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AnnexF/weigh_il.txt
author Manuele Conti <conti.ma@alice.it>
Thu, 03 Jan 2013 22:54:55 +0100
changeset 788 aa56031e5cb3
parent 0 fb772792efd1
permissions -rwxr-xr-x
Implement Mario's suggestions:
- Clean up code replace merge algorithm with a function.
- Fix for_statement setting control variable to not a constant.
- Fix for_statement checking BY expression to get correct value for optimization
branch.

Thanks Mario. 
FUNCTION WEIGH : WORD     (* BCD encoded *)
  VAR_INPUT  (* "EN" input is used to indicate "scale ready" *)
    weigh_command : BOOL;
    gross_weight : WORD ; (* BCD encoded *)
    tare_weight : INT ;
  END_VAR
(* Function Body *)
	LD	weigh_command	
	JMPC	WEIGH_NOW	
	ST	ENO	(* No weighing, 0 to "ENO" *)
	RET		
WEIGH_NOW:	LD	gross_weight	
	BCD_TO_INT		
	SUB	tare_weight	
	INT_TO_BCD		(* Return evaluated weight *)
	ST	WEIGH	

END_FUNCTION                     (* Implicit "ENO" *)
matiec