一种基于DDR的PS与PL数据交互方法的设计与实现

针对片上系统芯片中处理系统和可编程逻辑之间数据交互量大的应用,提出了一种基于双倍速率同步动态随机存储器的PS与PL数据交互方法.PS与PL通过访问共同的DDR,按照自定义的协议进行数据交互.将DDR中用于数据交互的空间划分为指令空间和数据空间,PS和PL通过读写指令空间中的指令数据并按照协议分析其所传递的信息,以控制各...

Design and implementation of data interaction method between PS and PL based on DDR

Aiming at the application of large amount of data interaction between processing system and programmable logic in system of chip, a data interaction method between PS and PL based on double data rate synchronous dynamic random access memory is proposed. PS and PL interact with each other according to the custom protocol by accessing the common DDR. The space for data interaction in DDR is divided into instruction space and data space. PS and PL control their reading and writing processes by reading and writing instruction data in instruction space and analyzing the information they transmit according to the protocol. PL accesses DDR through high-speed on-chip bus, and PS uses memory read-write tools to read and write DDR. The test results show that the interaction method has the advantages of high speed, less logic resources and convenient use. The data interaction speed can reach 88MB/s. It is suitable for the application scenario where PS and PL need to interact a large amount of data in real time. It has been successfully applied in the vehicle real-time high-precision positioning system based on three-dimensional lidar.