161 lines
4.3 KiB
C
161 lines
4.3 KiB
C
/****************************************************************************
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* boards/arm/stm32/photon/src/stm32_wdt.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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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 <errno.h>
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#include <debug.h>
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#include <sched.h>
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#include <stdio.h>
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#include <fcntl.h>
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#include <nuttx/signal.h>
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#include <nuttx/fs/fs.h>
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#include <nuttx/timers/watchdog.h>
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#include <arch/board/board.h>
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#include <nuttx/kthread.h>
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#include <nuttx/clock.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/* Watchdog daemon thread */
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#if defined(CONFIG_PHOTON_WDG_THREAD)
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static int wdog_daemon(int argc, char *argv[])
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{
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struct file filestruct;
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int ret;
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/* Open watchdog device */
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ret = file_open(&filestruct, CONFIG_WATCHDOG_DEVPATH, O_RDONLY);
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if (ret < 0)
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{
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wderr("ERROR: open %s failed: %d\n", CONFIG_WATCHDOG_DEVPATH, ret);
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return ret;
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}
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/* Start watchdog timer */
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ret = file_ioctl(&filestruct, WDIOC_START, 0);
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if (ret < 0)
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{
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wderr("ERROR: file_ioctl(WDIOC_START) failed: %d\n", ret);
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goto exit_close_dev;
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}
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while (1)
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{
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nxsig_usleep((CONFIG_PHOTON_WDG_THREAD_INTERVAL)*1000);
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/* Send keep alive ioctl */
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ret = file_ioctl(&filestruct, WDIOC_KEEPALIVE, 0);
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if (ret < 0)
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{
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wderr("ERROR: file_ioctl(WDIOC_KEEPALIVE) failed: %d\n", ret);
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break;
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}
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}
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exit_close_dev:
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/* Close watchdog device and exit. */
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file_close(&filestruct);
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return ret;
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}
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#endif /* CONFIG_PHOTON_WDG_THREAD */
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/****************************************************************************
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* Name: photon_watchdog_initialize()
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*
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* Description:
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* Perform architecture-specific initialization of the Watchdog hardware.
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* This interface must be provided by all configurations using
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* apps/examples/watchdog
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*
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****************************************************************************/
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int photon_watchdog_initialize(void)
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{
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struct file filestruct;
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int ret = 0;
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/* Open the watchdog device */
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ret = file_open(&filestruct, CONFIG_WATCHDOG_DEVPATH, O_RDONLY);
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if (ret < 0)
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{
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wderr("ERROR: open %s failed: %d\n", CONFIG_WATCHDOG_DEVPATH, ret);
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return ret;
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}
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/* Set the watchdog timeout */
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#ifdef CONFIG_PHOTON_IWDG
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wdinfo("Timeout = %d.\n", CONFIG_PHOTON_IWDG_TIMEOUT);
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ret = file_ioctl(&filestruct, WDIOC_SETTIMEOUT,
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(unsigned long)CONFIG_PHOTON_IWDG_TIMEOUT);
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#else
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# error "No watchdog configured"
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#endif
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/* Close watchdog as it is not needed here anymore */
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file_close(&filestruct);
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if (ret < 0)
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{
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wderr("ERROR: watchdog configuration failed: %d\n", ret);
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return ret;
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}
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#if defined(CONFIG_PHOTON_WDG_THREAD)
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/* Spawn wdog daemon thread */
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int taskid = kthread_create(CONFIG_PHOTON_WDG_THREAD_NAME,
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CONFIG_PHOTON_WDG_THREAD_PRIORITY,
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CONFIG_PHOTON_WDG_THREAD_STACKSIZE,
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wdog_daemon, NULL);
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if (taskid <= 0)
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{
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wderr("ERROR: cannot spawn wdog_daemon thread\n");
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return ERROR;
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}
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#endif /* CONFIG_PHOTON_WDG_THREAD */
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return OK;
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}
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