Initialization method for fast peripheral component interconnect express interface card

Abstract

The invention provides an initialization method for a fast peripheral component interconnect express interface card. The method includes the following steps: a processing unit uses a first initialization parameter contained by a basic input output system code to initialize a fast peripheral component interconnect express interface card inserted in a fast peripheral component interconnect express interface slot according to the first value preset by a flag by a startup program; the processing unit sets the flag to make the flag have the first value or a second value according to the initializedfast peripheral component interconnect express interface card by the startup program; the processing unit judges whether the initialized fast peripheral component interconnect express interface cardneeds to be reinitialized by the startup program; and when the fast peripheral component interconnect express interface card needs to be reinitialized, the processing unit uses a second initializationparameter contained by the basic input output system code to reinitialize the fast peripheral component interconnect express interface card according to the second value of the set flag.

Description

technical field [0001] The invention relates to an initialization method of a fast peripheral component interconnection interface card. Background technique [0002] Peripheral Component Interconnect Express (PCI Express; PCI-E) interface is one of the computer bus interfaces. It follows the concept and communication standard of the old PCI interface, but the PCI-E interface has a faster transmission speed. For example, the transmission speed of the first-generation PCI-E interface is 2.5 GT / s, the transmission speed of the second-generation PCI-E interface is 5 GT / s, and the transmission speed of the third-generation PCI-E interface, which is quite popular today, has Up to 8 GT / s. [0003] However, as the transmission speed of the PCI-E interface increases, the loss of the PCI-E signal transmitted by the PCI-E interface becomes more serious. Generally, the length of the PCI-E signal can be reduced by limiting the length of the PCI-E signal. Loss, but limiting the length o...

AI Technical Summary

Problems solved by technology

[0003] However, as the transmission speed of the PCI-E interface increases, the loss of the PCI-E signal transmitted by the PCI-E interface becomes more serious. Generally, the length of the PCI-E signal can be reduced by limiting the length of the PCI-E signal. Loss, but limiting the length of the traces will cause layout restrictions on the PCI-E interface card on the motherboard; moreover, another way can be improved by improving the circuit board material of the PCI-E interface card or improving the PCI-E interface plug The materials used in the slots are used to reduce the loss of PCI-E signals, but the use of improved materials will increase the production costs of PCI-E interface cards and PCI-E interface slots

Therefore, in order not to limit the layout of the PCI-E interface card and not increase the production cost, the conventional technology also proposes to adjust the initialization parameters of the PCI-E interface card and replace the unadjusted initialization parameters with the adjusted initialization parameters, hoping to improve the signal. However, the adjustment of initialization parameters can only be done manually, that is, after human judgment is required, it is very inconvenient for engineers to control and adjust initialization parameters; in addition, PCI-E interface cards may be used in different signal transmissions Environment, even if the initialization parameters are adjusted, it is only adjusted for a specific transmission environment and a set of adjusted initialization parameters cannot be applied to other transmission environments. Using initialization parameters that do not match the transmission environment cannot improve the aforementioned signal loss In severe cases, errors will still occur when the PCI-E interface card transmits signals

Images