索智R16点亮ov2640.txt 开发板：深圳市索智科技有限公司SC3817R开发板，全志R16（CPU：Quad-Core Cortex-A7 CPU） 全志官网R16的简介 android4.4.2/linux3.4.39 2016/7/18 16:38 1、配置ov2640在android层配置的分辨率为vga（预览/拍照/录像） 注意：系统自带的快拍APP就在这里查找分辨率参数发送到camera的HAL层。 这里得分辨率设置为：1280x720 驱动里面搜索可以设置为：1600x1200, 1280x960, 1024x768, 1280x720, 800x600（出错）, 640x480 R:\wyb\test_ov2640_r16\android\device\softwinner\astar-evb20\configs\camera.cfg ;------------------------------------------------------------------------------- ; 用于camera的配置 ; ; 采用格式: ; key = key_value ; 注意: 每个key需要顶格写; ; key_value紧跟着key后面的等号后面, 位于同一行中; ; key_value限制大小为256字节以内; ; ;------------------------------------------------------------------------------- ;------------------------------------------------------------------------------- ; exif information of "make" and "model" ;------------------------------------------------------------------------------- key_camera_exif_make = MAKE_A31S key_camera_exif_model = MODEL_A31ST ;------------------------------------------------------------------------------- ; 1 for single camera, 2 for double camera ;------------------------------------------------------------------------------- number_of_camera = 1 ;------------------------------------------------------------------------------- ; CAMERA_FACING_BACK ; gc0307 ov2640 ;------------------------------------------------------------------------------- camera_id = 0 ;------------------------------------------------------------------------------- ; 1 for CAMERA_FACING_FRONT ; 0 for CAMERA_FACING_BACK ;------------------------------------------------------------------------------- camera_facing = 0 ;------------------------------------------------------------------------------- ; 1 for camera without isp(using built-in isp of Axx) ; 0 for camera with isp ;------------------------------------------------------------------------------- use_builtin_isp = 0 ;------------------------------------------------------------------------------- ; camera orientation (0, 90, 180, 270) ;------------------------------------------------------------------------------- camera_orientation = 90 ;------------------------------------------------------------------------------- ; driver device name ;------------------------------------------------------------------------------- camera_device = /dev/video0 ;------------------------------------------------------------------------------- ; device id ; for two camera devices with one CSI ;------------------------------------------------------------------------------- device_id = 0 used_preview_size = 1 key_support_preview_size = 1600x1200, 1280x960, 1024x768, 1280x720, 800x600, 640x480 key_default_preview_size = 1280x720 used_picture_size = 1 key_support_picture_size = 1600x1200, 1280x960, 1024x768, 1280x720, 800x600, 640x480 key_default_picture_size = 1600x1200 used_flash_mode = 0 key_support_flash_mode = on,off,auto key_default_flash_mode = on used_color_effect=0 key_support_color_effect = none,mono,negative,sepia,aqua key_default_color_effect = none used_frame_rate = 1 key_support_frame_rate = 10 key_default_frame_rate = 10 used_focus_mode = 0 key_support_focus_mode = auto,infinity,macro,fixed,continuous-video,continuous-picture key_default_focus_mode = auto used_scene_mode = 0 key_support_scene_mode = auto,portrait,landscape,night,night-portrait,theatre,beach,snow,sunset,steadyphoto,fireworks,sports,party,candlelight,barcode key_default_scene_mode = auto used_white_balance = 0 key_support_white_balance = auto,incandescent,fluorescent,warm-fluorescent,daylight,cloudy-daylight key_default_white_balance = auto used_exposure_compensation = 1 key_max_exposure_compensation = 3 key_min_exposure_compensation = -3 key_step_exposure_compensation = 1 key_default_exposure_compensation = 0 2、没有/dev/video1，只有/dev/video0 R:\wyb\test_ov2640_r16\android\device\softwinner\astar-evb20\ueventd.sun8i.rc /dev/video0 0666 media media #/dev/video1 0666 media media 3、在init.rc（init.sun8i.rc）中加载ov2640.ko这个驱动模块。 R:\wyb\test_ov2640_r16\android\device\softwinner\astar-evb20\init.sun8i.rc #csi module insmod /system/vendor/modules/videobuf-core.ko insmod /system/vendor/modules/videobuf-dma-contig.ko insmod /system/vendor/modules/cam_detect.ko #insmod /system/vendor/modules/actuator.ko #insmod /system/vendor/modules/ad5820_act.ko insmod /system/vendor/modules/cci.ko insmod /system/vendor/modules/vfe_os.ko insmod /system/vendor/modules/vfe_subdev.ko #insmod /system/vendor/modules/gc0307.ko #insmod /system/vendor/modules/ov2035.ko insmod /system/vendor/modules/ov2640.ko insmod /system/vendor/modules/vfe_v4l2.ko 启动之后实际加载的摄像头的驱动模块： shell@astar-evb20:/ $ lsmod gt82x 9849 0 - Live 0x00000000 bma250 7848 0 - Live 0x00000000 sunxi_schw 12559 0 - Live 0x00000000 (O) rtl8150 9023 0 - Live 0x00000000 sunxi_keyboard 3021 0 - Live 0x00000000 sw_device 13916 0 - Live 0x00000000 vfe_v4l2 445444 0 - Live 0x00000000 ov2640 11637 0 - Live 0x00000000 vfe_subdev 4523 2 vfe_v4l2,ov2640, Live 0x00000000 vfe_os 3951 2 vfe_v4l2,vfe_subdev, Live 0x00000000 cci 21775 2 vfe_v4l2,ov2640, Live 0x00000000 videobuf_dma_contig 5567 1 vfe_v4l2, Live 0x00000000 videobuf_core 16520 2 vfe_v4l2,videobuf_dma_contig, Live 0x00000000 bcm_btlpm 7442 0 - Live 0x00000000 bcmdhd 629907 0 - Live 0x00000000 mali 209490 25 - Live 0x00000000 (O) lcd 41263 0 - Live 0x00000000 disp 992816 8 mali,lcd, Live 0x00000000 nand 282774 0 - Live 0x00000000 (O) shell@astar-evb20:/ $ 4、驱动程序：ov2640.c及其V4L2的适配层。 配置ov2640.c的编译选项，只需要修改device目录中的Makefile打开ov2640即可： R:\wyb\test_ov2640_r16\lichee\linux-3.4\drivers\media\video\sunxi-vfe\device\ov2640.c R:\wyb\test_ov2640_r16\lichee\linux-3.4\drivers\media\video\sunxi-vfe\device\Makefile obj-m += ov2640.o R:\wyb\test_ov2640_r16\lichee\linux-3.4\drivers\media\video\sunxi-vfe\Kconfig R:\wyb\test_ov2640_r16\lichee\linux-3.4\drivers\media\video\sunxi-vfe\Makefile 5、 R:\wyb\test_ov2640_r16\lichee\tools\pack\chips\sun8iw5p1\configs\evb-20\sys_config.fex ;-------------------------------------------------------------------------------- ;vip (video input port) configuration ;vip_used: 0:disable 1:enable ;vip_mode: 0:sample one interface to one buffer 1:sample two interface to one buffer ;vip_dev_qty: The quantity of devices linked to capture bus ; ;vip_define_sensor_list: If you want use sensor detect function, please set vip_define_sensor_list = 1, and ; verify that file /system/etc/hawkview/sensor_list_cfg.ini is properly configured! ; ;vip_dev(x)_pos: sensor position, "rear" or "front", if vip_define_sensor_list = 1,vip_dev(x)_pos must be configured! ; ;vip_dev(x)_isp_used 0:not use isp 1:use isp ;vip_dev(x)_fmt: 0:yuv 1:bayer raw rgb ;vip_dev(x)_stby_mode: 0:not shut down power at standby 1:shut down power at standby ;vip_dev(x)_vflip: flip in vertical direction 0:disable 1:enable ;vip_dev(x)_hflip: flip in horizontal direction 0:disable 1:enable ;vip_dev(x)_iovdd: camera module io power handle string, pmu power supply ;vip_dev(x)_iovdd_vol: camera module io power voltage, pmu power supply ;vip_dev(x)_avdd: camera module analog power handle string, pmu power supply ;vip_dev(x)_avdd_vol: camera module analog power voltage, pmu power supply ;vip_dev(x)_dvdd: camera module core power handle string, pmu power supply ;vip_dev(x)_dvdd_vol: camera module core power voltage, pmu power supply ;vip_dev(x)_afvdd: camera module vcm power handle string, pmu power supply ;vip_dev(x)_afvdd_vol: camera module vcm power voltage, pmu power supply ;x indicates the index of the devices which are linked to the same capture bus ;fill voltage in uV, e.g. iovdd = 2.8V, vip_devx_iovdd_vol = 2800000 ;fill handle string as below: ;axp22_eldo3 ;axp22_dldo4 ;axp22_eldo2 ;fill handle string "" when not using any pmu power supply ;-------------------------------------------------------------------------------- [csi0] vip_used = 1 vip_mode = 0 vip_dev_qty = 1 vip_define_sensor_list = 0 vip_csi_pck = port:PE00 vip_csi_mck = port:PE01 vip_csi_hsync = port:PE02 vip_csi_vsync = port:PE03 vip_csi_d0 = port:PE04 vip_csi_d1 = port:PE05 vip_csi_d2 = port:PE06 vip_csi_d3 = port:PE07 vip_csi_d4 = port:PE08 vip_csi_d5 = port:PE09 vip_csi_d6 = port:PE10 vip_csi_d7 = port:PE11 vip_csi_sck = port:PE12 vip_csi_sda = port:PE13 ;vip_dev0_mname = "ov5640" vip_dev0_mname = "ov2640" vip_dev0_pos = "rear" vip_dev0_lane = 1 vip_dev0_twi_id = 2 ;vip_dev0_twi_addr = 0x78 vip_dev0_twi_addr = 0x60 vip_dev0_isp_used = 0 vip_dev0_fmt = 0 vip_dev0_stby_mode = 0 vip_dev0_vflip = 0 vip_dev0_hflip = 0 vip_dev0_iovdd = "axp22_dldo3" vip_dev0_iovdd_vol = 3300000 vip_dev0_avdd = "" vip_dev0_avdd_vol = 3300000 vip_dev0_dvdd = "" vip_dev0_dvdd_vol = 1800000 vip_dev0_afvdd = "" vip_dev0_afvdd_vol = 3300000 vip_dev0_power_en = vip_dev0_reset = port:PE14 vip_dev0_pwdn = port:PE15 vip_dev0_flash_en = vip_dev0_flash_mode = vip_dev0_af_pwdn = 6、开发板上摄像头的I2C挂载在TWI2上面了，逻辑是需要打开的（但是不打开也能够用，很奇怪！）： ;---------------------------------------------------------------------------------- ;i2c configuration ; twi_used = twix enable ;---------------------------------------------------------------------------------- [twi0] twi_used = 1 twi_scl = port:PH02 twi_sda = port:PH03 [twi1] twi_used = 1 twi_scl = port:PH04 twi_sda = port:PH05 [twi2] twi_used = 0 twi_scl = port:PE12 twi_sda = port:PE13 直接配置摄像头的I2C了： vip_csi_sck = port:PE12 vip_csi_sda = port:PE13 不过奇怪的是，摄像头并没有向其它平台那样生成这个设备节点： /sys/class/i2c-adapter/i2c-2/2-0030 shell@octopus-f1:/ $ shell@octopus-f1:/ $ cd /sys/class/i2c-adapter/i2c-2/ shell@octopus-f1:/sys/class/i2c-adapter/i2c-2 $ shell@octopus-f1:/sys/class/i2c-adapter/i2c-2 $ ll drwxr-xr-x root root 1970-01-02 08:06 2-003b --w------- root root 4096 1970-01-02 08:06 delete_device lrwxrwxrwx root root 1970-01-02 08:06 device -> ../../twi.2 -r--r--r-- root root 4096 1970-01-02 08:06 name --w------- root root 4096 1970-01-02 08:06 new_device drwxr-xr-x root root 1970-01-02 08:06 power lrwxrwxrwx root root 1970-01-02 08:06 subsystem -> ../../../../bus/i2c -rw-r--r-- root root 4096 1970-01-02 08:06 uevent shell@octopus-f1:/sys/class/i2c-adapter/i2c-2 $ 可能是ov2640的驱动程序不完整，没有通过i2c_detect来注册2-0030这个节点。 直接在驱动程序中读取I2C，还是对的。device ID = 0x2642。 7、奇葩的问题： 摄像头使用的是： http://www.waveshare.net/shop/OV2640-Camera-Board.htm OV2640 Camera Board vsync=15HZ，XCLK=24MHZ。href/pclk都有 camera打开摄像头是绿色屏幕（VGA分辨率），但是右上角貌似出来一点点图像。 后来使用示波器的探头挂在vsync之后，图像正常。 由于开发板和摄像头模组ov2640是飞线链接，硬件另外接了一个地，然后用纸胶布将地线和vsync捆绑在在一起，解决问题。 刚开始摄像头的3.3V电源使用的是g-sensor的（VCC-3V0），看见图像出现竖条纹（电源纹波干扰），接回来（VCC-3V0-CSI）就正常了。