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someone knows how I can scan the bits of one WORD variable?
For example:
I have the WORD variable that contains the axes mask (1=axle X, 2=Y, 3=XY, 4=Z and so).
Now I want to take this variable and analyze it to know how many axes I have to move, so I have to see each bit of the WORD and see if it is TRUE or FALSE.
I saw that I can refer to the specific bit with the instruction:
IF myAxesMask.0 THEN
AxesToMove := AxesToMove + 1;
END_IF
But in this way I have to do 16 of this instructions.
My idea was to do something like that:
FOR i := 0 TO 15 DO
IF myAxesMask.i THEN
AxesToMove := AxesToMove + 1;
END_IF
END_FOR
Unfortunately this won't be acepted by the compiler.
Someone knows is there is a "clean" solution similar with the FOR instruction?
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Rlc moves the settted bit (1) i positions..
I don t remember the instruction name exactly, possibly rlc moves the bit to right and you want to move to left... Look at online help to find the exact instruction
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Hi to the forum,
someone knows how I can scan the bits of one WORD variable?
For example:
I have the WORD variable that contains the axes mask (1=axle X, 2=Y, 3=XY, 4=Z and so).
Now I want to take this variable and analyze it to know how many axes I have to move, so I have to see each bit of the WORD and see if it is TRUE or FALSE.
I saw that I can refer to the specific bit with the instruction:
IF myAxesMask.0 THEN
AxesToMove := AxesToMove + 1;
END_IF
But in this way I have to do 16 of this instructions.
My idea was to do something like that:
FOR i := 0 TO 15 DO
IF myAxesMask.i THEN
AxesToMove := AxesToMove + 1;
END_IF
END_FOR
Unfortunately this won't be acepted by the compiler.
Someone knows is there is a "clean" solution similar with the FOR instruction?
do:
if((wordVar and rlc(16h1,i))<>0)then ....
Rlc moves the settted bit (1) i positions..
I don t remember the instruction name exactly, possibly rlc moves the bit to right and you want to move to left... Look at online help to find the exact instruction
OK,
it was a good input.
I found the function "EXTRACT" from the util library so I can do what I want.
Thx