242 lines
8.6 KiB
C
242 lines
8.6 KiB
C
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/*
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* Copyright (c) 2015 NXP B.V.
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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 NXP B.V. nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY NXP B.V. AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL NXP B.V. OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR 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, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* Author: Theo van Daele <theo.van.daele@nxp.com>
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*
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*/
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#include "contiki.h"
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#include "sys/etimer.h"
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#include "lib/sensors.h"
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#include "button-sensor.h"
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#include <AppHardwareApi.h>
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/*---------------------------------------------------------------------------*/
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/* LOCAL DEFINITIONS */
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/*---------------------------------------------------------------------------*/
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/* #define DEBUG */
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#ifdef DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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typedef enum {
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APP_E_BUTTON_SW0 = 0,
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#if SENSOR_BOARD_DR1199
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APP_E_BUTTON_SW1,
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APP_E_BUTTON_SW2,
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APP_E_BUTTON_SW3,
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APP_E_BUTTON_SW4,
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#endif /* SENSOR_BOARD_DR1199 */
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APP_E_BUTTON_NUM /* Number of buttons */
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} app_e_button_t;
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/* Mapping of DIO port connections to buttons. Use as mask to get button value */
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#define APP_PORT_BUTTON_SW0 (8)
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#if SENSOR_BOARD_DR1199
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#define APP_PORT_BUTTON_SW1 (11)
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#define APP_PORT_BUTTON_SW2 (12)
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#define APP_PORT_BUTTON_SW3 (17)
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#define APP_PORT_BUTTON_SW4 (1)
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#endif /* SENSOR_BOARD_DR1199 */
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/* Definition of port masks based on button mapping */
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#if SENSOR_BOARD_DR1199
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#define APP_BUTTONS_DIO_MASK ((1 << APP_PORT_BUTTON_SW0) | \
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(1 << APP_PORT_BUTTON_SW1) | \
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(1 << APP_PORT_BUTTON_SW2) | \
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(1 << APP_PORT_BUTTON_SW3) | \
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(1 << APP_PORT_BUTTON_SW4))
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#else /* SENSOR_BOARD_DR1199 */
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#define APP_BUTTONS_DIO_MASK (1 << APP_PORT_BUTTON_SW0)
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#endif /* SENSOR_BOARD_DR1199 */
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#define KEY_SAMPLE_TIME (CLOCK_SECOND / 20)
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typedef enum {
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BUTTONS_STATUS_NOT_INIT = 0,
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BUTTONS_STATUS_INIT,
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BUTTONS_STATUS_NOT_ACTIVE = BUTTONS_STATUS_INIT,
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BUTTONS_STATUS_ACTIVE
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} buttons_status_t;
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/*---------------------------------------------------------------------------*/
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/* LOCAL DATA DEFINITIONS */
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/*---------------------------------------------------------------------------*/
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const struct sensors_sensor button_sensor;
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volatile static buttons_status_t buttons_status = BUTTONS_STATUS_NOT_INIT;
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static int key_value = 0;
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static uint8 key_map[] = { APP_PORT_BUTTON_SW0, /* APP_E_BUTTON_SW0 */
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#if SENSOR_BOARD_DR1199
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APP_PORT_BUTTON_SW1, /* APP_E_BUTTON_SW1 */
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APP_PORT_BUTTON_SW2, /* APP_E_BUTTON_SW2 */
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APP_PORT_BUTTON_SW3, /* APP_E_BUTTON_SW3 */
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APP_PORT_BUTTON_SW4 /* APP_E_BUTTON_SW4 */
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#endif /* SENSOR_BOARD_DR1199 */
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};
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/*---------------------------------------------------------------------------*/
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/* LOCAL FUNCTION PROTOTYPES */
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/*---------------------------------------------------------------------------*/
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PROCESS(key_sampling, "Key sample");
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static int get_key_value(void);
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/*---------------------------------------------------------------------------*/
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/* PUBLIC FUNCTIONS */
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/*---------------------------------------------------------------------------*/
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static int
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configure(int type, int value)
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{
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if(type == SENSORS_HW_INIT) {
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/* Called from sensor thread when started.
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Configure DIO lines with buttons connected as input */
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vAHI_DioSetDirection(APP_BUTTONS_DIO_MASK, 0);
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/* Turn on pull-ups for DIO lines with buttons connected */
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vAHI_DioSetPullup(APP_BUTTONS_DIO_MASK, 0);
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PRINTF("HW_INIT BUTTONS (0x%x)\n", APP_BUTTONS_DIO_MASK);
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/* Configure debounce timer. Do not run it yet. */
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buttons_status = BUTTONS_STATUS_INIT;
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process_start(&key_sampling, NULL);
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return 1;
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} else if(type == SENSORS_ACTIVE) {
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if(buttons_status != BUTTONS_STATUS_NOT_INIT) {
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if(value) {
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/* Button sensor activated */
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PRINTF("BUTTONS ACTIVATED\n");
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buttons_status = BUTTONS_STATUS_ACTIVE;
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} else {
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/* Button sensor de-activated */
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PRINTF("BUTTONS DE-ACTIVATED\n");
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buttons_status = BUTTONS_STATUS_NOT_ACTIVE;
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}
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process_post(&key_sampling, PROCESS_EVENT_MSG, (void *)&buttons_status);
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return 1;
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} else {
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/* Buttons must be intialised before being (de)-activated */
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PRINTF("ERROR: NO HW_INIT BUTTONS\n");
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return 0;
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}
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} else {
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/* Non valid type */
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return 0;
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}
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}
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/*---------------------------------------------------------------------------*/
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static int
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status(int type)
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{
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if(type == SENSORS_ACTIVE) {
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return buttons_status == BUTTONS_STATUS_ACTIVE;
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} else if(type == SENSORS_READY) {
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return buttons_status != BUTTONS_STATUS_NOT_INIT;
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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(int type)
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{
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/* type: Not defined for the buttons interface
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*/
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return key_value;
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}
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/*---------------------------------------------------------------------------*/
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/* LOCAL FUNCTIONS */
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/*---------------------------------------------------------------------------*/
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static int
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get_key_value(void)
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{
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/* Function returns the actual key value. Pressed key will return '1' */
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int io_value = ~u32AHI_DioReadInput() & APP_BUTTONS_DIO_MASK;
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int k = 0;
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int key = 0;
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while(k < APP_E_BUTTON_NUM) {
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if(io_value & (1 << key_map[k])) {
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key |= (1 << k);
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}
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k++;
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}
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return key;
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}
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/* Process takes care of detecting key changes */
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/*---------------------------------------------------------------------------*/
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PROCESS_THREAD(key_sampling, ev, data)
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{
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PROCESS_BEGIN();
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static struct etimer et;
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static int previous_key_value = 0;
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static char debounce_check = 0;
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int current_key_value;
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etimer_set(&et, CLOCK_SECOND / 50);
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while(1) {
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PROCESS_WAIT_EVENT_UNTIL((ev == PROCESS_EVENT_TIMER) || (ev == PROCESS_EVENT_MSG));
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if(ev == PROCESS_EVENT_TIMER) {
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/* Handle sensor reading. */
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PRINTF("Key sample\n");
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current_key_value = get_key_value();
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if(debounce_check != 0) {
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/* Check if key remained constant */
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if(previous_key_value == current_key_value) {
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sensors_changed(&button_sensor);
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key_value = current_key_value;
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debounce_check = 0;
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} else {
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/* Bouncing */
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previous_key_value = current_key_value;
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}
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} else
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/* Check for new key change */
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if(current_key_value != previous_key_value) {
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previous_key_value = current_key_value;
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debounce_check = 1;
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}
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etimer_reset(&et);
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} else {
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/* ev == PROCESS_EVENT_MSG */
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if(*(buttons_status_t *)data == BUTTONS_STATUS_NOT_ACTIVE) {
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/* Stop sampling */
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etimer_stop(&et);
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} else if((*(buttons_status_t *)data == BUTTONS_STATUS_ACTIVE)) {
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/* restart sampling */
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etimer_restart(&et);
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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/* Sensor defintion for sensor module */
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SENSORS_SENSOR(button_sensor, BUTTON_SENSOR, value, configure, status);
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/*---------------------------------------------------------------------------*/
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