01dd7804b8
This is to keep the top-level directory clean, to make it clear what is core and what is a port, and to allow the repository to grow with new ports in a sustainable way.
107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2016 Damien P. George
|
|
*
|
|
* 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 <stdio.h>
|
|
|
|
#include "py/runtime.h"
|
|
#include "wdt.h"
|
|
|
|
typedef struct _pyb_wdt_obj_t {
|
|
mp_obj_base_t base;
|
|
} pyb_wdt_obj_t;
|
|
|
|
STATIC pyb_wdt_obj_t pyb_wdt = {{&pyb_wdt_type}};
|
|
|
|
STATIC mp_obj_t pyb_wdt_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *all_args) {
|
|
// parse arguments
|
|
enum { ARG_id, ARG_timeout };
|
|
static const mp_arg_t allowed_args[] = {
|
|
{ MP_QSTR_id, MP_ARG_INT, {.u_int = 0} },
|
|
{ MP_QSTR_timeout, MP_ARG_INT, {.u_int = 5000} },
|
|
};
|
|
mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
|
|
mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
|
|
|
|
mp_int_t id = args[ARG_id].u_int;
|
|
if (id != 0) {
|
|
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_ValueError, "WDT(%d) doesn't exist", id));
|
|
}
|
|
|
|
// timeout is in milliseconds
|
|
mp_int_t timeout = args[ARG_timeout].u_int;
|
|
|
|
// compute prescaler
|
|
uint32_t prescaler;
|
|
for (prescaler = 0; prescaler < 6 && timeout >= 512; ++prescaler, timeout /= 2) {
|
|
}
|
|
|
|
// convert milliseconds to ticks
|
|
timeout *= 8; // 32kHz / 4 = 8 ticks per millisecond (approx)
|
|
if (timeout <= 0) {
|
|
mp_raise_ValueError("WDT timeout too short");
|
|
} else if (timeout > 0xfff) {
|
|
mp_raise_ValueError("WDT timeout too long");
|
|
}
|
|
timeout -= 1;
|
|
|
|
// set the reload register
|
|
while (IWDG->SR & 2) {
|
|
}
|
|
IWDG->KR = 0x5555;
|
|
IWDG->RLR = timeout;
|
|
|
|
// set the prescaler
|
|
while (IWDG->SR & 1) {
|
|
}
|
|
IWDG->KR = 0x5555;
|
|
IWDG->PR = prescaler;
|
|
|
|
// start the watch dog
|
|
IWDG->KR = 0xcccc;
|
|
|
|
return (mp_obj_t)&pyb_wdt;
|
|
}
|
|
|
|
STATIC mp_obj_t pyb_wdt_feed(mp_obj_t self_in) {
|
|
(void)self_in;
|
|
IWDG->KR = 0xaaaa;
|
|
return mp_const_none;
|
|
}
|
|
STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_wdt_feed_obj, pyb_wdt_feed);
|
|
|
|
STATIC const mp_rom_map_elem_t pyb_wdt_locals_dict_table[] = {
|
|
{ MP_ROM_QSTR(MP_QSTR_feed), MP_ROM_PTR(&pyb_wdt_feed_obj) },
|
|
};
|
|
|
|
STATIC MP_DEFINE_CONST_DICT(pyb_wdt_locals_dict, pyb_wdt_locals_dict_table);
|
|
|
|
const mp_obj_type_t pyb_wdt_type = {
|
|
{ &mp_type_type },
|
|
.name = MP_QSTR_WDT,
|
|
.make_new = pyb_wdt_make_new,
|
|
.locals_dict = (mp_obj_dict_t*)&pyb_wdt_locals_dict,
|
|
};
|