How to count time ( like 2ms, 3 ms) in stm32f413zh without timer

[Pavel A.]

Very easy, and in a lot of ways. For one... set up a UART for baud rate 9600. Transmit a 8-bit character and enable interrupt for TX completion (or poll). It will trigger in 0.96 ms. And so on and so on.

[Tesla DeLorean]

Why?

Without a TIM, or just without using the Interrupt it can optionally generate?

You can free-run most TIM, there are TIM without pins. You can read a value, advancing in micro-seconds.

You could use the DWT CYCCNT and observe processor cycles.

[Andrei Chichak]

Do you consider the SYSTICK as a timer? It does exactly what you want without using a TIM timer.