Embedded development program framework

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framework design

stay 《 The code of 》 The first 5 In the chapter , Program design is divided into these levels ：

• The first 1 layer ： software system , It's the whole system 、 Whole procedure
• The first 2 layer ： Break down into subsystems or packages . For example, we can split it into ： Input subsystem 、 Display subsystem 、 Business system
• The first 3 layer ： Decompose into classes . stay C There are no classes in the language , You can use structures to describe subsystems .
• The first 4 layer ： Decompose into subroutines ： Implement those structures ( There are function pointers in the structure ).

Concept of framework

It means that our code is convenient for upper developers to read , We need to encapsulate the underlying driver , Buffer through the middle layer , So that the upper layer can easily call at the same time , Engineers who write business bare metal can also easily understand our code design . In fact, it is a very simple logic of engineering programming . adopt .c File to achieve a certain function , adopt .h The document states . So the main function main You can pass .h Header file to call .c File implementation function .

summary

There's no code this time , So sorry . Later code will be used in practice , Just pay attention to understanding logic .