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5e36a64acb
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now printf is disabled if twiddles arrays are external. Now while used for emdedded there is no prfintf garbage in compiled code.
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2025-10-09 15:38:10 +03:00 |
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86f488e456
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replaced twiddles arrays definition by lazy definition (via macros and #ifndef)
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2025-10-09 14:41:57 +03:00 |
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1256c9b807
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added fft_twiddle_gen func that calculates twiddles inside provided arrays
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2025-10-09 14:34:57 +03:00 |
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e7cec37ac5
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moved python3 prototyping to the python folder
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2025-10-09 13:47:29 +03:00 |
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aa5945e8b2
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added phase calculation (dummy, always return 0) in imagery2abs. Added FFT_Re, FFT_Im dumping to the output file. Possible issue: phase of simple sin is -1.
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2025-10-09 13:26:20 +03:00 |
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73857920b4
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scaled FFT result down by DATA_L (normalisation)
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2025-10-09 13:15:10 +03:00 |
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580ba1f9f6
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replaced huge 2d twiddle arrays by smaller 1d arrays. Now it uses very low memory
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2025-10-09 13:11:36 +03:00 |
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f54daffb72
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added precalculated twiddles table, fixed accuracy issues (switched from int32 to int64). Now FFT working correctly
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2025-10-08 22:33:32 +03:00 |
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1a9f820724
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created C folder with FP_math.c, Makefile and plotter. FP_math have a FFT realisation with fixed-point math, and its tester
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2025-10-08 21:55:23 +03:00 |
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9c30fc4405
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moved fixed-point trigonometry to a separate file
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2025-10-08 19:07:22 +03:00 |
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fffe096312
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Patched FFT_arr_inplace(). Now it uses only simple arrays. re and im are stored like arr[2*i] = re, arr[2*i + 1] = im
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2025-10-08 18:12:16 +03:00 |
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ae9868b233
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implemented in-place FFT c-style. (by ChatGPT)
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2025-10-08 18:03:44 +03:00 |
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59f99cc466
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implemented in-place FFT c-style. (by ChatGPT)
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2025-10-08 18:01:08 +03:00 |
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db305dbfda
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impemented FFT with numpy and recursion
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2025-10-08 16:24:04 +03:00 |
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9a8f75de19
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impemented FFT with numpy and recursion
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2025-10-08 16:23:27 +03:00 |
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601817e2b3
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implemented FFT wrapper in naive_DFT.py. It imports FFT func from FFT.py and calculates data throw it
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2025-10-08 16:14:59 +03:00 |
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d15f940da6
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implemented FFT_naive function. It just calculated DFT inside. But DFT should be substituted by FFT function (its only arg -- inp arr. It returns F(k))
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2025-10-08 15:55:22 +03:00 |
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03486b80e0
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created and debugged precise fixed-pint sin and cos
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2025-10-07 19:22:47 +03:00 |
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c067cab219
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initial commit. There is DFT and DFT_fixed_point implemented. Now fixed-point SIN is testing
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2025-10-07 16:42:47 +03:00 |
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