通过evc编程实现wince下led灯中断控制，-through evc Programming wince under lights led interruption control,

编译环境为PB,或AK,实现27x平台上对DMA的控制,由于270平台上DMA都处在同一个一级中断下,要使用单个的DMA通道,通常也可以在OAL重新映射其中断号,但比较费事,本驱动实现对DMA的管理,用户可以申请各个优先级的通道-build environment for PB, or AK, achieving 27x platform for DMA control As the 270 platform with DMA are in the midst of an interruptio

win ce5.0的驱动框架,包含中断控制