From 1a582815ba218d2a9047abae92b9f33a3301ffd5 Mon Sep 17 00:00:00 2001
From: Jean-François Milants <jf@codingfield.com>
Date: Sun, 10 Jan 2021 17:57:26 +0100
Subject: First implementation of the HR sensor using 100% foss code (ported
 from waspos)

---
 src/components/heartrate/Ppg.h | 30 ++++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)
 create mode 100644 src/components/heartrate/Ppg.h

(limited to 'src/components/heartrate/Ppg.h')

diff --git a/src/components/heartrate/Ppg.h b/src/components/heartrate/Ppg.h
new file mode 100644
index 00000000..846ade08
--- /dev/null
+++ b/src/components/heartrate/Ppg.h
@@ -0,0 +1,30 @@
+#pragma once
+
+#include <array>
+#include "Biquad.h"
+#include "Ptagc.h"
+
+namespace Pinetime {
+  namespace Controllers {
+    class Ppg {
+    public:
+      explicit Ppg(float spl);
+
+      int Preprocess(float spl);
+      float HeartRate();
+
+      void SetOffset(uint16_t i);
+
+    private:
+      std::array<int, 200> data;
+      size_t dataIndex = 0;
+      float offset;
+      Biquad hpf;
+      Ptagc agc;
+      Biquad lpf;
+
+
+      float ProcessHeartRate();
+    };
+  }
+}
\ No newline at end of file
-- 
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