Freescale Semiconductor i.MX 6SoloLite Linux, Справочное руководство

Страница: 97 / 199

Chapter 13
OV5640 Using parallel interface
This is an introduction to the OV5640 camera driver that uses the parallel interface.
13.1 Hardware Operation
The OV5640 is a small camera sensor and lens module with low-power consumption.
The camera driver is located under the Linux V4L2 architecture. and it implements the
V4L2 capture interfaces. Applications cannot use the camera driver directly. Instead, the
applications use the V4L2 capture driver to open and close the camera for preview and
image capture, controlling the camera, getting images from camera, and starting the
camera preview.
The OV5640 uses the serial camera control bus (SCCB) interface to control the sensor
operation. It works as an I
2
C client. V4L2 driver uses I
2
C bus to control camera
operation.
OV5640 supports only parallel interface.
Refer to OV5640 datasheet to get more information on the sensor.
Refer to the i.MX 6 Multimedia Applications Processor Reference Manual for more
information on CSI.
13.2 Software Operation
The camera driver implements the V4L2 capture interface and applications and uses the
V4L2 capture interface to operate the camera.
The supported operations of V4L2 capture are:
• Capture stream mode
• Capture still mode
i.MX 6SoloLite Linux Reference Manual, Rev. L3.0.35_4.1.0, 09/2013
Freescale Semiconductor, Inc. 97