Unlock instant, AI-driven research and patent intelligence for your innovation.

Hardware breakpoint circuit for intelligent card simulative debugging system

A debugging system and hardware breakpoint technology, applied in software testing/debugging, electrical digital data processing, instruments, etc., can solve the problems of smart card simulation debugging system constraints, failure to design simulation debugging system, and failure to realize data reading and writing breakpoints, etc. , to achieve the effect of expanding the scope of use

Active Publication Date: 2008-02-13
BEIJING TONGFANG MICROELECTRONICS
View PDF6 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the design of the smart card emulation debugging system is restricted by the emulation CPU. Without a certain type of emulation CPU, it is impossible to design the emulation debugging system corresponding to this model.
Another disadvantage of this method is that limited by the internal resources of the simulated CPU, only single-address program breakpoints can be realized, and multi-address program breakpoints and data read and write breakpoints at arbitrary addresses cannot be realized.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hardware breakpoint circuit for intelligent card simulative debugging system
  • Hardware breakpoint circuit for intelligent card simulative debugging system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Referring to Fig. 1 and Fig. 2, the present invention is placed in the emulation unit of the smart card emulation debugging system, and is connected with the emulation CPU in the emulation unit. The bus and control signals of the simulated CPU are output to the present invention, and the present invention feeds back the breakpoint output signal to the simulated CPU.

[0018] Referring to Fig. 3 and Fig. 4, the hardware breakpoint circuit of the present invention includes a memory for storing breakpoint information, a bus selection circuit, a breakpoint read signal generation circuit and a breakpoint output signal generation circuit. The memory includes parallel address lines, data lines and read-write control lines; the bus selection circuit includes one or more multiplexers; the breakpoint read signal generation circuit includes a multi-input OR gate; the breakpoint output signal generation circuit also Includes a multi-input OR gate. The memory can be any one of RAM,...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The related hardware break-point circuit for intelligent card simulation and debug comprises: a memory to store and output the break point information to following generating circuit, a bus selection circuit with input end and output end connected to simulation CPU bus and memory input respectively, a read-signal generating circuit, and a signal output circuit. This invention is free to limit of simulation CPU for user with arbitrary address.

Description

technical field [0001] The invention relates to the technical field of smart card simulation debugging, in particular to a hardware breakpoint circuit for a smart card simulation debugging system. Background technique [0002] The hardware breakpoint realization in the smart card emulation debugging system, the general method is to adopt the emulation CPU with breakpoint function in the emulation unit. The simulated CPU stores the breakpoint information in its register, and when the address of the user program is the same as this address, the simulated CPU enters the breakpoint state. The disadvantage of this method is that the design of the smart card emulation debugging system is restricted by the emulation CPU, and the emulation debugging system corresponding to the model cannot be designed without a certain type of emulation CPU. Another shortcoming of this method is that limited by the internal resources of the simulated CPU, only single-address program breakpoints can...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/36G06F11/00
Inventor 丁义民王琨陈震孟庆云徐磊王强
Owner BEIJING TONGFANG MICROELECTRONICS