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The purpose of planning is to analyze and plan. During the planning phase, the development team needs to analyze the feasible solutions and develop the process so that the project can be gradually constructed within a reasonable process.

One of the most important things in designing a system is determining the architecture of the system.

There are two ways to design a system, one is the top down design, and the other is the bottom-up design method.

When the project enters the system design, the system Designer will begin to evaluate the hardware and software needed, and the embedded system is the combination of the hardware.

The purpose of the planning analysis is to give the development team an opportunity to check the feasibility of the system specifications.

In the system design, we need to find the appropriate component system to achieve the system specifications in the system specification stage. In determining the key components of the system, it must be designed by the architecture of the system before the system details are designed.

From the top down is an orthodox design approach, to determine the requirements, set the system specifications, design, implementation, testing, are step-by-step, orderly.

The bottom-up meaning is that a system is based on an already existing foundation as the starting point, beginning to extend upward, and finally the system is completed, so there is already all limitations on the innate.

Embedded system is different from the general information system is the location of its hardware and the unique environment, so the choice of micro-controller is the first choice of embedded system design. In order to meet the requirements of the system, the appropriate components must be selected to be paired with the microcontroller to complete all the conditions in the system specification. These components include hardware components and software components.

The design template is a mature technology developed by the predecessors in the process of software development, which can be used as a template.

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