507 lines
14 KiB
C
507 lines
14 KiB
C
/****************************************************************************
|
|
* examples/buttons/buttons_main.c
|
|
*
|
|
* Copyright (C) 2011, 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.
|
|
*
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* 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_BUILD_PROTECTED or
|
|
* CONFIG_BUILD_KERNEL).
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Included Files
|
|
****************************************************************************/
|
|
|
|
#include <nuttx/config.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
|
|
/****************************************************************************
|
|
* Pre-processor 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 = board_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
|
|
****************************************************************************/
|
|
|
|
#ifdef CONFIG_BUILD_KERNEL
|
|
int main(int argc, FAR char *argv[])
|
|
#else
|
|
int buttons_main(int argc, char *argv[])
|
|
#endif
|
|
{
|
|
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 */
|
|
|
|
board_button_initialize();
|
|
|
|
/* Register to recieve button interrupts */
|
|
|
|
#ifdef CONFIG_ARCH_IRQBUTTONS
|
|
for (i = CONFIG_EXAMPLES_IRQBUTTONS_MIN; i <= CONFIG_EXAMPLES_IRQBUTTONS_MAX; i++)
|
|
{
|
|
xcpt_t oldhandler = board_button_irq(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 = board_buttons();
|
|
#ifdef CONFIG_NSH_BUILTIN_APPS
|
|
while (g_nbuttons < maxbuttons)
|
|
#else
|
|
for (;;)
|
|
#endif
|
|
{
|
|
/* Get the set of pressed and release buttons. */
|
|
|
|
newset = board_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)board_button_irq(i, NULL);
|
|
}
|
|
#endif
|
|
|
|
return 0;
|
|
}
|
|
|