:mod:`sdcardio`
===============

.. py:module:: sdcardio

.. autoapi-nested-parse::

   Interface to an SD card via the SPI bus



.. raw:: html

    <p>
    <details>
    <summary>Available on these boards</summary>
    <ul>
    <li> AITHinker ESP32-C3S_Kit
    <li> ARAMCON Badge 2019
    <li> ARAMCON2 Badge
    <li> ATMegaZero ESP32-S2
    <li> Adafruit CLUE nRF52840 Express
    <li> Adafruit Circuit Playground Bluefruit
    <li> Adafruit EdgeBadge
    <li> Adafruit Feather Bluefruit Sense
    <li> Adafruit Feather ESP32-S2 TFT
    <li> Adafruit Feather ESP32S2
    <li> Adafruit Feather M4 CAN
    <li> Adafruit Feather M4 Express
    <li> Adafruit Feather MIMXRT1011
    <li> Adafruit Feather RP2040
    <li> Adafruit Feather STM32F405 Express
    <li> Adafruit Feather nRF52840 Express
    <li> Adafruit FunHouse
    <li> Adafruit Grand Central M4 Express
    <li> Adafruit Hallowing M4 Express
    <li> Adafruit ItsyBitsy M4 Express
    <li> Adafruit ItsyBitsy RP2040
    <li> Adafruit ItsyBitsy nRF52840 Express
    <li> Adafruit KB2040
    <li> Adafruit LED Glasses Driver nRF52840
    <li> Adafruit Macropad RP2040
    <li> Adafruit MagTag
    <li> Adafruit Matrix Portal M4
    <li> Adafruit Metro ESP32S2
    <li> Adafruit Metro M4 Airlift Lite
    <li> Adafruit Metro M4 Express
    <li> Adafruit Metro nRF52840 Express
    <li> Adafruit Monster M4SK
    <li> Adafruit PyGamer
    <li> Adafruit PyPortal
    <li> Adafruit PyPortal Pynt
    <li> Adafruit PyPortal Titano
    <li> Adafruit Pybadge
    <li> Adafruit QT Py ESP32S2
    <li> Adafruit QT Py RP2040
    <li> Adafruit QT2040 Trinkey
    <li> Adafruit Trellis M4 Express
    <li> AloriumTech Evo M51
    <li> Arduino Nano 33 BLE
    <li> Arduino Nano RP2040 Connect
    <li> Artisense Reference Design RD00
    <li> AtelierDuMaker nRF52840 Breakout
    <li> BDMICRO VINA-D51
    <li> BLE-SS dev board Multi Sensor
    <li> BastBLE
    <li> BastWiFi
    <li> BlueMicro840
    <li> CP32-M4
    <li> Capable Robot Programmable USB Hub
    <li> Challenger NB RP2040 WiFi
    <li> Challenger RP2040 LTE
    <li> Challenger RP2040 WiFi
    <li> CircuitBrains Deluxe
    <li> CrumpS2
    <li> Cytron Maker Nano RP2040
    <li> Cytron Maker Pi RP2040
    <li> DynOSSAT-EDU-OBC
    <li> DynaLoRa_USB
    <li> ESP 12k NodeMCU
    <li> Electronut Labs Blip
    <li> Electronut Labs Papyr
    <li> EncoderPad RP2040
    <li> Espruino Pico
    <li> Espruino Wifi
    <li> Feather ESP32S2 without PSRAM
    <li> Feather MIMXRT1011
    <li> Feather MIMXRT1062
    <li> FeatherS2
    <li> FeatherS2 Neo
    <li> FeatherS2 PreRelease
    <li> Franzininho WIFI w/Wroom
    <li> Franzininho WIFI w/Wrover
    <li> Gravitech Cucumber M
    <li> Gravitech Cucumber MS
    <li> Gravitech Cucumber R
    <li> Gravitech Cucumber RS
    <li> HMI-DevKit-1.1
    <li> HiiBot BlueFi
    <li> IMXRT1010-EVK
    <li> IkigaiSense Vita nRF52840
    <li> Kaluga 1
    <li> LILYGO TTGO T8 ESP32-S2 w/Display
    <li> MDBT50Q-DB-40
    <li> MDBT50Q-RX Dongle
    <li> MEOWBIT
    <li> MORPHEANS MorphESP-240
    <li> MakerDiary nRF52840 MDK
    <li> MakerDiary nRF52840 MDK USB Dongle
    <li> Makerdiary M60 Keyboard
    <li> Makerdiary Pitaya Go
    <li> Makerdiary nRF52840 M.2 Developer Kit
    <li> Melopero Shake RP2040
    <li> Metro MIMXRT1011
    <li> MicroDev microC3
    <li> MicroDev microS2
    <li> Mini SAM M4
    <li> NUCLEO STM32F746
    <li> NUCLEO STM32F767
    <li> NUCLEO STM32H743
    <li> OPENMV-H7 R1
    <li> Oak Dev Tech BREAD2040
    <li> Oak Dev Tech PixelWing ESP32S2
    <li> Open Hardware Summit 2020 Badge
    <li> PCA10056 nRF52840-DK
    <li> PCA10059 nRF52840 Dongle
    <li> PYB LR Nano V2
    <li> Particle Argon
    <li> Particle Boron
    <li> Particle Xenon
    <li> Pimoroni Interstate 75
    <li> Pimoroni Keybow 2040
    <li> Pimoroni PGA2040
    <li> Pimoroni Pico LiPo (16MB)
    <li> Pimoroni Pico LiPo (4MB)
    <li> Pimoroni PicoSystem
    <li> Pimoroni Plasma 2040
    <li> Pimoroni Tiny 2040
    <li> PyCubedv04
    <li> PyCubedv04-MRAM
    <li> PyCubedv05
    <li> PyCubedv05-MRAM
    <li> PyKey60
    <li> PyboardV1_1
    <li> RP2040 Stamp
    <li> Raspberry Pi Pico
    <li> Robo HAT MM1 M4
    <li> S2Mini
    <li> S2Pico
    <li> SAM E54 Xplained Pro
    <li> SAM32v26
    <li> SPRESENSE
    <li> ST STM32F746G Discovery
    <li> STM32F411E_DISCO
    <li> STM32F412G_DISCO
    <li> STM32F4_DISCO
    <li> Saola 1 w/Wroom
    <li> Saola 1 w/Wrover
    <li> Seeeduino Wio Terminal
    <li> Silicognition LLC M4-Shim
    <li> SparkFun MicroMod RP2040 Processor
    <li> SparkFun MicroMod SAMD51 Processor
    <li> SparkFun MicroMod nRF52840 Processor
    <li> SparkFun Pro Micro RP2040
    <li> SparkFun Pro nRF52840 Mini
    <li> SparkFun STM32 MicroMod Processor
    <li> SparkFun Thing Plus - RP2040
    <li> SparkFun Thing Plus - SAMD51
    <li> Sprite_v2b
    <li> TG-Boards' Datalore IP M4
    <li> TG-Watch
    <li> THUNDERPACK_v11
    <li> THUNDERPACK_v12
    <li> Targett Module Clip w/Wroom
    <li> Targett Module Clip w/Wrover
    <li> Teensy 4.0
    <li> Teensy 4.1
    <li> Teknikio Bluebird
    <li> The Open Book Feather
    <li> Thingz - Galaxia
    <li> TinkeringTech ScoutMakes Azul
    <li> TinyS2
    <li> UARTLogger II
    <li> WarmBit BluePixel nRF52840
    <li> Winterbloom Sol
    <li> XinaBox CS11
    <li> iMX RT 1020 EVK
    <li> iMX RT 1060 EVK
    <li> nanoESP32-S2  w/Wrover
    <li> nanoESP32-S2 w/Wroom
    <li> nice!nano
    <li> stm32f411ce-blackpill
    <li> stm32f411ce-blackpill-with-flash
    </ul>
    </details>
    </p>




.. py:class:: SDCard(bus: busio.SPI, cs: microcontroller.Pin, baudrate: int = 8000000)

   SD Card Block Interface

   Controls an SD card over SPI.  This built-in module has higher read
   performance than the library adafruit_sdcard, but it is only compatible with
   `busio.SPI`, not `bitbangio.SPI`.  Usually an SDCard object is used
   with ``storage.VfsFat`` to allow file I/O to an SD card.

   Construct an SPI SD Card object with the given properties

   :param busio.SPI spi: The SPI bus
   :param microcontroller.Pin cs: The chip select connected to the card
   :param int baudrate: The SPI data rate to use after card setup

   Note that during detection and configuration, a hard-coded low baudrate is used.
   Data transfers use the specified baurate (rounded down to one that is supported by
   the microcontroller)

   .. important::
      If the same SPI bus is shared with other peripherals, it is important that
      the SD card be initialized before accessing any other peripheral on the bus.
      Failure to do so can prevent the SD card from being recognized until it is
      powered off or re-inserted.

   Example usage:

   .. code-block:: python

       import os

       import board
       import sdcardio
       import storage

       sd = sdcardio.SDCard(board.SPI(), board.SD_CS)
       vfs = storage.VfsFat(sd)
       storage.mount(vfs, '/sd')
       os.listdir('/sd')

   .. py:method:: count() -> int

      Returns the total number of sectors

      Due to technical limitations, this is a function and not a property.

      :return: The number of 512-byte blocks, as a number


   .. py:method:: deinit() -> None

      Disable permanently.

      :return: None


   .. py:method:: readblocks(start_block: int, buf: _typing.WriteableBuffer) -> None

      Read one or more blocks from the card

      :param int start_block: The block to start reading from
      :param ~_typing.WriteableBuffer buf: The buffer to write into.  Length must be multiple of 512.

      :return: None


   .. py:method:: sync() -> None

      Ensure all blocks written are actually committed to the SD card

      :return: None


   .. py:method:: writeblocks(start_block: int, buf: _typing.ReadableBuffer) -> None

      Write one or more blocks to the card

      :param int start_block: The block to start writing from
      :param ~_typing.ReadableBuffer buf: The buffer to read from.  Length must be multiple of 512.

      :return: None