dualbank – DUALBANK Module¶
The dualbank module adds ability to update and switch
between the two app partitions.
There are two identical partitions, these contain different firmware versions. Having two partitions enables rollback functionality.
The two partitions are defined as boot partition and
next-update partition. Calling dualbank.flash() writes
the next-update partition.
After the next-update partition is written a validation check is performed and on a successful validation this partition is set as the boot partition. On next reset, firmware will be loaded from this partition.
Here is the sequence of commands to follow:
import dualbank
dualbank.flash(buffer, offset)
dualbank.switch()
Available on these boards
- dualbank.flash(*buffer: _typing.ReadableBuffer, offset: int = 0) None¶
Writes one of two app partitions at the given offset.
This can be called multiple times when flashing the firmware in small chunks.