sdcardio

Interface to an SD card via the SPI bus

class sdcardio.SDCard(bus: busio.SPI, cs=digitalio.DigitalInOut, baudrate=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.

count()

Returns the total number of sectors

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

Returns

The number of 512-byte blocks, as a number

deinit()

Disable permanently.

Returns

None

readblocks(start_block: int, buf: bytearray)

Read one or more blocks from the card

Parameters

• start_block (int) – The block to start reading from

• buf (bytearray) – The buffer to write into. Length must be multiple of 512.

Returns

None

writeblocks(start_block: int, buf: bytearray)

Write one or more blocks to the card

Parameters

• start_block (int) – The block to start writing from

• buf (bytearray) – The buffer to read from. Length must be multiple of 512.

Returns

None