Method for testing a computer reset device
View Patent ↗A method for testing, in situ and in operation, a reset device for resetting a computer, including an execution sequence and a verification sequence, the execution sequence being executed during the running of the piece of software and including the following steps: incrementing a test counter, storing the test counter in a non-volatile memory, triggering a reset of the computer, the verification sequence being executed when starting the piece of software and including the following steps: reading the test counter from the non-volatile memory, comparing the test counter: if it is equal to its initial value increased by 1, resetting the test counter, and the test result is positive; and if it is greater than its initial value increased by 1, the test result is negative.
1. A method for testing, in situ and in operation, a reset device for resetting a computer, said device running at least one piece of reset software, said computer running at least one piece of control software in order to control a member, comprising an execution sequence and a verification sequence, the execution sequence being executed during the running of the piece of control software and comprising:
incrementing a test counter,
storing the test counter in a non-volatile memory,
triggering a reset of the computer,
the verification sequence being executed when starting the piece of control software and comprising:
reading the test counter from the non-volatile memory,
comparing the test counter: if the test counter is equal to its initial value there is no test result; if the test counter is equal to its initial value increased by 1, resetting the test counter, and the result of the test is positive; and if the value of the test counter is different, creating a “reset” error, and the result of the test is negative,
wherein the execution sequence further comprises:
storing a test indicator in a non-volatile memory,
and the verification sequence further comprises:
verifying the presence of the test indicator in the non-volatile memory, resetting the test counter only if the test indicator is present, and removing the test indicator.
2. The method as claimed in claim 1 , further comprising a preliminary step of verifying a precondition for its execution, said condition being preferably determined according to at least one criterion from among: calendar duration, operating time of the computer and/or number of operating cycles of the member.
3. A method for testing, in situ and in operation, a reset device for resetting a computer, said device running at least one piece of reset software, said computer running at least one piece of control software in order to control a member, comprising an execution sequence and a verification sequence, the execution sequence being executed during the running of the piece of control software and comprising:
incrementing a test counter,
storing the test counter in a non-volatile memory,
triggering a reset of the computer,
the verification sequence being executed when starting the piece of control software and comprising:
reading the test counter from the non-volatile memory,
comparing the test counter: if the test counter is equal to its initial value there is no test result; if the test counter is equal to its initial value increased by 1, resetting the test counter, and the result of the test is positive; and if the value of the test counter is different, creating a “reset” error, and the result of the test is negative,
wherein the execution sequence further comprises:
storing a reset date in a non-volatile memory,
and the verification sequence further comprises:
reading the reset date from the non-volatile memory,
determining a reset duration from the difference between the reset date and the current date, and
comparing the reset duration with a maximum threshold: if the reset duration is greater than the maximum threshold: creating a “duration” error and the result of the test is negative.
4. The method as claimed in claim 3 , further comprising:
turning on at least one warning signal if the result of the test is negative, if the “reset” error is created and/or if the “duration” error is created.
5. A method for testing, in situ and in operation, a reset device for resetting a computer, said device running at least one piece of reset software, said computer running at least one piece of control software in order to control a member, comprising an execution sequence and a verification sequence, the execution sequence being executed during the running of the piece of control software and comprising:
incrementing a test counter,
storing the test counter in a non-volatile memory,
triggering a reset of the computer,
the verification sequence being executed when starting the piece of control software and comprising:
reading the test counter from the non-volatile memory,
comparing the test counter: if the test counter is equal to its initial value there is no test result; if the test counter is equal to its initial value increased by 1, resetting the test counter, and the result of the test is positive; and if the value of the test counter is different, creating a “reset” error, and the result of the test is negative,
wherein the execution sequence further comprises an initial step of:
verifying the state of the member, the other steps of the execution sequence being executed only when the member is inactive.
6. The method as claimed in claim 5 , wherein the member is an internal combustion engine and is inactive when injection is stopped.