circuitpython/ports/stm/common-hal/alarm/SleepMemory.c

83 lines
2.7 KiB
C

/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2021 Lucian Copeland 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 <string.h>
#include "py/runtime.h"
#include "common-hal/alarm/SleepMemory.h"
#include STM32_HAL_H
#if CPY_STM32L4
#define __HAL_RCC_BKPSRAM_CLK_ENABLE()
#define STM_BKPSRAM_SIZE 0
#define STM_BKPSRAM_START 0
#define HAL_PWREx_EnableBkUpReg()
// backup RAM disabled for now. Will have the backup region at the top of SRAM3 which is retained.
#else
#define STM_BKPSRAM_SIZE 0x1000
#define STM_BKPSRAM_START BKPSRAM_BASE
#endif
STATIC bool initialized = false;
STATIC void lazy_init(void) {
if (!initialized) {
__HAL_RCC_BKPSRAM_CLK_ENABLE();
HAL_PWREx_EnableBkUpReg();
HAL_PWR_EnableBkUpAccess();
initialized = true;
}
}
void alarm_sleep_memory_reset(void) {
}
uint32_t common_hal_alarm_sleep_memory_get_length(alarm_sleep_memory_obj_t *self) {
lazy_init();
return STM_BKPSRAM_SIZE;
}
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) {
if (start_index + len > STM_BKPSRAM_SIZE) {
return false;
}
lazy_init();
memcpy((uint8_t *)(STM_BKPSRAM_START + start_index), values, len);
return true;
}
void common_hal_alarm_sleep_memory_get_bytes(alarm_sleep_memory_obj_t *self, uint32_t start_index, uint8_t *values, uint32_t len) {
if (start_index + len > STM_BKPSRAM_SIZE) {
return;
}
lazy_init();
memcpy(values, (uint8_t *)(STM_BKPSRAM_START + start_index), len);
return;
}