A kind of cpld updating system and method

Abstract

The present application discloses a CPLD update system and method, including: sending an asynchronous reset signal and updating the CPLD when receiving a CPLD update command, and sending a latch enable signal and a power-off restart signal when receiving a CPLD update restart command BMC; the power module that receives the power-off restart signal; the clock signal terminal and the D signal terminal are connected to the output terminal of the power module and receive the D flip-flop of the asynchronous reset signal; the status display unit connected to the D flip-flop; the enable signal A latch that receives a latch enable signal. This application prompts the update status of the CPLD to the outside world through the D flip-flop and the status display unit, and controls the CPLD to restart after the configuration is updated by sending a shutdown and restart signal to the power module through the BMC, and at the same time uses a latch to ensure that the controlled terminal is in the process of updating the CPLD The level of the CPLD is not affected, ensuring that the update of the CPLD can take effect in time, and improving the update efficiency.

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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