contiki/platform/avr-rss2/dev/pulse-sensor.c

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/*
* Copyright (c) 2015, Copyright Robert Olsson / Radio Sensors AB
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* This file is part of the Contiki operating system.
*
*
* Author : Robert Olsson robert@radio-sensors.com
* Created : 2015-11-22
*/
#include "contiki.h"
#include "lib/sensors.h"
#include "dev/pulse-sensor.h"
#include "rss2.h"
const struct sensors_sensor pulse_sensor;
#define NP 2
uint32_t volatile pc[NP];
/*
* Note interrupt sources can be woken up from sleep mode PWR_SAVE
* Two interrupt ports, #0 green terminal block. #1 pin header via
* a comparator.
*/
static void
port_irq_ctrl(uint8_t on)
{
if(on) {
DDRD &= ~(1 << PD2);
PORTD &= ~(1 << PD2);
EIMSK = 0;
EICRA |= 0x20; /* Falling edge INT2 */
EIMSK |= (1 << PD2); /* Enable interrupt for pin */
/* p1 port */
DDRD &= ~(1 << PD3);
PORTD &= ~(1 << PD3);
EIMSK |= (1 << PD3); /* Enable interrupt for pin */
EICRA |= 0x80; /* Falling edge */
PCICR |= (1 << PCIE0); /* And enable irq PCINT 7:0 */
} else {
EICRA = 0;
PORTD |= (1 << PD2);
EIMSK &= ~(1 << PD2); /* Disable interrupt for pin */
PORTD |= (1 << PD3);
EIMSK &= ~(1 << PD3); /* Disable interrupt for pin */
}
}
ISR(INT2_vect)
{
if(!(PCICR & (1 << PCIE0))) {
return;
}
pc[0]++;
}
ISR(INT3_vect)
{
if(!(PCICR & (1 << PCIE0))) {
return;
}
pc[1]++;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
if(type == 0) {
return (int)pc[0];
}
if(type == 1) {
return (int)pc[1];
}
return -1;
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
return 0;
}
/*---------------------------------------------------------------------------*/
static int
configure(int type, int c)
{
port_irq_ctrl(1); /* Enable pulse counts */
return 0;
}
/*---------------------------------------------------------------------------*/
SENSORS_SENSOR(pulse_sensor, "Pulse", value, configure, status);