Using TIM on STM32

Using Timer on STM32

Timer TRGO Events

Reset

This is rarely used. Software control of the slave device is preferred.

Enable

This is rarely used. Software control of the slave device is preferred.

Update Event

This event is generated when counter overflows or underflows.

Capture Compare

This event is generated when the counter is equal to the channel pulse value. Think this as the PWM signal.

However, note that when using "Active level on match" or "Inactive level on match", it will only generate one trigger event on TRGO and will not be reset.

Repetition counter settings

PWM generation mode

To Drive Active Low LEDs

set CH Polarity to Low.

Do not change PWM Mode. The internal logic is still operating in "PWM mode 1" mode.

e.g. Setting CCR to 0 makes the channel always inactive, while setting CCR to ARR makes the channel always active.