In this guide, we will step-by-step guide you to use video camera OV5647 on SP7350 platforms.
Table of Contents
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1 OV5647
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Specification
5MP Max photograph resolution (2592 x 1944 = 5,038,848 pixels)
Pixel Size: 1.4 x 1.4 μm
Optical size: 1/4"
Lens: f=3.6 mm, f/2.9
Viewing Angle: 54° x 41°
Max video resolution: 1080p@30fps
Max frame rate: 480p@90fps
Maximum exposure times (seconds): 0.97
Selectable video resolutions: 1080p@30fps, 720p@60fps, 480p@90fps
2 Setup
2.1 Enable OV5647 in
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Linux Kernel Configuration
1 Enter the kernel configuration by running the following command in the top directory of project.
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make kconfig |
2 Selects submenussub-menus: Device Drivers>Multimedia support>Media ancillary drivers>Camera sensor devices
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3 Select OmniVision “OmniVision OV5647 sensor support support” and pressing press <Y> inlucdes. Then save and exit.
2.2 Modify
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Device-tree
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Source
Device-tree source files of SP7350 are located in linux/kernel/arch/arm64/boot/dts/sunplus/.
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Modify device tree source file to define OV5647 source for driver
2.2.1 Using SP7350 MIPI
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/CSI-RX4
Open OV5647_INT macro to add OV5647 node and link mipicsirx4.
2.2.2 Using SP7350
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Other MIPI
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/CSI-RX
Define OV5647 node in i2c node:
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mipicsirx: csirx@f8005480 {
port@0 {
reg = <0>;
/* MIPI CSI-2 bus endpoint */
csi1_ep1: endpoint {
remote-endpoint = <&ov5647_out>;
bus-type = <4>;
clock-lanes = <0>;
data-lanes = <1 2>;
};
}; |
2.3 Compile and
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Burn
2.4 Connect
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Sensor Module
Using C3V-W board MIPI-/CSI-RX4, as follows：
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2.5 Check
After the burning is completed, start the board. The system should print the following information through the serial port.
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root@dbv3:~# ls /dev/video0 /dev/video0 |
3 Test
3.1
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v4l2-ctl
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Command
This command is used to control V4L2 devices from the command line. It allows you to query device capabilities, set device parameters, and capture video and still image.
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root@dbv3:~# v4l2-ctl --all --device /dev/video0
Driver Info:
Driver name : sp_vin
Card type : SP_VIN
Bus info : platform:f8005980.video
Driver version : 5.10.201
Capabilities : 0xa5200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Device Capabilities
Device Caps : 0x25200001
Video Capture
Read/Write
Streaming
Extended Pix Format
Media Driver Info:
Driver name : sp_vin
Model : sunplus,sp7350-vin
Serial :
Bus info : platform:f8005980.video
Media version : 5.10.201
Hardware revision: 0x00000000 (0)
Driver version : 5.10.201
Entity Info:
ID : 15
Name : VIN8 output
Type : V4L2 I/O
Pad : 0: Sink
Priority: 2
Video input : 0 (VIN8 output: ok)
Format Video Capture:
Width/Height : 640/480
Pixel Format : 'GBRG' (8-bit Bayer GBGB/RGRG)
Field : None
Bytes per Line : 640
Size Image : 307200
Colorspace : Raw
Transfer Function : Default (maps to None)
YCbCr/HSV Encoding: Default (maps to ITU-R 601)
Quantization : Default (maps to Full Range)
Flags :
User Controls
white_balance_automatic 0x0098090c (bool) : default=0 value=0
exposure 0x00980911 (int) : min=4 max=980 step=1 default=980 value=980
gain_automatic 0x00980912 (bool) : default=0 value=0
horizontal_flip 0x00980914 (bool) : default=0 value=0 flags=modify-layout
vertical_flip 0x00980915 (bool) : default=0 value=0 flags=modify-layout
alpha_component 0x00980929 (int) : min=0 max=255 step=1 default=255 value=255
Camera Controls
auto_exposure 0x009a0901 (menu) : min=0 max=1 default=1 value=1
Image Source Controls
vertical_blanking 0x009e0901 (int) : min=24 max=32287 step=1 default=504 value=504
horizontal_blanking 0x009e0902 (int) : min=1256 max=1256 step=1 default=1256 value=1256 flags=read-only
analogue_gain 0x009e0903 (int) : min=16 max=1023 step=1 default=32 value=32
Image Processing Controls
pixel_rate 0x009f0902 (int64) : min=77291670 max=77291670 step=1 default=77291670 value=77291670 flags=read-only |
3.2 Capture
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Image
3.2.1 Config
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Video Device
Use v4l2-ctl -d /dev/video0 --set-ctrl params=value setting device controls.
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v4l2-ctl -d /dev/video0 --set-ctrl white_balance_automatic=1 |
3.2.2 Capture
Use v4l2-ctl --list-formats-ext --device /dev/video0 querying device video format.
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After executing the capture command, the stream data is written to /home/root/ov5647.raw.
3.3 Display
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Image Raw Data
3.3.1 Download and
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Install Raw Image Viewer
Download raw image viewer from PixelViewer | Carina Studio. And PixelViewer is an open source project based cross-platform image which viewer supports reading raw Luminance/YUV/RGB/ARGB/Bayer pixels data from file and rendering it.
3.3.2 Use
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PixelViewer to Open Image
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Config render params by 3.2.2 v4l2-ctl capture command
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