VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

FLASH MEMORY
INIT CODE HEADER
INIT CODE
PAYLOAD
(KERNEL AND
DECOMPRESSION
ENGINE)
COMPRESSED
HEADER
COMPRESSED
IMAGE PAYLOAD
FINAL SECTION
HEADER
FINAL PAYLOAD
(OVERWRITES LOCA-
TION FROM WHICH
INIT CODE EXE-
CUTES)
1
2
3A
4
Loader/Splitter for Blackfin Processors
BOOT ROM
L1 MEMORY
INITIALIZATION
KERNEL AND
DECOMPRESSION
ENGINE
DECOMPRESSION
WINDOW
BOOT ROM BOOTS
FINAL PAYLOAD, OVER-
WRITING INITIALIATION
KERNEL AND
DECOMPRESSION WINDOW
IN L1, THEN JUMPS TO EVT1
DECOMPRESSED
STREAM IN PARTS
BOOTS INTO VARIOUS
MEMORIES THROUGH
INIT KERNEL IN PARTS
Figure 2-37. ADSP-BF531/BF532/BF533/BF534/BF536/BF537 Compressed
Stream: Booting Sequence
files, which the loader utility uses if no other initialization file is specified.
The default decompression initialization file is stored in the …\Blackfin\ldr\zlib
subdirectory of the installation directory. The default
decompression initialization file is built for the compression window size
of 9 bits.
To use a different compression window size, build your own decompression
initialization file. For details, refer to the readme.txt file located in
…\Blackfin\ldr\zlib\src subdirectory of the VisualDSP++ 4.5 installation
directory. The size can be changed through the loader property page
or -compressWS # command-line switch. The valid range for the window
size is [8, 15] bits.
VisualDSP++ 4.5 Loader and Utilities Manual 2-61
3B