A kind of indicator lamp control method and fpga

Abstract

The invention discloses an indicating lamp control method and an FPGA (field programmable gate array). The method comprises the steps that when a state machine is in an idle state and a flow passes through any port in the FPGA, the FPGA generates one group of first periodic operation codes corresponding to all ports; the FPGA sends the first periodic operation codes to a CPLD (complex programmable logic device) so that the CPLD turns on indicting lamps corresponding to ports with the flow rate according to the first periodic operation codes, and in addition, the closed state of indicating lamps corresponding to ports without the flow rate is maintained. When the indicating lamp control method and the FPGA are adopted, only one pin is needed between the FPGA and the CPLD, and the effect of turning on or turning off the indicating lamps through CPLD control via the FPGA can be realized, so the pin resource is saved, the system cost is reduced, meanwhile, because the state machine and the CPLD only work when the flow passes through the ports, when no flow passes through the ports, both the state machine and the CPLD can be in a dormant state, and the energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to an indicator light control method and FPGA. Background technique [0002] There are more and more high-density and large-capacity devices in today's communication networks, and 24*1GE or 48*1GE devices are widely used. Usually the designer needs to use the LED lights on the panel to turn on, off or flash to indicate the working status of each port. For example, when the continuous data flow passes through, it blinks at a frequency visible to the naked eye. Generally, it is selected at about 10Hz, that is, it blinks once every 100ms, that is, it needs to be turned on and off once every 100ms, a total of 2 operations. [0003] The conventional method of ASIC is to directly drive the LED lights attached to the corresponding ports when processing data traffic, and each LED light needs to occupy a chip pin. The lighting function itself is not complicated and occupies few inter...

AI Technical Summary

Problems solved by technology

[0005] Although the above technical solution has greatly reduced the number of pins compared to before, it still needs 3 pins, which increases the system cost, and even if there is no need to turn on or off the indicator light, it still needs to periodically send relevant information, increasing energy consumption

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