METHOD OF PROVIDING SHELL FUNCTION FOR DEVELOPING OPERATING SYSTEM OF BUILT-IN SYSTEM

摘要

PURPOSE: A method for providing shell function for developing operating system is provided so that the developing cost of system can be reduced by correcting the user program without correcting shell program, thereby capable of registering and canceling commands optionally. CONSTITUTION: A method for providing shell function for developing operating system includes an initialization step (S1) for initializing a serial input/output device as an original mode. A step is to initialize a command table as an empty state (S3). If a request for command register is inputted, a step is to register a processor to the command table (S3). If a command is inputted, a step is to search the command in the command table, call and executing the corresponding processor (S7,S8). Thereafter, if a request of the command cancel is inputted, a step is to cancel the command from the command table (S9,S10).