mirror of
https://github.com/espressif/esp-idf.git
synced 2025-11-04 06:11:06 +00:00
59 lines
2.3 KiB
C
59 lines
2.3 KiB
C
/* Finding Partitions Example
|
|
This example code is in the Public Domain (or CC0 licensed, at your option.)
|
|
|
|
Unless required by applicable law or agreed to in writing, this
|
|
software is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
|
|
CONDITIONS OF ANY KIND, either express or implied.
|
|
*/
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include "esp_partition.h"
|
|
#include "esp_log.h"
|
|
|
|
static const char *TAG = "example";
|
|
|
|
void app_main(void)
|
|
{
|
|
/*
|
|
* This example uses the partition table from ../partitions_example.csv. For reference, its contents are as follows:
|
|
*
|
|
* nvs, data, nvs, 0x9000, 0x6000,
|
|
* phy_init, data, phy, 0xf000, 0x1000,
|
|
* factory, app, factory, 0x10000, 1M,
|
|
* storage, data, , , 0x40000,
|
|
*/
|
|
|
|
// Find the partition map in the partition table
|
|
const esp_partition_t *partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_ANY, "storage");
|
|
assert(partition != NULL);
|
|
|
|
static char store_data[] = "ESP-IDF Partition Operations Example (Read, Erase, Write)";
|
|
static char read_data[sizeof(store_data)];
|
|
|
|
// Erase entire partition
|
|
memset(read_data, 0xFF, sizeof(read_data));
|
|
ESP_ERROR_CHECK(esp_partition_erase_range(partition, 0, partition->size));
|
|
|
|
// Write the data, starting from the beginning of the partition
|
|
ESP_ERROR_CHECK(esp_partition_write(partition, 0, store_data, sizeof(store_data)));
|
|
ESP_LOGI(TAG, "Written data: %s", store_data);
|
|
|
|
// Read back the data, checking that read data and written data match
|
|
ESP_ERROR_CHECK(esp_partition_read(partition, 0, read_data, sizeof(read_data)));
|
|
assert(memcmp(store_data, read_data, sizeof(read_data)) == 0);
|
|
ESP_LOGI(TAG, "Read data: %s", read_data);
|
|
|
|
// Erase the area where the data was written. Erase size should be a multiple of SPI_FLASH_SEC_SIZE
|
|
// and also be SPI_FLASH_SEC_SIZE aligned
|
|
ESP_ERROR_CHECK(esp_partition_erase_range(partition, 0, partition->erase_size));
|
|
|
|
// Read back the data (should all now be 0xFF's)
|
|
memset(store_data, 0xFF, sizeof(read_data));
|
|
ESP_ERROR_CHECK(esp_partition_read(partition, 0, read_data, sizeof(read_data)));
|
|
assert(memcmp(store_data, read_data, sizeof(read_data)) == 0);
|
|
|
|
ESP_LOGI(TAG, "Erased data");
|
|
|
|
ESP_LOGI(TAG, "Example end");
|
|
}
|