GPIO
| Button | Method |
|---|
| PF10 | EXTI |
| PC0 | EXTI |
| PC1 | EXTI |
| PA0 | Poll every 5–10 ms using some timer or leave. Cant interrupt using both PC1 and PA0 |
| PH2 | EXTI |
| PH3 | EXTI |
TIMER13 for LED
Enable NVIC interrupt
TIMER 14
Enable Nvic
Tim14 should be 0, control loop highest priority
Tim13 can be 5
Systick last 15
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