How to set the frequency of IR pulse transmission?

Question

Arduino

How to set the pulse frequency on the transmitter's IR diode? To transmit a signal at a frequency of 56kHz for example.

Answer 1

The easiest way is to hang the IR on the UART. And if not, then use a timer with DMA (of course, choose the right microcontroller).
But still, UART is the easiest: we hook DMA there and it sends itself everything that is needed by analogy with 1-wire.

Answer 2

The most precise way to set the frequency is with the timer interrupt library TimerOne. the minimum interval is 1 microsecond (the maximum frequency is 1,000,000 Hz).