On Wed, Sep 23, 2015 at 5:15 AM, Jagan Teki jteki@openedev.com wrote:
Sorry, I didn't understand why protection range or bits are specific to board, is it different in Congetc because the flash area being protected by means of sector range which is obviously the flash offset.
The protection range is board specific. For example: certain boards don't need any region to be protected at all, other boards may want the entire SPI flash to be protected. In Congatec's boards we only need to protect the last 16KiB sector because it contains data that are pre-programmed in the factory and we don't want the user to erase it.
That's why we set in the congatec board code the BP bits to 001.
m25p32
BP2/BP1/BP0=protected sectors 000 = sector (none) 001 = sector (63) 010 = sector (63, 62) .... 111 = sector (all)
I understand your concept of protecting sectors once you find the BP2, BP1 and BP0 bits on board and then you locked the particular sectors,
Yes, this is the idea.
is it? it's totally reverse way that you're trying to do is it?
No, the logic is correct. In Congatec's board we only want the last sector to be protected, hence BP2 BP1 BP0 is set to 001.