Maxim Integrated / MAX30101

Library for MAX30101 SpO2 and heart rate sensor

Dependents:   HeartRate HeartRate proj final_project_ee119 ... more

MAX30101.h@3:a2effad05c99, 2017-05-04 (annotated)

Committer:
j3
Date:
Thu May 04 23:44:48 2017 +0000
Revision:
3:a2effad05c99
Parent:
2:0db1f3bec727
Child:
4:d1b50bd4065a
Added reading fifo mbr fx.  Library requires algorithm to get heart rate or SpO2 readings.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
j3 0:2d0c91de9279 1 /*******************************************************************************
j3 0:2d0c91de9279 2 * Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
j3 0:2d0c91de9279 3 *
j3 0:2d0c91de9279 4 * Permission is hereby granted, free of charge, to any person obtaining a
j3 0:2d0c91de9279 5 * copy of this software and associated documentation files (the "Software"),
j3 0:2d0c91de9279 6 * to deal in the Software without restriction, including without limitation
j3 0:2d0c91de9279 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
j3 0:2d0c91de9279 8 * and/or sell copies of the Software, and to permit persons to whom the
j3 0:2d0c91de9279 9 * Software is furnished to do so, subject to the following conditions:
j3 0:2d0c91de9279 10 *
j3 0:2d0c91de9279 11 * The above copyright notice and this permission notice shall be included
j3 0:2d0c91de9279 12 * in all copies or substantial portions of the Software.
j3 0:2d0c91de9279 13 *
j3 0:2d0c91de9279 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
j3 0:2d0c91de9279 15 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
j3 0:2d0c91de9279 16 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
j3 0:2d0c91de9279 17 * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
j3 0:2d0c91de9279 18 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
j3 0:2d0c91de9279 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
j3 0:2d0c91de9279 20 * OTHER DEALINGS IN THE SOFTWARE.
j3 0:2d0c91de9279 21 *
j3 0:2d0c91de9279 22 * Except as contained in this notice, the name of Maxim Integrated
j3 0:2d0c91de9279 23 * Products, Inc. shall not be used except as stated in the Maxim Integrated
j3 0:2d0c91de9279 24 * Products, Inc. Branding Policy.
j3 0:2d0c91de9279 25 *
j3 0:2d0c91de9279 26 * The mere transfer of this software does not imply any licenses
j3 0:2d0c91de9279 27 * of trade secrets, proprietary technology, copyrights, patents,
j3 0:2d0c91de9279 28 * trademarks, maskwork rights, or any other form of intellectual
j3 0:2d0c91de9279 29 * property whatsoever. Maxim Integrated Products, Inc. retains all
j3 0:2d0c91de9279 30 * ownership rights.
j3 0:2d0c91de9279 31 *******************************************************************************
j3 0:2d0c91de9279 32 */
j3 0:2d0c91de9279 33 #ifndef __MAX30101_H_
j3 0:2d0c91de9279 34 #define __MAX30101_H_
j3 0:2d0c91de9279 35
j3 0:2d0c91de9279 36 #include "mbed.h"
j3 0:2d0c91de9279 37
j3 0:2d0c91de9279 38 /**
j3 0:2d0c91de9279 39 * Driver for the MAX30101
j3 0:2d0c91de9279 40 *
j3 0:2d0c91de9279 41 * @code
j3 0:2d0c91de9279 42 * #include "mbed.h"
j3 0:2d0c91de9279 43 * #include "max32630fthr.h"
j3 0:2d0c91de9279 44 * #include "MAX30101.h"
j3 0:2d0c91de9279 45 *
j3 0:2d0c91de9279 46 * MAX32630FTHR pegasus(MAX32630FTHR::VIO_3V3);
j3 0:2d0c91de9279 47 *
j3 0:2d0c91de9279 48 * //Get I2C instance
j3 0:2d0c91de9279 49 * I2C i2cBus(P3_4, P3_5);
j3 0:2d0c91de9279 50 *
j3 0:2d0c91de9279 51 * //Get temp sensor instance
j3 0:2d0c91de9279 52 * MAX30101 op_sensor(i2cBus); //Constructor takes 7-bit slave adrs
j3 0:2d0c91de9279 53 *
j3 0:2d0c91de9279 54 * int main(void)
j3 0:2d0c91de9279 55 * {
j3 0:2d0c91de9279 56 * //use sensor
j3 0:2d0c91de9279 57 * }
j3 0:2d0c91de9279 58 * @endcode
j3 0:2d0c91de9279 59 */
j3 0:2d0c91de9279 60
j3 0:2d0c91de9279 61 class MAX30101
j3 0:2d0c91de9279 62 {
j3 0:2d0c91de9279 63 public:
j3 0:2d0c91de9279 64
j3 0:2d0c91de9279 65 ///7-bit slave address
j3 0:2d0c91de9279 66 static const uint8_t I2C_ADRS = 0x57;
j3 0:2d0c91de9279 67 ///8-bit write address
j3 0:2d0c91de9279 68 static const uint8_t I2C_W_ADRS = 0xAE;
j3 0:2d0c91de9279 69 ///8-bit read address
j3 0:2d0c91de9279 70 static const uint8_t I2C_R_ADRS = 0xAF;
j3 3:a2effad05c99 71 ///Max # Bytes in FIFO
j3 3:a2effad05c99 72 static const uint16_t MAX_FIFO_BYTES = 288;
j3 3:a2effad05c99 73 ///# of bytes per LED channel
j3 3:a2effad05c99 74 static const uint8_t BYTES_PER_CH = 3;
j3 0:2d0c91de9279 75
j3 0:2d0c91de9279 76 ///MAX30101 Register Map
j3 0:2d0c91de9279 77 enum Registers_e
j3 0:2d0c91de9279 78 {
j3 0:2d0c91de9279 79 InterruptStatus1 = 0x00,
j3 0:2d0c91de9279 80 InterruptStatus2 = 0x01,
j3 0:2d0c91de9279 81 InterruptEnable1 = 0x02,
j3 0:2d0c91de9279 82 InterruptEnable2 = 0x03,
j3 0:2d0c91de9279 83 FIFO_WritePointer = 0x04,
j3 0:2d0c91de9279 84 OverflowCounter = 0x05,
j3 0:2d0c91de9279 85 FIFO_ReadPointer = 0x06,
j3 0:2d0c91de9279 86 FIFO_DataRegister = 0x07,
j3 0:2d0c91de9279 87 FIFO_Configuration = 0x08,
j3 0:2d0c91de9279 88 ModeConfiguration = 0x09,
j3 0:2d0c91de9279 89 SpO2Configuration = 0x0A,
j3 0:2d0c91de9279 90 LED1_PA = 0x0C,
j3 0:2d0c91de9279 91 LED2_PA = 0x0D,
j3 0:2d0c91de9279 92 LED3_PA = 0x0E,
j3 0:2d0c91de9279 93 ProxModeLED_PA = 0x10,
j3 0:2d0c91de9279 94 ModeControlReg1 = 0x11,
j3 0:2d0c91de9279 95 ModeControlReg2 = 0x12,
j3 0:2d0c91de9279 96 DieTempInt = 0x1F,
j3 0:2d0c91de9279 97 DieTempFrac = 0x20,
j3 0:2d0c91de9279 98 DieTempConfig = 0x21,
j3 0:2d0c91de9279 99 ProxIntThreshold = 0x30,
j3 0:2d0c91de9279 100 RevID = 0xFE,
j3 0:2d0c91de9279 101 PartID = 0xFF
j3 0:2d0c91de9279 102 };
j3 0:2d0c91de9279 103
j3 3:a2effad05c99 104 ///MAX30101 Operational Modes
j3 3:a2effad05c99 105 enum OpModes_e
j3 3:a2effad05c99 106 {
j3 3:a2effad05c99 107 HeartRateMode = 2,
j3 3:a2effad05c99 108 SpO2Mode = 3,
j3 3:a2effad05c99 109 MultiLedMode = 7
j3 3:a2effad05c99 110 };
j3 3:a2effad05c99 111
j3 0:2d0c91de9279 112 ///Interrupt Status/Enable BitField
j3 0:2d0c91de9279 113 union InterruptBitField_u
j3 0:2d0c91de9279 114 {
j3 0:2d0c91de9279 115 uint8_t all;
j3 0:2d0c91de9279 116
j3 0:2d0c91de9279 117 struct BitField_s
j3 0:2d0c91de9279 118 {
j3 0:2d0c91de9279 119 uint8_t pwr_rdy : 1; ///< Bit0
j3 0:2d0c91de9279 120 uint8_t die_temp : 1; ///< Bit1
j3 0:2d0c91de9279 121 uint8_t reserved : 2; ///< Bit3:2
j3 0:2d0c91de9279 122 uint8_t prox_int : 1; ///< Bit4
j3 0:2d0c91de9279 123 uint8_t alc_ovf : 1; ///< Bit5
j3 0:2d0c91de9279 124 uint8_t ppg_rdy : 1; ///< Bit6
j3 0:2d0c91de9279 125 uint8_t a_full : 1; ///< Bit7
j3 0:2d0c91de9279 126 }bits;
j3 0:2d0c91de9279 127 };
j3 0:2d0c91de9279 128
j3 0:2d0c91de9279 129 ///FIFO Configuration BitField
j3 0:2d0c91de9279 130 union FIFO_Configuration_u
j3 0:2d0c91de9279 131 {
j3 0:2d0c91de9279 132 uint8_t all;
j3 0:2d0c91de9279 133 struct BitField_s
j3 0:2d0c91de9279 134 {
j3 0:2d0c91de9279 135 uint8_t fifo_a_full : 4;
j3 0:2d0c91de9279 136 uint8_t fifo_roll_over_en : 1;
j3 0:2d0c91de9279 137 uint8_t sample_average : 3;
j3 0:2d0c91de9279 138 }bits;
j3 0:2d0c91de9279 139 };
j3 0:2d0c91de9279 140
j3 0:2d0c91de9279 141 ///Mode Configuration BitField
j3 0:2d0c91de9279 142 union ModeConfiguration_u
j3 0:2d0c91de9279 143 {
j3 0:2d0c91de9279 144 uint8_t all;
j3 0:2d0c91de9279 145 struct BitField_s
j3 0:2d0c91de9279 146 {
j3 0:2d0c91de9279 147 uint8_t mode : 3;
j3 0:2d0c91de9279 148 uint8_t reserved : 3;
j3 0:2d0c91de9279 149 uint8_t reset : 1;
j3 0:2d0c91de9279 150 uint8_t shdn : 1;
j3 0:2d0c91de9279 151 }bits;
j3 0:2d0c91de9279 152 };
j3 0:2d0c91de9279 153
j3 0:2d0c91de9279 154 ///SpO2 Configuration BitField
j3 0:2d0c91de9279 155 union SpO2Configuration_u
j3 0:2d0c91de9279 156 {
j3 0:2d0c91de9279 157 uint8_t all;
j3 0:2d0c91de9279 158 struct BitField_s
j3 0:2d0c91de9279 159 {
j3 0:2d0c91de9279 160 uint8_t led_pw : 2;
j3 0:2d0c91de9279 161 uint8_t spo2_sr : 3;
j3 0:2d0c91de9279 162 uint8_t spo2_adc_range : 2;
j3 0:2d0c91de9279 163 uint8_t reserved : 1;
j3 0:2d0c91de9279 164 }bits;
j3 0:2d0c91de9279 165 };
j3 0:2d0c91de9279 166
j3 0:2d0c91de9279 167 ///Multi-LED Mode Control Register BitField
j3 0:2d0c91de9279 168 union ModeControlReg_u
j3 0:2d0c91de9279 169 {
j3 0:2d0c91de9279 170 uint8_t all;
j3 0:2d0c91de9279 171 struct BitField_s
j3 0:2d0c91de9279 172 {
j3 0:2d0c91de9279 173 uint8_t lo_slot : 3;
j3 0:2d0c91de9279 174 uint8_t reserved1 : 1;
j3 0:2d0c91de9279 175 uint8_t hi_slot : 3;
j3 0:2d0c91de9279 176 uint8_t reserved2 : 1;
j3 0:2d0c91de9279 177 }bits;
j3 0:2d0c91de9279 178 };
j3 0:2d0c91de9279 179
j3 0:2d0c91de9279 180 /**
j3 0:2d0c91de9279 181 * @brief Constructor using I2C PinNames
j3 0:2d0c91de9279 182 * @param sda - Pinname for sda
j3 0:2d0c91de9279 183 * @param scl - Pinname for scl
j3 0:2d0c91de9279 184 */
j3 0:2d0c91de9279 185 MAX30101(PinName sda, PinName scl);
j3 0:2d0c91de9279 186
j3 0:2d0c91de9279 187 /**
j3 0:2d0c91de9279 188 * @brief Constructor using reference to I2C object
j3 0:2d0c91de9279 189 * @param i2c - Reference to I2C object
j3 0:2d0c91de9279 190 */
j3 0:2d0c91de9279 191 MAX30101(I2C &i2c);
j3 0:2d0c91de9279 192
j3 0:2d0c91de9279 193 /** @brief Destructor */
j3 0:2d0c91de9279 194 ~MAX30101();
j3 0:2d0c91de9279 195
j3 0:2d0c91de9279 196 /**
j3 0:2d0c91de9279 197 * @brief Writes appropriate bits to Interrupt Enable 1 and 2.
j3 0:2d0c91de9279 198 *
j3 0:2d0c91de9279 199 * @param data - Interrupts to enable
j3 0:2d0c91de9279 200 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 201 */
j3 0:2d0c91de9279 202 int32_t enableInterrupts(const InterruptBitField_u data);
j3 0:2d0c91de9279 203
j3 0:2d0c91de9279 204 /**
j3 0:2d0c91de9279 205 * @brief Reads interrupt status flags from Interrupt Status 1 and 2.
j3 0:2d0c91de9279 206 *
j3 0:2d0c91de9279 207 * @param[out] data - Contains interrupts status flags on success.
j3 0:2d0c91de9279 208 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 209 */
j3 0:2d0c91de9279 210 int32_t getInterruptStatus(InterruptBitField_u &data);
j3 0:2d0c91de9279 211
j3 0:2d0c91de9279 212 /**
j3 0:2d0c91de9279 213 * @brief Writes FIFO configuration register with given data
j3 0:2d0c91de9279 214 *
j3 0:2d0c91de9279 215 * @param config - FIFO Configuration
j3 0:2d0c91de9279 216 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 217 */
j3 0:2d0c91de9279 218 int32_t setFIFOConfiguration(const FIFO_Configuration_u config);
j3 0:2d0c91de9279 219
j3 0:2d0c91de9279 220 /**
j3 0:2d0c91de9279 221 * @brief Reads FIFO configuration register
j3 0:2d0c91de9279 222 *
j3 0:2d0c91de9279 223 * @param[out] config - FIFO Configuration on success
j3 0:2d0c91de9279 224 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 225 */
j3 0:2d0c91de9279 226 int32_t getFIFOConfiguration(FIFO_Configuration_u &config);
j3 0:2d0c91de9279 227
j3 0:2d0c91de9279 228 /**
j3 0:2d0c91de9279 229 * @brief Writes Mode configuration register with given data
j3 0:2d0c91de9279 230 *
j3 0:2d0c91de9279 231 * @param config - Mode Configuration
j3 0:2d0c91de9279 232 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 233 */
j3 0:2d0c91de9279 234 int32_t setModeConfiguration(const ModeConfiguration_u config);
j3 0:2d0c91de9279 235
j3 0:2d0c91de9279 236 /**
j3 0:2d0c91de9279 237 * @brief Reads Mode configuration register
j3 0:2d0c91de9279 238 *
j3 0:2d0c91de9279 239 * @param[out] config - Mode Configuration on success
j3 0:2d0c91de9279 240 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 241 */
j3 0:2d0c91de9279 242 int32_t getModeConfiguration(ModeConfiguration_u &config);
j3 0:2d0c91de9279 243
j3 0:2d0c91de9279 244 /**
j3 0:2d0c91de9279 245 * @brief Writes SpO2 configuration register with given data
j3 0:2d0c91de9279 246 *
j3 0:2d0c91de9279 247 * @param config - SpO2 Configuration
j3 0:2d0c91de9279 248 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 249 */
j3 0:2d0c91de9279 250 int32_t setSpO2Configuration(const SpO2Configuration_u config);
j3 0:2d0c91de9279 251
j3 0:2d0c91de9279 252 /**
j3 0:2d0c91de9279 253 * @brief Reads SpO2 configuration register
j3 0:2d0c91de9279 254 *
j3 0:2d0c91de9279 255 * @param[out] config - SpO2 Configuration on success
j3 0:2d0c91de9279 256 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 257 */
j3 0:2d0c91de9279 258 int32_t getSpO2Configuration(SpO2Configuration_u &config);
j3 0:2d0c91de9279 259
j3 0:2d0c91de9279 260 /**
j3 0:2d0c91de9279 261 * @brief Writes LEDx/Prox Pulse Amplitude register with given data
j3 0:2d0c91de9279 262 *
j3 0:2d0c91de9279 263 * @param reg - LEDx/Prox Pulse Amplitude register to write
j3 0:2d0c91de9279 264 * @param amp - LED pulse amplitude
j3 0:2d0c91de9279 265 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 266 */
j3 0:2d0c91de9279 267 int32_t setLEDPulseAmplitude(Registers_e reg, const uint8_t amp);
j3 0:2d0c91de9279 268
j3 0:2d0c91de9279 269 /**
j3 0:2d0c91de9279 270 * @brief Reads LEDx/Prox Pulse Amplitude register
j3 0:2d0c91de9279 271 *
j3 0:2d0c91de9279 272 * @param reg - LEDx/Prox Pulse Amplitude register to read
j3 0:2d0c91de9279 273 * @param[out] amp - LED pulse amplitude on success
j3 0:2d0c91de9279 274 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 275 */
j3 0:2d0c91de9279 276 int32_t getLEDPulseAmplitude(Registers_e reg, uint8_t &amp);
j3 0:2d0c91de9279 277
j3 0:2d0c91de9279 278 /**
j3 0:2d0c91de9279 279 * @brief Writes Multi-LED Mode Control Register
j3 0:2d0c91de9279 280 *
j3 0:2d0c91de9279 281 * @param reg - Multi-LED Mode Control register 1 or 2
j3 0:2d0c91de9279 282 * @param data - Data to write to register
j3 0:2d0c91de9279 283 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 284 */
j3 0:2d0c91de9279 285 int32_t setMultiLEDModeControl(Registers_e reg, const ModeControlReg_u data);
j3 0:2d0c91de9279 286
j3 0:2d0c91de9279 287 /**
j3 0:2d0c91de9279 288 * @brief Reads Multi-LED Mode Control Register
j3 0:2d0c91de9279 289 *
j3 0:2d0c91de9279 290 * @param reg - Multi-LED Mode Control register 1 or 2
j3 0:2d0c91de9279 291 * @param[out] data - Data read from register on success
j3 0:2d0c91de9279 292 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 293 */
j3 0:2d0c91de9279 294 int32_t getMultiLEDModeControl(Registers_e reg, ModeControlReg_u &data);
j3 0:2d0c91de9279 295
j3 0:2d0c91de9279 296 /**
j3 2:0db1f3bec727 297 * @brief Gets raw die temperature, interrupt must be enabled
j3 0:2d0c91de9279 298 *
j3 0:2d0c91de9279 299 * @param[out] data - Raw die temperature on success
j3 0:2d0c91de9279 300 *
j3 0:2d0c91de9279 301 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 302 */
j3 0:2d0c91de9279 303 int32_t getDieTemperature(uint16_t &data);
j3 0:2d0c91de9279 304
j3 0:2d0c91de9279 305 /**
j3 2:0db1f3bec727 306 * @brief Gets die temperature in celsius, interrupt must be enabled
j3 0:2d0c91de9279 307 *
j3 0:2d0c91de9279 308 * @param[out] data - Die temperature in celsius on success
j3 0:2d0c91de9279 309 *
j3 0:2d0c91de9279 310 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 311 */
j3 0:2d0c91de9279 312 int32_t getDieTemperatureC(float &data);
j3 0:2d0c91de9279 313
j3 0:2d0c91de9279 314 /**
j3 0:2d0c91de9279 315 * @brief Converts celsius to Fahrenheit
j3 0:2d0c91de9279 316 *
j3 0:2d0c91de9279 317 * @param c - Temperature in celsius
j3 0:2d0c91de9279 318 *
j3 0:2d0c91de9279 319 * @return Temperature in Fahrenheit
j3 0:2d0c91de9279 320 */
j3 0:2d0c91de9279 321 float celsius2fahrenheit(float c);
j3 0:2d0c91de9279 322
j3 0:2d0c91de9279 323 /**
j3 0:2d0c91de9279 324 * @brief Writes Proximity Interrupt Threshold Register
j3 0:2d0c91de9279 325 *
j3 0:2d0c91de9279 326 * @param data - Data to write to register
j3 0:2d0c91de9279 327 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 328 */
j3 0:2d0c91de9279 329 int32_t setProxIntThreshold(const uint8_t data);
j3 0:2d0c91de9279 330
j3 0:2d0c91de9279 331 /**
j3 0:2d0c91de9279 332 * @brief Reads Proximity Interrupt Threshold Register
j3 0:2d0c91de9279 333 *
j3 0:2d0c91de9279 334 * @param data - Data read on success
j3 0:2d0c91de9279 335 * @return 0 on success, non 0 otherwise
j3 0:2d0c91de9279 336 */
j3 0:2d0c91de9279 337 int32_t getProxIntThreshold(uint8_t &data);
j3 3:a2effad05c99 338
j3 3:a2effad05c99 339 /**
j3 3:a2effad05c99 340 * @brief Attempts to read numBytes of data from FIFO
j3 3:a2effad05c99 341 *
j3 3:a2effad05c99 342 * @param numLeds - Number of LED channels used; 0 < numLeds < 4
j3 3:a2effad05c99 343 * @param data - pointer to buffer for holding read data
j3 3:a2effad05c99 344 * @param[out] readBytes - number of bytes read from fifo
j3 3:a2effad05c99 345 *
j3 3:a2effad05c99 346 * @return 0 on success, non 0 otherwise
j3 3:a2effad05c99 347 */
j3 3:a2effad05c99 348 int32_t readFIFO(uint8_t numLeds, uint8_t *data, uint16_t &readBytes);
j3 0:2d0c91de9279 349
j3 0:2d0c91de9279 350 protected:
j3 0:2d0c91de9279 351
j3 0:2d0c91de9279 352 /**
j3 0:2d0c91de9279 353 * @brief Write register of device
j3 0:2d0c91de9279 354 * @param reg - Register address
j3 0:2d0c91de9279 355 * @param value - Value to write
j3 0:2d0c91de9279 356 * @return 0 on success, non-zero on failure
j3 0:2d0c91de9279 357 */
j3 0:2d0c91de9279 358 int32_t writeRegister(Registers_e reg, uint8_t value);
j3 0:2d0c91de9279 359
j3 0:2d0c91de9279 360 /**
j3 0:2d0c91de9279 361 * @brief Read register of device
j3 0:2d0c91de9279 362 * @param reg - Register address
j3 0:2d0c91de9279 363 * @param[out] value - Read data on success
j3 0:2d0c91de9279 364 * @return 0 on success, non-zero on failure
j3 0:2d0c91de9279 365 */
j3 0:2d0c91de9279 366 int32_t readRegister(Registers_e reg, uint8_t &value);
j3 0:2d0c91de9279 367
j3 0:2d0c91de9279 368 private:
j3 0:2d0c91de9279 369
j3 0:2d0c91de9279 370 I2C m_i2cBus;
j3 3:a2effad05c99 371 uint8_t m_fifoReadPtr, m_fifoWritePtr, m_fifoNumBytes;
j3 3:a2effad05c99 372
j3 0:2d0c91de9279 373
j3 0:2d0c91de9279 374 };
j3 0:2d0c91de9279 375
j3 0:2d0c91de9279 376 #endif /* __MAX30101_H_ */
j3 0:2d0c91de9279 377