3. Working principles
3.1. Embedded processor and memory
Like all the Yoctopuce modules, your Yocto-Display contains an embedded processor allowing it to
perform relatively complex operations transparently. Thus, to draw a line, the host computer only
needs to send a
draw a line
command to the Yocto-Display. It does not have to do anything else,
everything is managed by the Yocto-Display processor. For this reason, the Yocto-Display behaves a
little like a graphic accelerator where the graphical tasks are performed by a dedicated processor,
letting the main processor perform other tasks.
Your Yocto-Display contains also a small file system to help you store some graphics, fonts, and
other animations.
3.2. Orientation
To facilitate its hardware installation, your Yocto-Display can work in four distinct orientations. You
only need to set a single parameter. When you set the value of this parameter to
left
,
up
,
right
, or
down
to indicate the position of the USB socket with regards to the circuit, the screen rotates its
content in order for it to appear in the correct orientation.
Parameter values LEFT, UP, RIGHT, and DOWN influence the orientation of the display.
This parameter is persistent and can be saved in the flash memory of the Yocto-Display.
3.3. Layer system
Your Yocto-Display works according to a principle of superposed and independent layers. You can
write and draw independently in each of the 5 layers. This allows you to simplify and optimize your
display code.
www.yoctopuce.com
7
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