Screen-Aspect-Ratio - SpinetiX HMP Series Technical Documentation Manual

H MP Conf iguration API - SpinetiX Technical Documentation v3.1

, use one of the following:
type
o "cvt-R" for CVT with "reduced blanking", normally OK with LCD or plasma.
o "cvt" for the CVT compatible with CRT tech we need a longer blanking.
o "cvt-Rom" is like "cvt-R" but with margins and more around the active part of the
image, to try if "cvt-R" does not work well.
o "m-cvt" is like "cvt" but with margins more.

attribute should always be "p".
interlace

aspect_ratio
/ unknown.
For example: "1024 768 60 cvt-R p 0:0" would select 1024x768 @ 60 Hz for LCD panels with automatic
aspect ratio.
Fixed mode
Fixed modes are fully specified by the user using:
<display-custom-video-mode>width height refresh LM RM UM BM HS VS HP VP
interlace aspect_ratio</display-custom-video-mode>
The additional fields are thus:

- Left-margin, number of pixel clocks between the horizontal sync end & the first active
LM
pixel, decimal integer; In VESA standard this is known as the horizontal back porch.

- Right-margin, number of pixel clocks between the last active pixel and the end of the video
RM
line; decimal integer; In VESA standard this is known as the horizontal front porch.

- Upper-margin, number of video lines between the vertical sync end & the first active line;
UM
decimal integer; In VESA standard this is known as the vertical back porch.

- Lower-margin, number of video lines between the last active line and the end of the video
BM
frame; decimal integer; In VESA standard this is known as the vertical front porch.

- Horizontal sync duration in pixel clocks.
HS

- Vertical sync duration in video lines.
VS

- Horizontal sync polarity, either the + or - character (i.e. high or low active, respectively).
HP

- Vertical sync polarity, either the + or - character (i.e. high or low active, respectively).
VP
So, for the standard VGA 640x480, the string is: "640 480 60 48 16 33 10 96 2 -- p 4:3" (note, there is
no space between the + or - characters used for the sync).
For instance, to set up the display to use 480p custom video mode, use:
<display-custom-video-mode>720 480 60 60 16 30 9 62 6 – p 16:9 </display-
custom-video-mode>
<screen-aspect-ratio>
HMP300 and HMP350 only
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should be one of the following: "16:9", "4:3", "4:10" or "0:0" or blank for auto
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