EarthLCD ezLCD-405, Manual

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e z L C D -­‐ 4 0 5 | 160
Rev.
© 2016 Earth Computers Tech. Inc.
1.7.66.1 ARC
Description: Draws an Arc in Current Color, with the center at Current Position, starting on
Begin Angle and ending on the End Angle.
Code: 2F hex, 47 dec
7 6 5 4 3 2 1 0
Byte 0: Command
Byte 1: Radius
Byte 2: Arc Begin Angle
Byte 3: Arc End Angle
See Also: SET_XY , SET_COLOR , CIRCLE_R
Angle Coding: The angle range is from 0 to 255.
To transform degrees to ARC angle units:
Angle_lcd = Angle_deg x 32 / 45
For example:
32 = 45°
64 = 90°
128 = 180°
192 = 270°
0 = 0° = 360°
The angle is drawn clockwise with the zero positioned at the top of a screen, as it is shown on
the picture below
ARCH
radius
begin_angle
end_angle