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357 lines
10 KiB
357 lines
10 KiB
/**************************************************************************** |
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* examples/watchdog/watchdog_main.c |
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* |
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* Copyright (C) 2012 Gregory Nutt. All rights reserved. |
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* Author: Gregory Nutt <gnutt@nuttx.org> |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* 3. Neither the name NuttX nor the names of its contributors may be |
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* used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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* POSSIBILITY OF SUCH DAMAGE. |
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* |
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****************************************************************************/ |
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/**************************************************************************** |
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* Included Files |
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****************************************************************************/ |
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#include <nuttx/config.h> |
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#include <sys/types.h> |
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#include <sys/ioctl.h> |
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#include <stdio.h> |
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#include <stdlib.h> |
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#include <unistd.h> |
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#include <fcntl.h> |
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#include <errno.h> |
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#include <debug.h> |
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#include <nuttx/watchdog.h> |
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#include "watchdog.h" |
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/**************************************************************************** |
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* Pre-processor Definitions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Types |
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****************************************************************************/ |
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struct wdog_example_s |
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{ |
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uint32_t pingtime; |
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uint32_t pingdelay; |
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uint32_t timeout; |
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}; |
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/**************************************************************************** |
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* Private Function Prototypes |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Public Data |
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****************************************************************************/ |
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/**************************************************************************** |
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* Private Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: wdog_help |
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****************************************************************************/ |
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static void wdog_help(void) |
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{ |
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message("Usage: wdog [-h] [-d <pingtime] [-p <pingdelay>] [-t <timeout>]\n"); |
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message("\nInitialize the watchdog to the <timeout>. Start the watchdog\n"); |
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message("timer. Ping for the watchdog for <pingtime> seconds, then let it expire.\n"); |
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message("\nOptions include:\n"); |
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message(" [-d <pingtime>] = Selects the <delay> time in milliseconds. Default: %d\n", |
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CONFIG_EXAMPLES_WATCHDOG_PINGTIME); |
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message(" [-p <pingdelay] = Time delay between pings in milliseconds. Default: %d\n", |
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CONFIG_EXAMPLES_WATCHDOG_PINGDELAY); |
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message(" [-t timeout] = Time in milliseconds that the example will ping the watchdog\n"); |
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message(" before letting the watchdog expire. Default: %d\n", |
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CONFIG_EXAMPLES_WATCHDOG_TIMEOUT); |
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message(" [-h] = Shows this message and exits\n"); |
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} |
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/**************************************************************************** |
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* Name: arg_string |
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****************************************************************************/ |
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static int arg_string(FAR char **arg, FAR char **value) |
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{ |
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FAR char *ptr = *arg; |
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if (ptr[2] == '\0') |
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{ |
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*value = arg[1]; |
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return 2; |
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} |
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else |
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{ |
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*value = &ptr[2]; |
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return 1; |
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} |
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} |
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/**************************************************************************** |
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* Name: arg_decimal |
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****************************************************************************/ |
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static int arg_decimal(FAR char **arg, FAR long *value) |
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{ |
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FAR char *string; |
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int ret; |
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ret = arg_string(arg, &string); |
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*value = strtol(string, NULL, 10); |
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return ret; |
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} |
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/**************************************************************************** |
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* Name: parse_args |
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****************************************************************************/ |
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static void parse_args(FAR struct wdog_example_s *wdog, int argc, FAR char **argv) |
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{ |
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FAR char *ptr; |
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long value; |
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int index; |
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int nargs; |
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wdog->pingtime = CONFIG_EXAMPLES_WATCHDOG_PINGTIME; |
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wdog->pingdelay = CONFIG_EXAMPLES_WATCHDOG_PINGDELAY; |
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wdog->timeout = CONFIG_EXAMPLES_WATCHDOG_TIMEOUT; |
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for (index = 1; index < argc; ) |
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{ |
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ptr = argv[index]; |
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if (ptr[0] != '-') |
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{ |
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message("Invalid options format: %s\n", ptr); |
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exit(EXIT_SUCCESS); |
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} |
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switch (ptr[1]) |
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{ |
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case 'd': |
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nargs = arg_decimal(&argv[index], &value); |
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if (value < 1) |
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{ |
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message("Ping delay out of range: %ld\n", value); |
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exit(EXIT_FAILURE); |
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} |
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wdog->pingdelay = (uint32_t)value; |
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index += nargs; |
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break; |
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case 'p': |
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nargs = arg_decimal(&argv[index], &value); |
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if (value < 1 || value > 99) |
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{ |
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message("Ping time out of range: %ld\n", value); |
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exit(EXIT_FAILURE); |
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} |
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wdog->pingtime = (uint8_t)value; |
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index += nargs; |
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break; |
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case 't': |
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nargs = arg_decimal(&argv[index], &value); |
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if (value < 1 || value > INT_MAX) |
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{ |
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message("Duration out of range: %ld\n", value); |
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exit(EXIT_FAILURE); |
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} |
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wdog->timeout = (int)value; |
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index += nargs; |
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break; |
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case 'h': |
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wdog_help(); |
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exit(EXIT_SUCCESS); |
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default: |
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message("Unsupported option: %s\n", ptr); |
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wdog_help(); |
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exit(EXIT_FAILURE); |
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} |
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} |
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} |
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/**************************************************************************** |
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* Public Functions |
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****************************************************************************/ |
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/**************************************************************************** |
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* Name: wdog_main |
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****************************************************************************/ |
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int wdog_main(int argc, char *argv[]) |
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{ |
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struct wdog_example_s wdog; |
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#ifdef CONFIG_DEBUG_WATCHDOG |
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struct watchdog_status_s status; |
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#endif |
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long elapsed; |
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int fd; |
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int ret; |
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/* Parse the command line */ |
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parse_args(&wdog, argc, argv); |
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/* Initialization of the WATCHDOG hardware is performed by logic external to |
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* this test. |
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*/ |
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ret = up_wdginitialize(); |
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if (ret != OK) |
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{ |
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message("wdog_main: up_wdginitialize failed: %d\n", ret); |
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goto errout; |
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} |
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/* Open the watchdog device for reading */ |
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fd = open(CONFIG_EXAMPLES_WATCHDOG_DEVPATH, O_RDONLY); |
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if (fd < 0) |
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{ |
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message("wdog_main: open %s failed: %d\n", |
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CONFIG_EXAMPLES_WATCHDOG_DEVPATH, errno); |
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goto errout; |
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} |
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/* Set the watchdog timeout */ |
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ret = ioctl(fd, WDIOC_SETTIMEOUT, (unsigned long)wdog.timeout); |
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if (ret < 0) |
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{ |
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message("wdog_main: ioctl(WDIOC_SETTIMEOUT) failed: %d\n", errno); |
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goto errout_with_dev; |
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} |
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/* Then start the watchdog timer. */ |
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ret = ioctl(fd, WDIOC_START, 0); |
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if (ret < 0) |
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{ |
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message("wdog_main: ioctl(WDIOC_START) failed: %d\n", errno); |
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goto errout_with_dev; |
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} |
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/* Then ping */ |
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for (elapsed = 0; elapsed < wdog.pingtime; elapsed += wdog.pingdelay) |
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{ |
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/* Sleep for the requested amount of time */ |
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usleep(wdog.pingdelay * 1000); |
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/* Show watchdog status. Only if debug is enabled because this |
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* could interfere with the timer. |
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*/ |
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#ifdef CONFIG_DEBUG_WATCHDOG |
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ret = ioctl(fd, WDIOC_GETSTATUS, (unsigned long)&status); |
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if (ret < 0) |
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{ |
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message("wdog_main: ioctl(WDIOC_GETSTATUS) failed: %d\n", errno); |
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goto errout_with_dev; |
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} |
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message("wdog_main: flags=%08x timeout=%d timeleft=%d\n", |
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status.flags, status.timeout, status.timeleft); |
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#endif |
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/* Then ping */ |
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ret = ioctl(fd, WDIOC_KEEPALIVE, 0); |
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if (ret < 0) |
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{ |
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message("wdog_main: ioctl(WDIOC_KEEPALIVE) failed: %d\n", errno); |
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goto errout_with_dev; |
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} |
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message(" ping elapsed=%ld\n", elapsed); |
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msgflush(); |
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} |
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/* Then stop pinging */ |
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for (; ; elapsed += wdog.pingdelay) |
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{ |
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/* Sleep for the requested amount of time */ |
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usleep(wdog.pingdelay * 1000); |
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/* Show watchdog status. Only if debug is enabled because this |
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* could interfere with the timer. |
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*/ |
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#ifdef CONFIG_DEBUG_WATCHDOG |
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ret = ioctl(fd, WDIOC_GETSTATUS, (unsigned long)&status); |
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if (ret < 0) |
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{ |
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message("wdog_main: ioctl(WDIOC_GETSTATUS) failed: %d\n", errno); |
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goto errout_with_dev; |
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} |
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message("wdog_main: flags=%08x timeout=%d timeleft=%d\n", |
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status.flags, status.timeout, status.timeleft); |
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#endif |
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message(" NO ping elapsed=%ld\n", elapsed); |
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msgflush(); |
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} |
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/* We should not get here */ |
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ret = ioctl(fd, WDIOC_STOP, 0); |
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if (ret < 0) |
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{ |
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message("wdog_main: ioctl(WDIOC_STOP) failed: %d\n", errno); |
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goto errout_with_dev; |
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} |
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close(fd); |
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msgflush(); |
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return OK; |
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errout_with_dev: |
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close(fd); |
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errout: |
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msgflush(); |
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return ERROR; |
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}
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