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-rw-r--r--apps/examples/watchdog/watchdog_main.c357
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diff --git a/apps/examples/watchdog/watchdog_main.c b/apps/examples/watchdog/watchdog_main.c
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--- a/apps/examples/watchdog/watchdog_main.c
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-/****************************************************************************
- * examples/watchdog/watchdog_main.c
- *
- * Copyright (C) 2012 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 <sys/types.h>
-#include <sys/ioctl.h>
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <fcntl.h>
-#include <errno.h>
-#include <debug.h>
-
-#include <nuttx/watchdog.h>
-
-#include "watchdog.h"
-
-/****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
-
-/****************************************************************************
- * Private Types
- ****************************************************************************/
-
-struct wdog_example_s
-{
- uint32_t pingtime;
- uint32_t pingdelay;
- uint32_t timeout;
-};
-
-/****************************************************************************
- * Private Function Prototypes
- ****************************************************************************/
-
-/****************************************************************************
- * Private Data
- ****************************************************************************/
-
-/****************************************************************************
- * Public Data
- ****************************************************************************/
-
-/****************************************************************************
- * Private Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: wdog_help
- ****************************************************************************/
-
-static void wdog_help(void)
-{
- message("Usage: wdog [-h] [-d <pingtime] [-p <pingdelay>] [-t <timeout>]\n");
- message("\nInitialize the watchdog to the <timeout>. Start the watchdog\n");
- message("timer. Ping for the watchdog for <pingtime> seconds, then let it expire.\n");
- message("\nOptions include:\n");
- message(" [-d <pingtime>] = Selects the <delay> time in milliseconds. Default: %d\n",
- CONFIG_EXAMPLES_WATCHDOG_PINGTIME);
- message(" [-p <pingdelay] = Time delay between pings in milliseconds. Default: %d\n",
- CONFIG_EXAMPLES_WATCHDOG_PINGDELAY);
- message(" [-t timeout] = Time in milliseconds that the example will ping the watchdog\n");
- message(" before letting the watchdog expire. Default: %d\n",
- CONFIG_EXAMPLES_WATCHDOG_TIMEOUT);
- message(" [-h] = Shows this message and exits\n");
-}
-
-/****************************************************************************
- * Name: arg_string
- ****************************************************************************/
-
-static int arg_string(FAR char **arg, FAR char **value)
-{
- FAR char *ptr = *arg;
-
- if (ptr[2] == '\0')
- {
- *value = arg[1];
- return 2;
- }
- else
- {
- *value = &ptr[2];
- return 1;
- }
-}
-
-/****************************************************************************
- * Name: arg_decimal
- ****************************************************************************/
-
-static int arg_decimal(FAR char **arg, FAR long *value)
-{
- FAR char *string;
- int ret;
-
- ret = arg_string(arg, &string);
- *value = strtol(string, NULL, 10);
- return ret;
-}
-
-/****************************************************************************
- * Name: parse_args
- ****************************************************************************/
-
-static void parse_args(FAR struct wdog_example_s *wdog, int argc, FAR char **argv)
-{
- FAR char *ptr;
- long value;
- int index;
- int nargs;
-
- wdog->pingtime = CONFIG_EXAMPLES_WATCHDOG_PINGTIME;
- wdog->pingdelay = CONFIG_EXAMPLES_WATCHDOG_PINGDELAY;
- wdog->timeout = CONFIG_EXAMPLES_WATCHDOG_TIMEOUT;
-
- for (index = 1; index < argc; )
- {
- ptr = argv[index];
- if (ptr[0] != '-')
- {
- message("Invalid options format: %s\n", ptr);
- exit(EXIT_SUCCESS);
- }
-
- switch (ptr[1])
- {
- case 'd':
- nargs = arg_decimal(&argv[index], &value);
- if (value < 1)
- {
- message("Ping delay out of range: %ld\n", value);
- exit(EXIT_FAILURE);
- }
-
- wdog->pingdelay = (uint32_t)value;
- index += nargs;
- break;
-
- case 'p':
- nargs = arg_decimal(&argv[index], &value);
- if (value < 1 || value > 99)
- {
- message("Ping time out of range: %ld\n", value);
- exit(EXIT_FAILURE);
- }
-
- wdog->pingtime = (uint8_t)value;
- index += nargs;
- break;
-
- case 't':
- nargs = arg_decimal(&argv[index], &value);
- if (value < 1 || value > INT_MAX)
- {
- message("Duration out of range: %ld\n", value);
- exit(EXIT_FAILURE);
- }
-
- wdog->timeout = (int)value;
- index += nargs;
- break;
-
- case 'h':
- wdog_help();
- exit(EXIT_SUCCESS);
-
- default:
- message("Unsupported option: %s\n", ptr);
- wdog_help();
- exit(EXIT_FAILURE);
- }
- }
-}
-
-/****************************************************************************
- * Public Functions
- ****************************************************************************/
-
-/****************************************************************************
- * Name: wdog_main
- ****************************************************************************/
-
-int wdog_main(int argc, char *argv[])
-{
- struct wdog_example_s wdog;
-#ifdef CONFIG_DEBUG_WATCHDOG
- struct watchdog_status_s status;
-#endif
- long elapsed;
- int fd;
- int ret;
-
- /* Parse the command line */
-
- parse_args(&wdog, argc, argv);
-
- /* Initialization of the WATCHDOG hardware is performed by logic external to
- * this test.
- */
-
- ret = up_wdginitialize();
- if (ret != OK)
- {
- message("wdog_main: up_wdginitialize failed: %d\n", ret);
- goto errout;
- }
-
- /* Open the watchdog device for reading */
-
- fd = open(CONFIG_EXAMPLES_WATCHDOG_DEVPATH, O_RDONLY);
- if (fd < 0)
- {
- message("wdog_main: open %s failed: %d\n",
- CONFIG_EXAMPLES_WATCHDOG_DEVPATH, errno);
- goto errout;
- }
-
- /* Set the watchdog timeout */
-
- ret = ioctl(fd, WDIOC_SETTIMEOUT, (unsigned long)wdog.timeout);
- if (ret < 0)
- {
- message("wdog_main: ioctl(WDIOC_SETTIMEOUT) failed: %d\n", errno);
- goto errout_with_dev;
- }
-
- /* Then start the watchdog timer. */
-
- ret = ioctl(fd, WDIOC_START, 0);
- if (ret < 0)
- {
- message("wdog_main: ioctl(WDIOC_START) failed: %d\n", errno);
- goto errout_with_dev;
- }
-
- /* Then ping */
-
- for (elapsed = 0; elapsed < wdog.pingtime; elapsed += wdog.pingdelay)
- {
- /* Sleep for the requested amount of time */
-
- usleep(wdog.pingdelay * 1000);
-
- /* Show watchdog status. Only if debug is enabled because this
- * could interfere with the timer.
- */
-
-#ifdef CONFIG_DEBUG_WATCHDOG
- ret = ioctl(fd, WDIOC_GETSTATUS, (unsigned long)&status);
- if (ret < 0)
- {
- message("wdog_main: ioctl(WDIOC_GETSTATUS) failed: %d\n", errno);
- goto errout_with_dev;
- }
- message("wdog_main: flags=%08x timeout=%d timeleft=%d\n",
- status.flags, status.timeout, status.timeleft);
-#endif
-
- /* Then ping */
-
- ret = ioctl(fd, WDIOC_KEEPALIVE, 0);
- if (ret < 0)
- {
- message("wdog_main: ioctl(WDIOC_KEEPALIVE) failed: %d\n", errno);
- goto errout_with_dev;
- }
-
- message(" ping elapsed=%ld\n", elapsed);
- msgflush();
- }
-
- /* Then stop pinging */
-
- for (; ; elapsed += wdog.pingdelay)
- {
- /* Sleep for the requested amount of time */
-
- usleep(wdog.pingdelay * 1000);
-
- /* Show watchdog status. Only if debug is enabled because this
- * could interfere with the timer.
- */
-
-#ifdef CONFIG_DEBUG_WATCHDOG
- ret = ioctl(fd, WDIOC_GETSTATUS, (unsigned long)&status);
- if (ret < 0)
- {
- message("wdog_main: ioctl(WDIOC_GETSTATUS) failed: %d\n", errno);
- goto errout_with_dev;
- }
- message("wdog_main: flags=%08x timeout=%d timeleft=%d\n",
- status.flags, status.timeout, status.timeleft);
-#endif
-
- message(" NO ping elapsed=%ld\n", elapsed);
- msgflush();
- }
-
- /* We should not get here */
-
- ret = ioctl(fd, WDIOC_STOP, 0);
- if (ret < 0)
- {
- message("wdog_main: ioctl(WDIOC_STOP) failed: %d\n", errno);
- goto errout_with_dev;
- }
-
- close(fd);
- msgflush();
- return OK;
-
-errout_with_dev:
- close(fd);
-errout:
- msgflush();
- return ERROR;
-}
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