Driver, C++ source code, and library for the MAX30101 heart rate sensor chip. The MAX30101 IC includes integrated LEDs and photodetectors for the collection of raw data for Heart Rate/Pulse Rate monitoring and for SpO2 (blood oxygen saturation) levels.
Dependents: MAX30101_Heart_Rate_Sp02_Sensor_Chip MAX30101_Heart_Rate_Sp02_SENSOR_Hello_World
Diff: MAX30101.cpp
- Revision:
- 0:b0addee6d8d1
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/MAX30101.cpp Sat Jul 21 07:30:15 2018 +0000 @@ -0,0 +1,721 @@ +/******************************************************************************* + * Copyright (C) 2016 Maxim Integrated Products, Inc., All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included + * in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES + * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Except as contained in this notice, the name of Maxim Integrated + * Products, Inc. shall not be used except as stated in the Maxim Integrated + * Products, Inc. Branding Policy. + * + * The mere transfer of this software does not imply any licenses + * of trade secrets, proprietary technology, copyrights, patents, + * trademarks, maskwork rights, or any other form of intellectual + * property whatsoever. Maxim Integrated Products, Inc. retains all + * ownership rights. + ******************************************************************************* + */ + +#include "mbed.h" +#include "MAX30101.h" + +MAX30101 *MAX30101::instance = NULL; + +//****************************************************************************** +MAX30101::MAX30101(PinName sda, PinName scl, int slaveAddress): + slaveAddress(slaveAddress) { + i2c = new I2C(sda, scl); + i2c_owner = true; + i2c->frequency(400000); + onInterruptCallback = NULL; + onDataAvailableCallback = NULL; + instance = this; +} + +//****************************************************************************** +MAX30101::MAX30101(I2C *_i2c, int slaveAddress) : + slaveAddress(slaveAddress) { + i2c = _i2c; + i2c_owner = false; + i2c->frequency(400000); + onInterruptCallback = NULL; + onDataAvailableCallback = NULL; + instance = this; +} + +//****************************************************************************** +MAX30101::~MAX30101(void) { + if (i2c_owner) { + delete i2c; + } +} + +//****************************************************************************** +int MAX30101::int_handler(void) { + uint16_t index, i; + uint16_t rx_bytes, second_rx_bytes; + char temp_int; + char temp_frac; + uint16_t num_active_led; + uint32_t sample; + int loop = 1; + static uint8_t cntr_int = 0; + + max30101_Interrupt_Status_1_t Interrupt_Status_1; + max30101_Interrupt_Status_2_t Interrupt_Status_2; + max30101_mode_configuration_t mode_configuration; + max30101_multiLED_mode_ctrl_1_t multiLED_mode_ctrl_1; + max30101_multiLED_mode_ctrl_2_t multiLED_mode_ctrl_2; + max30101_spo2_configuration_t spo2_configuration; + max30101_fifo_configuration_t fifo_configuration; + + cntr_int++; + + while (loop) { + if (i2c_reg_read(REG_INT_STAT_1, &Interrupt_Status_1.all) != 0) { ///< Read Interrupt flag bits + return -1; + } + + if (i2c_reg_read(REG_INT_STAT_2, &Interrupt_Status_2.all) != 0) { ///< Read Interrupt flag bits + return -1; + } + + /* Read all the relevant register bits */ + if (i2c_reg_read(REG_MODE_CFG, &mode_configuration.all) != 0) { + return -1; + } + + + if (i2c_reg_read(REG_SLT2_SLT1, &multiLED_mode_ctrl_1.all) != 0) { + return -1; + } + + + if (i2c_reg_read(REG_SLT4_SLT3, &multiLED_mode_ctrl_2.all) != 0) { + return -1; + } + + + if (i2c_reg_read(REG_SPO2_CFG, &spo2_configuration.all) != 0) { + return -1; + } + + + if (i2c_reg_read(REG_FIFO_CFG, &fifo_configuration.all) != 0) { + return -1; + } + + + + if (Interrupt_Status_1.bit.a_full) { + ///< Read the sample(s) + char reg = REG_FIFO_DATA; + + num_active_led = 0; + + if (mode_configuration.bit.mode == 0x02) {///< Heart Rate mode, i.e. 1 led + num_active_led = 1; + } else if (mode_configuration.bit.mode == 0x03) { ///< SpO2 mode, i.e. 2 led + num_active_led = 2; + } else if (mode_configuration.bit.mode == 0x07) { ///< Multi-LED mode, i.e. 1-4 led + if (multiLED_mode_ctrl_1.bit.slot1 != 0) { + num_active_led++; + } + + if (multiLED_mode_ctrl_1.bit.slot2 != 0) { + num_active_led++; + } + + if (multiLED_mode_ctrl_2.bit.slot3 != 0) { + num_active_led++; + } + + if (multiLED_mode_ctrl_2.bit.slot4 != 0) { + num_active_led++; + } + } + ///< 3bytes/LED x Number of Active LED x FIFO level selected + rx_bytes = 3 * num_active_led * (32-fifo_configuration.bit.fifo_a_full); + + second_rx_bytes = rx_bytes; + + /** + * @brief: + * The FIFO Size is determined by the Sample size. The number of bytes + * in a Sample is dictated by number of LED's + * + * #LED Selected Bytes in "1" sample + * 1 3 + * 2 6 + * 3 9 + * 4 12 + * + * The I2C API function limits the number of bytes to read, to 256 (i.e. + * char). Therefore, when set for Multiple LED's and the FIFO + * size is set to 32. It would mean there is more than 256 bytes. + * In that case two I2C reads have to be made. However It is important + * to note that each "Sample" must be read completely and reading only + * partial number of bytes from a sample will result in erroneous data. + * + * + * For example: + * Num of LED selected = 3 and FIFO size is set to 32 (i.e. 0 value in + * register), then the number of bytes will be + * 3bytes/Led * 3led's * 32 = 288 bytes in all. Since there are + * 3 LED's each sample will contain (3 * 3) 9bytes. + * Therefore Sample 1 = 9bytes, Sample 2 = 18,... Sample 28 = 252. + * Therefore the first I2C read should be 252 bytes and the second + * read should be 288-252 = 36. + * + * It turns out that this size issue comes up only when number of LED + * selected is 3 or 4 and choosing 252bytes + * for the first I2C read would work for both Number of LED selection. + */ + + if (rx_bytes <= CHUNK_SIZE) { + I2CM_Read(slaveAddress, ®, 1, &max30101_rawData[0], + (char)rx_bytes /*total_databytes_1*/); + } else { + I2CM_Read(slaveAddress, ®, 1, &max30101_rawData[0], CHUNK_SIZE); + + second_rx_bytes = second_rx_bytes - CHUNK_SIZE; + I2CM_Read(slaveAddress, ®, 1, &max30101_rawData[CHUNK_SIZE], + (char)second_rx_bytes); + } + + index = 0; + + for (i = 0; i < rx_bytes; i += 3) { + sample = ((uint32_t)(max30101_rawData[i] & 0x03) << 16) | (max30101_rawData[i + 1] << 8) | max30101_rawData[i + 2]; + + ///< Right shift the data based on the LED_PW setting + sample = sample >> (3 - spo2_configuration.bit.led_pw); // 0=shift 3, 1=shift 2, 2=shift 1, 3=no shift + + max30101_buffer[index++] = sample; + } + + onDataAvailableCallback(MAX30101_OXIMETER_DATA + num_active_led, max30101_buffer, index); + } + + + ///< This interrupt handles the temperature interrupt + if (Interrupt_Status_2.bit.die_temp_rdy) { + char reg; + + reg = REG_TINT; + if (I2CM_Read(slaveAddress, ®, 1, &temp_int, 1) != 0) { + return -1; + } + + reg = REG_TFRAC; + if (I2CM_Read(slaveAddress, ®, 1, &temp_frac, 1) != 0) { + return -1; + } + + max30101_final_temp = (int8_t)temp_int + 0.0625f * temp_frac; + + if (i2c_reg_write(REG_TEMP_EN, 0x00) != 0) { ///< Die Temperature Config, Temp disable... after one read... + return -1; + } + } + + if (i2c_reg_read(REG_INT_STAT_1, &Interrupt_Status_1.all) != 0) { ///< Read Interrupt flag bits + + return -1; + } + if (Interrupt_Status_1.bit.a_full != 1) { + loop = 0; + } + } + + interruptPostCallback(); + + + return 0; +} + +//****************************************************************************** +int MAX30101::SpO2mode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg, + uint8_t sample_rate, uint8_t pulse_width, + uint8_t red_led_current, uint8_t ir_led_current) { + + char status; + + max30101_mode_configuration_t mode_configuration; + max30101_fifo_configuration_t fifo_configuration; + max30101_spo2_configuration_t spo2_configuration; + max30101_Interrupt_Enable_1_t Interrupt_Enable_1; + + mode_configuration.all = 0; + mode_configuration.bit.reset = 1; + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) // Reset the device + { + return -1; + } + + ///< Give it some settle time (100ms) + wait(1.0 / 10.0); ///< Let things settle down a bit + + fifo_configuration.all = 0; + fifo_configuration.bit.smp_ave = sample_avg; ///< Sample averaging; + fifo_configuration.bit.fifo_roll_over_en = 1; ///< FIFO Roll over enabled + fifo_configuration.bit.fifo_a_full = fifo_waterlevel_mark; ///< Interrupt when certain level is filled + + if (i2c_reg_write(REG_FIFO_CFG, fifo_configuration.all) != 0) { + return -1; + } + + spo2_configuration.bit.spo2_adc_rge = 0x2; ///< ADC Range 8192 fullscale + spo2_configuration.bit.spo2_sr = sample_rate; ///< 100 Samp/sec. + spo2_configuration.bit.led_pw = pulse_width; ///< Pulse Width=411us and ADC Resolution=18 + if (i2c_reg_write(REG_SPO2_CFG, spo2_configuration.all) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED1_PA, red_led_current) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED2_PA, ir_led_current) != 0) { + return -1; + } + + /************/ + + if (i2c_reg_read(REG_INT_STAT_1, &status) != 0) ///< Clear INT1 by reading the status + { + return -1; + } + + if (i2c_reg_read(REG_INT_STAT_2, &status) != 0) ///< Clear INT2 by reading the status + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_W_PTR, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_OVF_CNT, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_R_PTR, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + Interrupt_Enable_1.all = 0; + Interrupt_Enable_1.bit.a_full_en = 1; ///< Enable FIFO almost full interrupt + if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) { + return -1; + } + + mode_configuration.all = 0; + mode_configuration.bit.mode = 0x03; ///< SpO2 mode + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::SpO2mode_stop(void) { + + max30101_Interrupt_Enable_1_t Interrupt_Enable_1; + max30101_mode_configuration_t mode_configuration; + uint8_t led1_pa; + uint8_t led2_pa; + + Interrupt_Enable_1.all = 0; + Interrupt_Enable_1.bit.a_full_en = 0; ///< Disable FIFO almost full interrupt + if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) { + return -1; + } + + mode_configuration.all = 0; + mode_configuration.bit.mode = 0x00; ///< SpO2 mode off + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) { + return -1; + } + + led1_pa = 0; ///< RED LED current, 0.0 + if (i2c_reg_write(REG_LED1_PA, led1_pa) != 0) { + return -1; + } + + led2_pa = 0; ///< IR LED current, 0.0 + if (i2c_reg_write(REG_LED2_PA, led2_pa) != 0) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::HRmode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg, + uint8_t sample_rate, uint8_t pulse_width, + uint8_t red_led_current) { + + /*uint8_t*/ char status; + + max30101_mode_configuration_t mode_configuration; + max30101_fifo_configuration_t fifo_configuration; + max30101_spo2_configuration_t spo2_configuration; + max30101_Interrupt_Enable_1_t Interrupt_Enable_1; + + mode_configuration.all = 0; + mode_configuration.bit.reset = 1; + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) ///< Reset the device, Mode = don't use... + { + return -1; + } + + ///< Give it some settle time (100ms) + wait(1.0 / 10.0); ///< Let things settle down a bit + + fifo_configuration.all = 0; + fifo_configuration.bit.smp_ave = sample_avg; ///< Sample averaging; + fifo_configuration.bit.fifo_roll_over_en = 1; ///< FIFO Roll over enabled + fifo_configuration.bit.fifo_a_full = fifo_waterlevel_mark; ///< Interrupt when certain level is filled + if (i2c_reg_write(REG_FIFO_CFG, fifo_configuration.all) != 0) { + return -1; + } + + spo2_configuration.bit.spo2_adc_rge = 0x2; ///< ADC Range 8192 fullscale + spo2_configuration.bit.spo2_sr = sample_rate; ///< 100 Samp/sec. + spo2_configuration.bit.led_pw = pulse_width; ///< Pulse Width=411us and ADC Resolution=18 + if (i2c_reg_write(REG_SPO2_CFG, spo2_configuration.all) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED1_PA, red_led_current) != 0) { + return -1; + } + + /************/ + + if (i2c_reg_read(REG_INT_STAT_1, &status) != 0) ///< Clear INT1 by reading the status + { + return -1; + } + + if (i2c_reg_read(REG_INT_STAT_2, &status) != 0) ///< Clear INT2 by reading the status + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_W_PTR, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_OVF_CNT, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_R_PTR, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + Interrupt_Enable_1.all = 0; + Interrupt_Enable_1.bit.a_full_en = 1; + + // Interrupt + if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) { + return -1; + } + + mode_configuration.all = 0; + mode_configuration.bit.mode = 0x02; ///< HR mode + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::HRmode_stop(void) { + + max30101_Interrupt_Enable_1_t Interrupt_Enable_1; + max30101_mode_configuration_t mode_configuration; + + Interrupt_Enable_1.all = 0; + Interrupt_Enable_1.bit.a_full_en = 0; ///< Disable FIFO almost full interrupt + if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) { + return -1; + } + + mode_configuration.all = 0; + mode_configuration.bit.mode = 0x00; ///< HR mode off + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED1_PA, 0) != 0) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::Multimode_init(uint8_t fifo_waterlevel_mark, uint8_t sample_avg, + uint8_t sample_rate, uint8_t pulse_width, + uint8_t red_led_current, uint8_t ir_led_current, + uint8_t green_led_current, uint8_t slot_1, + uint8_t slot_2, uint8_t slot_3, uint8_t slot_4) { + + char status; + max30101_mode_configuration_t mode_configuration; + max30101_fifo_configuration_t fifo_configuration; + max30101_spo2_configuration_t spo2_configuration; + max30101_multiLED_mode_ctrl_1_t multiLED_mode_ctrl_1; + max30101_multiLED_mode_ctrl_2_t multiLED_mode_ctrl_2; + max30101_Interrupt_Enable_1_t Interrupt_Enable_1; + + mode_configuration.all = 0; + mode_configuration.bit.reset = 1; + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) ///< Reset the device, Mode = don't use... + { + return -1; + } + + /* Give it some settle time (100ms) */ ///< Let things settle down a bit + wait(1.0 / 10.0); + + fifo_configuration.all = 0; + fifo_configuration.bit.smp_ave = sample_avg; ///< Sample averaging; + fifo_configuration.bit.fifo_roll_over_en = 1; ///< FIFO Roll over enabled + fifo_configuration.bit.fifo_a_full = + fifo_waterlevel_mark; ///< Interrupt when certain level is filled + if (i2c_reg_write(REG_FIFO_CFG, fifo_configuration.all) != 0) { + return -1; + } + + spo2_configuration.bit.spo2_adc_rge = 0x2; ///< ADC Range 8192 fullscale + spo2_configuration.bit.spo2_sr = sample_rate; ///< 100 Samp/sec. + spo2_configuration.bit.led_pw = pulse_width; ///< Pulse Width=411us and ADC Resolution=18 + if (i2c_reg_write(REG_SPO2_CFG, spo2_configuration.all) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED1_PA, red_led_current) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED2_PA, ir_led_current) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED3_PA, green_led_current) != 0) { + return -1; + } + + ///< 0x01=Red(LED1), 0x02=IR(LED2), 0x03=Green(LED3) : Use LEDn_PA to adjust the intensity + ///< 0x05=Red , 0x06=IR , 0x07=Green : Use PILOT_PA to adjust the intensity DO NOT USE THIS ROW... + + multiLED_mode_ctrl_1.bit.slot1 = slot_1; + multiLED_mode_ctrl_1.bit.slot2 = slot_2; + if (i2c_reg_write(REG_SLT2_SLT1, multiLED_mode_ctrl_1.all)) { + return -1; + } + + multiLED_mode_ctrl_2.all = 0; + multiLED_mode_ctrl_2.bit.slot3 = slot_3; + multiLED_mode_ctrl_2.bit.slot4 = slot_4; + if (i2c_reg_write(REG_SLT4_SLT3, multiLED_mode_ctrl_2.all)) { + return -1; + } + + /************/ + + if (i2c_reg_read(REG_INT_STAT_1, &status) != 0) ///< Clear INT1 by reading the status + { + return -1; + } + + if (i2c_reg_read(REG_INT_STAT_2, &status) != 0) ///< Clear INT2 by reading the status + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_W_PTR, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_OVF_CNT, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + if (i2c_reg_write(REG_FIFO_R_PTR, 0x00) != 0) ///< Clear FIFO ptr + { + return -1; + } + + Interrupt_Enable_1.all = 0; + Interrupt_Enable_1.bit.a_full_en = 1; ///< Enable FIFO almost full interrupt + if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) { + return -1; + } + + mode_configuration.all = 0; + mode_configuration.bit.mode = 0x07; ///< Multi-LED mode + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::Multimode_stop(void) { + +max30101_Interrupt_Enable_1_t Interrupt_Enable_1; +max30101_mode_configuration_t mode_configuration; + + + Interrupt_Enable_1.all = 0; + Interrupt_Enable_1.bit.a_full_en = 0; ///< Disable FIFO almost full interrupt + if (i2c_reg_write(REG_INT_EN_1, Interrupt_Enable_1.all) != 0) { + return -1; + } + + mode_configuration.all = 0; + mode_configuration.bit.mode = 0x00; ///< Multi-LED mode off + if (i2c_reg_write(REG_MODE_CFG, mode_configuration.all) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED1_PA, 0) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED2_PA, 0) != 0) { + return -1; + } + + if (i2c_reg_write(REG_LED3_PA, 0) != 0) { + return -1; + } + return 0; +} + +//****************************************************************************** +int MAX30101::tempread(void) { + + if (i2c_reg_write(REG_INT_EN_2, 0x02) != 0) {///< Interrupt Enable 2, Temperature Interrupt + return -1; + } + + if (i2c_reg_write(REG_TEMP_EN, 0x01) != 0) {///< Die Temperature Config, Temp enable... + + return -1; + } + return 0; +} + +//****************************************************************************** +int MAX30101::i2c_reg_write(MAX30101_REG_map_t reg, char value) { + + char cmdData[2] = {reg, value}; + + if (I2CM_Write(slaveAddress, NULL, 0, cmdData, 2) != 0) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::i2c_reg_read(MAX30101_REG_map_t reg, char *value) { + if (I2CM_Read(slaveAddress, (char *)®, 1, value, 1) != 0 /*1*/) { + return -1; + } + + return 0; +} + +//****************************************************************************** +int MAX30101::I2CM_Read(int slaveAddress, char *writeData, char writeCount, + char *readData, char readCount) { + + if (writeData != NULL && writeCount != 0) { + i2c->write(slaveAddress, writeData, writeCount, true); + } + if (readData != NULL && readCount != 0) { + i2c->read(slaveAddress, readData, readCount); + } + return 0; +} + +//****************************************************************************** +int MAX30101::I2CM_Write(int slaveAddress, char *writeData1, char writeCount1, + char *writeData2, char writeCount2) { + + if (writeData1 != NULL && writeCount1 != 0) { + i2c->write(slaveAddress, writeData1, writeCount1); + } + if (writeData2 != NULL && writeCount2 != 0) { + i2c->write(slaveAddress, writeData2, writeCount2); + } + return 0; +} + +//****************************************************************************** +void MAX30101::onDataAvailable(DataCallbackFunction _onDataAvailable) { + + onDataAvailableCallback = _onDataAvailable; +} + +//****************************************************************************** +void MAX30101::dataAvailable(uint32_t id, uint32_t *buffer, uint32_t length) { + + if (onDataAvailableCallback != NULL) { + (*onDataAvailableCallback)(id, buffer, length); + } +} + +//****************************************************************************** +void MAX30101::onInterrupt(InterruptFunction _onInterrupt) { + + onInterruptCallback = _onInterrupt; +} + +//****************************************************************************** +void MAX30101::interruptPostCallback(void) { + + if (onInterruptCallback != NULL) { + + (*onInterruptCallback)(); + } +} + +//****************************************************************************** +void MAX30101::MidIntHandler(void) { + + MAX30101::instance->int_handler(); +}