How to lock avr-x devices ?

plouf · Joined: 19 Jan 2012 Posts: 117 Location: Athens,Greece

i have a 32dd32, working with program in it
i try with mcs updi (Serial) to set the lock "Lock key = read and write lock"

since i set it frm the fuse page, and push "write fuse" avr stops working ! no other config,
i try to a second one 32dd32 push "refresh fuse" first, the lock, again it briked !

a) How can i set lock correctly ?
b) isnt after lock, able to recover it witha chiperase ? (no updi disable offcourse)
c) is "Config Fuses=ON,Lock=ON" enought to program and lock in 1 step ?

thanx

albertsm · Joined: 09 Apr 2004 Posts: 6321 Location: Holland

a : there is only 1 lock. it is either locked or not. correct way is option c
c : the idea is that you compile with both on. then use auto program and then the chip is locked.
b: using the UNLOCK option of the programmer you should be able to use it again. it will erase the chip.

Check config fuses in the help.