154 lines
5.3 KiB
C
154 lines
5.3 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2015 Daniel Campora
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdint.h>
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#include "py/mpconfig.h"
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#include MICROPY_HAL_H
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#include "py/obj.h"
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#include "py/runtime.h"
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#include "inc/hw_types.h"
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#include "inc/hw_gpio.h"
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#include "inc/hw_ints.h"
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#include "inc/hw_memmap.h"
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#include "rom_map.h"
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#include "wdt.h"
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#include "prcm.h"
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#include "utils.h"
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#include "pybwdt.h"
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#include "mpexception.h"
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#include "mperror.h"
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/******************************************************************************
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DECLARE CONSTANTS
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******************************************************************************/
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#define PYBWDT_MILLISECONDS_TO_TICKS(ms) ((80000000 / 1000) * (ms))
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#define PYBWDT_MIN_TIMEOUT_MS (1000)
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/******************************************************************************
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DECLARE TYPES
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******************************************************************************/
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typedef struct {
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bool servers;
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bool servers_sleeping;
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bool simplelink;
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bool running;
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}pybwdt_data_t;
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/******************************************************************************
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DECLARE PRIVATE DATA
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******************************************************************************/
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static pybwdt_data_t pybwdt_data = {.servers = false, .servers_sleeping = false, .simplelink = false, .running = false};
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/******************************************************************************
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DEFINE PUBLIC FUNCTIONS
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******************************************************************************/
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// must be called in main.c just after initializing the hal
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__attribute__ ((section (".boot")))
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void pybwdt_init0 (void) {
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}
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void pybwdt_kick (void) {
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// check that the servers and simplelink are running fine
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if ((pybwdt_data.servers || pybwdt_data.servers_sleeping) && pybwdt_data.simplelink && pybwdt_data.running) {
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pybwdt_data.servers = false;
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pybwdt_data.simplelink = false;
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MAP_WatchdogIntClear(WDT_BASE);
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}
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}
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void pybwdt_srv_alive (void) {
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pybwdt_data.servers = true;
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}
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void pybwdt_srv_sleeping (bool state) {
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pybwdt_data.servers_sleeping = state;
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}
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void pybwdt_sl_alive (void) {
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pybwdt_data.simplelink = true;
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}
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/******************************************************************************/
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// Micro Python bindings
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/// \function wdt_enable('msec')
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/// Enabled the watchdog timer with msec timeout value
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STATIC mp_obj_t pyb_enable_wdt(mp_obj_t self, mp_obj_t msec_in) {
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mp_int_t msec = mp_obj_get_int(msec_in);
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if (msec < PYBWDT_MIN_TIMEOUT_MS) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
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}
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if (pybwdt_data.running) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
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}
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// Enable the WDT peripheral clock
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MAP_PRCMPeripheralClkEnable(PRCM_WDT, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
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// Unlock to be able to configure the registers
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MAP_WatchdogUnlock(WDT_BASE);
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// make the WDT stall when the debugger stops on a breakpoint
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MAP_WatchdogStallEnable (WDT_BASE);
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// set the watchdog timer reload value
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// the WDT trigger a system reset after the second timeout
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// so, divide by the 2 timeout value received
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MAP_WatchdogReloadSet(WDT_BASE, PYBWDT_MILLISECONDS_TO_TICKS(msec / 2));
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// start the timer. Once wdt is started, it cannot be disabled.
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MAP_WatchdogEnable(WDT_BASE);
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pybwdt_data.running = true;
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_enable_wdt_obj, pyb_enable_wdt);
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/// \function wdt_kick()
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/// Kicks the watchdog timer
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STATIC mp_obj_t pyb_kick_wdt(mp_obj_t self) {
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pybwdt_kick ();
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return mp_const_none;
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_kick_wdt_obj, pyb_kick_wdt);
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STATIC const mp_map_elem_t pybwdt_locals_dict_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_enable), (mp_obj_t)&pyb_enable_wdt_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_kick), (mp_obj_t)&pyb_kick_wdt_obj },
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};
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STATIC MP_DEFINE_CONST_DICT(pybwdt_locals_dict, pybwdt_locals_dict_table);
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static const mp_obj_type_t pybwdt_type = {
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{ &mp_type_type },
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.name = MP_QSTR_WDT,
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.locals_dict = (mp_obj_t)&pybwdt_locals_dict,
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};
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const mp_obj_base_t pyb_wdt_obj = {&pybwdt_type};
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