class FlashArea – access to built-in flash storage¶
Uses Zephyr flash map API.
This class allows access to device flash partition data. Flash area structs consist of a globally unique ID number, the name of the flash device the partition is in, the start offset (expressed in relation to the flash memory beginning address per partition), and the size of the partition that the device represents. For fixed flash partitions, data from the device tree is used; however, fixed flash partitioning is not enforced in MicroPython because MCUBoot is not enabled.
- class zephyr.FlashArea(id, block_size)¶
Gets an object for accessing flash memory at partition specified by
idand with block size of
idvalues are integers correlating to fixed flash partitions defined in the devicetree. A commonly used partition is the designated flash storage area defined as
FLASH_AREA_LABEL_EXISTS(storage)returns true at boot. Zephyr devicetree fixed flash partitions are
scratch_partition. Because MCUBoot is not enabled by default for MicroPython, these fixed partitions can be accessed by ID integer values 1, 2, 3, and 4, respectively.
- FlashArea.readblocks(block_num, buf)¶
- FlashArea.readblocks(block_num, buf, offset)
- FlashArea.writeblocks(block_num, buf)¶
- FlashArea.writeblocks(block_num, buf, offset)
- FlashArea.ioctl(cmd, arg)¶
These methods implement the simple and extended block protocol defined by