nes-proj/platform/jn516x/dev/dr1174/button-sensor.c

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2015-09-21 08:57:54 +00:00
/*
* Copyright (c) 2015 NXP B.V.
* 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 NXP B.V. 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 NXP B.V. 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 NXP B.V. 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: Theo van Daele <theo.van.daele@nxp.com>
*
*/
#include "contiki.h"
#include "sys/etimer.h"
#include "lib/sensors.h"
#include "button-sensor.h"
#include <AppHardwareApi.h>
/*---------------------------------------------------------------------------*/
/* LOCAL DEFINITIONS */
/*---------------------------------------------------------------------------*/
/* #define DEBUG */
#ifdef DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
typedef enum {
APP_E_BUTTON_SW0 = 0,
#if SENSOR_BOARD_DR1199
APP_E_BUTTON_SW1,
APP_E_BUTTON_SW2,
APP_E_BUTTON_SW3,
APP_E_BUTTON_SW4,
#endif /* SENSOR_BOARD_DR1199 */
APP_E_BUTTON_NUM /* Number of buttons */
} app_e_button_t;
/* Mapping of DIO port connections to buttons. Use as mask to get button value */
#define APP_PORT_BUTTON_SW0 (8)
#if SENSOR_BOARD_DR1199
#define APP_PORT_BUTTON_SW1 (11)
#define APP_PORT_BUTTON_SW2 (12)
#define APP_PORT_BUTTON_SW3 (17)
#define APP_PORT_BUTTON_SW4 (1)
#endif /* SENSOR_BOARD_DR1199 */
/* Definition of port masks based on button mapping */
#if SENSOR_BOARD_DR1199
#define APP_BUTTONS_DIO_MASK ((1 << APP_PORT_BUTTON_SW0) | \
(1 << APP_PORT_BUTTON_SW1) | \
(1 << APP_PORT_BUTTON_SW2) | \
(1 << APP_PORT_BUTTON_SW3) | \
(1 << APP_PORT_BUTTON_SW4))
#else /* SENSOR_BOARD_DR1199 */
#define APP_BUTTONS_DIO_MASK (1 << APP_PORT_BUTTON_SW0)
#endif /* SENSOR_BOARD_DR1199 */
#define KEY_SAMPLE_TIME (CLOCK_SECOND / 20)
typedef enum {
BUTTONS_STATUS_NOT_INIT = 0,
BUTTONS_STATUS_INIT,
BUTTONS_STATUS_NOT_ACTIVE = BUTTONS_STATUS_INIT,
BUTTONS_STATUS_ACTIVE
} buttons_status_t;
/*---------------------------------------------------------------------------*/
/* LOCAL DATA DEFINITIONS */
/*---------------------------------------------------------------------------*/
const struct sensors_sensor button_sensor;
volatile static buttons_status_t buttons_status = BUTTONS_STATUS_NOT_INIT;
static int key_value = 0;
static uint8 key_map[] = { APP_PORT_BUTTON_SW0, /* APP_E_BUTTON_SW0 */
#if SENSOR_BOARD_DR1199
APP_PORT_BUTTON_SW1, /* APP_E_BUTTON_SW1 */
APP_PORT_BUTTON_SW2, /* APP_E_BUTTON_SW2 */
APP_PORT_BUTTON_SW3, /* APP_E_BUTTON_SW3 */
APP_PORT_BUTTON_SW4 /* APP_E_BUTTON_SW4 */
#endif /* SENSOR_BOARD_DR1199 */
};
/*---------------------------------------------------------------------------*/
/* LOCAL FUNCTION PROTOTYPES */
/*---------------------------------------------------------------------------*/
PROCESS(key_sampling, "Key sample");
static int get_key_value(void);
/*---------------------------------------------------------------------------*/
/* PUBLIC FUNCTIONS */
/*---------------------------------------------------------------------------*/
static int
configure(int type, int value)
{
if(type == SENSORS_HW_INIT) {
/* Called from sensor thread when started.
Configure DIO lines with buttons connected as input */
vAHI_DioSetDirection(APP_BUTTONS_DIO_MASK, 0);
/* Turn on pull-ups for DIO lines with buttons connected */
vAHI_DioSetPullup(APP_BUTTONS_DIO_MASK, 0);
PRINTF("HW_INIT BUTTONS (0x%x)\n", APP_BUTTONS_DIO_MASK);
/* Configure debounce timer. Do not run it yet. */
buttons_status = BUTTONS_STATUS_INIT;
process_start(&key_sampling, NULL);
return 1;
} else if(type == SENSORS_ACTIVE) {
if(buttons_status != BUTTONS_STATUS_NOT_INIT) {
if(value) {
/* Button sensor activated */
PRINTF("BUTTONS ACTIVATED\n");
buttons_status = BUTTONS_STATUS_ACTIVE;
} else {
/* Button sensor de-activated */
PRINTF("BUTTONS DE-ACTIVATED\n");
buttons_status = BUTTONS_STATUS_NOT_ACTIVE;
}
process_post(&key_sampling, PROCESS_EVENT_MSG, (void *)&buttons_status);
return 1;
} else {
/* Buttons must be intialised before being (de)-activated */
PRINTF("ERROR: NO HW_INIT BUTTONS\n");
return 0;
}
} else {
/* Non valid type */
return 0;
}
}
/*---------------------------------------------------------------------------*/
static int
status(int type)
{
if(type == SENSORS_ACTIVE) {
return buttons_status == BUTTONS_STATUS_ACTIVE;
} else if(type == SENSORS_READY) {
return buttons_status != BUTTONS_STATUS_NOT_INIT;
}
return 0;
}
/*---------------------------------------------------------------------------*/
static int
value(int type)
{
/* type: Not defined for the buttons interface
*/
return key_value;
}
/*---------------------------------------------------------------------------*/
/* LOCAL FUNCTIONS */
/*---------------------------------------------------------------------------*/
static int
get_key_value(void)
{
/* Function returns the actual key value. Pressed key will return '1' */
int io_value = ~u32AHI_DioReadInput() & APP_BUTTONS_DIO_MASK;
int k = 0;
int key = 0;
while(k < APP_E_BUTTON_NUM) {
if(io_value & (1 << key_map[k])) {
key |= (1 << k);
}
k++;
}
return key;
}
/* Process takes care of detecting key changes */
/*---------------------------------------------------------------------------*/
PROCESS_THREAD(key_sampling, ev, data)
{
PROCESS_BEGIN();
static struct etimer et;
static int previous_key_value = 0;
static char debounce_check = 0;
int current_key_value;
etimer_set(&et, CLOCK_SECOND / 50);
while(1) {
PROCESS_WAIT_EVENT_UNTIL((ev == PROCESS_EVENT_TIMER) || (ev == PROCESS_EVENT_MSG));
if(ev == PROCESS_EVENT_TIMER) {
/* Handle sensor reading. */
PRINTF("Key sample\n");
current_key_value = get_key_value();
if(debounce_check != 0) {
/* Check if key remained constant */
if(previous_key_value == current_key_value) {
sensors_changed(&button_sensor);
key_value = current_key_value;
debounce_check = 0;
} else {
/* Bouncing */
previous_key_value = current_key_value;
}
} else
/* Check for new key change */
if(current_key_value != previous_key_value) {
previous_key_value = current_key_value;
debounce_check = 1;
}
etimer_reset(&et);
} else {
/* ev == PROCESS_EVENT_MSG */
if(*(buttons_status_t *)data == BUTTONS_STATUS_NOT_ACTIVE) {
/* Stop sampling */
etimer_stop(&et);
} else if((*(buttons_status_t *)data == BUTTONS_STATUS_ACTIVE)) {
/* restart sampling */
etimer_restart(&et);
}
}
}
PROCESS_END();
}
/*---------------------------------------------------------------------------*/
/* Sensor defintion for sensor module */
SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, value, configure, status);
/*---------------------------------------------------------------------------*/