The 2048 byte (16kBit) FRAM device of the camera is accessible through it's corresponding driver at /dev/fram0
. To read from and write to FRAM memory the user should use normal file operations on that device (open, read, write, seek, close).
Advantages compared to Flash:
Due to the easy file based access, someone can easily play around with FRAM contents by using similar commands like:
~ $ ls / > /dev/fram0 ~ $ cat /dev/fram0
Note: FRAM is attached to the processor via serial SPI. The resulting maximum speed of read/write transfers is 3.6MBit per second.
A simple example accessing the camera's FRAM can be found → here