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FSK demod on MSP430

bhaktha Keshavachar
Intellectual 450 points

Hello,

I am looking for a FSK demodulator running on MSP430 for demodulating FSK signals in the audio band. TI has two app notes.

slaa037 - quadrature demod, assumes the analog signal is digitized at the appropriate frequency

slaa024 - measuring the "distance" between the zero cross-over points of the incoming signal and determining the frequency using timer logic

 For various reasons (cost, power and simplicity) we have decided to try the the slaa037 approach. Question to the community.

Any C code for quadrature demod ? The assembly code in slaa037 is rather crytpic. Any other fixed point FSK decoder capable of running on MSP430 ?

Thanks in advance.

Regards,

-Bhaktha

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