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TWadu's avatar
TWadu
Icon for New Contributor rankNew Contributor
5 years ago

PCIE硬核作为endpoint时，如何主动发起通信？

使用cyclone V芯片的pcie硬核，FPGA端作为EP，PC端作为RC。数据可以双向传输（通过DMA），但总是由RC发起的，即EP不能主动发起DMA传输，请问如果想EP主动发起传输，需要如何设置？或有哪些手册介绍？谢谢！
SengKok_L_Intel's avatar
SengKok_L_Intel
Icon for Regular Contributor rankRegular Contributor
5 years ago

This depends on how you control the Descriptor controller to initial DMA transfer. If this is your custom DMA descriptor controller, you probably can add some logic at the endpoint to control the DMA.


Regards -SK


  • Shark121's avatar
    Shark121
    Icon for New Contributor rankNew Contributor
    5 years ago

    Hello, i face the same problem recently, and i'm new to this design. Could you explain what is the "Descriptor controller"? Is that in PCIe hard IP core?