82 lines
2.2 KiB
C
82 lines
2.2 KiB
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2022 Scott Shawcroft for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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#include "supervisor/port.h"
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#include <string.h>
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#include "py/runtime.h"
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#include "lib/tlsf/tlsf.h"
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#ifdef CIRCUITPY_BOOT_BUTTON
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#include "shared-bindings/digitalio/DigitalInOut.h"
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#include "shared-bindings/time/__init__.h"
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#endif
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static tlsf_t heap;
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MP_WEAK void port_wake_main_task(void) {
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}
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MP_WEAK void port_wake_main_task_from_isr(void) {
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}
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MP_WEAK void port_yield(void) {
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}
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MP_WEAK void port_boot_info(void) {
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}
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MP_WEAK void port_heap_init(void) {
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uint32_t *heap_bottom = port_heap_get_bottom();
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uint32_t *heap_top = port_heap_get_top();
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size_t size = (heap_top - heap_bottom) * sizeof(uint32_t);
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heap = tlsf_create_with_pool(heap_bottom, size, size);
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}
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MP_WEAK void *port_malloc(size_t size, bool dma_capable) {
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void *block = tlsf_malloc(heap, size);
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return block;
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}
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MP_WEAK void port_free(void *ptr) {
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tlsf_free(heap, ptr);
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}
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MP_WEAK void *port_realloc(void *ptr, size_t size, bool dma_capable) {
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return tlsf_realloc(heap, ptr, size);
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}
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static bool max_size_walker(void *ptr, size_t size, int used, void *user) {
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size_t *max_size = (size_t *)user;
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if (!used && *max_size < size) {
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*max_size = size;
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}
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return true;
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}
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MP_WEAK size_t port_heap_get_largest_free_size(void) {
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size_t max_size = 0;
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tlsf_walk_pool(tlsf_get_pool(heap), max_size_walker, &max_size);
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// IDF does this. Not sure why.
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return tlsf_fit_size(heap, max_size);
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}
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MP_WEAK bool port_boot_button_pressed(void) {
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#if defined(CIRCUITPY_BOOT_BUTTON)
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// Init/deinit the boot button every time in case it is used for LEDs.
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digitalio_digitalinout_obj_t boot_button;
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common_hal_digitalio_digitalinout_construct(&boot_button, CIRCUITPY_BOOT_BUTTON);
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common_hal_digitalio_digitalinout_switch_to_input(&boot_button, PULL_UP);
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common_hal_time_delay_ms(1);
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bool button_pressed = !common_hal_digitalio_digitalinout_get_value(&boot_button);
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common_hal_digitalio_digitalinout_deinit(&boot_button);
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return button_pressed;
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#else
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return false;
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#endif
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}
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