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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2015 Daniel Campora
*
* 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 <stdint.h>
#include "py/mpconfig.h"
#include MICROPY_HAL_H
#include "py/obj.h"
#include "py/runtime.h"
#include "inc/hw_types.h"
#include "inc/hw_gpio.h"
#include "inc/hw_ints.h"
#include "inc/hw_memmap.h"
#include "rom_map.h"
#include "wdt.h"
#include "prcm.h"
#include "utils.h"
#include "pybwdt.h"
#include "mpexception.h"
#include "mperror.h"
/******************************************************************************
DECLARE CONSTANTS
******************************************************************************/
#define PYBWDT_MILLISECONDS_TO_TICKS(ms) ((80000000 / 1000) * (ms))
#define PYBWDT_MIN_TIMEOUT_MS (500)
/******************************************************************************
DECLARE TYPES
******************************************************************************/
typedef struct {
bool servers;
bool simplelink;
bool running;
}pybwdt_data_t;
/******************************************************************************
DECLARE PRIVATE DATA
******************************************************************************/
static pybwdt_data_t pybwdt_data;
/******************************************************************************
DEFINE PUBLIC FUNCTIONS
******************************************************************************/
// must be called in main.c just after initializing the hal
__attribute__ ((section (".boot")))
void pybwdt_init0 (void) {
pybwdt_data.running = false;
}
void pybwdt_kick (void) {
// check that the servers and simplelink are running fine
if (pybwdt_data.servers && pybwdt_data.simplelink && pybwdt_data.running) {
pybwdt_data.servers = false;
pybwdt_data.simplelink = false;
MAP_WatchdogIntClear(WDT_BASE);
}
}
void pybwdt_srv_alive (void) {
pybwdt_data.servers = true;
}
void pybwdt_sl_alive (void) {
pybwdt_data.simplelink = true;
}
/******************************************************************************/
// Micro Python bindings
/// \function wdt_enable('msec')
/// Enabled the watchdog timer with msec timeout value
STATIC mp_obj_t pyb_enable_wdt(mp_obj_t self, mp_obj_t msec_in) {
mp_int_t msec = mp_obj_get_int(msec_in);
if (msec < PYBWDT_MIN_TIMEOUT_MS) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, mpexception_value_invalid_arguments));
}
if (pybwdt_data.running) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_OSError, mpexception_os_request_not_possible));
}
// Enable the WDT peripheral clock
MAP_PRCMPeripheralClkEnable(PRCM_WDT, PRCM_RUN_MODE_CLK | PRCM_SLP_MODE_CLK);
// Unlock to be able to configure the registers
MAP_WatchdogUnlock(WDT_BASE);
// make the WDT stall when the debugger stops on a breakpoint
MAP_WatchdogStallEnable (WDT_BASE);
// set the watchdog timer reload value
// the WDT trigger a system reset after the second timeout
// so, divide by the 2 timeout value received
MAP_WatchdogReloadSet(WDT_BASE, PYBWDT_MILLISECONDS_TO_TICKS(msec / 2));
// start the timer. Once wdt is started, it cannot be disabled.
MAP_WatchdogEnable(WDT_BASE);
pybwdt_data.running = true;
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_2(pyb_enable_wdt_obj, pyb_enable_wdt);
/// \function wdt_kick()
/// Kicks the watchdog timer
STATIC mp_obj_t pyb_kick_wdt(mp_obj_t self) {
pybwdt_kick ();
return mp_const_none;
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_kick_wdt_obj, pyb_kick_wdt);
STATIC const mp_map_elem_t pybwdt_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_enable), (mp_obj_t)&pyb_enable_wdt_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_kick), (mp_obj_t)&pyb_kick_wdt_obj },
};
STATIC MP_DEFINE_CONST_DICT(pybwdt_locals_dict, pybwdt_locals_dict_table);
static const mp_obj_type_t pybwdt_type = {
{ &mp_type_type },
.name = MP_QSTR_WDT,
.locals_dict = (mp_obj_t)&pybwdt_locals_dict,
};
const mp_obj_base_t pyb_wdt_obj = {&pybwdt_type};
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