circuitpython/ports/espressif/common-hal/nvm/ByteArray.c

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/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2020 microDev
*
* 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>
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#include "common-hal/nvm/ByteArray.h"
#include "shared-bindings/nvm/ByteArray.h"
#include "bindings/espidf/__init__.h"
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#include "py/runtime.h"
#include "py/gc.h"
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#include "nvs_flash.h"
uint32_t common_hal_nvm_bytearray_get_length(const nvm_bytearray_obj_t *self) {
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return self->len;
}
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static void get_nvs_handle(nvs_handle_t *nvs_handle) {
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// Initialize NVS
esp_err_t err = nvs_flash_init();
if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {
// NVS partition was truncated and needs to be erased
// Retry nvs_flash_init
ESP_ERROR_CHECK(nvs_flash_erase());
err = nvs_flash_init();
}
ESP_ERROR_CHECK(err);
// Open NVS handle
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if (nvs_open("CPY", NVS_READWRITE, nvs_handle) != ESP_OK) {
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mp_raise_RuntimeError(translate("NVS Error"));
}
}
// Get a copy of the nvm data, or an array initialized to all 0 bytes if it is not present
static esp_err_t get_bytes(nvs_handle_t handle, uint8_t **buf_out) {
size_t size;
void *buf;
esp_err_t result = nvs_get_blob(handle, "data", NULL, &size);
if (result == ESP_ERR_NVS_NOT_FOUND) {
size = CIRCUITPY_INTERNAL_NVM_SIZE;
} else if (result != ESP_OK) {
*buf_out = NULL;
return result;
}
buf = gc_alloc(size, 0, false); // this SHOULD be the same as
if (result == ESP_OK) {
result = nvs_get_blob(handle, "data", buf, &size);
} else {
result = ESP_OK;
}
*buf_out = buf;
return result;
}
bool common_hal_nvm_bytearray_set_bytes(const nvm_bytearray_obj_t *self,
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uint32_t start_index, uint8_t *values, uint32_t len) {
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// start nvs
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nvs_handle_t handle;
get_nvs_handle(&handle);
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// get from flash
uint8_t *buf = NULL;
esp_err_t result = get_bytes(handle, &buf);
if (result != ESP_OK) {
gc_free(buf);
nvs_close(handle);
raise_esp_error(result);
}
// erase old data, including 6.3.x incompatible data
result = nvs_erase_all(handle);
if (result != ESP_OK) {
gc_free(buf);
nvs_close(handle);
raise_esp_error(result);
}
// make our modification
memcpy(buf + start_index, values, len);
result = nvs_set_blob(handle, "data", buf, CIRCUITPY_INTERNAL_NVM_SIZE);
if (result != ESP_OK) {
gc_free(buf);
nvs_close(handle);
raise_esp_error(result);
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}
result = nvs_commit(handle);
if (result != ESP_OK) {
gc_free(buf);
nvs_close(handle);
raise_esp_error(result);
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}
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// close nvs
gc_free(buf);
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nvs_close(handle);
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return true;
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}
void common_hal_nvm_bytearray_get_bytes(const nvm_bytearray_obj_t *self,
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uint32_t start_index, uint32_t len, uint8_t *values) {
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// start nvs
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nvs_handle_t handle;
get_nvs_handle(&handle);
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// get from flash
uint8_t *buf;
esp_err_t result = get_bytes(handle, &buf);
if (result != ESP_OK) {
gc_free(buf);
nvs_close(handle);
raise_esp_error(result);
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}
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// copy the subset of data requested
memcpy(values, buf + start_index, len);
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// close nvs
gc_free(buf);
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nvs_close(handle);
}