105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
/*
|
|
* This file is part of the MicroPython project, http://micropython.org/
|
|
*
|
|
* The MIT License (MIT)
|
|
*
|
|
* Copyright (c) 2016 Daniel Thompson
|
|
*
|
|
* 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 "py/mphal.h"
|
|
|
|
#if MICROPY_PY_MACHINE_WDT
|
|
|
|
#include "wdt.h"
|
|
#include "nrf_wdt.h"
|
|
|
|
bool wdt_starve;
|
|
|
|
#if MICROPY_HW_HAS_WDT_BUTTON
|
|
static void button_init(void)
|
|
{
|
|
nrf_gpio_cfg_sense_input(
|
|
MICROPY_HW_WDT_BUTTON,
|
|
MICROPY_HW_WDT_BUTTON_PULL < 0 ? NRF_GPIO_PIN_PULLDOWN :
|
|
MICROPY_HW_WDT_BUTTON_PULL > 0 ? NRF_GPIO_PIN_PULLUP :
|
|
NRF_GPIO_PIN_NOPULL,
|
|
NRF_GPIO_PIN_NOSENSE);
|
|
|
|
#if MICROPY_HW_WDT_BUTTON_ENABLE
|
|
nrf_gpio_cfg_output(MICROPY_HW_WDT_BUTTON_ENABLE);
|
|
nrf_gpio_pin_write(MICROPY_HW_WDT_BUTTON_ENABLE,
|
|
MICROPY_HW_WDT_BUTTON_ACTIVE);
|
|
#endif
|
|
}
|
|
|
|
static bool button_pressed(void)
|
|
{
|
|
return nrf_gpio_pin_read(MICROPY_HW_WDT_BUTTON) == MICROPY_HW_WDT_BUTTON_ACTIVE;
|
|
}
|
|
#endif
|
|
|
|
void wdt_init(void)
|
|
{
|
|
if (!nrf_wdt_started()) {
|
|
// 1 => keep running during a sleep, stop during SWD debug
|
|
nrf_wdt_behaviour_set(1);
|
|
|
|
// timeout after 5 seconds
|
|
nrf_wdt_reload_value_set(5 * 32768);
|
|
|
|
// enable the 0th channel
|
|
nrf_wdt_reload_request_enable(NRF_WDT_RR0);
|
|
|
|
// set it running
|
|
nrf_wdt_task_trigger(NRF_WDT_TASK_START);
|
|
|
|
#if MICROPY_HW_HAS_WDT_BUTTON
|
|
// if there was no bootloader to configure the WDT then it
|
|
// probably didn't setup the pins for the button either
|
|
button_init();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
void wdt_feed(bool isr)
|
|
{
|
|
/*
|
|
* A WDT button allows us to feed the dog from somewhere that would
|
|
* normally be "silly", such as a periodic timer interrupt. By providing
|
|
* the user direct control over feeding the dog we are, in effect,
|
|
* implementing a (reasonably robust) long-press reset button.
|
|
*/
|
|
#if MICROPY_HW_HAS_WDT_BUTTON
|
|
if (button_pressed())
|
|
return;
|
|
#else
|
|
if (isr)
|
|
return;
|
|
#endif
|
|
|
|
if (wdt_starve)
|
|
return;
|
|
|
|
nrf_wdt_reload_request_set(0);
|
|
}
|
|
|
|
#endif // MICROPY_PY_MACHINE_WDT
|