Hardware breakpoint circuit used for emulation debugging

Abstract

The invention discloses a hardware breakpoint circuit used for emulation debugging. The circuit comprises a first breakpoint register, a first breakpoint comparator, a second breakpoint register, a second breakpoint comparator, a first breakpoint counter, a first AND gate, a first NOT gate, a second breakpoint counter, a third AND gate, a second NOT gate, a second AND gate, a fourth AND gate and a first OR gate, wherein the first breakpoint register is used for storing first breakpoint condition information; the second breakpoint register is used for storing second breakpoint condition information; the first breakpoint counter is used for setting the times that a first breakpoint condition happens; the second breakpoint counter is used for setting the times that a second breakpoint condition happens; and the first OR gate is used for sending a breakpoint request signal to a microcontroller. The hardware breakpoint circuit can send the breakpoint request signal to the microcontroller after a certain breakpoint condition happens for N times, so that great convenience is brought to the emulation debugging and a product development cycle is shortened.

Description

technical field [0001] The invention relates to the technical field of integrated circuit testing, in particular to a hardware breakpoint circuit for emulation debugging. 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 da...

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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