I am trying to generate a sine wave digitally. I am using LMS7200m RF chip from Lime microsystems. I want to generate a sine wave of 100KHz. The DAC on the chip has a sampling rate of 640 MHz with 12bits resolution. How can I do it in C++ or C code reliably? The Rf chips accepts only I and Q values as inputs. I am new to digital signal processing can any one help me understand on how to generate I and Q values for the sine wave in question. Thanks.