基于μClinux的MMC卡的驱动程序的设计

The Design of Multimedia Card Driver Based on μClinux

嵌入式系统由于本身的存储容量的限制,急需要扩展外存,MMC卡就是解决外存扩展的一个方案。本文首先介绍了MMC卡的工作原理,然后简单介绍了μClinux的设备驱动程序功能,最后介绍 MMC卡的设备驱动程序的设计思路和架构,设备程序编写思路是严格按照μClinux下设备驱动的要求,因此对其他的设备驱动有一定的参考意义。

In embedded systems ,main memory is rather limited that it should be extended. Multimedia card is one of the ways to save the problem.This paper introduces the theory of MMC and the functions of device drivers in μClinux . The developed methods and technology of MMC device drivers are given. The methods introduced here comply the principle of device drivers in μClinux and are significative to other device drivers in μClinux.