I would start with this App Note: https://support.logicpd.com/DesktopModules/Bring2mind/DMX/Download.aspx?portalid=0&EntryId=745
It's called AN 422 Accessing the DSP on the OMAP-L138 SOM-M1. The default processor is the ARM, so you have to enable the DSP.
The software packages for the OMAP-L138 EVM were developed by TI and the hardware was developed by Logic PD, so most of the software How-To guides are on TI's support site, but we have some examples on our support site as well.
http://processors.wiki.ti...oftware_Design_Guide adam