基于USB和FPGA的多功能等效器设计

针对航天遥测设备在研制和地面模拟测试中需要有设备模拟遥测外系统的各种控制和测量参数,设计并实现了一种以FPGA、USB、高速DAC、DS26C31、高速光耦AQY210为核心,结构简单、控制灵活、信号质量高的多功能等效器。该等效器实现了上位机与等效器主控模块FPGA的通信接口使用了FT245RL;多路不同参数的直流信号;正弦信号;基于AQY210的时间指令脉冲信号;应用DS26C31实现了特定帧结构的异步串行通信数据。

The design of multifunctional equivalent-device based on the USB and FPGA

According to the space telemetry-equipment need to have equipment simulating various controlling and measuring parameters of the telemetry outside for system in research and ground simulated tests,this paper designs and realizes a multifunctional equivalent-device,which based on FPGA, USB, high speed DS26C31, high speed DAC and light-coupler AQY210 that thay are viewed as the core,which the structure is simple, the control is flexible, the signal have high quality.The equivalent-device have functions as follows,PC have communication with the master-control-module FPGA of the equivalent-device by FT245RL,the DC-signal have many different parameters,sine-signals is achieved,the time-instructions pulse-signal is based on the AQY210, the asynchronous serial communication data have specific frame structure by DS26C31.