On your final project board, make blinky for yourself. Then add a button to turn the LED on and off. Bonus points for making the button cause an interrupt. Triple bonus points for debouncing the button signal.
What are the hardware registers that cause the LED to turn on and off? (From the processor manual, don’t worry about initialization.)
LED1 is mapped to PA_5.
And that's in GPIO Port A.
According to the manual, each GPIO port has an associated GPIO port output data register (GPIOx_ODR).
What are the button registers that you read?
The board has a built-in USER button that I'm reading.
That is GPIO PC_13.
Can you read that memory directly and see the button change in a debugger or by printing out the associated memory?
Yes, I did some printf debugging here.