253 lines
8.4 KiB
C
253 lines
8.4 KiB
C
/*
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* Copyright (c) 2012, 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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*
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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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* \addtogroup cc2538dk-button-sensor
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* @{
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*
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* \file
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* Driver for the SmartRF06EB buttons
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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 <stdint.h>
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#include <string.h>
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#define BUTTON_SELECT_PORT_BASE GPIO_PORT_TO_BASE(BUTTON_SELECT_PORT)
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#define BUTTON_SELECT_PIN_MASK GPIO_PIN_MASK(BUTTON_SELECT_PIN)
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#define BUTTON_LEFT_PORT_BASE GPIO_PORT_TO_BASE(BUTTON_LEFT_PORT)
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#define BUTTON_LEFT_PIN_MASK GPIO_PIN_MASK(BUTTON_LEFT_PIN)
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#define BUTTON_RIGHT_PORT_BASE GPIO_PORT_TO_BASE(BUTTON_RIGHT_PORT)
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#define BUTTON_RIGHT_PIN_MASK GPIO_PIN_MASK(BUTTON_RIGHT_PIN)
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#define BUTTON_UP_PORT_BASE GPIO_PORT_TO_BASE(BUTTON_UP_PORT)
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#define BUTTON_UP_PIN_MASK GPIO_PIN_MASK(BUTTON_UP_PIN)
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#define BUTTON_DOWN_PORT_BASE GPIO_PORT_TO_BASE(BUTTON_DOWN_PORT)
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#define BUTTON_DOWN_PIN_MASK GPIO_PIN_MASK(BUTTON_DOWN_PIN)
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/*---------------------------------------------------------------------------*/
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static struct timer debouncetimer;
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Common initialiser for all buttons
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* \param port_base GPIO port's register offset
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* \param pin_mask Pin mask corresponding to the button's pin
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*/
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static void
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config(uint32_t port_base, uint32_t pin_mask)
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{
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/* Software controlled */
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GPIO_SOFTWARE_CONTROL(port_base, pin_mask);
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/* Set pin to input */
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GPIO_SET_INPUT(port_base, pin_mask);
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/* Enable edge detection */
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GPIO_DETECT_EDGE(port_base, pin_mask);
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/* Single edge */
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GPIO_TRIGGER_SINGLE_EDGE(port_base, pin_mask);
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/* Trigger interrupt on Falling edge */
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GPIO_DETECT_RISING(port_base, pin_mask);
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GPIO_ENABLE_INTERRUPT(port_base, pin_mask);
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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, CLOCK_SECOND / 8);
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if((port == BUTTON_SELECT_PORT) && (pin == BUTTON_SELECT_PIN)) {
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sensors_changed(&button_select_sensor);
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} else if((port == BUTTON_LEFT_PORT) && (pin == BUTTON_LEFT_PIN)) {
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sensors_changed(&button_left_sensor);
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} else if((port == BUTTON_RIGHT_PORT) && (pin == BUTTON_RIGHT_PIN)) {
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sensors_changed(&button_right_sensor);
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} else if((port == BUTTON_UP_PORT) && (pin == BUTTON_UP_PIN)) {
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sensors_changed(&button_up_sensor);
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} else if((port == BUTTON_DOWN_PORT) && (pin == BUTTON_DOWN_PIN)) {
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sensors_changed(&button_down_sensor);
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}
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Init function for the select button.
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*
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* Parameters are ignored. They have been included because the prototype is
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* dictated by the core sensor api. The return value is also not required by
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* the API but otherwise ignored.
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*
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* \param type ignored
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* \param value ignored
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* \return ignored
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*/
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static int
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config_select(int type, int value)
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{
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config(BUTTON_SELECT_PORT_BASE, BUTTON_SELECT_PIN_MASK);
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ioc_set_over(BUTTON_SELECT_PORT, BUTTON_SELECT_PIN, IOC_OVERRIDE_PUE);
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NVIC_EnableIRQ(BUTTON_SELECT_VECTOR);
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gpio_register_callback(btn_callback, BUTTON_SELECT_PORT, BUTTON_SELECT_PIN);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Init function for the left button.
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*
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* Parameters are ignored. They have been included because the prototype is
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* dictated by the core sensor api. The return value is also not required by
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* the API but otherwise ignored.
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*
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* \param type ignored
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* \param value ignored
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* \return ignored
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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(BUTTON_LEFT_PORT_BASE, BUTTON_LEFT_PIN_MASK);
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ioc_set_over(BUTTON_LEFT_PORT, BUTTON_LEFT_PIN, IOC_OVERRIDE_PUE);
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NVIC_EnableIRQ(BUTTON_LEFT_VECTOR);
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gpio_register_callback(btn_callback, BUTTON_LEFT_PORT, BUTTON_LEFT_PIN);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Init function for the right button.
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*
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* Parameters are ignored. They have been included because the prototype is
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* dictated by the core sensor api. The return value is also not required by
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* the API but otherwise ignored.
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*
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* \param type ignored
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* \param value ignored
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* \return ignored
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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(BUTTON_RIGHT_PORT_BASE, BUTTON_RIGHT_PIN_MASK);
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ioc_set_over(BUTTON_RIGHT_PORT, BUTTON_RIGHT_PIN, IOC_OVERRIDE_PUE);
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NVIC_EnableIRQ(BUTTON_RIGHT_VECTOR);
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gpio_register_callback(btn_callback, BUTTON_RIGHT_PORT, BUTTON_RIGHT_PIN);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Init function for the up button.
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*
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* Parameters are ignored. They have been included because the prototype is
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* dictated by the core sensor api. The return value is also not required by
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* the API but otherwise ignored.
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*
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* \param type ignored
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* \param value ignored
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* \return ignored
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*/
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static int
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config_up(int type, int value)
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{
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config(BUTTON_UP_PORT_BASE, BUTTON_UP_PIN_MASK);
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ioc_set_over(BUTTON_UP_PORT, BUTTON_UP_PIN, IOC_OVERRIDE_PUE);
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NVIC_EnableIRQ(BUTTON_UP_VECTOR);
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gpio_register_callback(btn_callback, BUTTON_UP_PORT, BUTTON_UP_PIN);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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/**
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* \brief Init function for the down button.
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*
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* Parameters are ignored. They have been included because the prototype is
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* dictated by the core sensor api. The return value is also not required by
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* the API but otherwise ignored.
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*
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* \param type ignored
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* \param value ignored
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* \return ignored
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*/
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static int
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config_down(int type, int value)
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{
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config(BUTTON_DOWN_PORT_BASE, BUTTON_DOWN_PIN_MASK);
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ioc_set_over(BUTTON_DOWN_PORT, BUTTON_DOWN_PIN, IOC_OVERRIDE_PUE);
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NVIC_EnableIRQ(BUTTON_DOWN_VECTOR);
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gpio_register_callback(btn_callback, BUTTON_DOWN_PORT, BUTTON_DOWN_PIN);
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return 1;
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}
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/*---------------------------------------------------------------------------*/
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void
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button_sensor_init()
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{
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timer_set(&debouncetimer, 0);
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}
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/*---------------------------------------------------------------------------*/
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SENSORS_SENSOR(button_select_sensor, BUTTON_SENSOR, NULL, config_select, NULL);
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SENSORS_SENSOR(button_left_sensor, BUTTON_SENSOR, NULL, config_left, NULL);
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SENSORS_SENSOR(button_right_sensor, BUTTON_SENSOR, NULL, config_right, NULL);
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SENSORS_SENSOR(button_up_sensor, BUTTON_SENSOR, NULL, config_up, NULL);
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SENSORS_SENSOR(button_down_sensor, BUTTON_SENSOR, NULL, config_down, NULL);
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/** @} */
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