How to transmit Monochrome sensor 14 bit raw data using MIPI CSI-2 TX Controller IP core

[core2explore]

Objective:

Transmission of Non-MIPI camera sensor data (i.e. any monochrome sensor) using MIPI CSI-2 TX Controller Ip core from on one Arty7 Board to another Arty7 board as MIPI CSI-Rx system or any MIPI Receiver based Video processor.

IP core Application:

The Xilinx MIPI CSI-2 TX Controller implements camera sensor transmitter interface over MIPI D-PHY Interface. It can be used to bridge between non-MIPI camera sensors to MIPI based video processor.  This Core provides combination of MIPI CSI-2 transmit controller and D-PHY interface.

System Overview as per our understanding:

·         After power on, Clock generator IP core generates different clock required for FPGA subsystems. (Status : Working)

·         FPGA configures camera sensor by providing appropriate commands via I2C Interface.(Status : Working)

·         After successful configuration, Sensor generates PSYNC (Pixel Clock), HSYNC (Line Clock), VSYNC (Frame clock) and 14-bit video data which are input to FPGA.  (Status : Working)

·         Since sensor provides Non-MIPI output signals and Xilinx MIPI CSI-2 Tx doesn’t have monochrome RAW data input, one complete control system required in FPGA which convert these sensors output signals in to MIPI CSI-2 TX Core compatible data and control signals. (Status :  How to give above signals to this IP core, After implementing required logic we are not getting any output on this IP core)

·         MIPI CSI-2 Tx controller core has In-built physical layer which generated D-PHY outputs. (Status : Not outputs on D-PHY)

·         D-PHY output can be accessible to another Arty-7 board as MIPI CSI-2 Rx or any MIPI based video processor to perform further post-processing.

·         Above description is given in block diagram and sensor waveform

·         Sensor specification: image resolution 384 x 288 @ 30 FPS with 14 bit RAW video data.

Problem faced:  sensor provides Non-MIPI output signals and Xilinx MIPI CSI-2 Tx doesn’t have monochrome RAW data input, So we are not able generate any D-PHY output after configuration. No examples related to RAW data of 8 or 14 bit.

References:

1.      MIPI CSI Controller Subsystems –

https://www.xilinx.com/products/intellectual-property/ef-di-mipi-csi-rx.html#overview

2.      MIPI CSI-2  Transmitter Subsystem  V2.1 - 

https://www.xilinx.com/support/documentation/ip_documentation/mipi_csi2_tx_subsystem/v2_1/pg260-mipi-csi2-tx.pdf