implementing pi and pid controllers using vhdl programming

[chunduri balaji tilak]

i am trying to implement pi and pid controller on fpga using VHDL programming and i am finding it difficult to use ki, kp and kd values which are decimal or real in nature.
i understand that VHDL is strongly typed language and it does not accept ordinar conventional type transformations. so i need some feeds on this. thankyou.