mirror of
https://github.com/espruino/Espruino.git
synced 2025-12-08 19:06:15 +00:00
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
/*
|
|
* This file is part of Espruino, a JavaScript interpreter for Microcontrollers
|
|
*
|
|
* Copyright (C) 2019 Gordon Williams <gw@pur3.co.uk>
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
* ----------------------------------------------------------------------------
|
|
* VC31 heart rate sensor
|
|
* ----------------------------------------------------------------------------
|
|
*/
|
|
|
|
#include "hrm.h"
|
|
#include "jsutils.h"
|
|
#include "jshardware.h"
|
|
#include "jsinteractive.h"
|
|
#include "jstimer.h"
|
|
|
|
|
|
HrmCallback hrmCallback;
|
|
uint16_t hrmPollInterval = HRM_POLL_INTERVAL_DEFAULT; // in msec, so 20 = 50hz
|
|
|
|
void hrm_timer() {
|
|
int v = (int)(100 * sin(jshGetMillisecondsFromTime(jshGetSystemTime())/1000));
|
|
if (v<0) v=0;
|
|
hrmCallback(v);
|
|
}
|
|
|
|
static void hrm_sensor_timer_start() {
|
|
JsSysTime t = jshGetTimeFromMilliseconds(hrmPollInterval);
|
|
jstExecuteFn(hrm_timer, NULL, t, t, NULL);
|
|
}
|
|
|
|
static void hrm_sensor_timer_stop() {
|
|
jstStopExecuteFn(hrm_timer, 0);
|
|
}
|
|
|
|
void hrm_sensor_on(HrmCallback callback) {
|
|
hrmCallback = callback;
|
|
hrm_sensor_timer_start();
|
|
}
|
|
|
|
void hrm_sensor_off() {
|
|
hrm_sensor_timer_stop();
|
|
hrmCallback = NULL;
|
|
}
|
|
|
|
JsVar *hrm_sensor_getJsVar() {
|
|
JsVar *o = jsvNewObject();
|
|
if (o) {
|
|
// add custom info here
|
|
}
|
|
return o;
|
|
}
|
|
|
|
/// Called when JS engine torn down (disable timer/watch/etc)
|
|
void hrm_sensor_kill() {
|
|
if (hrmCallback!=NULL) // if is running
|
|
hrm_sensor_timer_stop();
|
|
}
|
|
|
|
/// Called when JS engine initialised
|
|
void hrm_sensor_init() {
|
|
if (hrmCallback!=NULL) // if is running
|
|
hrm_sensor_timer_start();
|
|
}
|