mirror of
https://github.com/oliverschmidt/contiki.git
synced 2024-08-16 07:28:57 +00:00
144 lines
4.1 KiB
C
144 lines
4.1 KiB
C
/*
|
|
* Contiki SeedEye Platform project
|
|
*
|
|
* Copyright (c) 2012,
|
|
* Scuola Superiore Sant'Anna (http://www.sssup.it) and
|
|
* Consorzio Nazionale Interuniversitario per le Telecomunicazioni
|
|
* (http://www.cnit.it).
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* \addtogroup SeedEye Contiki SEEDEYE Platform
|
|
*
|
|
* @{
|
|
*/
|
|
|
|
/**
|
|
* \file battery-sensor.c
|
|
* \brief Battery Sensor
|
|
* \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
|
|
* \date 2012-07-04
|
|
*/
|
|
|
|
#include <dev/battery-sensor.h>
|
|
|
|
#include <p32xxxx.h>
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS(battery_process, "battery sensor");
|
|
/*---------------------------------------------------------------------------*/
|
|
|
|
const struct sensors_sensor battery_sensor;
|
|
|
|
#define BATTERY_SAMPLES 10
|
|
|
|
static uint16_t battery_samples[BATTERY_SAMPLES];
|
|
static uint8_t counter = 0;
|
|
|
|
static uint8_t sensor_status = 0;
|
|
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
value(int type)
|
|
{
|
|
uint32_t tmp = 0;
|
|
uint8_t i;
|
|
for(i = 0; i < BATTERY_SAMPLES; ++i) {
|
|
tmp += battery_samples[i];
|
|
}
|
|
|
|
return tmp / BATTERY_SAMPLES;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
configure(int type, int c)
|
|
{
|
|
// all PORTB = Digital; RB10 = analog
|
|
AD1PCFG = 0b1111110111111111;
|
|
|
|
// SSRC bit = 111 implies internal counter ends sampling and starts converting
|
|
AD1CON1 = 0b0000000011100000;
|
|
|
|
AD1CHS = 0b00000000000010100000000000000000;
|
|
|
|
AD1CSSL = 0;
|
|
|
|
// Manual Sample, Tad = internal 6 TPB
|
|
AD1CON3 = 0x1F02;
|
|
|
|
AD1CON2 = 0;
|
|
|
|
// Turn ADC on
|
|
AD1CON1SET = 0b1000000000000000;
|
|
|
|
process_start(&battery_process, NULL);
|
|
|
|
sensor_status = 1;
|
|
|
|
return 0;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
static int
|
|
status(int type)
|
|
{
|
|
return sensor_status;
|
|
}
|
|
/*---------------------------------------------------------------------------*/
|
|
SENSORS_SENSOR(battery_sensor, BATTERY_SENSOR, value, configure, status);
|
|
/*---------------------------------------------------------------------------*/
|
|
PROCESS_THREAD(battery_process, ev, data)
|
|
{
|
|
PROCESS_BEGIN();
|
|
|
|
while(1) {
|
|
static struct etimer et;
|
|
|
|
etimer_set(&et, CLOCK_SECOND);
|
|
|
|
PROCESS_WAIT_EVENT_UNTIL(etimer_expired(&et));
|
|
|
|
// start converting
|
|
AD1CON1SET = 0b0000000000000010;
|
|
|
|
while(!(AD1CON1 & 0b0000000000000001)) {
|
|
; // wait conversion finish
|
|
}
|
|
|
|
// read the conversion result
|
|
battery_samples[counter] = ADC1BUF0;
|
|
|
|
counter = (counter + 1) % BATTERY_SAMPLES;
|
|
}
|
|
|
|
PROCESS_END();
|
|
}
|
|
|
|
/** @} */
|