基于FPGA的并行数据转SPI接口设计

在进行不同设备间的数据传输时,最基本的要求是连线尽可能少、数据传输速率尽可能快、误码率尽可能低。对此进行了并行数据转换为串行数据的接口电路研究,提出了同步并行传输速率的n倍改进SPI传输方案。其特点是传输速率高、时钟独立、可与并行接口端和SPI串行接口端进行双向通信。测试结果显示系统达到预定功能,其接口电路的实现方法可为数据的高速接口提供新的借鉴。

FPGA-based Interface Circuit Design for Parallel to SPI

For transmission data between different devices, the most basic requirement should be connection wires as few as possible, data transmission rate as fast as possible and bit error rate as low as possible. Accordingly, the interface circuit to convert the parallel data into serial PSI is researched, and a transmission scheme of synchronous n-times SPI transfer rate as that of parallel transfer is put forward. Its characteristics are high transfer rate, independent clock, and bidirection communication between parallel interface port and SPI. The test results show that the system achieves the intended function, the implementation method of interface circuit provides a new model to the data of the high speed interface.