用的pic16府77a芯片，作为测量类的原代码,读取光栅传感器的信号,并带有预制数，线形修正、最大数保持、最小数保持，设置分辨率等功能-Pic16 House 77a used in chips, as measured in the original category code, read the grating sensor signal with a number of prefabricated, linear amended to maintain the maximum number