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====== HDMI to GMSL2: yCamSim-basic (YUV422/RGB888) ======

yCamSim-basic converts HDMI video to GMSL signal (YUV422/RGB888), usually used for video injection, ADAS algorithm validation, and device test.

yCamSim-basic does not support RAW, for RAW injection, please see [[摄像头及视频源:hdmi转gmsl_支持raw输出| yCamSim-pro: HDMI to GMSL, support RAW8/10/12]].

===== Block Diagram =====
yCamSim-basic converts HDMI video to GMSL signal.
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As shown in above image, when connected to a PC or other video source, in normal working mode:
  * To the video source, yCamSim-basic is a "Display device" or "screen".
  * To the down-stream DCU/ADAS controller, it is a GMSL camera with configurable resolution.

it is able to replace GMSL cameras(with ISP) module, to inject video.

Signal and power flow descripted blow(May change without prior notice)
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Images:

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===== User Manual =====
yCamSim-basic is a transparent video convert: convert HDMI to GMSL2 while keep the resolution and frame rate. The output format of the video is YUV422 or RGB. 

yCamSim-basic does not need special configuration.

===== Use Case =====

==== User case1：video loopback test====
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==== User case 2：front camera video injection ====
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==== User case 3：SVM video injection ====
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===== User Guide =====
**Basic Steps**
  * Connect the product's HDMI to the video source.
  * Use a GMSL cable to connect the Fakra interface of this product to the deserializer of the main controller.
  * The POC power supply for GMSL is 6–16V. When the power supply is normal, the red LED on the device will light up.
  * Check if the video source has detected a new display device.
  * Load the driver on the main controller and configure the serializer and deserializer chips.

==== Set Resolution ====
After poweron, enable POC output (the RED LED will on), connect HDMI to a video source (for example a PC), from the PC side, it is an normal display, its name is XREAL9295 or YYT-GMSL-XXX.

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It is recommended to use the extended display mode (the normal use of the computer will not be affected when video is output).
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The device and the display will negotiate a preset resolution. For example 4K（3840x2160）@30fps。 
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You may need to enter "Advanced settings" to confirm settings:
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  * In "advanced display settings", choose display of the HDMI2GMSL device, make sure the source signal resolution is the same as what you set. 
  * If it is not, click link below, and open display adaptor properties window. 
  * In the opened window, set appropriate resolution and framerate. 
  * Click confirm to save settings.

**（Please noted, for different windows version, the UI maybe different, please modify accordingly.)**

==== CSIRX Settings ====
Information useful when setup receivers：

- 4K 3840*2160:
<code>
format: YUV422 8BIT
resolution: 3840*2160
mipi lane: 4
mipi rate: 1200 ~ 1350 Mbps 
</code>
- 2K 1920*1080:
<code>
format: YUV422 8BIT
resolution: 1920*1080
mipi lane: 4
mipi rate: 560-640 Mbps
</code>

==== 调试建议 ====
[[en:gmsl相关文章:软件修改max9296的模式及速率|MAX9296: Mode and settings]]