There is only one file which gets uploaded to the Empeg. It's a single file containing the data for both the home and car images. It should be created all at once, with both the home and car bitmaps being used as the source files. The file format is literally:

"empg"+homedata+cardata=output.bin

The resulting output.bin file should be 4100 bytes long. Then you send output.bin into memory location a000 in flash, and you're done.

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Tony Fabris