Diff: max30102.h

Revision:

1:02f411fefe6f

Parent:

0:e1e1947a9882

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max30102.h	Tue Jun 21 09:43:15 2016 +0000
@@ -0,0 +1,150 @@
+/*
+ * Library for the Maxim MAX30102 pulse oximetry system, I modified a copy of the MAX30100 library in May 2016
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAX30102_H
+#define __MAX30102_H
+
+#include "mbed.h"
+
+
+/******************************************************************************/
+/*********** PULSE OXIMETER AND HEART RATE REGISTER MAPPING  **************/
+/******************************************************************************/
+
+// status registers
+#define MAX30102_INT_STATUS          0x00
+#define MAX30102_INT_ENABLE          0x02
+
+// FIFO registers
+#define MAX30102_FIFO_W_POINTER      0x04
+#define MAX30102_OVR_COUNTER         0x05
+#define MAX30102_FIFO_R_POINTER      0x06
+#define MAX30102_FIFO_DATA_REG       0x07
+
+// configuration registers
+#define MAX30102_FIFO_CONFIG         0x08
+#define MAX30102_CONFIG              0x09
+#define MAX30102_SPO2_CONFIG         0x0A
+#define MAX30102_LED_CONFIG_1        0x0C 
+#define MAX30102_LED_CONFIG_2        0x0D  
+
+// temperature registers
+#define MAX30102_TEMP_INTEGER        0x1F
+#define MAX30102_TEMP_FRACTION       0x20
+#define MAX30102_TEMP_CONFIG         0x21
+
+// PART ID registers
+#define MAX30102_REVISION_ID         0xFE
+#define MAX30102_PART_ID             0xFF
+
+#define I_AM_MAX30102                0x15
+
+/************************************** REGISTERS VALUE *******************************************/
+
+// I2C address
+#define MAX30102_ADDRESS             0xAE
+
+//Enable interrupts
+#define MAX30102_INT_ENB_A_FULL      ((uint8_t)0x80)
+#define MAX30102_INT_ENB_TEMP_RDY    ((uint8_t)0x40)
+#define MAX30102_INT_ENB_HR_RDY      ((uint8_t)0x20)
+#define MAX30102_INT_ENB_SO2_RDY     ((uint8_t)0x10)
+
+//Mode configuration
+#define MAX30102_MODE_SHDN           ((uint8_t)0x80)      // Bit 7 high
+#define MAX30102_MODE_RESET          ((uint8_t)0x40)      // Bit 6 high
+#define MAX30102_MODE_TEMP_EN        ((uint8_t)0x01)
+#define MAX30102_MODE_HR             ((uint8_t)0x02)
+#define MAX30102_MODE_SPO2           ((uint8_t)0x03)
+
+//SPO2 configuration
+#define MAX30102_SPO2_HI_RES_EN           ((uint8_t)0x40)
+
+typedef enum{ // This is the same for both LEDs
+    pw68,     // 68us pulse, ADC 15
+    pw118,    // 118us pulse, ADC 16
+    pw215,    // 215us pulse, ADC 17
+    pw411     // 411us pulse, ADC 18
+}pulseWidth;
+
+typedef enum{
+    sr50,    // 50 samples per second
+    sr100,   // 100 samples per second
+    sr200,   // 200 samples per second
+    sr400,   // 400 samples per second
+    sr800,   // 800 samples per second
+    sr1000   // 1000 samples per second
+}sampleRate;
+
+typedef enum{
+    i0,    // No current
+    i4,    // 4.4mA
+    i8,    // 7.6mA
+    i11,   // 11.0mA
+    i14,   // 14.2mA
+    i17,   // 17.4mA
+    i21,   // 20.8mA
+    i27,   // 27.1mA
+    i31,   // 30.6mA
+    i34,   // 33.8mA
+    i37,   // 37.0mA
+    i40,   // 40.2mA
+    i44,   // 43.6mA
+    i47,   // 46.8mA
+    i50    // 50.0mA
+}ledCurrent;
+
+typedef enum{
+    low,    // low resolution SPO2
+    high    // high resolution SPO2 (18 bit with 411us LED pulse width)
+}high_resolution;
+
+typedef enum
+{
+    OXIMETER_OK = 0,
+    OXIMETER_ERROR = 1,
+    OXIMETER_TIMEOUT = 2,
+    OXIMETER_NOT_IMPLEMENTED = 3
+} OXIMETER_StatusTypeDef;
+
+/**
+ * @brief  MAX30102 driver extended internal structure definition
+ */
+typedef struct
+{
+    OXIMETER_StatusTypeDef (*Enable_Free_Fall_Detection) (void);
+    OXIMETER_StatusTypeDef (*Disable_Free_Fall_Detection) (void);
+    OXIMETER_StatusTypeDef (*Get_Status_Free_Fall_Detection) (uint8_t *);
+} MAX30102_DrvExtTypeDef;
+
+class MAX30102 {
+public:
+        
+    /* Public Methods */
+    
+    uint32_t HR;      // Last heart rate datapoint
+    uint32_t SPO2;    // Last oximetry datapoint
+    
+    void  setLEDs(pulseWidth pw, ledCurrent red, ledCurrent ir);  // Sets the LED state
+    void  setSPO2(sampleRate sr, high_resolution hi_res); // Setup the SPO2 sensor, disabled by default
+    int   getNumSamp(void);       // Get number of samples
+    void  readSensor(void);       // Updates the values
+    void  shutdown(void);   // Instructs device to power-save
+    void  reset(void);      // Resets the device
+    void  startup(void);    // Leaves power-save
+    char  getRevID(void);   // Gets revision ID
+    char  getPartID(void);  // Gets part ID
+    void  begin(pulseWidth pw = pw411,  // Longest pulseWidth
+                ledCurrent ir = i50,    // Highest current
+                sampleRate sr = sr100); // 2nd lowest sampleRate
+    void  init(pulseWidth pw, sampleRate sr, high_resolution hi_res, ledCurrent red, ledCurrent ir);
+    void  setTemp(void);
+    int   readTemp(void);
+    void  setSPO2mode(void);
+    void  setInterruptSPO2(void);
+    void  printRegisters(void); // Dumps contents of registers for debug
+};
+
+#endif /* __MAX30102_H */
\ No newline at end of file