基于Zynq的数字PCR荧光数据采集系统框架设计

Framework Design of Digital PCR Fluorescence Data Acquisition System Based on Zynq

文章介绍了一种数字PCR四通道荧光数据采集系统。该系统以Xilinx Zynq-7000为核心微处理器,PL驱动ADC芯片LTC2370采集荧光数据,将数据通过AXI4总线写入DDR3缓存,通过AXI4总线读出DDR3中荧光数据并通过USB3.0接口上传数据到PC;PS完成液路系统控制的功能。测试结果表明,所提出的基于Zynq的数字PCR荧光数据采集系统能够完成荧光数据采集、数据缓存以及USB3.0数据传输。该系统可实现优异的性能功耗比,使系统空间更小,扩展性更高,并为后期的荧光数据处理提供了丰富的资源。

This paper introduces a four-channel fluorescence data acquisition system for digital PCR. This system takes Xilinx Zynq-7000 as the core microprocessor. PL drives ADC chip LTC2370 to collect fluorescent data, writes the data into DDR3 buffer through AXI4 bus, reads out the fluorescent data in DDR3 through AXI4 bus, and uploads to PC through USB3.0 interface. PS completes the function of liquid system control. The test results show that the fluorescence data acquisition system based on Zynq can complete fluorescence data acquisition, data caching and USB3.0 data transmission. The system can achieve excellent performance power ratio, make the system space smaller and expand more, and provide rich resources for fluorescence data processing in the later period.