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circuitpython/ports/atmel-samd/background.c

101 lines
2.9 KiB

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 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 "background.h"
#include "audio_dma.h"
#include "tick.h"
#include "supervisor/filesystem.h"
#include "supervisor/shared/tick.h"
#include "supervisor/usb.h"
#include "py/runtime.h"
#include "shared-module/network/__init__.h"
#include "supervisor/shared/stack.h"
#ifdef CIRCUITPY_DISPLAYIO
#include "shared-module/displayio/__init__.h"
#endif
volatile uint64_t last_finished_tick = 0;
bool stack_ok_so_far = true;
static bool running_background_tasks = false;
#ifdef MONITOR_BACKGROUND_TASKS
// PB03 is physical pin "SCL" on the Metro M4 express
// so you can't use this code AND an i2c peripheral
// at the same time unless you change this
STATIC void start_background_task(void) {
REG_PORT_DIRSET1 = (1<<3);
REG_PORT_OUTSET1 = (1<<3);
}
STATIC void finish_background_task(void) {
REG_PORT_OUTCLR1 = (1<<3);
}
#else
STATIC void start_background_task(void) {}
STATIC void finish_background_task(void) {}
#endif
void background_tasks_reset(void) {
running_background_tasks = false;
}
void run_background_tasks(void) {
// Don't call ourselves recursively.
if (running_background_tasks) {
return;
}
start_background_task();
assert_heap_ok();
running_background_tasks = true;
#if CIRCUITPY_AUDIOIO || CIRCUITPY_AUDIOBUSIO
audio_dma_background();
#endif
#if CIRCUITPY_DISPLAYIO
displayio_background();
#endif
#if CIRCUITPY_NETWORK
network_module_background();
#endif
filesystem_background();
usb_background();
running_background_tasks = false;
assert_heap_ok();
last_finished_tick = supervisor_ticks_ms64();
finish_background_task();
}
bool background_tasks_ok(void) {
return supervisor_ticks_ms64() - last_finished_tick < 1000;
}