CPUCPU on-line emulation debugging method and interface circuit

Abstract

The invention discloses a CPU online simulation debug method and an interface circuit, comprising an independent to-be-debugged circuit board and a simulation board, wherein the independent simulation board is connected with the simulation head of a CPU simulation tool; the simulation tool communicates with an external computer; the simulation board and the to-be-debugged circuit board are provided with inserting interfaces matched with each other; the signal pins of the simulation head are respectively connected with the signal lines of the to-be-debugged circuit board connected with the corresponding pins of a CPU through the inserting interfaces. Through welding the simulation head on the independent simulation board and arranging matched interfaces on a system circuit board and the simulation board, the invention realizes simulation test of a plurality of system circuit board through a single simulation board; therefore, the invention avoids the damage caused by the welding and taking off of the simulation head to reduce development cost and increase labor efficiency.

Description

technical field [0001] The invention belongs to the technical field of simulation debugging, and in particular relates to an interface circuit design for online simulation debugging of a CPU. Background technique [0002] The development of the TV system requires the joint operation of hardware and control software. Once the hardware platform and software framework are available, it needs to be debugged step by step. Each type of CPU has its own corresponding simulation debugging tool to facilitate online simulation debugging directly. This method does not need to solder the CPU chip on the circuit board during the simulation debugging stage, but only needs to simulate the CPU work online through the simulation tool. After the debugging is completed, the perfect processing software is implanted into the CPU, and then the CPU chip It is really welded to the decoder board to complete the whole work of the TV system. Using this emulation debugging method can effectively prote...

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems in the prior art that the emulation head is directly welded on the circuit board during the CPU emulation debugging test, it is easy to cause damage when the emulation head is removed and the cost of replacing the emulation head is high, and a new type of CPU online The simulation debugging method and interface circuit, by welding the simulation head on a separate simulation board, and setting the mutual matching interface on the system circuit board and the simulation board, thus realizing the simulation test of multiple system circuit boards through one simulation board , effectively avoiding the damage caused by the removal of the dummy head welding, reducing the development cost and improving labor efficiency

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