国产欧美精品一区二区,中文字幕专区在线亚洲,国产精品美女网站在线观看,艾秋果冻传媒2021精品,在线免费一区二区,久久久久久青草大香综合精品,日韩美aaa特级毛片,欧美成人精品午夜免费影视

For high speed A/D acquisition, Using the I/O, ARM9 maximum can be collected A/D 500KSPS.So, ARM can’t realize the higher speed data reading.To achieve faster, A high speed data acquisition method based on FPGA+ARM dual core architecture is proposed. FPGA can collect A/D 2MSPS.And the use of DMA ARM to complete the communication with FIFO FPGA. Using the memory remmapping of Linux to improve the application layer and the core layer of data transmission efficiency ,completing data collection. Designing the FPGA+ARM interface circuit in this system. Developing of DMA device driver. After the test,the system has the performance of the high-speed sampling.