AnnexF/delay_st.txt
author mjsousa
Thu, 02 Jun 2016 11:59:45 +0100
changeset 1020 36fb9443b6ea
parent 0 fb772792efd1
permissions -rwxr-xr-x
fix bug introduced by commit 91bef6704b44 (parsing SFCs with transitions in ST and leading whitespace => endless loop)
0
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     1
FUNCTION_BLOCK DELAY    (* N-sample delay *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     2
  VAR_INPUT
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     3
    RUN : BOOL ;     (* 1 = run, 0 = reset *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     4
    XIN : REAL ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     5
    N   : INT        (* 0 <= N < 128 or manufacturer- *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     6
  END_VAR            (*      specified maximum value  *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     7
  VAR_OUTPUT XOUT : REAL; END_VAR   (* Delayed output *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     8
  VAR X : ARRAY [0..127]     (* N-Element queue *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
     9
               OF REAL;      (* with FIFO discipline *)
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    10
      I, IXIN, IXOUT : INT := 0;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    11
  END_VAR
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    12
  IF RUN THEN IXIN := MOD(IXIN + 1, 128) ; X[IXIN] := XIN ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    13
              IXOUT := MOD(IXOUT + 1, 128) ; XOUT := X[IXOUT];
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    14
  ELSE XOUT := XIN ; IXIN := N ; IXOUT := 0;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    15
       FOR I := 0 TO N DO X[I] := XIN; END_FOR;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    16
  END_IF ;
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    17
END_FUNCTION_BLOCK
fb772792efd1 Initial commit. Last MatPLC CVS with some makefile inclusion removed in order to compile fine out of MatPLC.
etisserant
parents:
diff changeset
    18