Axi4-Stream Interfaces; Sideband Information On Axi4-Stream Interfaces - Xilinx Vivado MIPI CSI-2 Product Manual

X-Ref Target - Figure B-1

AXI4-Stream Interfaces

If data is not being transmitted or received, check the following conditions:
• If transmit <interface_name>_tready is stuck Low following the
<interface_name>_tvalid input being asserted, the subsystem cannot send data.
• If the receive <interface_name>_tvalid is stuck Low, the subsystem is not
receiving data.
• Check that the video_aclk and dphy_clk_200M inputs are connected and toggling.
• Check subsystem configuration.
• Ensure "Stream line buffer full" condition not getting reported in subsystem Interrupt
Status register.

Sideband Information on AXI4-Stream Interfaces

• Sideband information such as frame and line number appear on the TUSER signal of
the AXI4-Stream interface.
• Start of fame, frame number, line number, word count, and data type need to be
sampled by the user on the first beat of the transfer.
• Packet Error, ECC, and CRC need to be sampled by the user on the last beat of the
transfer.
The side band information are optionally sent by the sensor. Please refer to the Low Level
Note:
Protocol section of MIPI CSI-2 standard v2.0
MIPI CSI-2 RX Subsystem v4.0
PG232 July 02, 2019
Figure B-1: AXI4-Lite Timing
[Ref 1] for more details.
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Appendix B: Debugging
85
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