基于单片机和FPGA的扫频信号发生器

Design of Swept Signal Generator Based on MCU and FPGA

利用MSP430单片机和Altera FPGA,配合高速数模转换芯片AD768,提出了一种锯齿波扫频信号发生器的设计方法。通过上位机将所需的波形数据信息烧写至单片机,存储在FLASH中,现场可编程门阵列(FPGA)作为系统中的桥梁工具,提供FLASH的读地址和数模转换芯片的控制逻辑。实验结果输出波形正确稳定,符合雷达触发信号的要求。该设计方法简单、灵活,能适应不同信号的输出需求。

Making use of MSP430 MCU and Altera FPGA and coordinating with AD768 high speed D/A con- version chip, a new design method of saw-tooth wave frequency sweep signal generator was put forward, which has wave data downloaded to SCM via the host computer and then stored in FLASH, and the field programma- ble gate array （FPGA） used as the bridge tool in the system to provide read address of FLASH and control log- ic of D/A conversion chip. The experiment result shows that the output wave is stable and correct and it can meet the requirement of radar trigger signal. This simple and flexible design method can meet different signal output.