Hi I need to generate a one pulse mode, but I need to trigger PWM inside software by writing code not by trigger a pin in CPU.. How could I do it ? which register should be 1 ?

I mean, I setup TIM1 CH1 as output PWM, One pulse mode, but I need to trigger it by my codes

for example which register should be set to high or low to generate a pulse on TIM1 CH1

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Best answer by waclawek.jan

You don't need any "trigger source" if you want to start the timer by software.

"Trigger" there means an input which, through hardware and the slave-mode controller (see TIMx_SMCR) enables the same TIMx_CR1.CEN bit.

JW

Super User

TIM1->CR1 |= TIM_CR1_CEN;

JW

Associate

Thanks Waclawek.. so that, which is trigger source ? which trigger source I should select in config ?

Associate

is it right ?

Trigger source : ITR0

Super User

You don't need any "trigger source" if you want to start the timer by software.

"Trigger" there means an input which, through hardware and the slave-mode controller (see TIMx_SMCR) enables the same TIMx_CR1.CEN bit.

JW

Associate

Thanks, I will try it and hope to reach it:grinning_face:

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