Display
Overview
This sample will draw some basic rectangles onto the display. The rectangle colors and positions are chosen so that you can check the orientation of the LCD and correct RGB bit order. The rectangles are drawn in clockwise order, from top left corner: red, green, blue, grey. The shade of grey changes from black through to white. If the grey looks too green or red at any point or the order of the corners is not as described above then the LCD may be endian swapped.
On displays with the SCREEN_INFO_X_ALIGNMENT_WIDTH capability,
such as those using the sharp,ls0xx driver, it is only possible
to draw full lines at a time. On these displays, the rectangles described above
will be replaced with bars that take up the entire width of the display. Only
the green and grey bar will be visible.
On monochrome displays, the rectangles (or bars) will all be some shade of grey.
On displays with 1 bit per pixel, the greyscale animation of the bottom rectangle (or bar) will appear as flickering between black and white.
Building and Running
As this is a generic sample it should work with any display supported by Zephyr.
Below is an example on how to build for a nRF52840 DK board with a Adafruit 2.8” TFT Touch Shield v2.
west build -b nrf52840dk/nrf52840 --shield adafruit_2_8_tft_touch_v2 samples/drivers/display
For testing purpose without the need of any hardware, the native_sim board is also supported and can be built as follows;
west build -b native_sim samples/drivers/display