IQ Datatransmit

(SDR-Lime Mini)
i need help to build an conform I/Q Datastream for the fpga, i have see all examples, but nothing has do the work for me. We need an Funktion they can transform AudioWave to I/Q Data Stream please help in this case. We don’t use Linux it’s for w10.

Why is it so much difficult, its only a bit Vector calculation, but the result is always not what is need.

An Easy Function need to transfom wave to FM 5Khz Bandwidth RF Signal .

thx for help.