Lcd Functions Overview


Lcd functions allow scripts to interact with the transmitter display. This access is limited to the 'run' functions of One-Time and Telemetry scripts. Widget scripts on the Horus (X10 and X12S) can make use of the lcd functions as well.


The run function is periodically called when the screen is visible. In OpenTX 2.0 each invocation starts with a blank screen (unless lcd.lock() is used). Under OpenTX 2.1 screen state is always persisted across calls to the run function. Many scripts originally written for OpenTX 2.0 require a call to lcd.clear() at the beginning of their run function in order to display properly under 2.1 and 2.2.

Many of the lcd functions accept parameters named flags and patterns. The names and their meanings are described below.

Flags Constants

Name Description Version Notes
0 normal font, default precision for numeric
DBLSIZE double size font
MIDSIZE mid sized font
SMLSIZE small font
INVERS inverted display
BLINK blinking text
XXLSIZE jumbo font 2.0.6
LEFT left justify 2.0.6 Default for most functions not related to bitmaps
RIGHT right justify
PREC1 single decimal place
PREC2 two decimal places
GREY_DEFAULT grey fill
TIMEHOUR dislay hours Only for drawTimer

Patterns Constants

Name Description
FORCE pixels will be black
ERASE pixels will be white
DOTTED lines will appear dotted

Screen Constants

Name Description
LCD_W width in pixels
LCD_H height in pixels

Screen Information

Radio LCD_W LCD_H Colours
X7 128 64 1 bit
X9D 212 64 4 bit
X9D+ 212 64 4 bit
X9E 212 64 4 bit
X10 480 272 RGB565
X12S 480 272 RGB565

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