2011-08-16 00:11:24 +02:00
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/****************************************************************************
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* configs/twr-k60n512/src/up_buttons.c
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*
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* Copyright (C) 2011 Gregory Nutt. All rights reserved.
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2012-09-13 20:32:24 +02:00
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* Author: Gregory Nutt <gnutt@nuttx.org>
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2011-08-16 00:11:24 +02:00
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* 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 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 OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <stdint.h>
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#include <arch/board/board.h>
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#include "twrk60-internal.h"
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#ifdef CONFIG_ARCH_BUTTONS
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/****************************************************************************
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* Definitions
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****************************************************************************/
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/* The TWR-K60N512 has user buttons (plus a reset button):
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*
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* 1. SW1 (IRQ0) PTA19
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* 2. SW2 (IRQ1) PTE26
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*/
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: up_buttoninit
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*
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* Description:
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* up_buttoninit() must be called to initialize button resources. After
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* that, up_buttons() may be called to collect the current state of all
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* buttons or up_irqbutton() may be called to register button interrupt
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* handlers.
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*
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****************************************************************************/
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void up_buttoninit(void)
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{
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/* Configure the two buttons as inputs */
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kinetis_pinconfig(GPIO_SW1);
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kinetis_pinconfig(GPIO_SW2);
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}
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/****************************************************************************
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* Name: up_buttons
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****************************************************************************/
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uint8_t up_buttons(void)
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{
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uint8_t ret = 0;
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if (kinetis_gpioread(GPIO_SW1))
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{
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ret |= BUTTON_SW1_BIT;
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}
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if (kinetis_gpioread(GPIO_SW2))
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{
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ret |= BUTTON_SW2_BIT;
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}
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return ret
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}
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/************************************************************************************
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* Button support.
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*
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* Description:
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* up_buttoninit() must be called to initialize button resources. After
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* that, up_buttons() may be called to collect the current state of all
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* buttons or up_irqbutton() may be called to register button interrupt
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* handlers.
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*
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* After up_buttoninit() has been called, up_buttons() may be called to
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* collect the state of all buttons. up_buttons() returns an 8-bit bit set
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* with each bit associated with a button. See the BUTTON_*_BIT and JOYSTICK_*_BIT
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* definitions in board.h for the meaning of each bit.
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*
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* up_irqbutton() may be called to register an interrupt handler that will
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* be called when a button is depressed or released. The ID value is a
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* button enumeration value that uniquely identifies a button resource. See the
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* BUTTON_* and JOYSTICK_* definitions in board.h for the meaning of enumeration
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* value. The previous interrupt handler address is returned (so that it may
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* restored, if so desired).
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*
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************************************************************************************/
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#ifdef CONFIG_ARCH_IRQBUTTONS
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xcpt_t up_irqbutton(int id, xcpt_t irqhandler)
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{
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xcpt_t oldhandler = NULL;
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uint32_t pinset;
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/* Map the button id to the GPIO bit set. */
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if (id == BUTTON_SW1)
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{
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pinset = GPIO_SW1;
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}
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else if (id == BUTTON_SW2)
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{
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pinset = GPIO_SW2;
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}
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else
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{
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return NULL;
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}
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/* The button has already been configured as an interrupting input (by
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* up_buttoninit() above).
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*
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* Attach the new button handler.
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*/
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oldhandler = knetis_pinirqattach(pinset, irqhandler);
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/* Then make sure that interupts are enabled on the pin */
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kinetis_pindmaenable(pinset);
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return oldhandler;
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}
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#endif
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#endif /* CONFIG_ARCH_BUTTONS */
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