There's a C header file, I want an assembly source file to include it and use the definitions. I tried this Realview's document: www.arm.com/.../1208.html But it can't help. The docuemnt said "When ex.s is passed through the C preprocessor using the following command. armcc -E ex.s > p_ex.s", but there is no place to insert this command link in ucVision3.