updating method to be performed by a controller,
- the controller including:
- a main processing unit that executes a control program;
- and
- a monitoring unit that switches a monitoring method between a first monitoring method and a second monitoring method to monitor the main processing unit where the monitoring unit transmits, in the first monitoring method, a question to evaluate an answer from the main processing unit in response to the question, and monitors, in the second monitoring method, a watching signal periodically transmitted from the main processing unit, and
- the control program updating method comprising:
- causing the monitoring unit to monitor the main processing unit in the first monitoring method during execution of the control program;
- and
- causing, when the main processing unit receives an updating request of the control program, the monitoring unit to switch a monitoring method from the first monitoring method into the second monitoring method to monitor the main processing unit.
Dependencies are inferred from the claim text.