Changes between Version 2 and Version 3 of ventana/SplashScreen

Timestamp:

01/10/2018 01:09:01 AM (7 years ago)

Author:

Tim Harvey

Comment:

added image showing boot process timing

ventana/SplashScreen

@@ -8 +8 @@
 For each step in the typical boot process, a splash screen can usually be configured for the duration of its operation. For example, the IMX6 processor used on Ventana boards starts with a Primary Boot Loader (PBL) (this is firmware inside the IMX6 which can not be modified), a Secondary Program Loader (SPL) which configures DRAM and loads the main bootloader, then the OS kernel itself. The first place a splash screen can be configured is the bootloader where typically a static splash is displayed. This image can be switched out or left in place by the kernel. Finally, depending on the operating system, a dynamic animated splash may be enabled in early userspace init which leads to a GUI if available once init is complete.
 
-Where you want implement a splash screen depends on the desired effect. For example:
+[[Image(SplashScreensInTheBootProcess.png)]]
+ * Note: Times will vary depending based on hardware, OS, and configuration. Times shown are for the default development configuration without boot speed tuning.
+
+From the above timelines you can see where it may be most useful to implement a splash screen. For example:
  * if your intention is to provide feedback within the first second of power-up then you must do this in the bootloader (but be aware it will not persist for more than 1.5 seconds or so
  * if your intention is to provide feedback within the first 2 seconds then you'll get the most bang-for-your buck using a kernel splash