Hello to all,
I m working on ADSP BF538. Being the part of project i would like to write the Board Bring Up(BBU) Software for the DSP Board. As this is first time i m dealing with DSP and BBU as well, i a m looking for any help frm all. Please guide me. If any one is working on the same DSP, please let me know.Atleast tell me how to start the approach of writing the BBU for the specified DSP. Thanks in advance...........
With Best egards, Nutty
Well, what is unique about your board that needs bringing up?
We just did a BF538 project, but it uses on-chip peripherals exclusively, so it was just a matter of providing the JTAG interface for the ICE in the hardware in order to bring it up.
The only special software required is the loader for the EEPROM chip that holds the firmware. With the -BF538F, ADI provides the loader for the EEPROM that's inside the package. For the non-F version, you can either use the same chip externally -- and the same loader module -- or you can switch to a different chip, and then you need to customize the loader module a bit. Not a big deal.
Our application software is written in C++ using the ADI compiler, in conjunction with their VDK kernel and System Services. Software development and debugging in the VisualDSP++ environment "just works".
Does this help?
-- Dave Tweed
Thanks a lot !!!! Could u please share ur loader module?? So that i can get some idea abt the boot loader. I don't have any knowledge on boot loader. In BF538, there r different booting methods. How to select the perticular method. Like which one is best? On wht basis should i come up with perticular method? Please guide me..... Nutty
No, sorry, our custom loader was done as work-for-hire, and I can't share it. But the stanard ADI loaders can be found in your VisualDSP install directory:
.../VisualDSP_4.5/Blacfkin/Flash Programmer Drivers/...
It really depends on the context in which the Blackfin is used.
If it is running more or less standalone, you'll want to boot it from a flash chip, either 8-bit parallel or serial SPI, depending on code size and cost constraints. For example, our design prototype uses the
8-bit parallel flash built into the -BF538F, but to save a couple of pennies, the production unit uses a -BF533 booted from SPI flash.If it is always operating directly attached to another processor that has flash memory of its own (even another Blackfin), it may be worthwhile to store the Blackfin code in the host processor's flash and do a host boot of the Blackfin.
If you need the absolutely quickest start-up, you may want to put the code in 16-bit wide external flash attached directly to the Blackfin memory bus and operate in the "no-boot" mode.
-- Dave Tweed
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