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Kernel timeouts have always been a 32 bit integer despite the existence of generation macros, and existing code has been inconsistent about using them. Upcoming commits are going to make the timeout arguments opaque, so fix things up to be rigorously correct. Changes include: + Adding a K_TIMEOUT_EQ() macro for code that needs to compare timeout values for equality (e.g. with K_FOREVER or K_NO_WAIT). + Adding a k_msleep() synonym for k_sleep() which can continue to take integral arguments as k_sleep() moves away to timeout arguments. + Pervasively using the K_MSEC(), K_SECONDS(), et. al. macros to generate timeout arguments. + Removing the usage of K_NO_WAIT as the final argument to K_THREAD_DEFINE(). This is just a count of milliseconds and we need to use a zero. This patch include no logic changes and should not affect generated code at all. Signed-off-by: Andy Ross <andrew.j.ross@intel.com> |
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.. _display-sample: Display Sample ############## 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. 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 :ref:`nrf52840dk_nrf52840` board with a :ref:`adafruit_2_8_tft_touch_v2`. .. zephyr-app-commands:: :zephyr-app: samples/drivers/display :board: nrf52840dk_nrf52840 :goals: build :shield: adafruit_2_8_tft_touch_v2 :compact: For testing purpose without the need of any hardware, the :ref:`native_posix` board is also supported and can be built as follows; .. zephyr-app-commands:: :zephyr-app: samples/drivers/display :board: native_posix :goals: build :compact: List of Arduino-based display shields ************************************* - :ref:`adafruit_2_8_tft_touch_v2` - :ref:`ssd1306_128_shield` - :ref:`st7789v_generic` - :ref:`waveshare_e_paper_raw_panel_shield`