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git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@4663 7fd9a85b-ad96-42d3-883c-3090e2eb8679sbg
patacongo
13 years ago
6 changed files with 269 additions and 0 deletions
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/****************************************************************************
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* configs/ubw32/src/up_buttons.c |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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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 <stdbool.h> |
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#include <debug.h> |
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#include <arch/board/board.h> |
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#include "chip.h" |
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#include "up_arch.h" |
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#include "pic32mx-internal.h" |
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#include "ubw-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 UBW32 board has three buttons.
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* |
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* PROGRAM RE7 Pulled high, Grounded/low when depressed |
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* USER RE6 Pulled high, Grounded/low when depressed |
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* RESET Not software accessible |
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*/ |
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#define GPIO_PROGRAM (GPIO_INPUT|GPIO_INT|GPIO_PORTE|GPIO_PIN7) |
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#define GPIO_USER (GPIO_INPUT|GPIO_INT|GPIO_PORTE|GPIO_PIN6) |
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/* Change notification numbers:
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* |
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* RE7 -> No change notification associated with RE7 |
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* RE6 -> No change notification associated with RE6 |
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*/ |
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#define CN_PROGRAM |
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#define CN_USER |
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/****************************************************************************
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* Private Data |
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****************************************************************************/ |
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/* Pin configuration for each button */ |
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static const uint16_t g_buttonset[NUM_BUTTONS] = |
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{ |
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GPIO_PROGRAM GPIO_USER |
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} |
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/* Change notification number for each button */ |
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#ifdef CONFIG_ARCH_IRQBUTTONS |
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static const uint8_t g_buttoncn[NUM_BUTTONS] = |
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{ |
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CN_PROGRAM, CN_USER |
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} |
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#endif |
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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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int i; |
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/* Configure input pins */ |
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for (i = 0; i < NUM_BUTTONS; i++) |
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{ |
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pic32mx_configgpio(g_buttonset[i]); |
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} |
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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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int id; |
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/* Configure input pins */ |
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for (id = 0; id < NUM_BUTTONS; id++) |
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{ |
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if (pic32mx_gpioread(g_buttonset[id])) |
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{ |
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ret |= (1 << id); |
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} |
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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 definitions in |
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* 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_* definitions in board.h for the meaning of enumeration value. The |
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* previous interrupt handler address is returned (so that it may restored, if |
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* so desired). |
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* |
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* Interrupts are automatically enabled when the button handler is attached and |
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* automatically disabled when the button handler is detached. |
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* |
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* When an interrupt occurs, it is due to a change on the GPIO input pin |
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* associated with the button. In that case, all attached change |
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* notification handlers will be called. Each handler must maintain state |
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* and determine if the unlying GPIO button input value changed. |
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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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if (id < NUM_BUTTONS) |
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{ |
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oldhandler = pic32mx_gpioattach(g_buttonset[id], g_buttoncn[id], irqhandler); |
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if (irqbuttron) |
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{ |
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pic32mx_gpioirqenable(g_buttoncn[id]); |
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}
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} |
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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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