芯片bt8237的底层驱动,实现E1/T1帧的构建-chip bt8237 the bottom drive to achieve E1/T1 Frame Construction

ITU规范G.704。E1帧结构定义。Synchronous frame structures used at 1544, 6312, 2048, 8448 and 44 736 kbit/s hierarchical levels

SDH是现代光纤通信中广泛应用的数据传输格式,在SDH帧结构中，前9列为开销字节，它包含了很多重要的信息，本程序为SDH开销的接收处理，查找帧头，分频，勤务话字节E1异步fifo。可拆为三段源代码，不知道能不能抵三个程序-SDH is a modern optical fiber communication is widely used in data transmission format, in the SDH frame structure, as the former 9 overhea