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nuttx/arch/sim/src/up_ajoystick.c

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/****************************************************************************
* arch/sim/src/up_ajoystick.c
*
* Copyright (C) 2014 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 <string.h>
#include <fcntl.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/arch.h>
#include <nuttx/input/ajoystick.h>
#include "up_internal.h"
#ifdef CONFIG_AJOYSTICK
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
# define AJOY_SUPPORTED (AJOY_BUTTON_1_BIT | AJOY_BUTTON_2_BIT | \
AJOY_BUTTON_3_BIT)
/****************************************************************************
* Private Types
****************************************************************************/
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static ajoy_buttonset_t ajoy_supported(FAR const struct ajoy_lowerhalf_s *lower);
static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
FAR struct ajoy_sample_s *sample);
static ajoy_buttonset_t ajoy_buttons(FAR const struct ajoy_lowerhalf_s *lower);
static void ajoy_enable(FAR const struct ajoy_lowerhalf_s *lower,
ajoy_buttonset_t press, ajoy_buttonset_t release,
ajoy_handler_t handler, FAR void *arg);
/****************************************************************************
* Private Data
****************************************************************************/
/* This is the button joystick lower half driver interface */
static const struct ajoy_lowerhalf_s g_ajoylower =
{
.al_supported = ajoy_supported,
.al_sample = ajoy_sample,
.al_buttons = ajoy_buttons,
.al_enable = ajoy_enable,
};
/* Driver state data */
static bool g_ajoy_valid; /* True: Sample data is valid */
static struct ajoy_sample_s g_ajoy_sample; /* Last sample data */
static ajoy_buttonset_t g_ajoy_buttons; /* Last buttons set */
static ajoy_handler_t g_ajoy_handler; /* "Interrupt" handler */
static void *g_ajoy_arg; /* Handler argument */
static ajoy_buttonset_t g_ajoy_pset; /* Set of press waited for */
static ajoy_buttonset_t g_ajoy_rset; /* Set of releases waited for */
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: ajoy_supported
*
* Description:
* Return the set of buttons supported on the button joystick device
*
****************************************************************************/
static ajoy_buttonset_t ajoy_supported(FAR const struct ajoy_lowerhalf_s *lower)
{
return (ajoy_buttonset_t)AJOY_SUPPORTED;
}
/****************************************************************************
* Name: ajoy_sample
*
* Description:
* Return the current state of all button joystick buttons
*
****************************************************************************/
static int ajoy_sample(FAR const struct ajoy_lowerhalf_s *lower,
FAR struct ajoy_sample_s *sample)
{
memcpy(sample, &g_ajoy_sample, sizeof(struct ajoy_sample_s));
g_ajoy_buttons = g_ajoy_sample.as_buttons;
g_ajoy_valid = false;
return OK;
}
/****************************************************************************
* Name: ajoy_buttons
*
* Description:
* Return the current state of button data (only)
*
****************************************************************************/
static ajoy_buttonset_t ajoy_buttons(FAR const struct ajoy_lowerhalf_s *lower)
{
g_ajoy_valid = false;
g_ajoy_buttons = g_ajoy_sample.as_buttons;
return g_ajoy_buttons;
}
/****************************************************************************
* Name: ajoy_enable
*
* Description:
* Enable interrupts on the selected set of joystick buttons. And empty
* set will disable all interrupts.
*
****************************************************************************/
static void ajoy_enable(FAR const struct ajoy_lowerhalf_s *lower,
ajoy_buttonset_t press, ajoy_buttonset_t release,
ajoy_handler_t handler, FAR void *arg)
{
g_ajoy_handler = NULL;
g_ajoy_pset = press;
g_ajoy_rset = release;
g_ajoy_arg = arg;
g_ajoy_handler = handler;
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: sim_ajoy_initialize
*
* Description:
* Initialize and register the button joystick driver
*
****************************************************************************/
int sim_ajoy_initialize(void)
{
int ret;
/* Register the joystick device as /dev/ajoy0 */
ret = ajoy_register("/dev/ajoy0", &g_ajoylower);
if (ret == OK)
{
/* Enable X11 event processing from the IDLE loop */
g_eventloop = 1;
}
return ret;
}
/****************************************************************************
* Name: up_buttonevent
****************************************************************************/
int up_buttonevent(int x, int y, int buttons)
{
ajoy_buttonset_t changed;
ajoy_buttonset_t pressed;
ajoy_buttonset_t released;
/* Same the positional data */
g_ajoy_sample.as_x = x;
g_ajoy_sample.as_y = y;
/* Map X11 buttons to joystick buttons */
g_ajoy_sample.as_buttons = 0;
if ((buttons & 1) != 0)
{
g_ajoy_sample.as_buttons |= AJOY_BUTTON_1_BIT;
}
if ((buttons & 2) != 0)
{
g_ajoy_sample.as_buttons |= AJOY_BUTTON_2_BIT;
}
if ((buttons & 4) != 0)
{
g_ajoy_sample.as_buttons |= AJOY_BUTTON_3_BIT;
}
/* Sample data is valid */
g_ajoy_valid = true;
/* Is there an "interrupt" handler attached? */
if (g_ajoy_handler)
{
/* Check button presses */
changed = g_ajoy_buttons ^ g_ajoy_sample.as_buttons;
if (changed != 0)
{
pressed = changed & (AJOY_SUPPORTED & g_ajoy_pset);
released = changed & (AJOY_SUPPORTED & ~g_ajoy_rset);
if ((pressed & g_ajoy_pset) != 0 || (released & g_ajoy_rset) != 0)
{
/* Call the interrupt handler */
g_ajoy_handler(&g_ajoylower, g_ajoy_arg);
}
}
}
return OK;
}
#endif /* CONFIG_AJOYSTICK */
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