DVP Use Board Resource There is a DVP camera interface on the Firefly-RK3288-Reload development board. This article will introduce how to make the camera work properly, using OV5640 as an example. Relevant Code Directory The code directories of camera are shown as followed: Android: `- hardware/rockchip/camera |- Config | `- cam_board.xml # Parameter Configuration |- CameraHal # HAL source code `- SiliconImage # ISP library, including driver source code of all supported modules. `- isi/drv/OV5640 # Driver source code of OV5640 module. `- calib/OV5640.xml # Calibration parameter of OV5640 module. Kernel: |- kernel/drivers/media/video/rk_camsys // CamSys driver source code `- kernel/include/media/camsys_head.h Configuration Theory What you need to configure the camera is to make the pins and clock work properly. According to the schematic diagram below, you need to provide: VCC28_DVP、VCC18_DVP、VCCIO_YUV、PWDN(FLASH0_CLE)、RESET and XCLK1. RST controled by PDN1 PWDN、RST are connected to GPIO3_B4、GPIO2_B7 Android Layer Configuration Edit hardware/rockchip/camera/Config/cam_board_rk3288.xml to configure the camera: You can modify these contents: Sensor Name This name must match the name of the sensor driver, which has the following format: libisp_isi_drv_OV5640.so This driver file will be created in directory " out/target/product/rk3288_box/system/lib/hw/" after an Android build. Sensor Software ID The ID must be unique among the camera drivers.You can fill with the following values: CAMSYS_DEVID_SENSOR_1A CAMSYS_DEVID_SENSOR_1B CAMSYS_DEVID_SENSOR_2 Collector Name Currently only support: CAMSYS_DEVID_MARVIN I2C channel number You can get the number via schematic or datasheet of RK3288. Length of Register Address (in bytes) Clock of I2C (in Hz) MCLK of Camera (in Hz) PMU LDO Name Connected to AVDD. Set to NC if not connected. PMU LDO Name Connected to DOVDD Set to NC if not connected to PMU. Value of min and max must be specified, which determinte the voltage of the IO pins. PMU LDO Name Connected to DVDD Set to NC if not connected to PMU. PowerDown Pin Fill in the GPIO's name and active level. Reset Pin Fill in the GPIO's name and active level. Power Pin Fill in the GPIO's name and active level. Facing Value Set the value as "front" or "back". Camera Interface Type The following values are valid: CCIR601 CCIR656 MIPI SMIA Mirror Flip This is not supported at the moment. Orientation Hardware Interface DVP phyMode: Sensor hardware interface type, set to "CamSys_Phy_Cif" if it is a DVP sensor. sensor_d0_to_cif_d: The data number of the SoC DVP interface, which is connected with output data D0 of sensor DVP. cif_num: The interface number of the SoC DVP, which is connected with sensor DVP. sensorFmt:Data format of sensor output. Only "CamSys_Fmt_Raw_10b" is supported. Compile Kernel Build "drivers\media\video\rk_camsys" driver into kernel, with following configuration instructions: Run in the kernel source directory: make menuconfig Select the following configuration items: Device Drivers ---> <*>Multimedia support ---> <*>camsys driver RockChip camera system driver ---> <*> camsys driver for marvin isp < > camsys driver for cif Finally, run: make firefly-rk3288-reload.img which will start the kernel compilation.