Method and device for logic analysis of high-speed serial bus

Abstract

The invention provides a method and a device for the logic analysis of a high-speed serial bus. The method comprises the following steps: receiving a bus signal of the high-speed serial bus; copying the bus signal with a signal shunting module to generate a first signal and a second signal; feeding the first signal back to the high-speed serial bus; and resolving the second signal to acquire parallel data. Through the shunting processing of the signal in the high-speed serial bus, the use of the one path of shunt signal obtain in logic analysis through resolution, and the feedback of the other path of shunt signal to the high-speed serial bus, the method can analyze data transmitted in the high-speed serial bus under a condition of not influencing the data transmission of the high-speed serial bus.

Description

technical field [0001] The invention relates to a high-speed serial bus logic analysis method and device, belonging to the technical field of data communication. Background technique [0002] The interconnection between a central processing unit (Central Process Unit, referred to as CPU) and its peripheral devices often adopts a local bus, such as a peripheral component interconnect standard (Peripheral Component Interconnect, referred to as PCI) local bus. With the advancement of technology, the data transmission speed of the local bus is required to be higher and higher, so the high-speed serial bus was born. The high-speed serial buses that occur at present are varied, and there are non-standardized ones and standardized ones, such as the Peripheral Component High-speed Interconnection Standard (PCI Express, referred to as PCIE) serial bus, and PCIE is a high-speed serial bus standard. High-speed serial buses often have the following characteristics: [0003] (1) The co...

AI Technical Summary

Problems solved by technology

Due to the above three characteristics, the intermediate bus detection device needs to use devices with very good electrical characteristics, at the cost of relatively high cost and complex design

At the same time, since the intermediate bus detection device extracts part of the energy from the bus, it will inevitably affect the signal on the original bus. If the connection is improper, the signal on the original bus may be distorted, resulting in inaccurate testing

In addition, because the intermediate bus detection device is a relatively complex electrical mechanical device with a relatively large volume, in some high-density designs, it is often impossible to reserve space for the intermediate bus detection device

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