To answer myself: SPIFFS cannot do this. Should have looked up this before posting. From the SPIFFS wiki: Seeking in a file As opposed to posix, spiffs cannot create gaps in files. Sorry. You can seek around, but seeking beyond file end will promptly put the offset at the file end. Sorry for having ...

I tried to enlarge an existing file by positioning the file pointer beyond the end of the file and writing a character there, expecting to have filled the characters in between w/ zeros. The code below works okay under Linux, but fseek fails with errno 5 (EIO) when tried on SPIFFS. Is this a known l...

Hi all, somehow I cannot find this "announcement for ESP32 rev 2". As I noticed these days that I can communicate with 20kbaud CAN bus only from rev 2 upwards I am really interested to get my hands on rev 2. BTW: I cannot find any trace of a CAN register description in the technical reference materi...

To follow up myself: the mentioned change went in with the commit by "projectgus" on 16 Sep. See the diff for esp_image_format.c, lines 217-222 (OLD) / 227-231 (NEW) and 224-232 (OLD) / 233-244 (NEW): "if (data->image.hash_appended) {...}" has been moved into the else branch by this.

I compared the code of the current esp_image_format.c with an older version (pulled from git on October, 7th). And the older version has the copying of the hash to the image_digest (the block "if (data->image.hash_appended)" ) AFTER the "if (verify_sha) { ... } else { ...}" block, while the current ...

To continue my test: "Last thing I checked is an error-free return from a call to err = verify_simple_hash(sha_handle, data);" --> this function even debug-prints a non-null hash: D (1794) boot: Calculated hash: 3954b6030aa3f19e7aeb7acbd93ed974e4ef5e8d5865f366e101047a079649fa But it does not make it...

Hi Angus, I am using ESP-IDF v4.1-dev-815-ga45e99853. As you can see from my code snippet, the return value is ESP_OK. I looked up the definition of esp_partition_get_sha256(), which calls bootloader_common_get_sha256_of_partition(). There it returns from a call to esp_image_verify() with data.image...

Following the native OTA example I try to output the SHA-256 for partition table, bootloader and firmware like this: // get sha256 digest for the partition table partition.address = ESP_PARTITION_TABLE_OFFSET; partition.size = ESP_PARTITION_TABLE_MAX_LEN; partition.type = ESP_PARTITION_TYPE_DATA; es...

On checking the above example code (esp-idf/examples/wifi/getting_started/station/main/station_example_main.c) for the current IDF 4.0 I wondered if a call to xEventGroupWaitBits is missing. The event group is created, connected bit is set in the handler, but where is the code waiting for the bits s...