MAX30102.cpp

00001 /** \file max30102.cpp ******************************************************
00002 *
00003 * Project: MAXREFDES117#
00004 * Filename: max30102.cpp
00005 * Description: This module is an embedded controller driver for the MAX30102
00006 *
00007 *
00008 * --------------------------------------------------------------------
00009 *
00010 * This code follows the following naming conventions:
00011 *
00012 * char              ch_pmod_value
00013 * char (array)      s_pmod_s_string[16]
00014 * float             f_pmod_value
00015 * int32_t           n_pmod_value
00016 * int32_t (array)   an_pmod_value[16]
00017 * int16_t           w_pmod_value
00018 * int16_t (array)   aw_pmod_value[16]
00019 * uint16_t          uw_pmod_value
00020 * uint16_t (array)  auw_pmod_value[16]
00021 * uint8_t           uch_pmod_value
00022 * uint8_t (array)   auch_pmod_buffer[16]
00023 * uint32_t          un_pmod_value
00024 * int32_t *         pn_pmod_value
00025 *
00026 * ------------------------------------------------------------------------- */
00027 /*******************************************************************************
00028 * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved.
00029 *
00030 * Permission is hereby granted, free of charge, to any person obtaining a
00031 * copy of this software and associated documentation files (the "Software"),
00032 * to deal in the Software without restriction, including without limitation
00033 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
00034 * and/or sell copies of the Software, and to permit persons to whom the
00035 * Software is furnished to do so, subject to the following conditions:
00036 *
00037 * The above copyright notice and this permission notice shall be included
00038 * in all copies or substantial portions of the Software.
00039 *
00040 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00041 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00042 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00043 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
00044 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
00045 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
00046 * OTHER DEALINGS IN THE SOFTWARE.
00047 *
00048 * Except as contained in this notice, the name of Maxim Integrated
00049 * Products, Inc. shall not be used except as stated in the Maxim Integrated
00050 * Products, Inc. Branding Policy.
00051 *
00052 * The mere transfer of this software does not imply any licenses
00053 * of trade secrets, proprietary technology, copyrights, patents,
00054 * trademarks, maskwork rights, or any other form of intellectual
00055 * property whatsoever. Maxim Integrated Products, Inc. retains all
00056 * ownership rights.
00057 *******************************************************************************
00058 */
00059 #include "mbed.h"
00060 #include "MAX30102.h"
00061 #define PIN_I2C1_SCL       PTC10
00062 #define PIN_I2C1_SDA       PTC11
00063 
00064 
00065 #ifdef TARGET_MAX32600MBED
00066 I2C i2c(I2C1_SDA, I2C1_SCL);
00067 #else
00068 I2C i2c(PIN_I2C1_SDA, PIN_I2C1_SCL);
00069 
00070 #endif
00071 
00072 bool maxim_max30102_write_reg(uint8_t uch_addr, uint8_t uch_data)
00073 /**
00074 * \brief        Write a value to a MAX30102 register
00075 * \par          Details
00076 *               This function writes a value to a MAX30102 register
00077 *
00078 * \param[in]    uch_addr    - register address
00079 * \param[in]    uch_data    - register data
00080 *
00081 * \retval       true on success
00082 */
00083 {
00084   char ach_i2c_data[2];
00085   ach_i2c_data[0]=uch_addr;
00086   ach_i2c_data[1]=uch_data;
00087   
00088   if(i2c.write(I2C_WRITE_ADDR, ach_i2c_data, 2, false)==0)
00089     return true;
00090   else
00091     return false;
00092 }
00093 
00094 bool maxim_max30102_read_reg(uint8_t uch_addr, uint8_t *puch_data)
00095 /**
00096 * \brief        Read a MAX30102 register
00097 * \par          Details
00098 *               This function reads a MAX30102 register
00099 *
00100 * \param[in]    uch_addr    - register address
00101 * \param[out]   puch_data    - pointer that stores the register data
00102 *
00103 * \retval       true on success
00104 */
00105 {
00106   char ch_i2c_data;
00107   ch_i2c_data=uch_addr;
00108   if(i2c.write(I2C_WRITE_ADDR, &ch_i2c_data, 1, true)!=0)
00109     return false;
00110   if(i2c.read(I2C_READ_ADDR, &ch_i2c_data, 1, false)==0)
00111   {
00112     *puch_data=(uint8_t) ch_i2c_data;
00113     return true;
00114   }
00115   else
00116     return false;
00117 }
00118 
00119 bool maxim_max30102_init()
00120 /**
00121 * \brief        Initialize the MAX30102
00122 * \par          Details
00123 *               This function initializes the MAX30102
00124 *
00125 * \param        None
00126 *
00127 * \retval       true on success
00128 */
00129 {
00130   if(!maxim_max30102_write_reg(REG_INTR_ENABLE_1,0xc0)) // INTR setting
00131     return false;
00132   if(!maxim_max30102_write_reg(REG_INTR_ENABLE_2,0x00))
00133     return false;
00134   if(!maxim_max30102_write_reg(REG_FIFO_WR_PTR,0x00))  //FIFO_WR_PTR[4:0]
00135     return false;
00136   if(!maxim_max30102_write_reg(REG_OVF_COUNTER,0x00))  //OVF_COUNTER[4:0]
00137     return false;
00138   if(!maxim_max30102_write_reg(REG_FIFO_RD_PTR,0x00))  //FIFO_RD_PTR[4:0]
00139     return false;
00140   if(!maxim_max30102_write_reg(REG_FIFO_CONFIG,0x2f))  //sample avg = 1, fifo rollover=false, fifo almost full = 17 *MADE CHANGES to OF*
00141     return false;
00142   if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x02))   //0x02 for Red only, 0x03 for SpO2 mode 0x07 multimode LED
00143     return false;
00144   if(!maxim_max30102_write_reg(REG_SPO2_CONFIG,0x35))  // SPO2_ADC range = 4096nA, SPO2 sample rate (100 Hz), LED pulseWidth (400uS) 3f for 400Hz,33 for 800, 37 for 1Khz
00145     return false;
00146   
00147   if(!maxim_max30102_write_reg(REG_LED1_PA,0x24))   //Choose value for ~ 7mA for LED1
00148     return false;
00149   if(!maxim_max30102_write_reg(REG_LED2_PA,0x24))   // Choose value for ~ 7mA for LED2
00150     return false;
00151   if(!maxim_max30102_write_reg(REG_PILOT_PA,0x7f))   // Choose value for ~ 25mA for Pilot LED
00152     return false;
00153   return true;  
00154 }
00155 
00156 bool maxim_max30102_read_fifo(uint32_t *pun_red_led)
00157 /**
00158 * \brief        Read a set of samples from the MAX30102 FIFO register
00159 * \par          Details
00160 *               This function reads a set of samples from the MAX30102 FIFO register
00161 *
00162 * \param[out]   *pun_red_led   - pointer that stores the red LED reading data
00163 * \param[out]   *pun_ir_led    - pointer that stores the IR LED reading data
00164 *
00165 * \retval       true on success
00166 */
00167 {
00168   uint32_t un_temp;
00169   unsigned char uch_temp;
00170   *pun_red_led=0;
00171   //*pun_ir_led=0;
00172   char ach_i2c_data[3];
00173   
00174   //read and clear status register
00175   maxim_max30102_read_reg(REG_INTR_STATUS_1, &uch_temp);
00176   maxim_max30102_read_reg(REG_INTR_STATUS_2, &uch_temp);
00177   
00178   ach_i2c_data[0]=REG_FIFO_DATA;
00179   if(i2c.write(I2C_WRITE_ADDR, ach_i2c_data, 1, true)!=0)
00180     return false;
00181   if(i2c.read(I2C_READ_ADDR, ach_i2c_data, 3, false)!=0)
00182   {
00183     return false;
00184   }
00185   un_temp=(unsigned char) ach_i2c_data[0];
00186   un_temp<<=16;
00187   *pun_red_led+=un_temp;
00188   un_temp=(unsigned char) ach_i2c_data[1];
00189   un_temp<<=8;
00190   *pun_red_led+=un_temp;
00191   un_temp=(unsigned char) ach_i2c_data[2];
00192   *pun_red_led+=un_temp;
00193   
00194   //un_temp=(unsigned char) ach_i2c_data[3];
00195   //un_temp<<=16;
00196   //*pun_ir_led+=un_temp;
00197   //un_temp=(unsigned char) ach_i2c_data[4];
00198   //un_temp<<=8;
00199   //*pun_ir_led+=un_temp;
00200   //un_temp=(unsigned char) ach_i2c_data[5];
00201   //*pun_ir_led+=un_temp;
00202   *pun_red_led&=0x03FFFF;  //Mask MSB [23:18]
00203   //*pun_ir_led&=0x03FFFF;  //Mask MSB [23:18]
00204   
00205   
00206   return true;
00207 }
00208 
00209 bool maxim_max30102_reset()
00210 /**
00211 * \brief        Reset the MAX30102
00212 * \par          Details
00213 *               This function resets the MAX30102
00214 *
00215 * \param        None
00216 *
00217 * \retval       true on success
00218 */
00219 {
00220     i2c.frequency(400000);
00221     if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x40))
00222         return false;
00223     else
00224         return true;    
00225 }