T536主板双摄像头的接口的使用-盈鹏飞嵌入式

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原创最新推荐文章于 2026-11-07 23:06:45 发布 190 阅读 AI 写同款· GEO 优化 ›

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CoM-T536产品特性：

采用Allwinner公司Cortex-A55四核T536处理器，最高速度为1.6GHZ；
支持2TOPS NPU,仅特定型号支持；
支持4K/25fps H.264视频编码，支持4K/15fps MJPEG编码；
支持1-4G Bytes LPDDR4 SDRAM；
支持EMMC 4G-64G大容量电子盘，可启动；或支持SPI NAND启动；
支持双通道LVDS，分辨率最高1920x1080@60fps；支持MIPI DSI显示, 分辨率最高1920x1020@60fps；
支持PCIE2.1;支持最多17路UART；支持四路CANFD；支持双路千兆以太网；
稳定的操作系统的支持，可预装LINUX 5.10/Ubuntu 20.04
邮票孔198POS设计，尺寸为:53.5*45MM

CoM-T536功能图:

STK-T536评估板功能图：

Camera摄像头测试

STK-T536评估板支持两个CSI接口的摄像头，它们分别是CN27和CN28。其中CN27支持OV5645摄像头，该接口使用的是MCSI/C信号(2Lanes)；CN28支持OV1385X摄像头该接口使用的是MCSI/A/B信号(4Lanes)。原理和接口位置见下图：

按照下图接好摄像头，注意摄像头的1脚与接口件的1脚对应：

使用csi_test_mplane进行摄像头测试

摄像头接入后，评估板上电，正常的终端信息如下：

[   12.560404] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor0_cameravdd supply, setting it to NULL!
[   12.571434] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor0_iovdd supply, setting it to NULL!
[   12.582211] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor0_avdd supply, setting it to NULL!
[   12.592790] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor0_dvdd supply, setting it to NULL!
[   12.603477] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor1_cameravdd supply, setting it to NULL!
[   12.614487] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor1_iovdd supply, setting it to NULL!
[   12.625043] [drm] skip fbdev plane update because plane used by userspace
[   12.625059] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor1_avdd supply, setting it to NULL!
[   12.643127] sunxi:vin:[WARN]: sensor_helper_probe: cannot get sensor1_dvdd supply, setting it to NULL!
[   12.686390] vin_isp 5900000.isp: Adding to iommu group 0
[   12.695062] vin_isp 5800800.vind:isp@4: Adding to iommu group 0
[   12.704469] vin_isp 5800800.vind:isp@5: Adding to iommu group 0
[   12.725980] vin_scaler 5910000.scaler: Adding to iommu group 0
[   12.733253] vin_scaler 5910400.scaler: Adding to iommu group 0
[   12.740529] vin_scaler 5910800.scaler: Adding to iommu group 0
[   12.747427] [drm] skip fbdev plane update because plane used by userspace
[   12.747824] vin_scaler 5910c00.scaler: Adding to iommu group 0
[   12.762801] sunxi-vin-core 5830000.vinc: Adding to iommu group 0
[   12.770188] sunxi-vin-core 5831000.vinc: Adding to iommu group 0
[   12.777559] sunxi-vin-core 5832000.vinc: Adding to iommu group 0
[   12.787505] sunxi:vin:[WARN]: get csi mipi clk fail
[   12.793041] sunxi:vin:[WARN]: get csi mipi src clk fail
[   12.804898] PWR_ON!
[   12.837818] sensor_init
[   12.840758] eRet:0, 0x300a:0x0, times_out:3
[   13.065696] eRet:0, 0x300b:0xd8, times_out:3
[   13.270531] PWR_OFF!
[   13.397954] ov5645 id:5645
[   13.404621] sunxi:vin:[INFO]: vinc1 is null
[   13.409376] sunxi:vin:[INFO]: vinc2 is null
[   13.414129] sunxi:vin:[INFO]: vinc3 is null
[   13.419237] sunxi:vin:[INFO]: vinc5 is null
[   13.424019] sunxi:vin:[INFO]: vinc6 is null
[   13.428850] sunxi:vin:[INFO]: vinc7 is null
[   13.433584] sunxi:vin:[INFO]: vinc9 is null
[   13.438292] sunxi:vin:[INFO]: vinc10 is null
[   13.443101] sunxi:vin:[INFO]: vinc11 is null
[   13.447989] sunxi:vin:[INFO]: vinc12 is null
[   13.452816] sunxi:vin:[INFO]: vinc13 is null
[   13.457628] sunxi:vin:[INFO]: vinc14 is null
[   13.462483] sunxi:vin:[INFO]: vinc15 is null

如果摄像头接入不正确，会出现I2c通信错误，信息如下：

[   11.636894] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   11.645459] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   11.654911] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   11.663173] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   11.671734] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   11.681090] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   11.689351] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   11.697912] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   11.707250] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   11.715397] sunxi:vin:[INFO]: [VIN_DEV_I2C]ov13855_mipi read retry 3, read addr is 0x300a
[   11.724600] eRet:-22, 0x300a:0x0, times_out:3
[   11.932405] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   11.940984] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   11.950234] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   11.958614] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   11.967185] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   11.976432] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   11.984846] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   11.993415] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.002658] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   12.011232] sunxi:vin:[INFO]: [VIN_DEV_I2C]ov13855_mipi read retry 3, read addr is 0x300a
[   12.020477] eRet:-22, 0x300a:0x0, times_out:2
[   12.231950] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   12.240525] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.249769] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   12.257979] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   12.266547] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.275790] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   12.284100] sunxi:twi-2512000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   12.292668] sunxi:twi-2512000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.301986] sunxi:twi-2512000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x36)
[   12.310142] sunxi:vin:[INFO]: [VIN_DEV_I2C]ov13855_mipi read retry 3, read addr is 0x300a
[   12.319494] eRet:-22, 0x300a:0x0, times_out:1
[   12.544328] chip found is not an target chip.
[   12.549304] PWR_OFF!
[   12.579805] sunxi:vin:[ERR]: registering ov13855_mipi, No such device!
[   12.616632] Bluetooth: HCI UART driver ver 2.3
[   12.621683] Bluetooth: HCI UART protocol H4 registered
[   12.648340] sunxi:twi-2513000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   12.656915] sunxi:twi-2513000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.666160] sunxi:twi-2513000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x3c)
[   12.674487] sunxi:vin:[ERR]: [VIN_DEV_I2C_ERR]sensor_write error!
[   12.681347] sunxi:vin:[ERR]: [VIN_DEV_I2C_ERR]ov5645_mipi sensor write array error, array_size 243!
[   12.692836] sunxi:twi-2513000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   12.701409] sunxi:twi-2513000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.710652] sunxi:twi-2513000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x3c)
[   12.718820] sunxi:twi-2513000.twi:[ERR]: drv-mode: Timeout when sending 9th SCL clk
[   12.727388] sunxi:twi-2513000.twi:[ERR]: drv mode: TWI BUS error state is drv:0x1 eng:0x20
[   12.736633] sunxi:twi-2513000.twi:[ERR]: drv-mode: xfer failed (dev addr:0x3c)

摄像头连接正确后，执行如下命令可查看到生成2个节点video0和video4表示正常。

Target# ls dev/video*

这些节点对应的接口如下：

节点	接口	备注
video0	CN28	OV13850摄像头
video4	CN27	OV5645摄像头

csi_test_mplane是全志提供验证摄像头的软件， csi_test_mplane指令介绍如下：

./csi_test_mplane 0 0 640 480 ./ 1 20 30 0
@arg1:  video节点号
@arg2:  rear/front(默认:0)
@arg3:  out_width
@arg4:  out_height
@arg5:  数据保存路径
@arg6:  数据格式(数据格式如下图所示)
@arg7:  数据保存帧数
@arg8:  帧率
@arg9:  WDR模式(0:normal  1:wdr)

接下来我们以video0为例，通过video0节点获取摄像头视频数据并存放在指定目录/tmp/，对于1080P的摄像头来说，指令如下；

Target#./csi_test_mplane 0 0 1920 1080 /media/sda1 2 100

指令执行终端信息如下：

root@T536-embfly:/extra_test# ./csi_test_mplane 0 0 1920 1080 /tmp  2 100
open /dev/video0 fd = 3
[  120.311589] PWR_ON!
[  120.346053] sensor_init
[  120.349077] eRet:0, 0x300a:0x0, times_out:3
[  120.574257] eRet:0, 0x300b:0xd8, times_out:3
resolution got from sensor = 1920*1080 num_planes = 1
[  120.811714] sensor_s_stream on = 1, 2112*1568 fps: 30 code: 3007
VIDIOC_STREAMON ok
[  153.963718] sensor_s_stream on = 0, 2112*1568 fps: 30 code: 3007
VIDIOC_STREAMOFF ok
mode 2 test done at the 0 time!![  153.979179] PWR_OFF!

指令执行后，如果指令执行执行正常，可以看到/tmp目录下保存二进制的图像数据 fb0_yuv1_1920_1080.bin 文件（如果是针对video4节点，那文件是fb4_yuv1_1920_1080.bin）。最后可通过RawViewer 等软件查看图像数据，注意看图时，看图软件中所设置的分辨率需注意按16字节进行对齐（向上取整），如使用 RawViewer 查看 1920x1080 图像时，需将看图尺寸设置为1920x1088，否则可能会看到花屏或抖动的图像。

点击“打开文件”按钮后，再点击“播放”按钮后进行视频播放。

使用camera_test_dual (QT)程序进行摄像头测试

camera_test_dual程序是qt图形界面程序，它最多可以预览两路摄像头，只要在运行时指定摄像头即可。

1）预览一路摄像头的指令和运行终端信息如下：

root@T536-embfly:/root# camera_test_dual /dev/video0
QStandardPaths: wrong permissions on runtime directory /dev/shm, 0755 instead of 0700
Unable to query physical screen size, defaulting to 100 dpi. To override, set QT_QPA_EGLFS_PHYSICAL_WIDTH and QT_QPA_EGLFS_PHYSIC
AL_HEIGHT (in millimeters). fmt.type: 9
fmt.fmt.pix.width: 1280
fmt.fmt.pix.height: 720
fmt.fmt.pix.pixelformat: 842093913
fmt.fmt.pix.colorspace: 1920
fmt.fmt.pix.quantization: 0
fmt.fmt.pix.xfer_func: 0
fmt.fmt.pix.ycbcr_enc: 0

csi预览画面会显示在屏幕上，如图所示：

2）预览双路摄像头的指令如下：

root@T536-embfly:/root# camera_test_dual /dev/video0 /dev/video4

另外，我们的固件已经把camera_test_dual程序设置为自启动，以下是启动camera_test_dual的脚本S98_app_demo.sh：

#!/bin/sh

. /etc/qtenv_capx.sh && ./extra_test/camera_test_dual /dev/video0 /dev/video4 &
#lv_examples 0 &

其中qtenv_capx.sh脚本是电容触摸屏识别和QT运行环境配置脚本，脚本内容如下：

export  QTDIR=/usr/lib
if [ -d $QTDIR ];then 
	export QT_ROOT=$QTDIR
    export PATH=$QTDIR/bin:$PATH
    export LD_LIBRARY_PATH=$QTDIR/lib:/usr/lib/cedarx/:$LD_LIBRARY_PATH

    export QT_QPA_PLATFORM_PLUGIN_PATH=$QT_ROOT/qt/plugins
    export QT_QPA_PLATFORM=linuxfb:tty=/dev/fb0
    export QT_QPA_FONTDIR=$QT_ROOT/fonts

	export QML_IMPORT_PATH=$QTDIR/qml 
	export QML2_IMPORT_PATH=$QTDIR/qml 

	#TouchDevice=gt9xxnew_ts
	for InputDevices in /sys/class/input/event*
	do
		DeviceName=`cat $InputDevices/device/name`
	        # USB ILITEK
		if [[ "$DeviceName" == "ILITEK ILITEK-TP" ]];then
		   TouchDeviceNum=${InputDevices##*event}
#		   export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event$TouchDeviceNum
#		   echo "add "/dev/input/event$TouchDeviceNum "to Qt Application."
		   break
            # I2C Goodix
		elif [ "$DeviceName" == "gt9xxnew_ts" ];then
		   TouchDeviceNum=${InputDevices##*event}
#		   export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event$TouchDeviceNum
#		   echo "add "/dev/input/event$TouchDeviceNum "to Qt Application."
		   break 
		#for hid-multi-touch(wks)
		elif [[ "$DeviceName" == "wch.cn USB2IIC_CTP_CONTROL" ]];then
		   TouchDeviceNum=${InputDevices##*event}
#		   export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event$TouchDeviceNum
#		   echo "add "/dev/input/event$TouchDeviceNum "to Qt Application."
		   break 
		fi 
	done

	if [ ! -n "$TouchDeviceNum" ]; then
		export QT_QPA_GENERIC_PLUGINS=evdevmouse,evdevkeyboard
		echo "Error:Input device $TouchDevice can not be found,plz use mouse & keyboard!"
	else
		#config for lvgl touchscreen lv_drv_conf.h 
		ln -sf /dev/input/event$TouchDeviceNum /dev/input/touchscreen
		export QT_QPA_EVDEV_TOUCHSCREEN_PARAMETERS=/dev/input/event$TouchDeviceNum
		export QT_QPA_GENERIC_PLUGINS=evdevtouch:/dev/input/event$TouchDeviceNum,evdevmouse,evdevkeyboard
		echo "add "/dev/input/event$TouchDeviceNum "to Qt Application."

	fi

	export QT_QPA_PLATFORM=linuxfb
#	export QT_QPA_GENERIC_PLUGINS=evdevtouch
	#export QT_QPA_EGLFS_INTEGRATION=eglfs_mali
	#export QT_QPA_FB_HIDECURSOR=1
	#export QT_QPA_EGLFS_HIDECURSOR=1
	#export QT_QPA_EGLFS_ROTATION=90
	export QT_QPA_FB_NO_LIBINPUT=1

	#export QT_QPA_PLATFORM=eglfs
    #export QT_QPA_GENERIC_PLUGINS=evdevtouch
    #export QT_QPA_EGLFS_INTEGRATION=eglfs_mali
    #export QT_QPA_FB_HIDECURSOR=1
    #export QT_QPA_EGLFS_HIDECURSOR=1
    #export QT_QPA_EGLFS_ROTATION=90

    export QWS_MOUSE_PROTO=
    export DBUS_SESSION_BUS_ADDRESS=`cat /tmp/dbusaddr`
    mkdir -p /dev/shm
    ulimit -c unlimited
    echo "find qt5 installed done"
fi

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