circuitpython/shared-bindings/watchdog/__init__.c

111 lines
4.1 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Paul Sokolovsky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <string.h>
#include "py/runtime.h"
#include "shared-bindings/watchdog/__init__.h"
#include "shared-bindings/watchdog/WatchDogMode.h"
//| """Watchdog Timer
//|
//| The `watchdog` module provides support for a Watchdog Timer. This timer will reset the device
//| if it hasn't been fed after a specified amount of time. This is useful to ensure the board
//| has not crashed or locked up. Note that on some platforms the watchdog timer cannot be disabled
//| once it has been enabled.
//|
//| The `WatchDogTimer` is used to restart the system when the application crashes and ends
//| up into a non recoverable state. Once started it cannot be stopped or
//| reconfigured in any way. After enabling, the application must "feed" the
//| watchdog periodically to prevent it from expiring and resetting the system.
//|
//| Example usage::
//|
//| from microcontroller import watchdog as w
//| from watchdog import WatchDogMode
//| w.timeout=2.5 # Set a timeout of 2.5 seconds
//| w.mode = WatchDogMode.RAISE
//| w.feed()"""
//|
//| class WatchDogTimeout(Exception):
//| """Exception raised when the watchdog timer is set to
//| ``WatchDogMode.RAISE`` and expires.
//|
//| Example::
//|
//| import microcontroller
//| import watchdog
//| import time
//|
//| wdt = microcontroller.watchdog
//| wdt.timeout = 5
//|
//| while True:
//| wdt.mode = watchdog.WatchDogMode.RAISE
//| print("Starting loop -- should exit after five seconds")
//| try:
//| while True:
//| time.sleep(10) # Also works with pass
//| except watchdog.WatchDogTimeout as e:
//| print("Watchdog expired")
//| except Exception as e:
//| print("Other exception")
//|
//| print("Exited loop")
//| """
//|
MP_DEFINE_CONST_OBJ_TYPE(
mp_type_WatchDogTimeout,
MP_QSTR_WatchDogTimeout,
MP_TYPE_FLAG_NONE,
make_new, mp_obj_exception_make_new,
attr, mp_obj_exception_attr,
parent, &mp_type_Exception
);
mp_obj_exception_t mp_watchdog_timeout_exception = {
.base.type = &mp_type_WatchDogTimeout,
.args = (mp_obj_tuple_t *)&mp_const_empty_tuple_obj,
.traceback = (mp_obj_traceback_t *)&mp_const_empty_traceback_obj,
};
STATIC const mp_rom_map_elem_t watchdog_module_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_watchdog) },
{ MP_ROM_QSTR(MP_QSTR_WatchDogMode), MP_ROM_PTR(&watchdog_watchdogmode_type) },
{ MP_ROM_QSTR(MP_QSTR_WatchDogTimeout), MP_ROM_PTR(&mp_type_WatchDogTimeout) },
};
STATIC MP_DEFINE_CONST_DICT(watchdog_module_globals, watchdog_module_globals_table);
const mp_obj_module_t watchdog_module = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&watchdog_module_globals,
};
MP_REGISTER_MODULE(MP_QSTR_watchdog, watchdog_module);