Studio Technologies 5154 - Manual (Page 24)

Issue 3, September 2013 Model 5154 User Guide
Page 24 Studio Technologies, Inc.
Model 5154
Video Generator/Audio De-Embedder Module
applications will create .bmp files that meet
this requirement. But some other programs
may produce non-compatible files. For ex-
ample, the open-source GIMP graphics pro-
gram is very good but appears to save .bmp
files only as a BITMAPV4HEADER type.
These are not compatible with the Model
5154. The possibility that various .bmp files
will have different header types doesn’t
seem to be an issue for displaying them
successfully with most personal-computer
programs. This is most likely due to the PC’s
large code space allowing essentially all the
possible header types to be supported. But
the Model 5154, due to its target applica-
tion, has limitations in the file support area.
(For additional background information,
please refer to the Wikipedia online entry
that discusses the structure of .bmp files.)
A compatible 1280 x 720 (“720”) .bmp
file created using Microsoft Paint or Adobe
Photoshop will have a size of approximately
2.63 MB; a 1920 x 1080 (“1080”) .bmp file
will have a size of approximately 5.63 MB.
The actual size of the files when created in
Microsoft Paint should be 2,764,854 bytes
and 6,220,854 bytes, respectively. When
created in Adobe Photoshop, the file sizes
should be 2,764,856 bytes and 6,220,856
bytes, respectively. (Why are they each
two bytes in size different? Who knows!
But both use the appropriate BITMAPINFO-
HEADER DIB type.)
Bitmap Image Update
Procedure
It’s expected that the Model 5154’s bitmap
(.bmp) files associated with the custom
“720” and “1080” images will always be
updated to best serve specific applications.
This will typically take place soon after a
Model 5154 has been installed. (While the
pre-loaded images are nice, they aren’t
really appropriate for actual active applica-
tions.) There’s no problem changing the
files whenever the application warrants
alternate images. The module has the
ability to automatically load revised files
by way of its USB interface. The Model
5154 implements a USB host function
that directly supports connection of a
USB flash drive.
Updating the Model 5154’s “720” and
“1080” images is quite simple but requires
some care. The process begins by pre-
paring a USB flash drive. The flash drive
doesn’t have to be empty (blank) but must
be in the personal-computer-standard
FAT32 format. Save the new image (.bmp)
files in the root directory. Their names
must be img720.bmp and img1080.bmp.
Typically both .bmp files will be updated at
the same time. But there’s no requirement
to do so. Individual files can be updated
whenever desired. Simply copy the desired
file or files to the root directly on the USB
flash drive. Be certain that there are no
Model 5154 firmware files (m5154.s19 and
m5154.bit) present on the USB flash drive
during this process.
As previously reviewed in this guide, the
1280 x 720 image must have a file name of
img720.bmp; the 1920 x 1080 image must
have a file name of img1080.bmp. Also
ensure that both have the DIB header type
BITMAPINFOHEADER so that they can be
recognized correctly by the Model 5154.
To install the new image files:
1. Power down the Model 5154 module.
2. Insert the prepared USB flash drive into
the module’s USB port.
3. Apply power to the module.