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