I'm using a Nucleo L152RE.
I've read the 900 pages manual multiple times but I still miss a clear view of what needs to be done to create a RTC Wakeup event.
I read in the manual:
"""
To enable the RTC Wakeup interrupt, the following sequence is required:
1. Configure and enable the EXTI Line 20 in interrupt mode and select the rising edge
sensitivity.
2. Configure and enable the RTC_WKUP IRQ channel in the NVIC.
3. Configure the RTC to generate the RTC wakeup timer event.
"""
But I don't understand what all that means.
Could you translate it for me in terms of operations that need to be done?
All of the three tasks I quoted start with "configure", this is way too vague for me. What does that mean, "configure" ? What needs to be done? I guess some registers, or bits somewhere must be modified. Which ones? How exactly do you "configure" those things?
Maybe all the 3 steps is too much, so, let's start with step 1:
"Configure and enable the EXTI Line 20 in interrupt mode"
What does that mean? What do I do?
"and select the rising edge sensitivity"
What is that? How do I select it?
Just step 1 will do for now.
Please help.
The whole manual is like that.
