179 lines
6.3 KiB
C
179 lines
6.3 KiB
C
/*
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* Copyright (c) 2012, Texas Instruments Incorporated - http://www.ti.com/
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* Copyright (c) 2015, Zolertia - http://www.zolertia.com
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* Copyright (c) 2015, University of Bristol - http://www.bristol.ac.uk
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holder nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*---------------------------------------------------------------------------*/
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/**
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* \addtogroup remote-button-sensor
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* @{
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*
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* \file
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* Driver for the Re-Mote user button
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "dev/nvic.h"
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#include "dev/ioc.h"
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#include "dev/gpio.h"
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#include "dev/button-sensor.h"
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#include "sys/timer.h"
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#include "sys/ctimer.h"
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#include "sys/process.h"
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#include <stdint.h>
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#include <string.h>
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/*---------------------------------------------------------------------------*/
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#define BUTTON_USER_PORT_BASE GPIO_PORT_TO_BASE(BUTTON_USER_PORT)
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#define BUTTON_USER_PIN_MASK GPIO_PIN_MASK(BUTTON_USER_PIN)
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/*---------------------------------------------------------------------------*/
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#define DEBOUNCE_DURATION (CLOCK_SECOND >> 4)
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static struct timer debouncetimer;
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/*---------------------------------------------------------------------------*/
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static clock_time_t press_duration = 0;
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static struct ctimer press_counter;
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static uint8_t press_event_counter;
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process_event_t button_press_duration_exceeded;
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/*---------------------------------------------------------------------------*/
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static void
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duration_exceeded_callback(void *data)
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{
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press_event_counter++;
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process_post(PROCESS_BROADCAST, button_press_duration_exceeded,
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&press_event_counter);
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ctimer_set(&press_counter, press_duration, duration_exceeded_callback,
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NULL);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Retrieves the value of the button pin
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* \param type Returns the pin level or the counter of press duration events.
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* type == BUTTON_SENSOR_VALUE_TYPE_LEVEL or
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* type == BUTTON_SENSOR_VALUE_TYPE_PRESS_DURATION
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* respectively
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*/
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static int
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value(int type)
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{
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switch(type) {
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case BUTTON_SENSOR_VALUE_TYPE_LEVEL:
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return GPIO_READ_PIN(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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case BUTTON_SENSOR_VALUE_TYPE_PRESS_DURATION:
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return press_event_counter;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Callback registered with the GPIO module. Gets fired with a button
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* port/pin generates an interrupt
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* \param port The port number that generated the interrupt
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* \param pin The pin number that generated the interrupt. This is the pin
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* absolute number (i.e. 0, 1, ..., 7), not a mask
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*/
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static void
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btn_callback(uint8_t port, uint8_t pin)
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{
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if(!timer_expired(&debouncetimer)) {
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return;
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}
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timer_set(&debouncetimer, DEBOUNCE_DURATION);
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if(press_duration) {
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press_event_counter = 0;
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if(value(BUTTON_SENSOR_VALUE_TYPE_LEVEL) == BUTTON_SENSOR_PRESSED_LEVEL) {
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ctimer_set(&press_counter, press_duration, duration_exceeded_callback,
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NULL);
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} else {
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ctimer_stop(&press_counter);
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}
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}
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sensors_changed(&button_sensor);
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Init function for the User button.
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* \param type SENSORS_ACTIVE: Activate / Deactivate the sensor (value == 1
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* or 0 respectively)
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*
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* \param value Depends on the value of the type argument
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* \return Depends on the value of the type argument
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*/
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static int
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config_user(int type, int value)
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{
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switch(type) {
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case SENSORS_HW_INIT:
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button_press_duration_exceeded = process_alloc_event();
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/* Software controlled */
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GPIO_SOFTWARE_CONTROL(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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/* Set pin to input */
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GPIO_SET_INPUT(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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/* Enable edge detection */
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GPIO_DETECT_EDGE(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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/* Both Edges */
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GPIO_TRIGGER_BOTH_EDGES(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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ioc_set_over(BUTTON_USER_PORT, BUTTON_USER_PIN, IOC_OVERRIDE_PUE);
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gpio_register_callback(btn_callback, BUTTON_USER_PORT, BUTTON_USER_PIN);
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break;
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case SENSORS_ACTIVE:
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if(value) {
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GPIO_ENABLE_INTERRUPT(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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nvic_interrupt_enable(BUTTON_USER_VECTOR);
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} else {
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GPIO_DISABLE_INTERRUPT(BUTTON_USER_PORT_BASE, BUTTON_USER_PIN_MASK);
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nvic_interrupt_disable(BUTTON_USER_VECTOR);
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}
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return value;
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case BUTTON_SENSOR_CONFIG_TYPE_INTERVAL:
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press_duration = (clock_time_t)value;
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break;
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default:
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break;
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}
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, value, config_user, NULL);
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/*---------------------------------------------------------------------------*/
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/** @} */
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