END-TO-END PROTECTION METHOD
The present disclosure provides an electronical device adapted to execute a communication via a communication bus, and comprising a hardware component, different from a processor, and able to execute directly an end-to-end protection method of the communication, the hardware component being capable of management states of the electronical device, wherein: when the communication starts and the device receives a first message that is validated by the end-to-end protection method, the state of the electronical device changes from a no monitoring state to a initialization state; and when the device receives a specific second message, the state of the electronical device changes from a the initialization state to a monitoring state.
1 . An electronical device adapted to execute a communication via a communication bus, and comprising a hardware component, different from a processor, and able to execute directly an end-to-end protection method of the communication, the hardware component being capable of managing states of the electronical device;
wherein when the communication starts and the device receives a first message that is validated by the end-to-end protection method, a state of the electronical device changes from a no monitoring state to a initialization state; and
wherein when the device receives a specific second message, the state of the electronical device changes from a the initialization state to a monitoring state.
2 . The electronical device of claim 1 , wherein the second specific message comprises a command that sets a configuration bit of the electronical device.
3 . The electronical device of claim 1 , wherein, when the electronic device is in the initialization state or in the monitoring state, if an error counter of the end-to-end protection method reaches limit value, the electronical device goes back to the no monitoring mode.
4 . The electronical device of claim 3 , wherein, when the device is in the no monitoring state, the error counter of the end-to-end protection method can be read and/or cleared.
5 . The electronical device of claim 1 , wherein, when the device is in the no monitoring state, all received messages are send to the device by the end-to-end protection method.
6 . The electronical device of claim 1 , wherein the first message and the specific second message comprise a control field data.
7 . The electronical device of claim 6 , wherein, when the device is in the no monitoring state, a verification method of the control field data, the verification method being comprised in the end-to-end protection method, is not executed at each reception of a message.
8 . The electronical device of claim 6 , wherein, when the device is in the initialization state, a verification method is executed at each reception of a message.
9 . The electronical device of claim 6 , wherein, when the device is in the monitoring state, a verification method is executed at each reception of a message.
10 . The electronical device of claim 1 , wherein the communication bus is a controller area network bus.
11 . The electronical device of claim 1 , wherein the communication bus is a controller area network flexible data-rate bus.
12 . The electronical device of claim 11 , wherein the communication bus is a known under a trade name “controller area network flexible data-rate light bus”.
13 . The electronical device of claim 11 , wherein the communication bus is a known under a trade “name controller area network flexible data-rate XL bus”.
14 . The electronical device of claim 1 , wherein the hardware component is a finite-state-machine.
15 . A method for managing states of an electronical device adapted to execute a communication via a communication bus, the method being executed directly by a hardware component of the electronical device different from a processor, and able to execute directly an end-to-end protection method of the communication, wherein the method for managing states comprises:
when the communication starts and the device receives a first message that is validated by the end-to-end protection method, a state of the electronical device changes from a no monitoring state to an initialization state; and
when the device receives a specific second message, the state of the electronical device changes from a the initialization state to a monitoring state.
16 . The method for managing states of claim 15 , wherein the second specific message comprises a command that sets a configuration bit of the electronical device.
17 . The method for managing states of claim 15 , wherein, when the electronic device is in the initialization state or in the monitoring state, if an error counter of the end-to-end protection method reaches limit value, the electronical device goes back to the no monitoring mode.
18 . The method for managing states of claim 17 , wherein, when the device is in the no monitoring state, the error counter of the end-to-end protection method can be read and/or cleared.
19 . The method for managing states of claim 15 , wherein, when the device is in the no monitoring state, all received messages are send to the device by the end-to-end protection method.
20 . The method for managing states of claim 15 , wherein the first message and the specific second message comprise a control field data.