Ess3980解码伺服整个系统源代码，遥控接受，按键处理，vfd显示驱动等参考作用。-Ess3980 decoding servo overall system source code, the remote control accepts, pressed key processing, vfd demonstrates reference function and so on the actuation.

用于DVD伺服系统上的rs232代码，目标板是AT91M408

DVD数字伺服系统DPD循迹伺服相位比较算法,可以根据输出波形判断循迹伺服情况