circuitpython/atmel-samd/autoreset.c

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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
*
* 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 "autoreset.h"
#include "asf/sam0/drivers/tc/tc_interrupt.h"
#include "lib/utils/interrupt_char.h"
#include "py/mphal.h"
volatile uint32_t autoreset_delay_ms = 0;
bool autoreset_enabled = false;
volatile bool reset_next_character = false;
inline void autoreset_tick() {
if (autoreset_delay_ms == 0) {
return;
}
if (autoreset_delay_ms == 1 && autoreset_enabled && !reset_next_character) {
mp_keyboard_interrupt();
reset_next_character = true;
}
autoreset_delay_ms--;
}
void autoreset_enable() {
autoreset_enabled = true;
reset_next_character = false;
}
void autoreset_disable() {
autoreset_enabled = false;
}
void autoreset_start() {
autoreset_delay_ms = AUTORESET_DELAY_MS;
}
void autoreset_stop() {
autoreset_delay_ms = 0;
}