nvm – Non-volatile memory — Adafruit CircuitPython 1 documentation (original) (raw)

The nvm module allows you to store whatever raw bytes you wish in a reserved section non-volatile memory.

Note that this module can’t be imported and used directly. The sole instance of ByteArray is available atmicrocontroller.nvm.

Available on these boards

class nvm.ByteArray

Presents a stretch of non-volatile memory as a bytearray.

Non-volatile memory is available as a byte array that persists over reloads and power cycles. Each assignment causes an erase and write cycle so its recommended to assign all values to change at once.

Usage:

import microcontroller microcontroller.nvm[0:3] = b"\xcc\x10\x00"

Not currently dynamically supported. Access the sole instance through microcontroller.nvm.

__bool__() → bool

__len__() → int

Return the length. This is used by (len)

__getitem__(index: slice) → bytearray

__getitem__(index: int) → int

Returns the value at the given index.

__setitem__(index: slice, value: circuitpython_typing.ReadableBuffer) → None

__setitem__(index: int, value: int) → None

Set the value at the given index.