| 1. | The thesis has two main parts . the first is the hardware design , which mainly uses the method of cpld and vhdl , design a circuitry with the trim , inspection , control , asynchronous serial communication , at last with rs - 485 difference transmittal mode outputs the inspection results to the pc ' s rs - 232
第一部分为硬件电路设计，采用了cpld器件和vhdl进行设计，通过vhdl描述，设计了整形、检测、控制、异步串行通信为一体的电路，最后，检测结果通过rs - 485差分传送方式输出到计算机的rs - 232串行口上。 |
