Dear Friends, I am trying to port Linux PXA audio driver to RTLinux. I am using pxa-ac7.c and pxa-audio.c and eliminated sound_core.c, and i will register two device /dev/mixer and /dev/dsp to RTLinux kernel. The real need is, i wants to generate a sin wave using audio codec. With in 600us DMA controller should fill the codec FIFO, if that is not met distortion will happen. I think normal linux interrupts and Process scheduling may cause some problems. In porting it seems difficult to port kernel scheduling , dynamic memory allocation(for DMA) and synchronization. Please help me Nobin Mathew __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/