TI OMAP-L138. Acquiring data into MATLAB

Good night

I am a student, working on a DSP project. I need to acquire data from a TI OMAP-L138 LCDK output into matlab workspace for further processing. I was able to do that by connecting the OMAP output to the PC mic analog input and use the sound card. However, it only worked for higher frequency ranges. My project involves work with low frequencies and the microphone cannon pick such signals up. I have watched several tutorials and found that it is possible to acquire signals into matlab from tecktronic function generators, connected through USB or RS232. However, an instrument driver for this generator already exists in Matlab. Any chance someone can help me to find a driver that would work for OMAP-L138?

Thank you