| /* |
| * Author: Jon Trulson <jtrulson@ics.com> |
| * Copyright (c) 2014 Intel Corporation. |
| * |
| * 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 THE AUTHORS OR COPYRIGHT HOLDERS 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. |
| */ |
| #pragma once |
| |
| #include <string> |
| #include <stdint.h> |
| #include <sys/time.h> |
| #include <mraa/gpio.h> |
| |
| namespace upm { |
| /** |
| * @brief Grove Ear-clip Heart Rate Sensor library |
| * @defgroup groveehr libupm-groveehr |
| * @ingroup seeed gpio medical |
| */ |
| |
| /** |
| * @library groveehr |
| * @sensor groveehr |
| * @comname Grove Ear-clip Heart Rate Sensor |
| * @type medical |
| * @man seeed |
| * @con gpio |
| * |
| * @brief API for the Grove Ear-clip Heart Rate Sensor |
| * |
| * UPM module for the Grove ear-clip heart rate sensor. It is used to measure your |
| * heart rate. |
| * |
| * @image html groveehr.jpg |
| * @snippet groveehr.cxx Interesting |
| */ |
| class GroveEHR { |
| public: |
| /** |
| * GroveEHR constructor |
| * |
| * @param pin Digital pin to use |
| */ |
| GroveEHR(int pin); |
| /** |
| * GroveEHR destructor |
| */ |
| ~GroveEHR(); |
| /** |
| * Returns the time of milliseconds elapsed since initClock() |
| * was last called. |
| * |
| * @return Elapsed milliseconds |
| */ |
| uint32_t getMillis(); |
| |
| /** |
| * Resets the clock |
| * |
| */ |
| void initClock(); |
| |
| /** |
| * Resets the beat counter to 0. The beat counter should be |
| * stopped via stopBeatCounter() prior to calling this function. |
| * |
| */ |
| void clearBeatCounter(); |
| |
| /** |
| * Starts the beat counter |
| * |
| */ |
| void startBeatCounter(); |
| |
| /** |
| * Stops the beat counter |
| * |
| */ |
| void stopBeatCounter(); |
| |
| /** |
| * Gets the beat Counter |
| * |
| * @return Beat counter |
| */ |
| uint32_t beatCounter(); |
| |
| /** |
| * Computes the heart rate |
| * |
| * @return Computed heart rate |
| */ |
| int heartRate(); |
| |
| private: |
| /** |
| * Beat interrupt service routine (ISR) |
| * |
| */ |
| static void beatISR(void *ctx); |
| |
| volatile uint32_t m_beatCounter; |
| struct timeval m_startTime; |
| mraa_gpio_context m_gpio; |
| }; |
| } |
| |
| |