infrared

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Altera already provides the IrDA UART IP core. You can find it in Qsys. ftp://ftp.altera.com/up/pub/altera_material/14.1/university_program_ip_cores/communications/irda.pdf

Are you trying to create your own hardware driver for it?? It would involve reading the RXD and TXD signals and then decoding them into a UART byte stream. Not the most complicated task, but it isn't easy either. Why don't you just use the pre-made Altera IP. This way you can get your 2 FPGA's talking via IrDA w/o too much development.

You still need to use Nios and do some C coding.

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FPGA already contains the infrared component each FPGA contains (emeteur / receiver)

and there are pines inputs and output for that we can affect the data

I just need to know! how I'm going to program this component and i should use VHDL as programming language

tanks so so so so much for your help