sergiotarxz/nuttx-apps
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
52464a4412
nuttx-apps/examples/buttons/buttons_main.c
patacongo 404bb36bbd Add syslog.h; rename lib_rawprintf() to syslog() 
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5578 42af7a65-404d-4744-a932-0658087f49c3
2013-01-28 21:55:16 +00:00

500 lines
13 KiB
C
Raw Blame History

/****************************************************************************
* examples/buttons/buttons_main.c
*
* Copyright (C) 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.
*
****************************************************************************/
/****************************************************************************
* NOTE: This test exercises internal button driver interfaces. As such, it
* it relies on internal OS interfaces that are not normally available to a
* user-space program. As a result, this example cannot be used if a
* NuttX is built as a protected, supervisor kernel (CONFIG_NUTTX_KERNEL).
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <nuttx/arch.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <debug.h>
/****************************************************************************
* Definitions
****************************************************************************/
/* Configuration ************************************************************/
#ifndef CONFIG_ARCH_BUTTONS
# error "CONFIG_ARCH_BUTTONS is not defined in the configuration"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME0
# define CONFIG_EXAMPLES_BUTTONS_NAME0 "BUTTON0"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME1
# define CONFIG_EXAMPLES_BUTTONS_NAME1 "BUTTON1"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME2
# define CONFIG_EXAMPLES_BUTTONS_NAME2 "BUTTON2"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME3
# define CONFIG_EXAMPLES_BUTTONS_NAME3 "BUTTON3"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME4
# define CONFIG_EXAMPLES_BUTTONS_NAME4 "BUTTON4"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME5
# define CONFIG_EXAMPLES_BUTTONS_NAME5 "BUTTON5"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME6
# define CONFIG_EXAMPLES_BUTTONS_NAME6 "BUTTON6"
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_NAME7
# define CONFIG_EXAMPLES_BUTTONS_NAME7 "BUTTON7"
#endif
#define BUTTON_MIN 0
#define BUTTON_MAX 7
#ifndef CONFIG_EXAMPLES_BUTTONS_MIN
# define CONFIG_EXAMPLES_BUTTONS_MIN BUTTON_MIN
#endif
#ifndef CONFIG_EXAMPLES_BUTTONS_MAX
# define CONFIG_EXAMPLES_BUTTONS_MAX BUTTON_MAX
#endif
#if CONFIG_EXAMPLES_BUTTONS_MIN > CONFIG_EXAMPLES_BUTTONS_MAX
# error "CONFIG_EXAMPLES_BUTTONS_MIN > CONFIG_EXAMPLES_BUTTONS_MAX"
#endif
#if CONFIG_EXAMPLES_BUTTONS_MAX > 7
# error "CONFIG_EXAMPLES_BUTTONS_MAX > 7"
#endif
#ifndef CONFIG_EXAMPLES_IRQBUTTONS_MIN
# define CONFIG_EXAMPLES_IRQBUTTONS_MIN CONFIG_EXAMPLES_BUTTONS_MIN
#endif
#ifndef CONFIG_EXAMPLES_IRQBUTTONS_MAX
# define CONFIG_EXAMPLES_IRQBUTTONS_MAX CONFIG_EXAMPLES_BUTTONS_MAX
#endif
#if CONFIG_EXAMPLES_IRQBUTTONS_MIN > CONFIG_EXAMPLES_IRQBUTTONS_MAX
# error "CONFIG_EXAMPLES_IRQBUTTONS_MIN > CONFIG_EXAMPLES_IRQBUTTONS_MAX"
#endif
#if CONFIG_EXAMPLES_IRQBUTTONS_MAX > 7
# error "CONFIG_EXAMPLES_IRQBUTTONS_MAX > 7"
#endif
#ifndef MIN
# define MIN(a,b) (a < b ? a : b)
#endif
#ifndef MAX
# define MAX(a,b) (a > b ? a : b)
#endif
#define MIN_BUTTON MIN(CONFIG_EXAMPLES_BUTTONS_MIN, CONFIG_EXAMPLES_IRQBUTTONS_MIN)
#define MAX_BUTTON MAX(CONFIG_EXAMPLES_BUTTONS_MAX, CONFIG_EXAMPLES_IRQBUTTONS_MAX)
#define NUM_BUTTONS (MAX_BUTTON - MIN_BUTTON + 1)
#define BUTTON_INDEX(b) ((b)-MIN_BUTTON)
/****************************************************************************
* Private Types
****************************************************************************/
struct button_info_s
{
FAR const char *name; /* Name for the button */
#ifdef CONFIG_ARCH_IRQBUTTONS
xcpt_t handler; /* Button interrupt handler */
#endif
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static void show_buttons(uint8_t oldset, uint8_t newset);
#ifdef CONFIG_ARCH_IRQBUTTONS
static void button_handler(int id, int irq);
#if MIN_BUTTON < 1
static int button0_handler(int irq, FAR void *context);
#endif
#if MIN_BUTTON < 2 && MAX_BUTTON > 0
static int button1_handler(int irq, FAR void *context);
#endif
#if MIN_BUTTON < 3 && MAX_BUTTON > 1
static int button2_handler(int irq, FAR void *context);
#endif
#if MIN_BUTTON < 4 && MAX_BUTTON > 2
static int button3_handler(int irq, FAR void *context);
#endif
#if MIN_BUTTON < 5 && MAX_BUTTON > 3
static int button4_handler(int irq, FAR void *context);
#endif
#if MIN_BUTTON < 6 && MAX_BUTTON > 4
static int button5_handler(int irq, FAR void *context);
#endif
#if MIN_BUTTON < 7 && MAX_BUTTON > 5
static int button6_handler(int irq, FAR void *context);
#endif
#if MAX_BUTTON > 6
static int button7_handler(int irq, FAR void *context);
#endif
#endif /* CONFIG_ARCH_IRQBUTTONS */
/****************************************************************************
* Private Data
****************************************************************************/
/* Button Names */
static const struct button_info_s g_buttoninfo[NUM_BUTTONS] =
{
#if MIN_BUTTON < 1
{
CONFIG_EXAMPLES_BUTTONS_NAME0,
#ifdef CONFIG_ARCH_IRQBUTTONS
button0_handler
#endif
},
#endif
#if MIN_BUTTON < 2 && MAX_BUTTON > 0
{
CONFIG_EXAMPLES_BUTTONS_NAME1,
#ifdef CONFIG_ARCH_IRQBUTTONS
button1_handler
#endif
},
#endif
#if MIN_BUTTON < 3 && MAX_BUTTON > 1
{
CONFIG_EXAMPLES_BUTTONS_NAME2,
#ifdef CONFIG_ARCH_IRQBUTTONS
button2_handler
#endif
},
#endif
#if MIN_BUTTON < 4 && MAX_BUTTON > 2
{
CONFIG_EXAMPLES_BUTTONS_NAME3,
#ifdef CONFIG_ARCH_IRQBUTTONS
button3_handler
#endif
},
#endif
#if MIN_BUTTON < 5 && MAX_BUTTON > 3
{
CONFIG_EXAMPLES_BUTTONS_NAME4,
#ifdef CONFIG_ARCH_IRQBUTTONS
button4_handler
#endif
},
#endif
#if MIN_BUTTON < 6 && MAX_BUTTON > 4
{
CONFIG_EXAMPLES_BUTTONS_NAME5,
#ifdef CONFIG_ARCH_IRQBUTTONS
button5_handler
#endif
},
#endif
#if MIN_BUTTON < 7 && MAX_BUTTON > 5
{
CONFIG_EXAMPLES_BUTTONS_NAME6,
#ifdef CONFIG_ARCH_IRQBUTTONS
button6_handler
#endif
},
#endif
#if MAX_BUTTON > 6
{
CONFIG_EXAMPLES_BUTTONS_NAME7,
#ifdef CONFIG_ARCH_IRQBUTTONS
button7_handler
#endif
}
#endif
};
/* Last sampled button set */
static uint8_t g_oldset;
/* Used to limit the number of button presses */
#ifdef CONFIG_NSH_BUILTIN_APPS
static volatile long g_nbuttons;
#endif
/****************************************************************************
* Private Functions
****************************************************************************/
static void show_buttons(uint8_t oldset, uint8_t newset)
{
uint8_t chgset = oldset ^ newset;
int i;
/* Update the count of button presses shown */
#ifdef CONFIG_NSH_BUILTIN_APPS
if ((chgset & newset) != 0)
{
g_nbuttons++;
}
#endif
/* Show each button state change */
for (i = MIN_BUTTON; i <= MAX_BUTTON; i++)
{
uint8_t mask = (1 << i);
if ((chgset & mask) != 0)
{
FAR const char *state;
/* Get the button state */
if ((newset & mask) != 0)
{
state = "depressed";
}
else
{
state = "released";
}
/* Use lowsyslog() because we make be executing from an
* interrupt handler.
*/
lowsyslog(" %s %s\n", g_buttoninfo[BUTTON_INDEX(i)].name, state);
}
}
}
#ifdef CONFIG_ARCH_IRQBUTTONS
static void button_handler(int id, int irq)
{
uint8_t newset = up_buttons();
lowsyslog("IRQ:%d Button %d:%s SET:%02x:\n",
irq, id, g_buttoninfo[BUTTON_INDEX(id)].name, newset);
show_buttons(g_oldset, newset);
g_oldset = newset;
}
#if MIN_BUTTON < 1
static int button0_handler(int irq, FAR void *context)
{
button_handler(0, irq);
return OK;
}
#endif
#if MIN_BUTTON < 2 && MAX_BUTTON > 0
static int button1_handler(int irq, FAR void *context)
{
button_handler(1, irq);
return OK;
}
#endif
#if MIN_BUTTON < 3 && MAX_BUTTON > 1
static int button2_handler(int irq, FAR void *context)
{
button_handler(2, irq);
return OK;
}
#endif
#if MIN_BUTTON < 4 && MAX_BUTTON > 2
static int button3_handler(int irq, FAR void *context)
{
button_handler(3, irq);
return OK;
}
#endif
#if MIN_BUTTON < 5 && MAX_BUTTON > 3
static int button4_handler(int irq, FAR void *context)
{
button_handler(4, irq);
return OK;
}
#endif
#if MIN_BUTTON < 6 && MAX_BUTTON > 4
static int button5_handler(int irq, FAR void *context)
{
button_handler(5, irq);
return OK;
}
#endif
#if MIN_BUTTON < 7 && MAX_BUTTON > 5
static int button6_handler(int irq, FAR void *context)
{
button_handler(6, irq);
return OK;
}
#endif
#if MAX_BUTTON > 6
static int button7_handler(int irq, FAR void *context)
{
button_handler(7, irq);
return OK;
}
#endif
#endif /* CONFIG_ARCH_IRQBUTTONS */
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* buttons_main
****************************************************************************/
int buttons_main(int argc, char *argv[])
{
uint8_t newset;
irqstate_t flags;
int i;
/* If this example is configured as an NX add-on, then limit the number of
* samples that we collect before returning. Otherwise, we never return
*/
#ifdef CONFIG_NSH_BUILTIN_APPS
long maxbuttons = 1;
g_nbuttons = 0;
if (argc > 1)
{
maxbuttons = strtol(argv[1], NULL, 10);
}
lowsyslog("maxbuttons: %d\n", maxbuttons);
#endif
/* Initialize the button GPIOs */
up_buttoninit();
/* Register to recieve button interrupts */
#ifdef CONFIG_ARCH_IRQBUTTONS
for (i = CONFIG_EXAMPLES_IRQBUTTONS_MIN; i <= CONFIG_EXAMPLES_IRQBUTTONS_MAX; i++)
{
xcpt_t oldhandler = up_irqbutton(i, g_buttoninfo[BUTTON_INDEX(i)].handler);
/* Use lowsyslog() for compatibility with interrrupt handler output. */
lowsyslog("Attached handler at %p to button %d [%s], oldhandler:%p\n",
g_buttoninfo[BUTTON_INDEX(i)].handler, i,
g_buttoninfo[BUTTON_INDEX(i)].name, oldhandler);
/* Some hardware multiplexes different GPIO button sources to the same
* physical interrupt. If we register multiple such multiplexed button
* interrupts, then the second registration will overwrite the first. In
* this case, the first button interrupts may be aliased to the second
* interrupt handler (or worse, could be lost).
*/
if (oldhandler != NULL)
{
lowsyslog("WARNING: oldhandler:%p is not NULL! "
"Button events may be lost or aliased!\n",
oldhandler);
}
}
#endif
/* Poll button state */
g_oldset = up_buttons();
#ifdef CONFIG_NSH_BUILTIN_APPS
while (g_nbuttons < maxbuttons)
#else
for (;;)
#endif
{
/* Get the set of pressed and release buttons. */
newset = up_buttons();
/* Any changes from the last sample? */
if (newset != g_oldset)
{
/* Disable interrupts so that output here will not collide with
* output from an interrupt handler.
*/
flags = irqsave();
/* Use lowsyslog() for compatibility with interrrupt handler
* output.
*/
lowsyslog("POLL SET:%02x:\n", newset);
show_buttons(g_oldset, newset);
g_oldset = newset;
irqrestore(flags);
}
/* Sleep a little... but not long. This will determine how fast we
* poll for button changes.
*/
usleep(150000); /* 150 Milliseconds */
}
/* Un-register button handlers */
#if defined(CONFIG_ARCH_IRQBUTTONS) && defined(CONFIG_NSH_BUILTIN_APPS)
for (i = CONFIG_EXAMPLES_IRQBUTTONS_MIN; i <= CONFIG_EXAMPLES_IRQBUTTONS_MAX; i++)
{
(void)up_irqbutton(i, NULL);
}
#endif
return 0;
}
Reference in New Issue View Git Blame Copy Permalink