海德汉最新的ENDAT2.2协议规范，用于单圈和多圈的绝对值编码器上。-Heidenhain ENDAT2.2 the latest protocol specification for single-loop and multi-ring on the absolute value encoder.

海德汉绝对式编码器代码，VHDL语言编写-Heidenhain absolute encoder code, VHDL language