119 lines
3.7 KiB
C
119 lines
3.7 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 "reload.h"
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#include "py/mphal.h"
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#include "py/mpstate.h"
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#include "supervisor/port.h"
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#include "supervisor/shared/reload.h"
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#include "supervisor/shared/tick.h"
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#include "shared-bindings/supervisor/Runtime.h"
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// True if user has disabled autoreload.
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static bool autoreload_enabled = false;
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// Non-zero if autoreload is temporarily off, due to an AUTORELOAD_SUSPEND_... reason.
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static uint32_t autoreload_suspended = 0;
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volatile uint32_t last_autoreload_trigger = 0;
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void reload_initiate(supervisor_run_reason_t run_reason) {
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supervisor_set_run_reason(run_reason);
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// Raise reload exception, in case code is running.
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MP_STATE_THREAD(mp_pending_exception) = MP_OBJ_FROM_PTR(&MP_STATE_VM(mp_reload_exception));
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#if MICROPY_ENABLE_SCHEDULER
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if (MP_STATE_VM(sched_state) == MP_SCHED_IDLE) {
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MP_STATE_VM(sched_state) = MP_SCHED_PENDING;
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}
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#endif
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port_wake_main_task();
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}
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void autoreload_reset() {
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last_autoreload_trigger = 0;
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}
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void autoreload_enable() {
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autoreload_enabled = true;
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last_autoreload_trigger = 0;
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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(uint32_t suspend_reason_mask) {
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autoreload_suspended |= suspend_reason_mask;
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}
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void autoreload_resume(uint32_t suspend_reason_mask) {
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autoreload_suspended &= ~suspend_reason_mask;
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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_trigger() {
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if (!autoreload_enabled || autoreload_suspended != 0) {
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return;
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}
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bool reload_initiated = autoreload_pending();
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last_autoreload_trigger = supervisor_ticks_ms32();
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// Guard against the rare time that ticks is 0;
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if (last_autoreload_trigger == 0) {
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last_autoreload_trigger += 1;
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}
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// Initiate a reload of the VM immediately. Later code will pause to
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// wait for the autoreload to become ready. Doing the VM exit
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// immediately is clearer for the user.
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if (!reload_initiated) {
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reload_initiate(RUN_REASON_AUTO_RELOAD);
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}
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}
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bool autoreload_ready() {
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if (last_autoreload_trigger == 0 || autoreload_suspended != 0) {
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return false;
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}
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// Wait for autoreload interval before reloading
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uint32_t now = supervisor_ticks_ms32();
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uint32_t diff;
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if (now >= last_autoreload_trigger) {
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diff = now - last_autoreload_trigger;
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} else {
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diff = now + (0xffffffff - last_autoreload_trigger);
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}
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return diff > CIRCUITPY_AUTORELOAD_DELAY_MS;
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}
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bool autoreload_pending(void) {
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return last_autoreload_trigger > 0;
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}
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