File content as of revision 0:4ad9373787e8:

/**
 * MAX30101
 * High-Sensitivity Pulse Oximeter and
 * Heart-Rate Sensor for Wearable Health
 */
#include "mbed.h"
#include "MAX30101.h"

/* Status */
#define REG_INT_MSB        0x00 /* Interrupt Status 1 */
#define REG_INT_LSB        0x01 /* Interrupt Status 2 */
#define REG_INT_ENB_MSB    0x02 /* Interrupt Enable 1 */
#define REG_INT_ENB_LSB    0x03 /* Interrupt Enable 2 */
/* FIFO */
#define REG_FIFO_WR_PTR    0x04 /* FIFO Write Pointer */
#define REG_OVF_COUNTER    0x05 /* Overflow Counter */
#define REG_FIFO_RD_PTR    0x06 /* FIFO Read Pointer */
#define REG_FIFO_DATA      0x07 /* FIFO Data Register */
/* Configuration */
#define REG_FIFO_CONFIG    0x08 /* FIFO Configuration */
#define REG_MODE_CONFIG    0x09 /* Mode Configuration */
#define REG_SPO2_CONFIG    0x0A /* SpO2 Configuration */
/* reserved                0x0B */
#define REG_LED1_PA        0x0C /* LED Pulse Amplitude 1 */
#define REG_LED2_PA        0x0D /* LED Pulse Amplitude 2 */
#define REG_LED3_PA        0x0E /* LED Pulse Amplitude 3 */
/* reserved                0x0F */
#define REG_PILOT_PA       0x10 /* Proximity LED Pulse Amplitude */
#define REG_SLOT_MSB       0x11 /* Multi-LED Mode Control Registers 2, 1 */
#define REG_SLOT_LSB       0x12 /* Multi-LED Mode Control Registers 4, 3 */
/* DIE Temperature */
#define REG_TEMP_INT       0x1F /* Die Temperature Integer */
#define REG_TEMP_FRAC      0x20 /* Die Temperature Fraction */
#define REG_TEMP_EN        0x21 /* Die Temperature Config */
/* Proximity Function */
#define REG_PROX_INT_THS   0x30 /* Proximity Interrupt Threshold */
/* Part ID */
#define REG_REV_ID         0xFE /* Revision ID */
#define REG_PART_ID        0xFF /* Part ID: 0x15 */

MAX30101::MAX30101(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr<<1) {
    // activate the peripheral
}

MAX30101::~MAX30101() { }

void MAX30101::readRegs(int addr, uint8_t * data, int len) {
    char t[1] = {addr} ;
    m_i2c.write(m_addr, t, 1, true) ;
    m_i2c.read(m_addr, (char*)data, len) ;
}

void MAX30101::writeRegs(uint8_t * data, int len) {
   m_i2c.write(m_addr, (char *)data, len) ;
}

uint8_t MAX30101::getID(void)
{
    uint8_t id ;
    readRegs(REG_PART_ID, &id, 1) ;
    return( id ) ;
}

uint8_t MAX30101::getRev(void)
{
    uint8_t rev ;
    readRegs(REG_REV_ID, &rev, 1) ;
    return( rev ) ;
}