SD Card Library

Basic library for initialized sd-card via ESP-IDF v5.5.1. The library has been tested on a Micro SD Card Adapter.

To work with files, use the abstraction of the C standard library FILE from stdio.h

Warning

Stable power is needed to initialize the SD card, so if the 0xffffffff error is thrown when mounting the SD card, there are problems with the contacts or with the power supply (stable 5V should be supplied, but 3.3V when connected directly).

Methods

Initialize the card

esp_err_t sdcard_init(gpio_num_t cs, gpio_num_t sck, gpio_num_t mosi, gpio_num_t miso);

Output

I (331) main_task: Calling app_main()
Bus initialized.
Adding device...
I (671) sdspi_transaction: cmd=52, R1 response: command not supported
I (711) sdspi_transaction: cmd=5, R1 response: command not supported
SD Card initialized.
The content has been added to the file '/sdcard/test.txt'
Opening /sdcard/test.txt file...
Hello from ESP32!

I (891) main_task: Returned from app_main()