User Manual

AlphaBot User Manual

a) Run the command raspi-config to start up the camera before using it:

sudo raspi-config

Then, select the option Enable Camera.

b) For the camera with CSI interface, the system may be unable to find out the

device under the directory of /dev/video0. In this case, you should add a

line, bcm2835-v4l2, into the file /etc/modules.

sudo nano /etc/modules

Add the line:

bcm2835-v4l2

c) After reboot, the system will load the module name stored in this file, and find

out the device video0 under the directory of /dev. (Please take a notice that the

letter l in the command bcm2835-v4l2 is the lower case of L.)

d) Install dependent libraries:

sudo apt-get install libv4l-dev libjpeg8-dev

sudo apt-get install subversion

e) Compile the example:

cd ~/AlphaBot/mjpg-AlphaBot/mjpg-streamer

make USE_LIBV4L2=true clear all

During the make command running, you may see a warning: make: *** No rule to

make target 'clear'. Stop. This warning can be ignored.

f) If there is any error occurred, you can try to modify the content of the

file mjpg-streamer/plugins/input_uvc/input_uvc.c,

changing V4L2_PIX_FMT_MJPEG to V4L2_PIX_FMT_YUYV

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