Well Shahzad, if you want to make this a function call you should probably do what Erik suggests write a skeleton in C and convert it. However, because you are using the Raisonance tools you have another option.

If all you want to do is manipulate data within the C function you can use the "asm" keyword as described on page 37 of the RC51 manual. This allows you to just code up your assembly "inline" with the C code and keep your high level language support AND your assembly advantages. Your C file isn't converted to assembly, the assembly is just located inline at the location specified by the code.

Bryan Whitton