基于FIFO写数据方式的USB接口信号发生器设计

Design of USB Interface Signal Generator Based on FIFO Data Writing

介绍了一种USB接口虚拟仪器,该虚拟仪器采用FIFO写数据方式作为信号发生器的数据传输模式。信号发生器使用EZ-USB系列USB芯片CY7C68013作为硬件的主控芯片,上位机利用VC++设置程序实现波形的产生,产生波形信号后,调用cyioctl控制函数与下位机固件程序完成数据的通讯,最后由固件程序实现对内部FIFO芯片存储器的读写。

This paper introduces a virtual instrument based on USB interface .The virtual instrument uses FIFO to write the data . This signal generator uses EZ‐USB series USB chip CY7C68013 as the main control hardware chip .The waveform generation uses the VC＋ ＋ program .The lower machine firmware completes data communication by cyioctl .The firmware program uses the internal FIFO chip memory to read and w ritedata .