CPLD updating system and method

Abstract

The invention discloses a CPLD updating system and method, and the system comprises a BMC which transmits an asynchronous reset signal and updates a CPLD when a CPLD updating instruction is received,and transmits a latch enable signal and a power-off restart signal when a CPLD updating restart instruction is received; a power supply module which is used for receiving the power-off restart signal;a D trigger, wherein the clock signal end and the D signal end of the D trigger are connected with the output end of the power supply module and receive an asynchronous reset signal; a state displayunit which is connected with the D trigger; and a latch, wherein the enable signal end of the latch receives and latches the enable signal. The updating state of the CPLD is prompted to the outside through the D trigger and the state display unit; the BMC sends the power-off restart signal to the power supply module to control the CPLD to be restarted after configuration updating, meanwhile, the latch is used for ensuring that the level of the controlled terminal is not affected in the CPLD updating process, it is ensured that updating of the CPLD can take effect in time, and the updating efficiency is improved.

Description

technical field [0001] The invention relates to the field of server hardware, in particular to a CPLD update system and method. Background technique [0002] On the mainboard of the server, CPLD (Complex Programmable Logic Device, complex programmable logic device) chips are often integrated to realize related functions such as power-on and power-off sequence control, key debounce, signal delay, and indicator light control. Due to the introduction of new functions, the repair of legacy problems, etc., it is necessary to update the CPLD when the server is running. Integrated Circuit (integrated circuit bus) signal is connected to CPLD to update the configuration of CPLD. [0003] There are two main modes for updating the CPLD. In the first mode, the configuration information takes effect immediately after the configuration is updated. In the second mode, the configuration information is stored in the built-in flash of the CPLD and takes effect after the next power-on. The d...

AI Technical Summary

Problems solved by technology

The disadvantage of the first mode is that when the CPLD is updated in the power-on state, the output level of the CPLD interface may change, which may have a negative impact on the system function

The second mode avoids this problem, but needs to be restarted to re-power the CPLD for the configuration to take effect

Sometimes the server is running business, and it is inconvenient to restart the operation. When the server is in a non-business state, the staff will restart it.

However, the system does not indicate that the server needs to be restarted to make the configuration take effect. If the operator forgets to restart the server, the configuration may not take effect after the CPLD has been updated for a long time because it has not been restarted.

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