Preparing the Display for Operation
Several steps need to be taken before the display will become operational. Some of these steps are display-specific. Supported Controllers/Panels section provides examples of startup code for each supported display.
Generally speaking, you need to take the following steps:
• Define which I/O lines and ports of your device control the display. This is done through the lcd.iomapping property.
• Configure some I/O lines/ports as outputs, as required for controlling your particular display. This is only necessary on platforms with explicit output buffer control . For more details see your device's platform documentation (for example, EM1000's is here ).
• Set the resolution of the display (lcd.width , lcd.height ). These values depend on the panel, not the controller, so they cannot be detected automatically. Your application needs to set them "manually".
• Set lcd.rotated = 1- YES if you wish the display image to be rotated 180 degrees (that is, the display of your device is installed up side down).
• Set lcd.inverted = 1- YES if you need to invert the image on the display (may be required for certain panels).
• Enable the display by setting lcd.enabled = 1- YES. This step will only work if your display is properly connected, correct display type is selected in your project, lcd.iomapping is set property, and necessary I/O lines are configured as outputs. The lcd.error R/O property will indicate 1- YES if there was a problem enabling the display.
• Enable, the backlight, if needed — this is not related to the controller/panel itself, but is still a necessary step. Light it up, don't linger in the dark!