218 lines
7.2 KiB
C
218 lines
7.2 KiB
C
/*
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* Copyright (c) 2015, Texas Instruments Incorporated - http://www.ti.com/
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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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* 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 launchpad-button-sensor
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* @{
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*
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* \file
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* Driver for LaunchPad buttons
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*/
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/*---------------------------------------------------------------------------*/
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#include "contiki.h"
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#include "lib/sensors.h"
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#include "launchpad/button-sensor.h"
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#include "gpio-interrupt.h"
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#include "sys/timer.h"
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#include "lpm.h"
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#include "ti-lib.h"
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#include <stdint.h>
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/*---------------------------------------------------------------------------*/
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#ifdef BUTTON_SENSOR_CONF_ENABLE_SHUTDOWN
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#define BUTTON_SENSOR_ENABLE_SHUTDOWN BUTTON_SENSOR_CONF_ENABLE_SHUTDOWN
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#else
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#define BUTTON_SENSOR_ENABLE_SHUTDOWN 1
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#endif
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/*---------------------------------------------------------------------------*/
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#define BUTTON_GPIO_CFG (IOC_CURRENT_2MA | IOC_STRENGTH_AUTO | \
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IOC_IOPULL_UP | IOC_SLEW_DISABLE | \
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IOC_HYST_DISABLE | IOC_BOTH_EDGES | \
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IOC_INT_ENABLE | IOC_IOMODE_NORMAL | \
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IOC_NO_WAKE_UP | IOC_INPUT_ENABLE)
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/*---------------------------------------------------------------------------*/
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#define DEBOUNCE_DURATION (CLOCK_SECOND >> 5)
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struct btn_timer {
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struct timer debounce;
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clock_time_t start;
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clock_time_t duration;
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};
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static struct btn_timer left_timer, right_timer;
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/*---------------------------------------------------------------------------*/
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static void
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button_press_handler(uint8_t ioid)
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{
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if(ioid == BOARD_IOID_KEY_LEFT) {
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if(!timer_expired(&left_timer.debounce)) {
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return;
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}
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timer_set(&left_timer.debounce, DEBOUNCE_DURATION);
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/*
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* Start press duration counter on press (falling), notify on release
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* (rising)
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*/
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if(ti_lib_gpio_pin_read(BOARD_KEY_LEFT) == 0) {
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left_timer.start = clock_time();
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left_timer.duration = 0;
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} else {
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left_timer.duration = clock_time() - left_timer.start;
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sensors_changed(&button_left_sensor);
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}
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}
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if(ioid == BOARD_IOID_KEY_RIGHT) {
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if(BUTTON_SENSOR_ENABLE_SHUTDOWN == 0) {
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if(!timer_expired(&right_timer.debounce)) {
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return;
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}
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timer_set(&right_timer.debounce, DEBOUNCE_DURATION);
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/*
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* Start press duration counter on press (falling), notify on release
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* (rising)
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*/
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if(ti_lib_gpio_pin_read(BOARD_KEY_RIGHT) == 0) {
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right_timer.start = clock_time();
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right_timer.duration = 0;
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} else {
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right_timer.duration = clock_time() - right_timer.start;
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sensors_changed(&button_right_sensor);
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}
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} else {
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lpm_shutdown(BOARD_IOID_KEY_RIGHT, IOC_IOPULL_UP, IOC_WAKE_ON_LOW);
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}
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}
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}
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/*---------------------------------------------------------------------------*/
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static void
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config_buttons(int type, int c, uint32_t key)
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{
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switch(type) {
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case SENSORS_HW_INIT:
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ti_lib_gpio_event_clear(1 << key);
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ti_lib_ioc_port_configure_set(key, IOC_PORT_GPIO, BUTTON_GPIO_CFG);
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ti_lib_gpio_dir_mode_set((1 << key), GPIO_DIR_MODE_IN);
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gpio_interrupt_register_handler(key, button_press_handler);
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break;
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case SENSORS_ACTIVE:
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if(c) {
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ti_lib_gpio_event_clear(1 << key);
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ti_lib_ioc_port_configure_set(key, IOC_PORT_GPIO, BUTTON_GPIO_CFG);
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ti_lib_gpio_dir_mode_set((1 << key), GPIO_DIR_MODE_IN);
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ti_lib_ioc_int_enable(key);
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} else {
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ti_lib_ioc_int_disable(key);
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}
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break;
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default:
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break;
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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config_left(int type, int value)
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{
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config_buttons(type, value, BOARD_IOID_KEY_LEFT);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static int
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config_right(int type, int value)
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{
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config_buttons(type, value, BOARD_IOID_KEY_RIGHT);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type, uint32_t key_io_id)
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{
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switch(type) {
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case SENSORS_ACTIVE:
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case SENSORS_READY:
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if(ti_lib_ioc_port_configure_get(key_io_id) & IOC_INT_ENABLE) {
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return 1;
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}
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break;
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default:
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break;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value_left(int type)
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{
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if(type == BUTTON_SENSOR_VALUE_STATE) {
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return ti_lib_gpio_pin_read(BOARD_KEY_LEFT) == 0 ?
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BUTTON_SENSOR_VALUE_PRESSED : BUTTON_SENSOR_VALUE_RELEASED;
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} else if(type == BUTTON_SENSOR_VALUE_DURATION) {
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return (int)left_timer.duration;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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value_right(int type)
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{
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if(type == BUTTON_SENSOR_VALUE_STATE) {
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return ti_lib_gpio_pin_read(BOARD_KEY_RIGHT) == 0 ?
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BUTTON_SENSOR_VALUE_PRESSED : BUTTON_SENSOR_VALUE_RELEASED;
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} else if(type == BUTTON_SENSOR_VALUE_DURATION) {
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return (int)right_timer.duration;
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}
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return 0;
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}
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/*---------------------------------------------------------------------------*/
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static int
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status_left(int type)
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{
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return status(type, BOARD_IOID_KEY_LEFT);
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}
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/*---------------------------------------------------------------------------*/
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static int
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status_right(int type)
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{
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return status(type, BOARD_IOID_KEY_RIGHT);
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(button_left_sensor, BUTTON_SENSOR, value_left, config_left,
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status_left);
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SENSORS_SENSOR(button_right_sensor, BUTTON_SENSOR, value_right, config_right,
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status_right);
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/*---------------------------------------------------------------------------*/
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/** @} */
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