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The bootloader of Trizeps VI and Trizeps VII can show a PNG-picture-file as splash-screen on the boot. For Trizeps VI you need to call the PNG in the autoboot.bat-script; i.e.:
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boot mmc boot.png |
For Trizeps VII you simply need to name the PNG boot.png and copy it to the boot SD-Card.
Samples for Trizeps-VII can be taken from this Archive: bootpngs-tr7.zip
Parameters
The display-timing configuration is stored in tEXt-chunks of the PNG-file. The horizontal/vertical size of the display is defined by the PNG-resolution.
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Sample PixelClock Frequency | |
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n | Frequency |
4 | 49500000 |
5 | 39500000 |
6 | 33000000 |
7 | 28285714 |
8 | 24750000 |
9 | 22000000 |
Tools
TweakPNG is a tool to modify PNG-chunk-data; including tEXt-chunks ( http://entropymine.com/jason/tweakpng/ )
RealWorld Paint is a paint program which can create APNG-files( http://www.rw-designer.com/image-editor )