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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2017 Scott Shawcroft 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 "common-hal/nvm/ByteArray.h"
#include "asf/sam0/drivers/nvm/nvm.h"
#include <stdint.h>
#include <string.h>
uint32_t common_hal_nvm_bytearray_get_length(nvm_bytearray_obj_t *self) {
return self->len;
}
bool common_hal_nvm_bytearray_set_bytes(nvm_bytearray_obj_t *self,
uint32_t start_index, uint8_t* values, uint32_t len) {
uint32_t total_written = 0;
for (uint32_t i = 0; i < self->len / NVMCTRL_ROW_SIZE; i++) {
uint32_t row_start = NVMCTRL_ROW_SIZE * i;
if (row_start + NVMCTRL_ROW_SIZE < start_index || start_index + len < row_start) {
continue;
}
uint8_t temp_row[NVMCTRL_ROW_SIZE];
memcpy(temp_row,
self->start_address + row_start,
NVMCTRL_ROW_SIZE);
enum status_code error_code;
do {
error_code = nvm_erase_row((uint32_t) self->start_address + row_start);
} while (error_code == STATUS_BUSY);
if (error_code != STATUS_OK) {
return false;
}
uint32_t data_start = 0;
if (start_index > row_start) {
data_start = start_index - row_start;
}
uint32_t data_len = len;
uint32_t data_remaining = data_len - total_written;
uint32_t row_remaining = NVMCTRL_ROW_SIZE - data_start;
if (data_remaining > row_remaining) {
data_len = row_remaining;
}
memcpy(temp_row + data_start,
values + total_written,
data_len);
for (int page = 0; page < NVMCTRL_ROW_SIZE / NVMCTRL_PAGE_SIZE; page++) {
do {
error_code = nvm_write_buffer((uint32_t) self->start_address + row_start + page * NVMCTRL_PAGE_SIZE,
temp_row + page * NVMCTRL_PAGE_SIZE,
NVMCTRL_PAGE_SIZE);
} while (error_code == STATUS_BUSY);
if (error_code != STATUS_OK) {
return false;
}
}
}
return true;
}
// NVM memory is memory mapped so reading it is easy.
void common_hal_nvm_bytearray_get_bytes(nvm_bytearray_obj_t *self,
uint32_t start_index, uint32_t len, uint8_t* values) {
memcpy(values, self->start_address + start_index, len);
}
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