Pulse generation

Without Software:
Paralell-In/Serial Out 8 Bit Shift Register (74xx165, 74xx589, ...) and 
Clock Generator.

> I need to send : 11001100 to IR led.
> freq= 38kHz

That's a 9500Hz square wave ...

Dear Lothar M.
This is my Example.
I receive IR signal by IR receiver. And I convert it to binary and save 
it.
Now I want to emit it by IR led.
Example I recieve IR signal after converting:
1010000010010100010100011000001101100000010101011000010001010100.
I need to emit it to IR led.
How can I do?

I use MCU of Silabs.
EFR32. I need some code to do it.
maybe use timer.

qa wrote:

> I receive IR signal by IR receiver. And I convert it to binary and save
> it.

What do you mean with 'convert to binary'? What you receive, IS binary 
already.

> Now I want to emit it by IR led.
> Example I recieve IR signal after converting:
> 1010000010010100010100011000001101100000010101011000010001010100.
> I need to emit it to IR led.
> How can I do?

You need more than the carrier frequency and the bits to modulate. The 
missing is the duration of each bit. Best in units of periods of the 
carrier frequency.