Copy the image from partition to partition

[aygh4266]

Hello Everyone,

i am trying to copy a binary image located on a data fat partition to an app partition to set the boot from the app partition.
My Idea is to allocate a buffer and read and write the image in loop. Unfortunately is the copied image invalid and i keep getting these log messages:
E (3024) esp_image: image at 0x110000 has invalid magic byte (nothing flashed here?)
E (3034) example_main: Failed to set boot partition to OTA_0: ESP_ERR_OTA_VALIDATE_FAILED

Here is the code:

Code: [Select all] [Expand/Collapse]

1.  void copy_image_to_ota0() {
2.     const esp_partition_t *storage_partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_FAT, "storage");
3.     if (!storage_partition) {
4.         ESP_LOGE(TAG, "Storage partition not found");
5.         return;
6.     }
7.  
8.     const esp_partition_t *ota_0_partition = esp_partition_find_first(ESP_PARTITION_TYPE_APP, ESP_PARTITION_SUBTYPE_APP_OTA_0, NULL);
9.     if (!ota_0_partition) {
10.         ESP_LOGE(TAG, "OTA_0 partition not found");
11.         return;
12.     }
13.  
14.     if (storage_partition->size > ota_0_partition->size) {
15.         ESP_LOGE(TAG, "Storage partition is larger than OTA_0 partition");
16.         return;
17.     }
18.  
19.     ESP_LOGI(TAG, "Copying image from storage to OTA_0 partition");
20.     const int BUFFER_SIZE = 4096;
21.     void *buffer = malloc(BUFFER_SIZE);
22.     if (!buffer) {
23.         ESP_LOGE(TAG, "Failed to allocate memory for buffer");
24.         return;
25.     }
26.  
27.     size_t offset = 0;
28.     esp_err_t err;
29.     while (offset < storage_partition->size) {
30.         size_t bytes_to_copy = MIN(BUFFER_SIZE, storage_partition->size - offset);
31.        
32.         err = esp_partition_read(storage_partition, offset, buffer, bytes_to_copy);
33.         if (err != ESP_OK) {
34.             ESP_LOGE(TAG, "Failed to read from storage partition at offset 0x%08x: %s", offset, esp_err_to_name(err));
35.             free(buffer);
36.             return;
37.         }
38.  
39.         err = esp_partition_write(ota_0_partition, offset, buffer, bytes_to_copy);
40.         if (err != ESP_OK) {
41.             ESP_LOGE(TAG, "Failed to write to OTA_0 partition at offset 0x%08x: %s", offset, esp_err_to_name(err));
42.             free(buffer);
43.             return;
44.         }
45.  
46.         ESP_LOGD(TAG, "Copied %d bytes from offset 0x%08x", bytes_to_copy, offset);
47.         offset += bytes_to_copy;
48.     }
49.  
50.     ESP_LOGI(TAG, "Image copied successfully to OTA_0 partition");
51.     free(buffer);
52. }

GeSHi © Codebox Plus Extension

[liaifat85]

You can try this edited version of your code:

Code: Select all

#include "esp_partition.h"
#include "esp_log.h"
#include "esp_ota_ops.h"
#include <stdlib.h>

#define TAG "example_main"

void copy_image_to_ota0() {
    const esp_partition_t *storage_partition = esp_partition_find_first(ESP_PARTITION_TYPE_DATA, ESP_PARTITION_SUBTYPE_DATA_FAT, "storage");
    if (!storage_partition) {
        ESP_LOGE(TAG, "Storage partition not found");
        return;
    }

    const esp_partition_t *ota_0_partition = esp_partition_find_first(ESP_PARTITION_TYPE_APP, ESP_PARTITION_SUBTYPE_APP_OTA_0, NULL);
    if (!ota_0_partition) {
        ESP_LOGE(TAG, "OTA_0 partition not found");
        return;
    }

    if (storage_partition->size > ota_0_partition->size) {
        ESP_LOGE(TAG, "Storage partition is larger than OTA_0 partition");
        return;
    }

    ESP_LOGI(TAG, "Copying image from storage to OTA_0 partition");
    const int BUFFER_SIZE = 4096;
    void *buffer = malloc(BUFFER_SIZE);
    if (!buffer) {
        ESP_LOGE(TAG, "Failed to allocate memory for buffer");
        return;
    }

    size_t offset = 0

[MicroController]

a binary image located on a data fat partition

Is there a FAT filesystem on this partition?
How do you get the image into this storage partition?

[aygh4266]

a binary image located on a data fat partition

Is there a FAT filesystem on this partition?
How do you get the image into this storage partition?

Yes, there is a FAT Parition in the partition table.csv
By Configuring the esp32s3 to act like Mass Storage device. So I can send the binary image direct from my PC or smartphone using USB OTG.

[MicroController]

You can't copy a FAT filesystem into an OTA partition and expect the FAT to be a valid firmware image.

[ok-home]

Hi,
why can't the OTA API
esp_ota_begin/esp_ota_write/esp_ota_end
be used with fread ?