Return from function to pass into another function?

Hello all,

I want to pass the output of one function (10b8b decoder) into the input of another function viz. drive, where in drive function, I am creating the array out of each byte received from decoder. But when I am trying to Return that value from decoder, its not happening.

Can someone please tell me how to return the decoder output value and take it in as an input into the drive function? I would appreciate it.

Thanks