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Dependencies:   mbed

Fork of RD117_MBED by Maxim Integrated

MAX30102/MAX30102.cpp@0:346a7fa07998, 2016-04-20 (annotated)

Committer:
MaximGordon
Date:
Wed Apr 20 21:46:06 2016 +0000
Revision:
0:346a7fa07998
Child:
3:7c0fb55eb3ff
Complete

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MaximGordon 0:346a7fa07998 1 /** \file max30102.cpp ******************************************************
MaximGordon 0:346a7fa07998 2 *
MaximGordon 0:346a7fa07998 3 * Project: MAXREFDES117#
MaximGordon 0:346a7fa07998 4 * Filename: max30102.cpp
MaximGordon 0:346a7fa07998 5 * Description: This module is an embedded controller driver for the MAX30102
MaximGordon 0:346a7fa07998 6 *
MaximGordon 0:346a7fa07998 7 * Revision History:
MaximGordon 0:346a7fa07998 8 *\n 1-18-2016 Rev 01.00 GL Initial release.
MaximGordon 0:346a7fa07998 9 *\n
MaximGordon 0:346a7fa07998 10 *
MaximGordon 0:346a7fa07998 11 * --------------------------------------------------------------------
MaximGordon 0:346a7fa07998 12 *
MaximGordon 0:346a7fa07998 13 * This code follows the following naming conventions:
MaximGordon 0:346a7fa07998 14 *
MaximGordon 0:346a7fa07998 15 *\n char ch_pmod_value
MaximGordon 0:346a7fa07998 16 *\n char (array) s_pmod_s_string[16]
MaximGordon 0:346a7fa07998 17 *\n float f_pmod_value
MaximGordon 0:346a7fa07998 18 *\n int32_t n_pmod_value
MaximGordon 0:346a7fa07998 19 *\n int32_t (array) an_pmod_value[16]
MaximGordon 0:346a7fa07998 20 *\n int16_t w_pmod_value
MaximGordon 0:346a7fa07998 21 *\n int16_t (array) aw_pmod_value[16]
MaximGordon 0:346a7fa07998 22 *\n uint16_t uw_pmod_value
MaximGordon 0:346a7fa07998 23 *\n uint16_t (array) auw_pmod_value[16]
MaximGordon 0:346a7fa07998 24 *\n uint8_t uch_pmod_value
MaximGordon 0:346a7fa07998 25 *\n uint8_t (array) auch_pmod_buffer[16]
MaximGordon 0:346a7fa07998 26 *\n uint32_t un_pmod_value
MaximGordon 0:346a7fa07998 27 *\n int32_t * pn_pmod_value
MaximGordon 0:346a7fa07998 28 *
MaximGordon 0:346a7fa07998 29 * ------------------------------------------------------------------------- */
MaximGordon 0:346a7fa07998 30 /*******************************************************************************
MaximGordon 0:346a7fa07998 31 * Copyright (C) 2015 Maxim Integrated Products, Inc., All Rights Reserved.
MaximGordon 0:346a7fa07998 32 *
MaximGordon 0:346a7fa07998 33 * Permission is hereby granted, free of charge, to any person obtaining a
MaximGordon 0:346a7fa07998 34 * copy of this software and associated documentation files (the "Software"),
MaximGordon 0:346a7fa07998 35 * to deal in the Software without restriction, including without limitation
MaximGordon 0:346a7fa07998 36 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
MaximGordon 0:346a7fa07998 37 * and/or sell copies of the Software, and to permit persons to whom the
MaximGordon 0:346a7fa07998 38 * Software is furnished to do so, subject to the following conditions:
MaximGordon 0:346a7fa07998 39 *
MaximGordon 0:346a7fa07998 40 * The above copyright notice and this permission notice shall be included
MaximGordon 0:346a7fa07998 41 * in all copies or substantial portions of the Software.
MaximGordon 0:346a7fa07998 42 *
MaximGordon 0:346a7fa07998 43 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
MaximGordon 0:346a7fa07998 44 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MaximGordon 0:346a7fa07998 45 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
MaximGordon 0:346a7fa07998 46 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
MaximGordon 0:346a7fa07998 47 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
MaximGordon 0:346a7fa07998 48 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
MaximGordon 0:346a7fa07998 49 * OTHER DEALINGS IN THE SOFTWARE.
MaximGordon 0:346a7fa07998 50 *
MaximGordon 0:346a7fa07998 51 * Except as contained in this notice, the name of Maxim Integrated
MaximGordon 0:346a7fa07998 52 * Products, Inc. shall not be used except as stated in the Maxim Integrated
MaximGordon 0:346a7fa07998 53 * Products, Inc. Branding Policy.
MaximGordon 0:346a7fa07998 54 *
MaximGordon 0:346a7fa07998 55 * The mere transfer of this software does not imply any licenses
MaximGordon 0:346a7fa07998 56 * of trade secrets, proprietary technology, copyrights, patents,
MaximGordon 0:346a7fa07998 57 * trademarks, maskwork rights, or any other form of intellectual
MaximGordon 0:346a7fa07998 58 * property whatsoever. Maxim Integrated Products, Inc. retains all
MaximGordon 0:346a7fa07998 59 * ownership rights.
MaximGordon 0:346a7fa07998 60 *******************************************************************************
MaximGordon 0:346a7fa07998 61 */
MaximGordon 0:346a7fa07998 62 #include "mbed.h"
MaximGordon 0:346a7fa07998 63 #include "MAX30102.h"
MaximGordon 0:346a7fa07998 64
MaximGordon 0:346a7fa07998 65 #ifdef TARGET_MAX32600MBED
MaximGordon 0:346a7fa07998 66 I2C i2c(I2C1_SDA, I2C1_SCL);
MaximGordon 0:346a7fa07998 67 #else
MaximGordon 0:346a7fa07998 68 I2C i2c(I2C_SDA, I2C_SCL);
MaximGordon 0:346a7fa07998 69 #endif
MaximGordon 0:346a7fa07998 70
MaximGordon 0:346a7fa07998 71 bool maxim_max30102_write_reg(uint8_t uch_addr, uint8_t uch_data)
MaximGordon 0:346a7fa07998 72 /**
MaximGordon 0:346a7fa07998 73 * \brief Write a value to a MAX30102 register
MaximGordon 0:346a7fa07998 74 * \par Details
MaximGordon 0:346a7fa07998 75 * This function writes a value to a MAX30102 register
MaximGordon 0:346a7fa07998 76 *
MaximGordon 0:346a7fa07998 77 * \param[in] uch_addr - register address
MaximGordon 0:346a7fa07998 78 * \param[in] uch_data - register data
MaximGordon 0:346a7fa07998 79 *
MaximGordon 0:346a7fa07998 80 * \retval true on success
MaximGordon 0:346a7fa07998 81 */
MaximGordon 0:346a7fa07998 82 {
MaximGordon 0:346a7fa07998 83 char ch_i2c_data[2];
MaximGordon 0:346a7fa07998 84 ch_i2c_data[0]=uch_addr;
MaximGordon 0:346a7fa07998 85 ch_i2c_data[1]=uch_data;
MaximGordon 0:346a7fa07998 86
MaximGordon 0:346a7fa07998 87 if(i2c.write(I2C_WRITE_ADDR, ch_i2c_data, 2, false)==0)
MaximGordon 0:346a7fa07998 88 return true;
MaximGordon 0:346a7fa07998 89 else
MaximGordon 0:346a7fa07998 90 return false;
MaximGordon 0:346a7fa07998 91 }
MaximGordon 0:346a7fa07998 92
MaximGordon 0:346a7fa07998 93 bool maxim_max30102_read_reg(uint8_t uch_addr, uint8_t *uch_data)
MaximGordon 0:346a7fa07998 94 /**
MaximGordon 0:346a7fa07998 95 * \brief Read a MAX30102 register
MaximGordon 0:346a7fa07998 96 * \par Details
MaximGordon 0:346a7fa07998 97 * This function reads a MAX30102 register
MaximGordon 0:346a7fa07998 98 *
MaximGordon 0:346a7fa07998 99 * \param[in] uch_addr - register address
MaximGordon 0:346a7fa07998 100 * \param[out] uch_data - pointer that stores the register data
MaximGordon 0:346a7fa07998 101 *
MaximGordon 0:346a7fa07998 102 * \retval true on success
MaximGordon 0:346a7fa07998 103 */
MaximGordon 0:346a7fa07998 104 {
MaximGordon 0:346a7fa07998 105 char ch_i2c_data;
MaximGordon 0:346a7fa07998 106 ch_i2c_data=uch_addr;
MaximGordon 0:346a7fa07998 107 if(i2c.write(I2C_WRITE_ADDR, &ch_i2c_data, 1, true)!=0)
MaximGordon 0:346a7fa07998 108 return false;
MaximGordon 0:346a7fa07998 109 if(i2c.read(I2C_READ_ADDR, &ch_i2c_data, 1, false)==0)
MaximGordon 0:346a7fa07998 110 {
MaximGordon 0:346a7fa07998 111 *uch_data=(uint8_t) ch_i2c_data;
MaximGordon 0:346a7fa07998 112 return true;
MaximGordon 0:346a7fa07998 113 }
MaximGordon 0:346a7fa07998 114 else
MaximGordon 0:346a7fa07998 115 return false;
MaximGordon 0:346a7fa07998 116 }
MaximGordon 0:346a7fa07998 117
MaximGordon 0:346a7fa07998 118 bool maxim_max30102_init()
MaximGordon 0:346a7fa07998 119 /**
MaximGordon 0:346a7fa07998 120 * \brief Initialize the MAX30102
MaximGordon 0:346a7fa07998 121 * \par Details
MaximGordon 0:346a7fa07998 122 * This function initializes the MAX30102
MaximGordon 0:346a7fa07998 123 *
MaximGordon 0:346a7fa07998 124 * \param None
MaximGordon 0:346a7fa07998 125 *
MaximGordon 0:346a7fa07998 126 * \retval true on success
MaximGordon 0:346a7fa07998 127 */
MaximGordon 0:346a7fa07998 128 {
MaximGordon 0:346a7fa07998 129 if(!maxim_max30102_write_reg(REG_INTR_ENABLE_1,0xc0)) // INTR setting
MaximGordon 0:346a7fa07998 130 return false;
MaximGordon 0:346a7fa07998 131 if(!maxim_max30102_write_reg(REG_INTR_ENABLE_2,0x00))
MaximGordon 0:346a7fa07998 132 return false;
MaximGordon 0:346a7fa07998 133 if(!maxim_max30102_write_reg(REG_FIFO_WR_PTR,0x00)) //FIFO_WR_PTR[4:0]
MaximGordon 0:346a7fa07998 134 return false;
MaximGordon 0:346a7fa07998 135 if(!maxim_max30102_write_reg(REG_OVF_COUNTER,0x00)) //OVF_COUNTER[4:0]
MaximGordon 0:346a7fa07998 136 return false;
MaximGordon 0:346a7fa07998 137 if(!maxim_max30102_write_reg(REG_FIFO_RD_PTR,0x00)) //FIFO_RD_PTR[4:0]
MaximGordon 0:346a7fa07998 138 return false;
MaximGordon 0:346a7fa07998 139 if(!maxim_max30102_write_reg(REG_FIFO_CONFIG,0x0f)) //sample avg = 1, fifo rollover=false, fifo almost full = 17
MaximGordon 0:346a7fa07998 140 return false;
MaximGordon 0:346a7fa07998 141 if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x03)) //0x02 for Red only, 0x03 for SpO2 mode 0x07 multimode LED
MaximGordon 0:346a7fa07998 142 return false;
MaximGordon 0:346a7fa07998 143 if(!maxim_max30102_write_reg(REG_SPO2_CONFIG,0x27)) // SPO2_ADC range = 4096nA, SPO2 sample rate (100 Hz), LED pulseWidth (400uS)
MaximGordon 0:346a7fa07998 144 return false;
MaximGordon 0:346a7fa07998 145
MaximGordon 0:346a7fa07998 146 if(!maxim_max30102_write_reg(REG_LED1_PA,0x24)) //Choose value for ~ 7mA for LED1
MaximGordon 0:346a7fa07998 147 return false;
MaximGordon 0:346a7fa07998 148 if(!maxim_max30102_write_reg(REG_LED2_PA,0x24)) // Choose value for ~ 7mA for LED2
MaximGordon 0:346a7fa07998 149 return false;
MaximGordon 0:346a7fa07998 150 if(!maxim_max30102_write_reg(REG_PILOT_PA,0x7f)) // Choose value for ~ 25mA for Pilot LED
MaximGordon 0:346a7fa07998 151 return false;
MaximGordon 0:346a7fa07998 152 return true;
MaximGordon 0:346a7fa07998 153 }
MaximGordon 0:346a7fa07998 154
MaximGordon 0:346a7fa07998 155 bool maxim_max30102_read_fifo(uint32_t *un_red_led, uint32_t *un_ir_led)
MaximGordon 0:346a7fa07998 156 /**
MaximGordon 0:346a7fa07998 157 * \brief Read a set of samples from the MAX30102 FIFO register
MaximGordon 0:346a7fa07998 158 * \par Details
MaximGordon 0:346a7fa07998 159 * This function reads a set of samples from the MAX30102 FIFO register
MaximGordon 0:346a7fa07998 160 *
MaximGordon 0:346a7fa07998 161 * \param[out] *un_red_led - pointer that stores the red LED reading data
MaximGordon 0:346a7fa07998 162 * \param[out] *un_ir_led - pointer that stores the IR LED reading data
MaximGordon 0:346a7fa07998 163 *
MaximGordon 0:346a7fa07998 164 * \retval true on success
MaximGordon 0:346a7fa07998 165 */
MaximGordon 0:346a7fa07998 166 {
MaximGordon 0:346a7fa07998 167 uint32_t un_temp;
MaximGordon 0:346a7fa07998 168 unsigned char uch_temp;
MaximGordon 0:346a7fa07998 169 *un_red_led=0;
MaximGordon 0:346a7fa07998 170 *un_ir_led=0;
MaximGordon 0:346a7fa07998 171 char ch_i2c_data[6];
MaximGordon 0:346a7fa07998 172
MaximGordon 0:346a7fa07998 173 //read and clear status register
MaximGordon 0:346a7fa07998 174 maxim_max30102_read_reg(REG_INTR_STATUS_1, &uch_temp);
MaximGordon 0:346a7fa07998 175 maxim_max30102_read_reg(REG_INTR_STATUS_2, &uch_temp);
MaximGordon 0:346a7fa07998 176
MaximGordon 0:346a7fa07998 177 ch_i2c_data[0]=REG_FIFO_DATA;
MaximGordon 0:346a7fa07998 178 if(i2c.write(I2C_WRITE_ADDR, ch_i2c_data, 1, true)!=0)
MaximGordon 0:346a7fa07998 179 return false;
MaximGordon 0:346a7fa07998 180 if(i2c.read(I2C_READ_ADDR, ch_i2c_data, 6, false)!=0)
MaximGordon 0:346a7fa07998 181 {
MaximGordon 0:346a7fa07998 182 return false;
MaximGordon 0:346a7fa07998 183 }
MaximGordon 0:346a7fa07998 184 un_temp=(unsigned char) ch_i2c_data[0];
MaximGordon 0:346a7fa07998 185 un_temp<<=16;
MaximGordon 0:346a7fa07998 186 *un_red_led+=un_temp;
MaximGordon 0:346a7fa07998 187 un_temp=(unsigned char) ch_i2c_data[1];
MaximGordon 0:346a7fa07998 188 un_temp<<=8;
MaximGordon 0:346a7fa07998 189 *un_red_led+=un_temp;
MaximGordon 0:346a7fa07998 190 un_temp=(unsigned char) ch_i2c_data[2];
MaximGordon 0:346a7fa07998 191 *un_red_led+=un_temp;
MaximGordon 0:346a7fa07998 192
MaximGordon 0:346a7fa07998 193 un_temp=(unsigned char) ch_i2c_data[3];
MaximGordon 0:346a7fa07998 194 un_temp<<=16;
MaximGordon 0:346a7fa07998 195 *un_ir_led+=un_temp;
MaximGordon 0:346a7fa07998 196 un_temp=(unsigned char) ch_i2c_data[4];
MaximGordon 0:346a7fa07998 197 un_temp<<=8;
MaximGordon 0:346a7fa07998 198 *un_ir_led+=un_temp;
MaximGordon 0:346a7fa07998 199 un_temp=(unsigned char) ch_i2c_data[5];
MaximGordon 0:346a7fa07998 200 *un_ir_led+=un_temp;
MaximGordon 0:346a7fa07998 201 *un_red_led&=0x03FFFF; //Mask MSB [23:18]
MaximGordon 0:346a7fa07998 202 *un_ir_led&=0x03FFFF; //Mask MSB [23:18]
MaximGordon 0:346a7fa07998 203
MaximGordon 0:346a7fa07998 204
MaximGordon 0:346a7fa07998 205 return true;
MaximGordon 0:346a7fa07998 206 }
MaximGordon 0:346a7fa07998 207
MaximGordon 0:346a7fa07998 208 bool maxim_max30102_reset()
MaximGordon 0:346a7fa07998 209 /**
MaximGordon 0:346a7fa07998 210 * \brief Reset the MAX30102
MaximGordon 0:346a7fa07998 211 * \par Details
MaximGordon 0:346a7fa07998 212 * This function resets the MAX30102
MaximGordon 0:346a7fa07998 213 *
MaximGordon 0:346a7fa07998 214 * \param None
MaximGordon 0:346a7fa07998 215 *
MaximGordon 0:346a7fa07998 216 * \retval true on success
MaximGordon 0:346a7fa07998 217 */
MaximGordon 0:346a7fa07998 218 {
MaximGordon 0:346a7fa07998 219 if(!maxim_max30102_write_reg(REG_MODE_CONFIG,0x40))
MaximGordon 0:346a7fa07998 220 return false;
MaximGordon 0:346a7fa07998 221 else
MaximGordon 0:346a7fa07998 222 return true;
MaximGordon 0:346a7fa07998 223 }