Data Flow - Xilinx KCU105 User Manual

Data Flow

This section summarizes the TRD data flow.
Transmit Path
1. The GUI opens the driver interface for read/write functionality.
2. The GUI issues WRITE system calls for writing into BAR-mapped registers based on your
input.
3. The driver writes appropriate values into BAR-mapped registers.
Receive Path
1. The GUI issues a READ system call to read BAR-mapped registers based on your input.
2. The Character driver reads appropriate BAR-mapped registers and conveys the readings
to the GUI.
3. The GUI displays the read BAR-mapped register information.
PCI Express Control Plane TRD
UG918 (v2017.2) July 18, 2017
Chapter 5: Targeted Reference Design Details and Modifications
www.xilinx.com 39
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