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AnnexF/transfer_st.txt
author Edouard Tisserant <edouard@beremiz.fr>
Mon, 22 Apr 2024 12:11:51 +0200
changeset 1104 0bc1f5a4f975
parent 0 fb772792efd1
permissions -rwxr-xr-x
Continue changing STRING length from int8_t to uint8_t.

This fix segmentation faults caused by overflow when converting from string to numeric types.
0
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FUNCTION_BLOCK TRANSFER
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 VAR_INPUT
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   AUTO : BOOL ;     (* 1 - track X0, 0 - ramp or hold *)
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   XIN : REAL ;      (* Typically from PID Function Block *)
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   FAST_RATE, SLOW_RATE : REAL ; (* Up/down ramp slopes *)
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   FAST_UP, SLOW_UP, (* Typically pushbuttons *)
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   FAST_DOWN, SLOW_DOWN : BOOL;
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   CYCLE : TIME ;    (* Sampling period *)
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 END_VAR
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 VAR_OUTPUT XOUT : REAL ; END_VAR
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 VAR XFER_RAMP : INTEGRAL ;
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     RAMP_RATE : REAL ;
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 END_VAR
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 RAMP_RATE := 0.0 ;
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 IF NOT AUTO THEN
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  IF FAST_UP THEN RAMP_RATE := FAST_RATE; END_IF;
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  IF SLOW_UP THEN RAMP_RATE := RAMP_RATE + SLOW_RATE; END_IF;
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  IF FAST_DOWN THEN RAMP_RATE := RAMP_RATE - FAST_RATE; END_IF;
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  IF SLOW_DOWN THEN RAMP_RATE := RAMP_RATE - SLOW_RATE; END_IF;
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 END_IF ;
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 XFER_RAMP (RUN := 1, CYCLE := CYCLE, R1 := AUTO,
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            XIN := RAMP_RATE, X0 := XIN) ;
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 XOUT := XFER_RAMP.XOUT;
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END_FUNCTION_BLOCK
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