To develop the applications for Internet appliances, embedded sojiware development tools need various host tools such as cross compilers and binary utilities as well as a remote debugger, an interactive shell, and real-time resource monitors. The heavy host-target communication overhead and inconsistency caused by various host tools make target monitor programs more complex. In this paper, we propose a debugging protocol for these tools that supports several host-resident tools under the existence of RTOS. To abstract the details of the target systems, we have developed a target agent running as a task on the RTOS. Target agent is the counterpart of host agent that supports host tools through the communication over UDPIIP. The proposed architecture is implemented and tested on Est0 {Embedded Systems Toolset), a development tool for Internet-based embedded applications.
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