摘要
为了解决传统调试器与自主可控芯片兼容性不强的问题,文中针对自主设计的一款嵌入式CPU,分析了远程调试的原理,研究并设计了一种基于OpenOCD和DAP(调试访问端口)的远程调试系统。该系统通过OpenOCD向目标芯片发送调试命令,经过JTAG仿真器传给目标芯片的JTAG接口,并通过DAP生成总线事务完成调试操作。经实际应用表明,该系统支持插入断点、单步执行、读写寄存器和存储空间等调试功能,可作为GDB服务程序与GDB集成以实现更强大的调试功能,具有兼容性强,稳定性强,可扩展性好的特点。
In order to solve the problem of the compatibility between the traditional debugger and selfcontrollable chip. In view of the self-designed embedded CPU,this paper analyzes the principle of remote debugging,researches and designs a remote debugging system based on Open OCD and DAP(debug access port). The system sends the debug command to the target chip through Open OCD,these commands are sent to the JTAG port of the target chip by JTAG emulator and completes the debug operation through DAP generating bus transaction. The experiment and application show that this system supports insertion breakpoints,single-step execution,read or write registers and storage space and other functions,the system also can integrate with GDB as GDB server program to achieve more powerful debugging features,with strong compatibility,strong stability,good scalability.
出处
《电子设计工程》
2017年第22期149-153,共5页
Electronic Design Engineering
