89 lines
3.5 KiB
C
89 lines
3.5 KiB
C
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/*
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* This file is part of the Micro Python 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 "asf/sam0/drivers/nvm/nvm.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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uint32_t total_written = 0;
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for (uint32_t i = 0; i < self->len / NVMCTRL_ROW_SIZE; i++) {
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uint32_t row_start = NVMCTRL_ROW_SIZE * i;
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if (row_start + NVMCTRL_ROW_SIZE < start_index || start_index + len < row_start) {
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continue;
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}
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uint8_t temp_row[NVMCTRL_ROW_SIZE];
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memcpy(temp_row,
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self->start_address + row_start,
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NVMCTRL_ROW_SIZE);
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enum status_code error_code;
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do {
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error_code = nvm_erase_row((uint32_t) self->start_address + row_start);
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} while (error_code == STATUS_BUSY);
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if (error_code != STATUS_OK) {
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return false;
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}
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uint32_t data_start = 0;
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if (start_index > row_start) {
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data_start = start_index - row_start;
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}
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uint32_t data_len = len;
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uint32_t data_remaining = data_len - total_written;
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uint32_t row_remaining = NVMCTRL_ROW_SIZE - data_start;
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if (data_remaining > row_remaining) {
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data_len = row_remaining;
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}
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memcpy(temp_row + data_start,
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values + total_written,
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data_len);
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for (int page = 0; page < NVMCTRL_ROW_SIZE / NVMCTRL_PAGE_SIZE; page++) {
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do {
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error_code = nvm_write_buffer((uint32_t) self->start_address + row_start + page * NVMCTRL_PAGE_SIZE,
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temp_row + page * NVMCTRL_PAGE_SIZE,
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NVMCTRL_PAGE_SIZE);
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} while (error_code == STATUS_BUSY);
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if (error_code != STATUS_OK) {
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return false;
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}
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}
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}
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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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