I cant change my duty cycle in LL TIM Library. I cant change my signal too. I want change my motor power. How can i do this?

[Tesla DeLorean]

Should be a macro or wrapper,

Typically one just writes the register TIM2->CCR1 = (TIM2->ARR + 1) / 2; // 50/50 duty

[TDK]

LL_TIM_OC_SetCompareCH1 does this.

If you're modifying ARR or PSC, you may need to generate or wait for an update event for them to become active.