VisualDSP++ 4.5 Loader and Utilities Manual - Analog Devices

ADSP-21161 Processor Booting
Link Boot. The default boot kernel source file for link booting is
161_link.asm. After copying the default file to my_link.asm and modifying
it to suit your system, use the following command lines to rebuild the
boot kernel.
easm21k -proc ADSP-21161 my_link.asm
linker -T 161_ldr.ldf my_link.doj
SPI Boot. The default boot kernel source file for link booting is
161_SPI.asm. After copying the default file to my_SPI.asm and modifying
it to suit your system, use the following command lines to rebuild the
boot kernel:
easm21k -proc ADSP-21161 my_SPI.asm
linker -T 161_ldr.ldf my_SPI.doj
Loader File Issues
If you modify the boot kernel for the EPROM, host, SPI, or link booting
modes, ensure that the seg_ldr memory segment is defined in the .ldf
file. Refer to the source of this memory segment in the .ldf file located in
the …\ldr\ directory of the of the target processor.
Because the loader utility uses this address for the first location of the reset
vector during the boot-load process, avoid placing code at this address.
When using any of the processor’s power-up boot modes, ensure that this
address does not contain a critical instruction. Because this address is not
executed during the booting sequence, place a NOP or IDLE in this location.
The loader utility generates a warning if the vector address 0x40004 does
not contain NOP or IDLE.
� When
using VisualDSP++ to create the loader file, specify the
name of the customized boot kernel executable in the Kernel file
box on the Load page of the Project Options dialog box.
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