Hi Prad,
Unfortunately, SYS/BIOS does not support using DMTimer1_1ms. If it is a hard requirement, you can create your own Timer driver and use it as the Clock module source. Details on how to do this are provided in the SYS/BIOS cdoc, specifically the ti.sysbios.knl.Clock module (SYS/BIOS cdoc).
Regards,
-- Emmanuel
