machine_wdt.c

/*
 * This file is part of the MicroPython project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2021 "Krzysztof Adamski" <k@japko.eu>
 *
 * 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.
 */

// std includes
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <time.h>


// micropython includes
#include "py/nlr.h"
#include "py/obj.h"
#include "py/runtime.h"
#include "py/mphal.h"
#include "py/mperrno.h"
#include "shared/timeutils/timeutils.h"
#include "py/misc.h"


// MTB includes
#include "cyhal.h"


// port-specific includes
#include "modmachine.h"

cyhal_wdt_t psoc6_wdt;

typedef struct _machine_wdt_obj_t {
    mp_obj_base_t base;
} machine_wdt_obj_t;

// singleton WDT object
static const machine_wdt_obj_t machine_wdt_obj = {{&machine_wdt_type}};

static machine_wdt_obj_t *mp_machine_wdt_make_new_instance(mp_int_t id, mp_int_t timeout_ms) {
    if (id != 0) {
        mp_raise_msg_varg(&mp_type_ValueError, MP_ERROR_TEXT("WDT(%d) doesn't exist"), id);
    }

    if (timeout_ms <= 0) {
        mp_raise_ValueError(MP_ERROR_TEXT("WDT timeout too low"));
    } else if (timeout_ms > cyhal_wdt_get_max_timeout_ms()) {
        mp_raise_ValueError(MP_ERROR_TEXT("WDT timeout too high"));
    }

    cy_rslt_t result = cyhal_wdt_init(&psoc6_wdt, timeout_ms);
    if (CY_RSLT_SUCCESS != result) {
        mp_raise_ValueError(MP_ERROR_TEXT("cyhal_wdt_init failed !"));
    }

    return (machine_wdt_obj_t *)&machine_wdt_obj;
}

static void mp_machine_wdt_feed(machine_wdt_obj_t *self) {
    cyhal_wdt_kick(&psoc6_wdt);
}

void mod_wdt_deinit() {
    cyhal_wdt_stop(&psoc6_wdt);
    cyhal_wdt_free(&psoc6_wdt);
}