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Timer Clock Source
Configuration Registers
CR1
Configuration register 1
| CKD | 00 | tDTS ⇒ tCKINT |
| 01 | tDTS ⇒ 2 · tCKINT | |
| 10 | tDTS ⇒ 4 · tCKINT | |
| 11 | Reserved |
SMCR
Slave mode control register
| ETP | 0 | ETR is noninverted, active at high level or rising edge (reset state) | |
| 1 | ETR is inverted, active at low level or falling edge | ||
| ETPS | 00 | Prescaler off (reset state) | |
| 01 | fETRP / 2 | ||
| 10 | fETRP / 4 | ||
| 11 | fETRP / 8 | ||
Programming Example
The code snippet below shows how to configure and use a GPIO pin as input.
#include "reg_stm32f4xx.h" /* TO-DODELI DOO. */