VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

Loader/Splitter for Blackfin Processors
ADSP-BF53x and ADSP-BF561/BF566
Multi-Application (Multi-DXE) Management
� This
section does not applies to ADSP-BF535 processors.
This section describes how to boot more than one .dxe file into an
ADSP-BF531/BF532/BF533/BF534/ BF536/BF537/BF538/BF539 and
ADSP-BF561/BF566 processor. The information presented in this section
applies to all of the named processors. For additional information on the
ADSP-BF561/BF566 processor, refer to “ADSP-BF561/BF566
Dual-Core Application Management” on page 2-50.
The ADSP-BF531/BF532/BF533/BF534/ BF536/BF537/BF538/BF539
and ADSP-BF561/BF566 loader file structure and the silicon revision of
0.1 and higher allow the booting of multiple .dxe files into a single
processor from external memory. As illustrated in Figure 2-32, each executable
file is preceded by a 4-byte count header, which is the number of
bytes within the executable, including headers. This information can be
used to boot a specific .dxe file into the processor. The 4-byte .dxe count
block is encapsulated within a 10-byte header to be compatible with the
silicon revision 0.0. For more information, see
“ADSP-BF531/BF532/BF533/BF534/BF536/BF537/BF538/ BF539
Blocks, Block Headers, and Flags” on page 2-33.
Booting multiple executables can be accomplished by one of the following
methods.
Use the second-stage loader switch, “-l userkernel.dxe”. This
option allows the use of your own second-stage loader.
After the second-stage loader gets booted into internal memory via
VisualDSP++ 4.5 Loader and Utilities Manual 2-51