Diff: pixart_heart_rate.h

Revision:

0:31d7988294aa

Child:

1:e9f4fb198b63

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/pixart_heart_rate.h	Fri Oct 27 05:55:57 2017 +0000
@@ -0,0 +1,101 @@
+#ifndef __pixart_heart_rate_h__
+#define __pixart_heart_rate_h__
+
+
+#include "pah8series_data_c.h"
+
+#include <vector>
+#include <deque>
+#include <stdint.h>
+
+
+namespace pixart {
+    
+    
+    class heart_rate {
+    public:
+        typedef uint64_t (*TIME_TO_MILLISEC_HANDLE)(uint64_t time);
+    
+        enum gravity_mode {
+            gravity_2g  = 2,
+            gravity_4g  = 4,
+            gravity_8g  = 8,
+            gravity_16g = 16,
+        };
+        
+        enum ret_msg {
+            ret_not_ready,
+            ret_success,
+            ret_no_touch,
+            ret_signal_poor,
+            ret_fail,
+        };
+        
+        struct ppg_sample {
+            int32_t     ch1;
+            int32_t     ch2;
+            bool        is_touched;
+            uint64_t    timestamp;
+        };
+        
+        struct accel_sample {
+            float       x;
+            float       y;
+            float       z;
+            uint64_t    timestamp;
+        };
+        
+        struct result {
+            ret_msg ret;
+            float   hr;
+            int     hr_trust_level;  
+        };
+    
+    public:
+        heart_rate(TIME_TO_MILLISEC_HANDLE time_to_millisec_handler, size_t ppg_max_sample_num = 40, size_t accel_max_sample_num = 100);
+        ~heart_rate();
+        
+        bool    init(gravity_mode gravity = gravity_4g);
+        
+        void    reset();
+        
+        bool    set_ppg_sample(const ppg_sample &ppg_sample);
+        bool    set_accel_sample(const accel_sample &accel_sample);
+        
+        const result&   get_result() const;
+        
+        
+    private:
+        static int gravity_to_hr_alg_gsensor_mode(gravity_mode gravity);
+        static int16_t gravity_to_int16(gravity_mode gravity, float value);
+    
+        static const float GRAVITY_OF_EARTH;
+        static const size_t PPG_SYNC_COUNT;
+        static const size_t ACCEL_AXIS_NUM;
+    
+    private:
+        void flush();
+    
+        const size_t                PPG_MAX_SAMPLE_NUM;
+        const size_t                PPG_CH_NUM;
+        const size_t                ACCEL_MAX_SAMPLE_NUM;
+        
+        TIME_TO_MILLISEC_HANDLE     m_time_to_millisec_handler;
+        void                        *m_alg_buffer;
+        gravity_mode                m_gravity_mode;
+        
+        std::deque<ppg_sample>      m_ppg_sample_queue;
+        std::deque<accel_sample>    m_accel_sample_queue;
+        
+        uint64_t                    m_last_report_timestamp;
+        uint8_t                     m_frame_count;
+        
+        result                      m_result;
+
+    };
+
+
+}
+
+
+#endif // header guard