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libdsp: update some comments

This commit is contained in:
raiden00pl 2021-03-30 18:30:30 +02:00 committed by Xiang Xiao
parent 781cd3f65b
commit 61389ad616
3 changed files with 13 additions and 16 deletions
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5
libs/libdsp/Kconfig
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@ -26,8 +26,9 @@ config LIBDSP_PRECISION
---help--- ---help---
With this option we can select libdsp precision for With this option we can select libdsp precision for
some of calculations. There are 3 available options: some of calculations. There are 3 available options:
0 - the fastest calculation but the lowest precision 0 - the fastest calculation but the lowest precision,
1 - a little better precision than above, but slowest 1 - increased precision than for option 0 at the expense
of a longer execution time,
2 - the most accuracte but the slowest one, use standard math functions. 2 - the most accuracte but the slowest one, use standard math functions.
config LIBDSP_FOC_VABC config LIBDSP_FOC_VABC

12
libs/libdsp/lib_misc.c
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@ -169,8 +169,6 @@ void dq_saturate(FAR dq_frame_f32_t *dq, float max)
* Description: * Description:
* Fast sin calculation * Fast sin calculation
* *
* Reference: http://lab.polygonal.de/?p=205
*
* Input Parameters: * Input Parameters:
* angle - (in) * angle - (in)
* *
@ -228,12 +226,11 @@ float fast_cos(float angle)
* Name: fast_sin2 * Name: fast_sin2
* *
* Description: * Description:
* Fast sin calculation with better accuracy * Fast sin calculation with better accuracy (quadratic curve
* * approximation)
* Reference: http://lab.polygonal.de/?p=205
* *
* Input Parameters: * Input Parameters:
* angle * angle - (in)
* *
* Returned Value: * Returned Value:
* Return estimated sine value * Return estimated sine value
@ -287,7 +284,8 @@ float fast_sin2(float angle)
* Name:fast_cos2 * Name:fast_cos2
* *
* Description: * Description:
* Fast cos calculation with better accuracy * Fast cos calculation with better accuracy (quadratic curve
* approximation)
* *
* Input Parameters: * Input Parameters:
* angle - (in) * angle - (in)

12
libs/libdsp/lib_misc_b16.c
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@ -196,8 +196,6 @@ void dq_saturate_b16(FAR dq_frame_b16_t *dq, b16_t max)
* Description: * Description:
* Fast sin calculation * Fast sin calculation
* *
* Reference: http://lab.polygonal.de/?p=205
*
* Input Parameters: * Input Parameters:
* angle - (in) * angle - (in)
* *
@ -261,12 +259,11 @@ b16_t fast_cos_b16(b16_t angle)
* Name: fast_sin2_b16 * Name: fast_sin2_b16
* *
* Description: * Description:
* Fast sin calculation with better accuracy * Fast sin calculation with better accuracy (quadratic curve
* * approximation)
* Reference: http://lab.polygonal.de/?p=205
* *
* Input Parameters: * Input Parameters:
* angle * angle - (in)
* *
* Returned Value: * Returned Value:
* Return estimated sine value * Return estimated sine value
@ -282,7 +279,8 @@ b16_t fast_sin2_b16(b16_t angle)
* Name:fast_cos2_b16 * Name:fast_cos2_b16
* *
* Description: * Description:
* Fast cos calculation with better accuracy * Fast cos calculation with better accuracy (quadratic curve
* approximation)
* *
* Input Parameters: * Input Parameters:
* angle - (in) * angle - (in)