74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
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/*
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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) 2017 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 "common-hal/nvm/ByteArray.h"
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#include "stm32f4xx_hal.h"
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#include "supervisor/shared/stack.h"
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#include <stdint.h>
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#include <string.h>
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uint32_t common_hal_nvm_bytearray_get_length(nvm_bytearray_obj_t *self) {
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return self->len;
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}
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bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t *self,
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uint32_t start_index, uint8_t* values, uint32_t len) {
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// Copy flash to buffer
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uint8_t buffer[self->len];
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memcpy(buffer, self->start_address, self->len);
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// Set bytes in buffer
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memmove(buffer + start_index, values, len);
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// Erase flash sector
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HAL_FLASH_Unlock();
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__HAL_FLASH_CLEAR_FLAG(FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGSERR );
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FLASH_Erase_Sector(CIRCUITPY_INTERNAL_NVM_SECTOR, VOLTAGE_RANGE_3);
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// Write bytes to flash
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uint32_t i;
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uint32_t flash_addr = (uint32_t)self->start_address;
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for (i = 0; i < self->len; i++, flash_addr++) {
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if (HAL_FLASH_Program(FLASH_TYPEPROGRAM_BYTE, flash_addr, buffer[i]) != HAL_OK) {
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HAL_FLASH_Lock();
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return false;
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}
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}
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// Finish up
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HAL_FLASH_Lock();
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return true;
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}
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// NVM memory is memory mapped so reading it is easy.
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void common_hal_nvm_bytearray_get_bytes(nvm_bytearray_obj_t *self,
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uint32_t start_index, uint32_t len, uint8_t* values) {
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memcpy(values, self->start_address + start_index, len);
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}
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