Host software for the MAXREFDES220 Heart Rate Monitor Smart Sensor. Hosted on the MAX32630FTHR.

Dependencies:   max32630fthr USBDevice

Fork of MAXREFDES220_HEART_RATE_MONITOR by Maxim Integrated

Finger Heart Rate Monitor and SpO2 Monitor

The MAXREFDES220 Smart Sensor FeatherWing board is a integrated solution for providing finger-based heart rate measurements and SpO2 (blood oxygen saturation). This evaluation board interfaces to the host computer using the I2C interface. Heart rate outpu is available in beats per minute (BPM) and SpO2 is reported in percentages.; the PPG (photoplethysmography) raw data is also available. The board has an MAX30101 chip which is a low power heart rate monitor with adjustable sample rates and adjustable LED currents. The low cost MAX32664 microcontroller is pre-flashed with C code for finger-based pulse rate and SpO2 monitoring. Bootloader software is included to allow for future algorithms or updates to the algorithm from Maxim Integrated.

Ordering information will be available soon.

Note: SpO2 values are not calibrated. Calibration should be performed using the final end product.

Warning

The MAXREFDES220 source code listed is dated and only compatible with the 1.2.8a.msbl. The latest sample host source code is available on the MAX32664 website.

MAXREFDES220 FeatherWing Pinout Connections

/media/uploads/phonemacro/maxrefdes220_pinouts_heart_rate_monitor.jpg

Utilities/LEDStatus.h

Committer:
phonemacro
Date:
2021-02-05
Revision:
14:3fdc09d9017b
Parent:
8:0f55f59ca341

File content as of revision 14:3fdc09d9017b:

/*******************************************************************************
* Author: Shaun Kelsey, shaun.kelsey@maximintegrated.com
* Copyright (C) 2018 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.
*******************************************************************************
*/
#ifdef ENABLE_LED_STATUS
#ifndef _LEDSTATUS_H_
#define _LEDSTATUS_H_
#include "mbed.h"

class LEDStatus
{
public:

	/** Create an LED_Status controller
	 * 
	 *  @param red PinName of red LED
	 *  @param rstate Initial state of red LED
	 *  @param green PinName of green LED
	 *  @param gstate Initial state of green LED
	 *  @param blue PinName of blue LED
	 *  @param bstate Initial state of blue LED
	 */
	LEDStatus(PinName red, int rstate, PinName green, int gstate, PinName blue, int bstate);

	/** Set the active state of each LED
	 *
	 *  @param rstate active state of red LED
	 *  @param gstate active state of green LED
	 *  @param bstate active state of blue LED
	 */
	void set_state(int rstate, int gstate, int bstate);

	/** Set and keep the LEDs in their active state */
	void solid();

	/** Set the LEDs to toggle between their active state and their off state
	 *
	 *  @param ontime The amount of time (in milliseconds) to remain in the active state
	 *  @param offtime The amount of time (in milliseconds) to remain off
	 *  @param nb The number of times to blink before remaining in the off state
	 *  				Set to -1 to blink indefinitely
	 *
	 */
	void blink(int ontime, int offtime, int nb = -1);

	/** Set the LEDs to toggle between their active state and their off state
	 *
	 *  @param period The period of each blink (in milliseconds)
	 *  @param offtime The percentage of the period during which the LEDs will be in their active state
	 *  @param nb The number of times to blink before remaining in the off state
	 *  				Set to -1 to blink indefinitely
	 */
	void blink(int period, float duty, int nb = -1);

	/** Get whether LEDState is in the blinking state
	 */
	bool is_blinking();

	/** Called in main loop of program to advance the state of the class
	 *  @detail Instead of using a Ticker and generating additional interrupts and overhead,
	 *  		LEDStatus relies on update being called at a decent interval in order
	 *  		to advance its interval time keeping and blink LEDs and the correct rate.
	 *  		If only using solid() mode, update() does not need to be called.
	 */
	void update();

private:

	DigitalOut rLED;
	DigitalOut gLED;
	DigitalOut bLED;

	int r_act;
	int g_act;
	int b_act;

	bool blinking;
	bool bs;
	int count;
	int total;

	uint64_t ont_us;
	uint64_t offt_us;

	Timer timer;

};

#endif
#endif //ENABLE_LED_STATUS