77 lines
2.7 KiB
C
77 lines
2.7 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) 2021 Lucian Copeland 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 <string.h>
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#include "py/runtime.h"
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#include "common-hal/alarm/SleepMemory.h"
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#include "shared-bindings/alarm/SleepMemory.h"
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__attribute__((section(".uninitialized"))) static uint8_t _sleepmem[SLEEP_MEMORY_LENGTH];
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__attribute__((section(".uninitialized"))) static uint32_t _sleepmem_magicnum;
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#define SLEEP_MEMORY_DATA_GUARD 0xad0000af
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#define SLEEP_MEMORY_DATA_GUARD_MASK 0xff0000ff
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static int is_sleep_memory_valid(void) {
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if ((_sleepmem_magicnum & SLEEP_MEMORY_DATA_GUARD_MASK)
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== SLEEP_MEMORY_DATA_GUARD) {
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return 1;
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}
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return 0;
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}
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static void initialize_sleep_memory(void) {
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memset((uint8_t *)_sleepmem, 0, SLEEP_MEMORY_LENGTH);
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_sleepmem_magicnum = SLEEP_MEMORY_DATA_GUARD;
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}
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void alarm_sleep_memory_reset(void) {
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if (!is_sleep_memory_valid()) {
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initialize_sleep_memory();
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}
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}
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uint32_t common_hal_alarm_sleep_memory_get_length(alarm_sleep_memory_obj_t *self) {
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return sizeof(_sleepmem);
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}
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bool common_hal_alarm_sleep_memory_set_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, const uint8_t *values, uint32_t len) {
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if (start_index + len > sizeof(_sleepmem)) {
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return false;
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}
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memcpy((uint8_t *)(_sleepmem + start_index), values, len);
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return true;
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}
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void common_hal_alarm_sleep_memory_get_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, uint8_t *values, uint32_t len) {
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if (start_index + len > sizeof(_sleepmem)) {
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return;
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}
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memcpy(values, (uint8_t *)(_sleepmem + start_index), len);
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}
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