diff options
author | Jean-François Milants <jf@codingfield.com> | 2021-01-10 17:57:26 +0100 |
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committer | Jean-François Milants <jf@codingfield.com> | 2021-01-10 17:57:26 +0100 |
commit | 1a582815ba218d2a9047abae92b9f33a3301ffd5 (patch) | |
tree | 18aa0aeba146d990a0302f4840e870cad1c4ad6f /src/components/heartrate/Biquad.h | |
parent | 50ae0ae5e073ac48652e6c26549f9b19655e8da3 (diff) |
First implementation of the HR sensor using 100% foss code (ported from waspos)
Diffstat (limited to 'src/components/heartrate/Biquad.h')
-rw-r--r-- | src/components/heartrate/Biquad.h | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/components/heartrate/Biquad.h b/src/components/heartrate/Biquad.h new file mode 100644 index 00000000..dc9b97f6 --- /dev/null +++ b/src/components/heartrate/Biquad.h @@ -0,0 +1,22 @@ +#pragma once + +namespace Pinetime { + namespace Controllers { + /// Direct Form II Biquad Filter + class Biquad { + public: + Biquad(float b0, float b1, float b2, float a1, float a2); + float Step(float x); + + private: + float b0; + float b1; + float b2; + float a1; + float a2; + + float v1 = 0.0f; + float v2 = 0.0f; + }; + } +} |