Lighting-control processor and method for operating a lighting-control processor
A lighting-control processor ( 100, 300 ) for controlling operation of an external lighting unit comprises an exchange control unit, which is configured to control exchange of lighting-control information with the lighting unit via a lighting-control interface in accordance with an exchange protocol and to generate and provide exchange monitoring information indicative of an operational status of the exchange control unit. A reset unit is configured to receive a soft-reset command and to cause a soft reset of the lighting-control processor upon receiving the soft-reset command. An exchange watchdog unit is configured to receive the exchange monitoring information, determine validity of the exchange monitoring information in accordance with a predefined validity criterion, and to provide the soft-reset command upon detecting that the received exchange monitoring information is not valid.
1. A lighting-control processor for controlling operation of an external lighting unit, the lighting-control processor, comprising
an exchange control unit, which is configured
to control exchange of lighting-control information with the lighting unit via a lighting-control interface in accordance with an exchange protocol; and
to generate and provide exchange monitoring information indicative of an operational status of the exchange control unit;
a reset unit, which is configured to receive a soft-reset command and to cause a soft reset of the lighting-control processor upon receiving the soft-reset command, the soft reset being a reset process under maintained provision of supply power to the lighting control processor and any device connected to the lighting-control processor; and
an exchange watchdog unit, which is configured to receive the exchange monitoring information, determine validity of the exchange monitoring information in accordance with a predefined validity criterion, and to provide the soft-reset command upon detecting that the received exchange monitoring information is not valid.
2. The lighting-control processor of claim 1 , wherein the exchange watchdog unit is configured to determine validity of the received exchange monitoring information by comparing the received exchange monitoring information with predefined template monitoring information, and to provide the soft-reset command if the received exchange monitoring information differs from the template monitoring information.
3. The lighting-control processor of claim 1 , wherein the exchange watchdog unit is additionally configured to provide a watchdog trigger signal, and wherein the exchange control unit is configured to receive the exchange watchdog trigger signal and to generate and provide the exchange monitoring information in response to receiving the exchange watchdog trigger signal.
4. The lighting-control processor of claim 3 , wherein the exchange watchdog unit is additionally configured to provide the soft-reset command in absence of received exchange monitoring information after lapse of a predefined timeout time span measured from providing the exchange watchdog trigger signal.
5. The lighting-control processor of claim 1 , wherein the exchange control unit is configured to control the exchange of the lighting-control information via the lighting-control interface in accordance with an Internet Protocol stack.
6. The lighting-control processor of claim 3 , wherein the exchange watchdog unit is further configured to provide the watchdog trigger signal via the lighting-control interface to a gateway server, which is external to the lighting-control processor, and to receive the exchange monitoring information in the form of gateway exchange monitoring information, determine validity of the gateway exchange monitoring information in accordance with a predefined validity criterion, and to provide the soft-reset command upon detecting that the received gateway exchange monitoring information is not valid.
7. A luminaire comprising at least one lighting unit for generating light and a lighting-control processor according to claim 1 for controlling operation of the at least one lighting unit.
8. The luminaire of claim 7 , further comprising
a supply-power unit, which is connected to the lighting-control processor and which is configured to deliver electrical DC supply power to at least one electrical device including the at least one lighting unit via a plug-in power interface; wherein
the reset unit is configured, when causing the soft reset of the lighting-control processor upon receiving the soft-reset command, to control operation of the supply-power unit so as to keep up delivery of the supply power via the power interface.
9. The luminaire of claim 8 , further comprising a sensor unit, which receives the supply power via the power interface and includes a random-access memory that is configured to lose stored information when reception of the supply power is interrupted.
10. The luminaire according to claim 8 , wherein the reset unit is additionally configured to receive a hard-reset command and to cause a hard reset of the lighting-control processor upon receiving the hard-reset command, and wherein the luminaire is configured to not receive the hard-reset command and the soft-reset command by external user input.
11. A method for operating a lighting-control processor in controlling operation of an external lighting unit, the method comprising
an exchange control process, comprising
controlling exchange of lighting-control information with the lighting unit via a lighting-control interface in accordance with an exchange protocol; and
generating and providing exchange monitoring information indicative of an operational status of the exchange control unit;
a reset control process, comprising
receiving a soft-reset command; and
causing a soft reset of the lighting-control processor upon receiving the soft-reset command, the soft reset being a reset process under maintained provision of supply power to the lighting control processor and any device connected to the lighting-control processor; and
an exchange watchdog process, comprising
receiving the exchange monitoring information;
determining validity of the exchange monitoring information in accordance with a predefined validity criterion; and
providing the soft-reset command to the reset control process upon detecting that the received exchange monitoring information is not valid.
12. The method of claim 11 , wherein
the exchange watchdog process further comprises providing a watchdog trigger signal to the exchange control process; and wherein
the exchange control processes further comprises receiving the exchange watchdog trigger signal and, in response to receiving the exchange watchdog trigger signal, providing the exchange monitoring information.
13. A method for controlling operation of a luminaire, comprising
providing a luminaire comprising at least one lighting unit for generating light and a lighting-control processor for controlling operation of the at least one lighting unit; and
the lighting-control processor controlling operation of the lighting unit of the luminaire in accordance with the method of claim 11 .
14. The method of claim 13 , further comprising
delivering electrical DC supply power from a supply-power unit, which is connected to the lighting-control processor, to at least one electrical device including the at least one lighting unit via a plug-in power interface; and
when causing the soft reset of the lighting-control processor upon receiving the soft-reset command, controlling operation of the supply-power unit so as to keep up delivery of the supply power via the power interface.
15. A computer program for controlling a lighting-control processor in controlling operation of an external lighting unit, the computer program comprising program code for causing the lighting-control processor to carry out the method as defined in claim 11 , when the computer program is run on the lighting-control processor.