On-line debugging method for SoC system using HDL to expand serial port

Abstract

The invention provides a method of expanding SoC system online debugging flexibly. During the cause of SoB (System on a Board) and embed system program development, the serial port resource of presexisting IP core is expanded, set the choice, with the convenience of FPGA repeatable arrangement, use can choose debugging mode of target system as his will according to the structure of FPGA simulating board, that is JTAG mode or serial port mode. When choosing serial port mode, the expanded serial port is used, not occupies the serial port resource. When program is debugged, the program can be written into the target memory. So the program debugging mode can be choose flexibly to realize the online debugging, and not occupy the serial port resource of the target system, the debugging efficiency of program is increased.

Description

technical field [0001] The invention relates to the field of embedded MCU simulation systems, in particular to a method for flexibly performing online debugging of software by using an FPGA system. Background technique [0002] With the development of IC design, changes in process and cost, SoC verification has become more and more important, especially the use of FPGA for prototyping has gradually become an indispensable part of successful SoC design. [0003] In the SoC embedded software debugging process including MCU (ARM, 51 single-chip microcomputer), using JTAG debugging is the most commonly used debugging method, JTAG debugging is completely non-intrusive (that is, does not use on-chip resources) debugging, it does not need to occupy the target memory, It does not occupy any port of the target system, and debugs the device through the JTAG boundary scan port of the MCU. Of course, this requires the processor to support JTAG debugging, which is a real-time online in-...

AI Technical Summary

Problems solved by technology

However, if the application needs to use two serial ports at the same time, this kind of debugging cannot be carried out. For example, the developer may use one serial port for 485 communication, and the other serial port to debug infrared devices. In this case, the system cannot be debugged online. , unable to monitor the running status of the software, the status of the MCU internal registers, etc.

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