Hardware breakpoint circuit for debugging program

Abstract

The invention relates to a hardware breakpoint circuit for debugging a program, which comprises: a first breakpoint register which is used for storing condition information of a first breakpoint, a first breakpoint comparator, a second breakpoint register which is used for storing condition information of a second breakpoint, a second breakpoint comparator, a breakpoint control register which is used for controlling the occurrence sequence of the first breakpoint and the second breakpoint, a first coincidence gate, a second coincidence gate, a third coincidence gate which is used for outputting a first breakpoint request signal when information from a second alternation gate and a first breakpoint condition generation signal are both valid, a fourth coincidence gate which is used for outputting a second breakpoint request signal when information from a third alternation gate and a second breakpoint condition generation signal are both valid, and a first alternation gate which is used for transmitting a breakpoint request signal to a microcontroller. The invention realizes that the breakpoint request can not be transmitted when other breakpoints occur until the conditions for one breakpoint occur, thereby greatly facilitating the simulation debugging and shortening the product development cycle.

Description

technical field [0001] The invention relates to the technical field of integrated circuit testing, in particular to a hardware breakpoint circuit for debugging programs. Background technique [0002] Since the 1980s, with the widespread application of computer embedded systems, microcontrollers (MCU, microcontroller unit / single-chip microcomputer) have developed rapidly. The early single-chip microcomputer is a single-chip integrated circuit device of the computer designed according to the requirements of embedded application technology, that is, all the characteristic devices of the electronic computer are integrated on one chip, so it is vividly called a single-chip microcomputer. With the increasing application range of single-chip microcomputers, the requirements for its simulation and debugging functions are also gradually increasing. [0003] The simulation debugging function means that when the program executes to the specified line, or when the preset address or dat...

AI Technical Summary

Problems solved by technology

In the prior art, the online simulation debugging module often configures the relevant breakpoint registers, and can send a breakpoint request as long as a breakpoint condition is detected, which cannot satisfy the flexibility of breakpoint simulation debugging

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