95 lines
2.8 KiB
C
95 lines
2.8 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2016 Scott Shawcroft for Adafruit Industries
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "autoreload.h"
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#include "py/mphal.h"
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#include "py/reload.h"
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#include "supervisor/shared/tick.h"
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static volatile uint32_t autoreload_delay_ms = 0;
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static bool autoreload_enabled = false;
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static bool autoreload_suspended = false;
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volatile bool reload_requested = false;
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inline void autoreload_tick() {
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if (autoreload_delay_ms == 0) {
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return;
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}
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if (autoreload_delay_ms == 1 && autoreload_enabled &&
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!autoreload_suspended && !reload_requested) {
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mp_raise_reload_exception();
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reload_requested = true;
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supervisor_disable_tick();
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}
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autoreload_delay_ms--;
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}
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void autoreload_enable() {
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autoreload_enabled = true;
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reload_requested = false;
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}
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void autoreload_disable() {
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autoreload_enabled = false;
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}
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void autoreload_suspend() {
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autoreload_suspended = true;
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}
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void autoreload_resume() {
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autoreload_suspended = false;
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}
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inline bool autoreload_is_enabled() {
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return autoreload_enabled;
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}
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void autoreload_start() {
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// Enable ticks if we haven't been tracking an autoreload delay. We check
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// our current state so that we only turn ticks on once. Multiple starts
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// can occur before we reload and then turn ticks off.
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if (autoreload_delay_ms == 0) {
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supervisor_enable_tick();
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}
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autoreload_delay_ms = CIRCUITPY_AUTORELOAD_DELAY_MS;
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}
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void autoreload_stop() {
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autoreload_delay_ms = 0;
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reload_requested = false;
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}
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void autoreload_now() {
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if (!autoreload_enabled || autoreload_suspended || reload_requested) {
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return;
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}
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mp_raise_reload_exception();
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reload_requested = true;
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}
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