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Registered Member #30
Joined: Fri Feb 03 2006, 10:52AM
Location: Glasgow, Scotland
Posts: 6706
That's good, you've fixed one layer of bugs, now you can start on the next one I suggest making the simplest blinky LED test program possible to load into the ADSP, then experiment with all the different byte ordering and packing options.
On the DSPs I've used, I had to run the object code from the DSP compiler through a tool that embeds it in a secondary bootloader before packing the 24- or 32-bit DSP instruction words into bytes. The secondary bootloader is needed (and provided by the chip vendor) because the DSP just reads a small segment from the flash. That segment has to contain the code to load the remainder of the program from flash.
There are several ways this can go wrong, for instance the byte ordering can get flipped as it goes through the STM32, or you might have forgotten to add the secondary bootloader or set its options up wrongly.
Registered Member #1143
Joined: Sun Nov 25 2007, 04:55PM
Location: Vilnius, Lithuania
Posts: 721
Steve Conner wrote ...
That's good, you've fixed one layer of bugs, now you can start on the next one I suggest making the simplest blinky LED test program possible to load into the ADSP, then experiment with all the different byte ordering and packing options.
Yes, i have simple PLL config, and FLAG toggle. I am using VisualDSP+ to generate loader file , and in loader options i try from spi slave, spi master to PROM, and all others, also try to inverse bite order (made simple mirror table)for data in flash, still no life from adsp. I have all right power up sequence...
Steve Conner wrote ...
On the DSPs I've used, I had to run the object code from the DSP compiler through a tool that embeds it in a secondary bootloader before packing the 24- or 32-bit DSP instruction words into bytes. The secondary bootloader is needed (and provided by the chip vendor) because the DSP just reads a small segment from the flash. That segment has to contain the code to load the remainder of the program from flash.
VisualDSP+ should take care all that jazz, it should be just upload and go ( well, as far as i know )
Steve Conner wrote ...
There are several ways this can go wrong, for instance the byte ordering can get flipped as it goes through the STM32, or you might have forgotten to add the secondary bootloader or set its options up wrongly.
When i program, i check if all data is the same, if not i erase page, and rewrite data. All try and MSBF and LSBF data writing to flash, same effect
Here is powerup sequence: (RESET s green, Vint is yellow, Vext is Blue)
from adsp pdf
Hey, finally my DSP is working, just to show that it can only do 33MHz gpio toggle , and since i need lot of i/o for my work, bottleneck will be i/o, not calculation power, oh, that's fun
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