nes-proj/platform/srf06-cc26xx/launchpad/button-sensor.c
2016-01-28 11:23:20 +00:00

219 lines
7.2 KiB
C

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