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bd47b9ed45
* c/c++ source
* java/js/python/c/c++ examples
* Doc image (png)
* Tested on Intel Edison
* TODO: Tuning for SpO2 reading
Signed-off-by: Noel Eck <noel.eck@intel.com>
171 lines
5.7 KiB
C
171 lines
5.7 KiB
C
/*
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* Author: Noel Eck <noel.eck@intel.com>
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* Copyright (c) 2015 Intel Corporation.
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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* LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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* OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define MAX30100_I2C_ADDRESS 0x57
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/* Single IR/R sample */
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typedef struct {
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/* Raw IR (pulse) read value */
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uint16_t IR;
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/* Raw R (O2) read value */
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uint16_t R;
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} max30100_value;
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/* Function pointer for returning 1 IR/R sample */
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typedef void (*func_sample_ready_handler)(max30100_value sample, void* arg);
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/* Sample state */
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typedef enum {
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/* NOT sampling */
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MAX30100_SAMPLE_STATE_IDLE,
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/* Take one sample/currently taking one sample */
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MAX30100_SAMPLE_STATE_ONE_SHOT,
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/* Sample continuously/currently sampling continuously */
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MAX30100_SAMPLE_STATE_CONTINUOUS,
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/* Sample continuously using buffer/currently sampling continuously using buffer*/
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MAX30100_SAMPLE_STATE_CONTINUOUS_BUFFERED
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} MAX30100_SAMPLE_STATE;
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/* Pulse oximeter and heart-rate sensor I2C registers */
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typedef enum {
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/* Interrupt status (RO) */
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MAX30100_REG_INTERRUPT_STATUS = 0x00,
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/* Interrupt enable */
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MAX30100_REG_INTERRUPT_ENABLE = 0x01,
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/* FIFO write pointer */
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MAX30100_REG_FIFO_WR_PTR = 0x02,
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/* FIFO overflow counter */
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MAX30100_REG_FIFO_OVF_COUNTER = 0x03,
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/* FIFO read pointer */
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MAX30100_REG_FIFO_RD_PTR = 0x04,
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/* FIFO data */
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MAX30100_REG_FIFO_DATA = 0x05,
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/* Mode configuration */
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MAX30100_REG_MODE_CONFIG = 0x06,
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/* SPO2 configuration */
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MAX30100_REG_SPO2_CONFIG = 0x07,
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/* LED configuration */
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MAX30100_REG_LED_CONFIG = 0x09,
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/* Temperature integer (2's compliment) */
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MAX30100_REG_TEMP_INTEGER = 0x16,
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/* Temperature fraction) */
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MAX30100_REG_TEMP_FRACTION = 0x17,
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/* Revision ID (RO)*/
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MAX30100_REG_REV_ID = 0xFE,
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/* Part ID */
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MAX30100_REG_PART_ID = 0xFF
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} MAX30100_REG;
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/* MAX30100_REG_INTERRUPT_STATUS register fields */
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/* FIFO almost full, set to 1 when WR_PTR == RD_PTR - 1 */
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#define MAX30100_A_FULL (1 << 7)
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/* Temperature date ready flag */
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#define MAX30100_TEMP_RDY (1 << 6)
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/* Heartrate data ready flag */
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#define MAX30100_HR_RDY (1 << 5)
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/* HR and O2 data ready flag */
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#define MAX30100_SPO2_RDY (1 << 4)
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/* Power ready after brownout flag */
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#define MAX30100_PWR_RDY (1 << 0)
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/* MAX30100_REG_INTERRUPT_ENABLE register fields */
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/* Enable interrupt on FIFO almost full */
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#define MAX30100_EN_A_FULL (1 << 7)
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/* Enable interrupt on temperature date ready */
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#define MAX30100_EN_TEMP_RDY (1 << 6)
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/* Enable interrupt on HR data ready */
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#define MAX30100_EN_HR_RDY (1 << 5)
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/* Enable interrupt on HR and O2 data ready */
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#define MAX30100_EN_SPO2_RDY (1 << 4)
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/* MAX30100_REG_MODE_CONFIG register fields */
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/* Enable power-save mode */
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#define MAX30100_SHDN (1 << 7)
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/* Reset device */
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#define MAX30100_RESET (1 << 6)
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/* Initiate temperature reading */
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#define MAX30100_TEMP_EN (1 << 3)
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/* Device sample mode (HR, vs SpO2) */
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typedef enum _MAX30100_MODE {
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/* Turn off sampling */
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MAX30100_MODE_DISABLED = 0x00,
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/* Enable heartrate ONLY sampling */
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MAX30100_MODE_HR_EN = 0x02,
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/* Enable SpO2 sampling */
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MAX30100_MODE_SPO2_EN = 0x03
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} MAX30100_MODE;
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/* MAX30100_REG_SPO2_CONFIG register fields */
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#define MAX30100_SPO2_HI_RES_EN (1 << 6)
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typedef enum _MAX30100_SR {
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MAX30100_SR_50_HZ = 0x00,
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MAX30100_SR_100_HZ = 0x01,
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MAX30100_SR_167_HZ = 0x02,
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MAX30100_SR_200_HZ = 0x03,
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MAX30100_SR_400_HZ = 0x04,
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MAX30100_SR_600_HZ = 0x05,
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MAX30100_SR_900_HZ = 0x06,
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MAX30100_SR_1000_HZ = 0x07
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} MAX30100_SR;
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/* LED pulse width (microseconds) */
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typedef enum _MAX30100_LED_PW {
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MAX30100_LED_PW_200_US_13_BITS = 0x00,
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MAX30100_LED_PW_400_US_14_BITS = 0x01,
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MAX30100_LED_PW_800_US_15_BITS = 0x02,
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MAX30100_LED_PW_1600_US_16_BITS = 0x03
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} MAX30100_LED_PW;
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/* MAX30100_REG_LED_CONFIG register fields */
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/* LED (IR and R) current (milliamps) */
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typedef enum _MAX30100_LED_CURRENT {
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MAX30100_LED_CURRENT_0_0_MA = 0x00,
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MAX30100_LED_CURRENT_4_4_MA = 0x01,
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MAX30100_LED_CURRENT_7_6_MA = 0x02,
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MAX30100_LED_CURRENT_11_0_MA = 0x03,
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MAX30100_LED_CURRENT_14_2_MA = 0x04,
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MAX30100_LED_CURRENT_17_4_MA = 0x05,
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MAX30100_LED_CURRENT_20_8_MA = 0x06,
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MAX30100_LED_CURRENT_24_0_MA = 0x07,
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MAX30100_LED_CURRENT_27_1_MA = 0x08,
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MAX30100_LED_CURRENT_30_6_MA = 0x09,
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MAX30100_LED_CURRENT_33_8_MA = 0x0a,
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MAX30100_LED_CURRENT_37_0_MA = 0x0b,
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MAX30100_LED_CURRENT_40_2_MA = 0x0c,
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MAX30100_LED_CURRENT_43_6_MA = 0x0d,
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MAX30100_LED_CURRENT_46_8_MA = 0x0e,
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MAX30100_LED_CURRENT_50_0_MA = 0x0f
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} MAX30100_LED_CURRENT;
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#ifdef __cplusplus
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}
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#endif
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