基于FPGA的手持式示波器设计

基于FPGA的手持式示波器设计

内容简介：在此设计的低成本手持式示波器是以ADC128S022模/数转换芯片为数据采集前端;使用FPGA片内双口内建RAM进行数据存储、有限状态机实现示波器的触发控制和显示驱动;最后再用LCD12864液晶模块完成终端的低成本图形显示.在DE0?Nano FPGA(Altera Cyclone IV)开发板上的测试结果表明,所设计的手持式示波器可以实现模拟信号任意电平上升沿或下降沿的触发测量;垂直灵敏度和扫描速度调节、波形参数的直接读出等功能.

Abstract：The analog?to?digital conversion chip ADC128S022 is taken as the data acquisition front?end in the design pro?cess of low?cost handheld oscilloscope. The FPGA on?chip dual?port RAM is used for data storage. A finite state machine is em?ployed to achieve the trigger control and display driver of the handheld oscilloscope. The LCD module LCD12864 is used to com?plete the low?cost terminal graphics display. Moreover,the results testing on the DE0?Nano FPGA(Altera Cyclone IV)develop?ment board show that the low?cost handheld oscilloscope can realize the functions of trigger measurement,vertical sensitivity ad?justment,scan speed adjustment and direct readout of waveform parameters at analog signal rising edge or falling edge at any electric level.

作者：王庆春, 何晓燕,

关键词：FPGA, 示波器, 液晶显示屏, 有限状态机