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I have been reading through documentation but could not find an answer to this, so I hope it is not impossible. Maybe there is another way to approach this?
Thanks,
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Hi,
It seems that the length of a chain must be defined only by a constant.
So you can only write : testName : STRING[10];
And not :
testLength : BYTE:=10; //Even if we initialize the value
testName : STRING[testLength]; //Not OK
Even in the case of a variable declaration (not a structure),
BR
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Thanks for confirming! I am a bit bummed out since this would make packing/unpacking structs not straight forward at all. But I guess the alternative would create possibility of buffer overflow, so it is not safe. Now, I need to really think about how to unpack structs with this limitation.
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I would like to create a struct that has variable string length. However, CoDeSys compiler is not happy since testLength is not a constant.
STRUCT
testLength : BYTE;
testName : STRING[testLength];
END_STRUCT
I have been reading through documentation but could not find an answer to this, so I hope it is not impossible. Maybe there is another way to approach this?
Thanks,
Hi,
It seems that the length of a chain must be defined only by a constant.
So you can only write : testName : STRING[10];
And not :
testLength : BYTE:=10; //Even if we initialize the value
testName : STRING[testLength]; //Not OK
Even in the case of a variable declaration (not a structure),
BR
@JAPIB,
Thanks for confirming! I am a bit bummed out since this would make packing/unpacking structs not straight forward at all. But I guess the alternative would create possibility of buffer overflow, so it is not safe. Now, I need to really think about how to unpack structs with this limitation.