13543ce048
pll update input is named "x" not "input"
2021-01-04 11:14:27 -08:00
Robert Jördens
cc42c0c477
iir_int: add optimized integer iir implementation
2020-12-22 16:49:12 +01:00
Robert Jördens
8d9af70c19
trig/atan2: refine
...
* use dynamic scaling of the inputs to get accurate ratios (effectively
floating point) to maintain accuracy for small arguments
* this also allows shifting later and keep more bits
* use u32 ratio to keep one more bit
* merge the corner case unittests into the big test value list
* print rms, absolute and axis-relative angle
* simplify the correction expression to get rid of one multiplication
* use 5 bit for the correction constant and 15 bits for r
* least squares optimal correction constant, this lowers the max error
below 5e-5
2020-12-20 21:07:23 +01:00
Robert Jördens
12d5945d81
dsp/testing: simplify
2020-12-20 20:23:32 +01:00
7e794373f4
atan2: fix output range description
2020-12-17 14:21:39 -08:00
17cf71f22b
atan2: replace min, max with x, y
2020-12-17 11:39:32 -08:00
9c5e68ceea
atan2: test min and max angle inputs
2020-12-17 11:34:39 -08:00
6ffc42021e
move atan2 test before cossin test to mimic function order
2020-12-17 10:09:12 -08:00
09a744f59c
dsp: move iir generic math functions to top-level module scope
2020-12-17 10:04:48 -08:00
56641d5838
atan2: specify why we cannot use more than 15 bits for the atan argument
2020-12-17 10:02:35 -08:00
1f28949bc5
atan2: store sign bits and greater of |x| and |y|
2020-12-17 09:47:39 -08:00
cb38c3e3bd
atan2: clarify sharing bits between atan argument and constant factors
2020-12-17 09:31:38 -08:00
5717991ada
atan2: result range is from i32::MIN+1 to i32::MAX
2020-12-17 09:31:18 -08:00
d7111a3aa8
dsp/trig: let compiler infer type parameter in atan2 abs call
2020-12-17 08:04:53 -08:00
d9d500743f
simplify atan initial angle expression
2020-12-17 08:02:54 -08:00
85ae70fe62
rename trig tests to delineate between cossin and atan2
2020-12-16 16:28:49 -08:00
7c4f608206
move cossin and atan2 into the same trig file
2020-12-16 16:26:44 -08:00
e257545321
fix formatting
2020-12-16 16:14:11 -08:00
5d055b01a0
dsp: add atan2
2020-12-16 16:02:42 -08:00
6d651da758
dsp: add f64 isclose testing function
2020-12-16 16:02:17 -08:00
17f9f0750e
dsp: move abs to lib.rs
2020-12-16 16:01:50 -08:00
e89db65722
rename trig.rs -> cossin.rs
2020-12-16 15:57:47 -08:00
Robert Jördens
469c89ea70
pll: refine gains
2020-12-14 09:58:27 +01:00
Robert Jördens
75c4120258
cossin: buffer test data output
2020-12-13 13:24:28 +01:00
Robert Jördens
7fa4b76e4d
cossin_table: fix build script usage
2020-12-10 17:17:09 +01:00
Robert Jördens
77cb0bbad0
cossin: refactor and tweak
...
* shrink the LUT by another bit
* correctly use the octant bit to offset the dphi to LUT entry midpoint
* add more diagnistics to the unittest and rewrite it in relative units
* MSB-align phase and output to match the PLL data, dynamic range and
remove the need for roudning bias.
* clean up the build.rs table generator a bit
2020-12-10 16:56:13 +01:00
a82b0f3e90
trig: fix formatting
2020-12-09 15:53:56 -08:00
4add34cf9a
add cossin LUT
2020-12-09 15:40:18 -08:00
Robert Jördens
2ae0bdfd8d
unwrap: comments, names
2020-12-06 17:07:38 +01:00
Robert Jördens
4cfe6ba416
pll: add note on dithering
2020-12-05 13:18:02 +01:00
Robert Jördens
974fa6e220
unwrap: clean up docs and names
2020-12-05 12:55:22 +01:00
Robert Jördens
526fea8e23
unwrap: more tests
2020-12-05 12:32:27 +01:00
Robert Jördens
941a94bbf6
dsp/pll: style
2020-12-05 11:44:09 +01:00
Robert Jördens
47806a155d
Merge branch 'master' into feature/unwrap
2020-12-05 09:58:15 +01:00
Robert Jördens
2179560a3c
unwrap: add phase unwrapping tools
2020-12-05 09:56:41 +01:00
Robert Jördens
628845d356
pll: rename to just PLL
2020-12-05 08:12:07 +01:00
Robert Jördens
0072cda85f
pll: add convergence test
2020-12-04 23:13:22 +01:00
43a760e57a
dsp testing: improve api for tolerance checking
2020-12-04 09:16:10 -08:00
55e7f1f0db
dsp: fix small comment grammar error
2020-12-04 09:16:10 -08:00
0cca4589fd
lockin: compute reference period from the closest 2 timestamps to the ADC sample
2020-12-04 09:16:10 -08:00
277a5d2d81
dsp: move common test code to testing.rs file
2020-12-04 09:16:09 -08:00
260206e4f0
dsp: implement Complex as type alias for tuple
2020-12-04 09:15:33 -08:00
d1b7efad48
dsp: replace in_phase and quadrature with Complex
2020-12-04 09:15:13 -08:00
fcdfcb0be7
lockin: use single iir instance for both in-phase and quadrature signals
2020-12-04 09:14:39 -08:00
785c98f93d
lockin: remove TIMESTAMP_BUFFER_SIZE constant
2020-12-04 09:14:39 -08:00
90ef9f1e6a
lockin: borrow adc samples and timestamps as slices
2020-12-04 09:14:39 -08:00
f259d6cf65
lockin: minor variable name changes
2020-12-04 09:14:39 -08:00
9592bb74a7
lockin: change zip order in decimate for clarity
2020-12-04 09:14:39 -08:00
4edda09d86
lockin: change demodulate to return result instead of option
2020-12-04 09:14:39 -08:00
da4430e912
lockin: add documentation explaining timestamp decrement
2020-12-04 09:14:39 -08:00
Matt Huszagh
Robert Jördens