nuttx/configs/hymini-stm32v/src/up_buttons.c
patacongo 1877006302 Adds support for the STM32F103VCT6 and for the Hy-Mini STM32v board. Contributed by Laurent Latil
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4197 42af7a65-404d-4744-a932-0658087f49c3
2011-12-17 20:07:22 +00:00

160 lines
5.7 KiB
C

/****************************************************************************
* configs/hymini-stm32v/src/up_buttons.c
*
* Copyright (C) 2009, 2011 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 THE COPYRIGHT HOLDERS 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 THE
* COPYRIGHT OWNER 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <arch/board/board.h>
#include "hymini_stm32v-internal.h"
#ifdef CONFIG_ARCH_BUTTONS
/****************************************************************************
* Definitions
****************************************************************************/
/****************************************************************************
* Private Data
****************************************************************************/
/* Pin configuration for each HY-mini button. This array is indexed by
* the BUTTON_* definitions in board.h
*/
//static const uint16_t g_buttons[NUM_BUTTONS] =
// {
// GPIO_BTN_KEYA, GPIO_BTN_KEYB
// };
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: up_buttoninit
*
* Description:
* up_buttoninit() must be called to initialize button resources. After
* that, up_buttons() may be called to collect the current state of all
* buttons or up_irqbutton() may be called to register button interrupt
* handlers.
*
****************************************************************************/
void up_buttoninit(void)
{
stm32_configgpio(GPIO_BTN_KEYA);
stm32_configgpio(GPIO_BTN_KEYB);
}
/****************************************************************************
* Name: up_buttons
****************************************************************************/
uint8_t up_buttons(void)
{
uint8_t ret = 0;
bool pinValue;
/* Check that state of each key */
/* Pin is pulled up */
pinValue = stm32_gpioread(GPIO_BTN_KEYA);
if (!pinValue)
{
// Button pressed
ret = 1 << BUTTON_KEYA;
}
/* Pin is pulled down */
pinValue = stm32_gpioread(GPIO_BTN_KEYB);
if (pinValue)
{
// Button pressed
ret |= 1 << BUTTON_KEYB;
}
return ret;
}
/************************************************************************************
* Button support.
*
* Description:
* up_buttoninit() must be called to initialize button resources. After
* that, up_buttons() may be called to collect the current state of all
* buttons or up_irqbutton() may be called to register button interrupt
* handlers.
*
* After up_buttoninit() has been called, up_buttons() may be called to
* collect the state of all buttons. up_buttons() returns an 8-bit bit set
* with each bit associated with a button. See the BUTTON_*_BIT and JOYSTICK_*_BIT
* definitions in board.h for the meaning of each bit.
*
* up_irqbutton() may be called to register an interrupt handler that will
* be called when a button is depressed or released. The ID value is a
* button enumeration value that uniquely identifies a button resource. See the
* BUTTON_* definitions in board.h for the meaning of enumeration
* value. The previous interrupt handler address is returned (so that it may
* restored, if so desired).
*
************************************************************************************/
#ifdef CONFIG_ARCH_IRQBUTTONS
xcpt_t up_irqbutton(int id, xcpt_t irqhandler)
{
xcpt_t oldhandler = NULL;
uint32_t pinset = GPIO_BTN_KEYA;
if (id == 1)
{
pinset = GPIO_BTN_KEYB;
}
if (id < 2)
{
oldhandler = stm32_gpiosetevent(pinset, true, true, true, irqhandler);
}
return oldhandler;
}
#endif
#endif /* CONFIG_ARCH_BUTTONS */