A software module that hides the details of a particular peripheral and provides a high-level programming interface to it.
一个软件模块，它隐藏特定外设的细节并提供高级的外设编程接口。
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Not only was the peripheral applications software (mortgage generation, derivatives) buggy — the whole banking OS was incorrectly designed and specified.
In this paper, it discuss the hardware design and software design of the system. In hardware design, it mainly includes peripheral memory, low Butterworth filter, isolated serial port.