Revision 0:e1e1947a9882, committed 2016-04-03

Comitter:

ajeje41

Date:

Sun Apr 03 13:43:19 2016 +0000

Commit message:

StepOne (store accelerometer value)

Changed in this revision

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max30100.cpp	Sun Apr 03 13:43:19 2016 +0000
@@ -0,0 +1,167 @@
+/*
+ Library for the Maxim MAX30100 pulse oximetry system
+ */
+
+#include "max30100.h"
+#include "functions.h"
+
+static Serial pc(SERIAL_TX, SERIAL_RX);
+
+void MAX30100::setLEDs(pulseWidth pw, ledCurrent red, ledCurrent ir){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_SPO2_CONFIG, data_read, 1);
+    data_read[0] = data_read[0] & 0xFC; // Set LED_PW to 00
+    data_write[0] = data_read[0] | pw;
+    i2c_write(MAX30100_ADDRESS, MAX30100_SPO2_CONFIG, data_write, 1);     // Mask LED_PW
+    data_write[0] = ((red<<4) | ir);
+    i2c_write(MAX30100_ADDRESS, MAX30100_LED_CONFIG, data_write, 1); // write LED configs
+}
+
+void MAX30100::setSPO2(sampleRate sr, high_resolution hi_res){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_SPO2_CONFIG, data_read, 1);
+    data_read[0] = data_read[0] & 0xA3; // Set SPO2_SR to 000 and SPO2_HI_RES_EN to 0
+    data_write[0] = data_read[0] | (sr<<2) | (hi_res<<6);
+    i2c_write(MAX30100_ADDRESS, MAX30100_SPO2_CONFIG, data_write, 1); // Mask SPO2_SR
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);
+    data_write[0] = data_read[0] & 0xF8; // Set Mode to 000
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1); // Mask MODE
+}
+
+void MAX30100::setInterruptSPO2(void){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_INT_ENABLE, data_read, 1);
+    data_write[0] = data_read[0] | 0x10; // Set Interrupt enable for SPO2
+    i2c_write(MAX30100_ADDRESS, MAX30100_INT_ENABLE, data_write, 1); // Mask ENB_SPO2_RDY
+}
+
+int MAX30100::getNumSamp(void){
+    char data_read[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_FIFO_W_POINTER, data_read, 1);
+    char wrPtr = data_read[0];
+    i2c_read(MAX30100_ADDRESS, MAX30100_FIFO_R_POINTER, data_read, 1);
+    char rdPtr = data_read[0];
+    return (abs( 16 + (int)wrPtr - (int)rdPtr ) % 16);
+}
+
+void MAX30100::setTemp(void){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);
+    data_write[0] = data_read[0] | 0x0B;    // Set SPO2 Mode and enable temperature
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1); // Mask MODE
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);
+}
+
+void MAX30100::setSPO2mode(void){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);
+    data_write[0] = data_read[0] | 0x03;    // Set SPO2 Mode
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1);
+}
+
+int MAX30100::readTemp(void){
+    char data_read[1];
+    char temp_int, temp_fract;
+    int temp_measured;
+    i2c_read(MAX30100_ADDRESS, MAX30100_TEMP_INTEGER, data_read, 1);
+    temp_int = data_read[0];
+    i2c_read(MAX30100_ADDRESS, MAX30100_TEMP_FRACTION, data_read, 1);
+    temp_fract = data_read[0] & 0x0F;
+    temp_measured = ((int)temp_int)+(((int)temp_fract) >> 4);
+    return temp_measured;
+}
+
+void MAX30100::readSensor(void){
+    char data_read[4];
+    i2c_read(MAX30100_ADDRESS, MAX30100_FIFO_DATA_REG, data_read, 4);  // Read four times from the FIFO
+    HR = (data_read[0]<<8) | data_read[1];    // Combine values to get the actual number
+    SPO2 = (data_read[2]<<8) | data_read[3];  // Combine values to get the actual number
+}
+
+void MAX30100::shutdown(void){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);  // Get the current register
+    data_write[0] = data_read[0] | 0x80;
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1);   // mask the SHDN bit
+}
+
+void MAX30100::reset(void){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);  // Get the current register
+    data_write[0] = data_read[0] | 0x40;
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1);   // mask the RESET bit
+}
+
+void MAX30100::startup(void){
+    char data_read[1];
+    char data_write[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);  // Get the current register
+    data_write[0] = data_read[0] & 0x7F;
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1);   // mask the SHDN bit
+}
+
+char MAX30100::getRevID(void){
+    char data_read[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_REVISION_ID, data_read, 1);
+    return data_read[0];
+}
+
+char MAX30100::getPartID(void){
+    char data_read[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_PART_ID, data_read, 1);
+    return data_read[0];
+}
+
+void MAX30100::begin(pulseWidth pw, ledCurrent ir, sampleRate sr){
+    char data_write[1];
+    data_write[0] = 0x03;
+    i2c_write(MAX30100_ADDRESS, MAX30100_CONFIG, data_write, 1); // Heart rate only
+    data_write[0] = ir;
+    i2c_write(MAX30100_ADDRESS, MAX30100_LED_CONFIG, data_write, 1);
+    data_write[0] = ((sr<<2)|pw);
+    i2c_write(MAX30100_ADDRESS, MAX30100_SPO2_CONFIG, data_write, 1);
+}
+
+void MAX30100::init(pulseWidth pw, sampleRate sr, high_resolution hi_res, ledCurrent red, ledCurrent ir){
+    
+    setLEDs(pw, red, ir);
+    setSPO2(sr, hi_res);
+    
+}
+
+void MAX30100::printRegisters(void){
+    char data_read[1];
+    i2c_read(MAX30100_ADDRESS, MAX30100_INT_STATUS, data_read, 1);
+    pc.printf("INT_STATUS: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_INT_ENABLE, data_read, 1);
+    pc.printf("INT_ENABLE: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_FIFO_W_POINTER, data_read, 1);
+    pc.printf("FIFO_W_POINTER: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_OVR_COUNTER, data_read, 1);
+    pc.printf("OVR_COUNTER: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_FIFO_R_POINTER, data_read, 1);
+    pc.printf("FIFO_R_POINTER: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_FIFO_DATA_REG, data_read, 1);
+    pc.printf("FIFO_DATA_REG: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_CONFIG, data_read, 1);
+    pc.printf("CONFIG: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_SPO2_CONFIG, data_read, 1);
+    pc.printf("SPO2_CONFIG: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_LED_CONFIG, data_read, 1);
+    pc.printf("LED_CONFIG: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_TEMP_INTEGER, data_read, 1);
+    pc.printf("TEMP_INTEGER: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_TEMP_FRACTION, data_read, 1);
+    pc.printf("TEMP_FRACTION: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_REVISION_ID, data_read, 1);
+    pc.printf("REVISION_ID: %#4X\r\n", data_read[0]);
+    i2c_read(MAX30100_ADDRESS, MAX30100_PART_ID, data_read, 1);
+    pc.printf("PART_ID: %#4X\r\n", data_read[0]);
+}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/max30100.h	Sun Apr 03 13:43:19 2016 +0000
@@ -0,0 +1,149 @@
+/*
+ Library for the Maxim MAX30100 pulse oximetry system
+ */
+
+/* Define to prevent recursive inclusion -------------------------------------*/
+#ifndef __MAX30100_H
+#define __MAX30100_H
+
+#include "mbed.h"
+
+
+/******************************************************************************/
+/*********** PULSE OXIMETER AND HEART RATE REGISTER MAPPING  **************/
+/******************************************************************************/
+
+// status registers
+#define MAX30100_INT_STATUS          0x00
+#define MAX30100_INT_ENABLE          0x01
+
+// FIFO registers
+#define MAX30100_FIFO_W_POINTER      0x02
+#define MAX30100_OVR_COUNTER         0x03
+#define MAX30100_FIFO_R_POINTER      0x04
+#define MAX30100_FIFO_DATA_REG       0x05
+
+// configuration registers
+#define MAX30100_CONFIG              0x06
+#define MAX30100_SPO2_CONFIG         0x07
+#define MAX30100_LED_CONFIG          0x09
+
+// temperature registers
+#define MAX30100_TEMP_INTEGER        0x16
+#define MAX30100_TEMP_FRACTION       0x17
+
+// PART ID registers
+#define MAX30100_REVISION_ID         0xFE
+#define MAX30100_PART_ID             0xFF
+
+#define I_AM_MAX30100                0x11
+
+/************************************** REGISTERS VALUE *******************************************/
+
+// I2C address
+#define MAX30100_ADDRESS             0xAE
+
+//Enable interrupts
+#define MAX30100_INT_ENB_A_FULL      ((uint8_t)0x80)
+#define MAX30100_INT_ENB_TEMP_RDY    ((uint8_t)0x40)
+#define MAX30100_INT_ENB_HR_RDY      ((uint8_t)0x20)
+#define MAX30100_INT_ENB_SO2_RDY     ((uint8_t)0x10)
+
+//Mode configuration
+#define MAX30100_MODE_SHDN           ((uint8_t)0x80)
+#define MAX30100_MODE_RESET          ((uint8_t)0x40)
+#define MAX30100_MODE_TEMP_EN        ((uint8_t)0x08)
+#define MAX30100_MODE_HR             ((uint8_t)0x02)
+#define MAX30100_MODE_SPO2           ((uint8_t)0x03)
+
+//SPO2 configuration
+#define MAX30100_SPO2_HI_RES_EN           ((uint8_t)0x40)
+
+typedef enum{ // This is the same for both LEDs
+    pw200,    // 200us pulse
+    pw400,    // 400us pulse
+    pw800,    // 800us pulse
+    pw1600    // 1600us pulse
+}pulseWidth;
+
+typedef enum{
+    sr50,    // 50 samples per second
+    sr100,   // 100 samples per second
+    sr167,   // 167 samples per second
+    sr200,   // 200 samples per second
+    sr400,   // 400 samples per second
+    sr600,   // 600 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 (16 bit with 1.6ms LED pulse width)
+}high_resolution;
+
+typedef enum
+{
+    OXIMETER_OK = 0,
+    OXIMETER_ERROR = 1,
+    OXIMETER_TIMEOUT = 2,
+    OXIMETER_NOT_IMPLEMENTED = 3
+} OXIMETER_StatusTypeDef;
+
+/**
+ * @brief  MAX30100 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 *);
+} MAX30100_DrvExtTypeDef;
+
+class MAX30100 {
+public:
+        
+    /* Public Methods */
+    
+    uint16_t HR;      // Last heart rate datapoint
+    uint16_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 = pw1600, // 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 /* __MAX30100_H */
\ No newline at end of file