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tech:rccar [2016/01/08 22:26] – [WLAN] bullartech:rccar [2016/01/13 21:38] (current) – [RC Car] bullar
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-===== RC Car =====+====== RC Car ======
  
-====STOUT====+The RC-Car consists of:
  
-Connect the camera module (8-bit data interface) to STOUT (CN6: VIN0_camera I/F 34pin) and restart YOCTO. +  * stout (H2 start.now) with OV10635 based camera module (8-bit I/F) 
 +  * PCB extension (RC mixer and Accel/Gyro chip) {{:tech:rc-car_pcb.pdf|}}  {{:tech:rc-car_sch.pdf|}} 
 +  * 4WD drive chassis (Reely On-Road Chassis, CONRAD order no.: 238011-62) 
 +  * Steering servo (Modelcraft Standard-Servo 4519 Analog-Servo. CONRAD order no.: 206464 - 62) 
 +  * Speed controller (Modelcraft Carbon-Series Fahrtregler, CONRAD order no.: 207368 - 62) 
 +  * LiPo 7.4V 2200mAh (for motor) 
 +  * LiPo 14.8V 3000mAh (for electronic)  
 +  * Optional: 
 +    * Transmitter Turnigy TGY 9X 
 +    * Receiver Turnigy 9X8C-V2 8-channel 
 +    * WLAN EDIMAX EW-7811Un 
 +=====Blockdiagram=====
  
-====DMESG output==== +{{:tech:bildschirmfoto_2016-01-13_um_22.34.59.png?direct&600|}}
-After boot the following messages could be find: +
-<code> +
-[    2.971467] soc-camera-pdrv soc-camera-pdrv.0: Probing soc-camera-pdrv.0 +
-[    3.094623] ov10635 2-0030: ov10635 Product ID a6 Manufacturer ID 35 +
-[    3.734729] soc-camera-pdrv soc-camera-pdrv.1: Probing soc-camera-pdrv.1 +
-[    3.751281] ov10635 1-0030: Failed writing register 0x0103! +
-[    3.764290] soc-camera-pdrv soc-camera-pdrv.2: Probing soc-camera-pdrv.2 +
-[    3.780825] ov10635 2-0031: Failed writing register 0x0103! +
-[    3.793827] soc-camera-pdrv soc-camera-pdrv.3: Probing soc-camera-pdrv.3 +
-[    3.810367] ov10635 1-0031: Failed writing register 0x0103! +
-[    3.823710] rcar_jpu fe980000.jpeg-codec: encoder device registered as /dev/video1 +
-[    3.842579] rcar_jpu fe980000.jpeg-codec: decoder device registered as /dev/video2 +
-</code> +
- +
-The command ''v4l2-ctl --all'' shows the actual capability and status: +
-<code> +
-root@stout:~# v4l2-ctl --all +
-Driver Info (not using libv4l2): +
- Driver name   : r8a7790-vin.0 +
- Card type     : R_Car_VIN +
- Bus info      :  +
- Driver version: 3.10.31 +
- Capabilities  : 0x04200001 +
- Video Capture +
- Streaming +
-Video input : 0 (Camera: ok) +
-Format Video Capture: +
- Width/Height  : 1280/800 +
- Pixel Format  : 'NV16' +
- Field         : None +
- Bytes per Line: 1280 +
- Size Image    : 2048000 +
- Colorspace    : Broadcast NTSC/PAL (SMPTE170M/ITU601) +
- Custom Info   : deadbeef +
-Crop Capability Video Capture: +
- Bounds      : Left 0, Top 0, Width 1280, Height 800 +
- Default     : Left 0, Top 0, Width 1280, Height 800 +
- Pixel Aspect: 1/1 +
-Crop Capability Video Capture: +
- Bounds      : Left 0, Top 0, Width 1280, Height 800 +
- Default     : Left 0, Top 0, Width 1280, Height 800 +
- Pixel Aspect: 1/1 +
-Crop: Left 0, Top 0, Width 1280, Height 800 +
-Streaming Parameters Video Capture: +
- Capabilities     : timeperframe +
- Frames per second: 25.000 (25/1) +
- Read buffers     : 0 +
- +
-User Controls +
- +
-                horizontal_flip (bool)   : default=0 value=0 +
-                  vertical_flip (bool)   : default=0 value=0 +
- +
-</code> +
- +
-====Capture==== +
- +
-Video can be captured with the tool ''avconv'': \\ +
- +
-**Example 1 (capture and store a MJPEG video):**\\  +
-<code> +
-avconv -f video4linux2 -pix_fmt yuv422p -s 1280x720 -r 25 -i /dev/video0 -c:v mjpeg result.mov +
-</code> +
- +
-**Example 2 (capture and stream as H264 or MPEG2 video):**\\ +
-<code> +
-avconv -f video4linux2 -pix_fmt yuv422p -s 1280x720 -r 25 -i /dev/video0 -c:v libx264 -f mpegts udp://192.168.0.16:6000 +
-avconv -f video4linux2 -pix_fmt yuv422p -s 1280x720 -r 25 -i /dev/video0 -vcodec mpeg2video -r 25 -f rtp rtp://192.168.0.16:1234 +
-</code> +
- +
-**Example 3 (capture one frame and store as picture):**\\ +
-<code> +
-./capture -d /dev/video0 -f -o -c 1 > video_1f.uyvy +
-convert -size 1280x720 -depth 16 -sampling-factor 4:2:2 ./Desktop/video_1f.uyvy ./Desktop/video_1f.png +
-</code> +
- +
-** Example 4**\\ +
- +
-<code> +
-./capture -d /dev/video0 -f -o -c 10000 > file.img +
- +
-gst-launch-1.0 -v v4l2src device=/dev/video0 io-mode=dmabuf ! 'video/x-raw,format=NV16,width=1280,height=800,framerate=30/1' ! omxh264enc target-bitrate=9600000 ! avimux ! filesink location=/run/tmp.mp4 +
- +
-gst-launch-1.0 -v v4l2src device=/dev/video0 io-mode=dmabuf ! 'video/x-raw,format=NV16,width=1280,height=800,framerate=30/1' ! omxh264enc target-bitrate=9600000 ! 'video/x-h264,profile=baseline,level=(string)2.2' ! h264parse ! avimux ! filesink location=/run/test2.avi +
- +
-</code> +
- +
- +
-===== WLAN ===== +
- +
-On STOUT the nano WLAN module (EW-7811Un) with Chip Set Realtek RTL818x can be embedded. +
-{{:tech:ew-7811un.jpg?nolink&100|}} +
- +
-The kernel has to be prepared for ''readyForModuleRTL8192CU''. +
- +
-Load the module ''wlan.ko'' and start the interface by \\ +
-''insmod wlan.ko''\\ +
-''ifconfig wlan0 up''\\ +
-</code> +
-Where wlan0 is the name of your wireless device (this is most often the default). The above command will bring your wireless device up so it is ready to use. +
-''ifconfig'' shows your devices already: +
-<code> +
-wlan0     Link encap:Ethernet  HWaddr 80:1F:02:F1:DF:A9   +
-          UP BROADCAST MULTICAST  MTU:1500  Metric:1 +
-          RX packets:0 errors:0 dropped:2 overruns:0 frame:0 +
-          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 +
-          collisions:0 txqueuelen:1000  +
-          RX bytes:0 (0.0 B)  TX bytes:0 (0.0 B) +
-</code> +
-The next phase is to scan for any wireless access points with the command\\ +
-''iwlist wlan0 scan''\\ +
-From the output of the scan you should see a line (or lines) like: +
-<code> +
-wlan0     Scan completed : +
-          Cell 01 - Address: 28:37:37:48:EF:2C +
-                    ESSID:"WLAN_RB" +
-                    Protocol:IEEE 802.11bgn +
-                    Mode:Master +
-                    Frequency:2.437 GHz (Channel 6) +
-                    Encryption key:on +
-                    Bit Rates:144 Mb/s +
-                    Extra:rsn_ie=30140100000fac040100000fac040100000fac020000 +
-                    IE: IEEE 802.11i/WPA2 Version 1 +
-                        Group Cipher : CCMP +
-                        Pairwise Ciphers (1) : CCMP +
-                        Authentication Suites (1) : PSK +
-                    Quality=78/100  Signal level=51/100   +
-</code> +
- +
-For non-WP-based Networks do the following:  +
- +
-From the output of the scan you should see a line (or lines) like: +
- +
-''ESSID: "NETWORK_NAME"'' +
- +
-Where NETWORK_NAME is the name of an available wireless network. +
- +
-Now that you have your network name (and you know it's available) you can connect to that network with the command: +
- +
-''iwconfig wlan0 essid NETWORK_NAME key WIRELESS_KEY'' +
- +
-Where NETWORK_NAME is the name of the network you want to connect to and WIRELESS_KEY is the security key for that network. NOTE: The iwconfig command defaults to HEX values for wireless keys. If you need to use ascii you have to prepend the "s" prefix to your key like so: +
- +
-''iwconfig wlan0 essid NETWORK_NAME key s:WIRELESS_KEY'' +
- +
-With your connection made, you now have to get an IP address for your machine using the dhclient command like: +
- +
-''dhclient wlan0'' +
- +
- +
-For WPA-based networks you will need to spend some effort. Do the following: +
- +
-1. Issue the command \\ +
-''wpa_passphrase SSID PASSWORD''\\ +
-(Where SSID is your network ID and PASSWORD is your wireless password). This will generate a psk string that you will use in the configuration file. Output is: +
-<code> +
-network={ +
- ssid="SSID" +
- #psk="PASSWORD" +
- psk=c2161655c6ba444d8df94cbbf4e9c5c4c61fc37702b9c66ed37aee1545a5a333 +
-} +
-</code> +
- +
-2. Edit the ''/etc/wpa_supplicant.conf'' file to reflect: +
- +
-<code> +
-Network={  +
-    ssid=SSID +
-    psk=PSK +
-} +
-</code> +
- +
-Where SSID is the actual ID of your wireless network and PSK is the string generated by the wpa_passphrase command. +
- +
-3. Run the wpa_supplicant daemon with the command:\\ +
- +
-''wpa_supplicant -B -i wlan0 -Dwext -c /etc/wpa_supplicant.conf''\\ +
- +
-Where ''wlan0'' is the name of your wireless interface. +
- +
-4. Now make sure you are associated with your network with the command \\ +
-''ifconfig wlan0''\\ +
-(Where ''wlan0'' is the name of your wireless interface). +
- +
-5. Get an IP address with the command: \\ +
-''dhclient wlan0''  +
-(Where ''wlan0'' is the name of your wireless interface). +
- +
-You should now be on the wireless network. +
-You can automate this by creating an entry in ''/etc/network/interfaces'' like this: +
- +
-<code> +
-auto wlan0 +
- +
-iface wlan0 inet dhcp +
-    pre-up wpa_supplicant -Bw -Dwext -i wlan0 -c /etc/wpa_supplicant.conf +
-    post-down killall -q pa_supplicant +
-</code> +
- +
-Where INTERFACE is the name of your wireless interface.+
tech/rccar.1452292003.txt.gz · Last modified: 2016/01/08 22:26 (external edit)

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