On Jun 11, 2006, at 9:41 AM, Matthew J Whelan wrote:
I don't think there is an interface, but using the hardware
multiplier is a rather easy task to figure out. I haven't used it
for FFT, but I have implemented digital filtering without any
issues. You should check out the TI application note on the
hardware multiplier for info on how to use it and source code for
FFT calculations:
http://focus.ti.com/lit/an/slaa042/slaa042.pdf
When compiling for MSP430 platforms, the TinyOS build chain tells gcc
to not use the multiply instruction. There's nothing wrong with the
instruction; rather, gcc has some bugs when generating code that uses
it. Therefore, I'd guess that assembly hacking would work fine, but
trying to do it through C will run into issues.
Phil
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