ref manual clarification needed: GPIO locking

[lanchon]

Posted on March 22, 2008 at 06:29

ref manual clarification needed: GPIO locking

[lanchon]

Posted on May 17, 2011 at 12:26

also TIM1 locking:

''12.4.12 Using the break function

[...] The LOCK bits can be written only once after an MCU reset.''

''12.5.18 Break and dead-time register (TIM1_BDTR)

Bits 9:8 LOCK[1:0]: Lock Configuration.

[...] The LOCK bits can be written only once after the reset. Once the TIM1_BDTR register has been written, their content is frozen until the next reset.''

same question, what type of reset will clear the lock?

[lanchon]

Posted on May 17, 2011 at 12:26

''5.1.6 GPIO locking mechanism

[...] it is no longer possible to modify the value of the port bit until the next reset.''

''5.2.7 Port configuration lock register (GPIOx_LCKR)

[...] it is no longer possible to modify the value of the port bit until the next reset.''

what reset? is a peripheral-local reset enough? software reset? POR?

[lanchon]

Posted on May 17, 2011 at 12:26

I tested the TIM1 lock; a peripheral reset (TIM1_DeInit()) clears it.