propeller-dsp-spin

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This is a P8X32A/Propeller, P2X8C4M64P/Propeller 2 library of DSP routines.

IMPORTANT: This software is meant to be used with the spin-standard-library (P8X32A) or p2-spin-standard-library (P2X8C4M64P). Please install the applicable library first before attempting to use this code, otherwise you will be missing several files required to build the project.

Salient Features

P1:

• FFT/Fast Fourier Transform, default 1024-point (PASM: ~34ms using original test input data)

P2:

• FFT/Fast Fourier Transform, default 1024-point (SPIN2: ~10ms using original test input data)

Requirements

P1/SPIN1:

• spin-standard-library
• Memory: FFT-N points longs * 2 (e.g., 1024-point FFT requires 1024 * 4 * 2 = 8192bytes)

P2/SPIN2:

• p2-spin-standard-library
• Memory: FFT-N points longs * 2 (e.g., 1024-point FFT requires 1024 * 4 * 2 = 8192bytes)

Compiler Compatibility

Processor	Language	Compiler	Backend	Status
P1	SPIN1	FlexSpin (6.1.1)	Bytecode	OK
P1	SPIN1	FlexSpin (6.1.1)	Native/PASM	OK
P2	SPIN2	FlexSpin (6.1.1)	NuCode	Builds, doesn't run
P2	SPIN2	FlexSpin (6.1.1)	Native/PASM2	OK

(other versions or toolchains not listed are not supported, and may or may not work)

Limitations

• Very early in development - may malfunction, or outright fail to build
• TBD

Acknowledgements

• dsp.fft.spin[2]: Based on Michael Rychlik (heater)'s heater_fft.spin