用fpga控制ads1252采样，晶振高，速度快，采用的是同步模式，采样回来的前5个值不准，取值要从第6个值开始，第一位是标志位-With fpga control ads1252 sampling, crystal, high speed, using the synchronous mode, the first five sampling returned values ​ ​ are not allowed, ranging from the first six va