ESP32 Forum

Posted: **Mon Sep 16, 2019 6:52 pm**

Hi,

I want to keep some sensitive data on different spiffs partition, so I can erase/reflash other partitions freele.

So, I have some questions about this.

1) How should partitions table looks like?

Right now I'm thinking about this format, but not sure about fields "Name" , "SubType" .

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# Name,   Type, SubType, Offset,  Size, Flags
nvs,      data, nvs,     0x9000,   0x6000,
phy_init, data, phy,     0xf000,   0x1000,
factory,  app,  factory, 0x10000,  0x170000,
storage1,  data, spiffs,  0x180000, 0x270000,
storage2,  data, spiffs,  0x3F0000, 0x10000,

2) Does names in partition table realated somehow to actual partition name?

From IDF example I see this:

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    esp_vfs_spiffs_conf_t conf = {
      .base_path = "/spiffs",
      .partition_label = NULL,
      .max_files = 5,
      .format_if_mount_failed = true
    };
    
    // Use settings defined above to initialize and mount SPIFFS filesystem.
    // Note: esp_vfs_spiffs_register is an all-in-one convenience function.
    esp_err_t ret = esp_vfs_spiffs_register(&conf);

Does it neccessary to keep same names at base_path and Name/Subtype ?

3) Can I use different file prefixes to operate with different partitions?
Right now I'm operatin with files something like that:

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file = fopen("/spiffs/list.txt", "wb");

For example, I want open file "list.txt" located on other partition.

Can I just do this:

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file = fopen("/other_partition/list.txt", "wb");

Thanks in advance

Posted: **Mon Oct 07, 2019 5:28 pm**

1) you got it. Just give a different name to your partitions.
2) The name of the partition comes from the partition table. However, the file system prefix (base_path) is not related (see below).
3) you can use different file system prefix for each partition and the prefix can be anything (does not have to match partition name).

You'd call esp_vfs_spiffs_register() with a different configuration for each partition you want to use.

Code: Select all

    esp_vfs_spiffs_conf_t conf1 = {
      .base_path = "/spiffs",
      .partition_label = "storage1",
      .max_files = 5,
      .format_if_mount_failed = true
    };
    esp_vfs_spiffs_conf_t conf2 = {
      .base_path = "/other_partition",
      .partition_label = "storage2",
      .max_files = 5,
      .format_if_mount_failed = true
    };

ESP32 Forum

SPIFFS: how to create more then one partitions?

SPIFFS: how to create more then one partitions?

Re: SPIFFS: how to create more then one partitions?