Post by risele on Discussion for Home page ^{JSON parsing and composing library home (Post)}
Just tested with your structs and seems JSON is perfectly valid. With root: {"biota":{"PLANT":[{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null}],"ANIMAL":[{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null}]}} Rootless: {"PLANT":[{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null}],"ANIMAL":[{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null}]} The code I used: PROGRAM PLC_PRG VAR biota: ST_BIOTA; converter,converter1: STRUCT_TO_JSON; xRun,xRun1:BOOL:=TRUE; JSONString: STRING(1000); JSONStringRootless: STRING(1000); END_VAR IF xRun THEN IF converter.Done OR converter.Error THEN xRun:=FALSE; END_IF END_IF IF xRun1 THEN IF converter1.Done OR converter1.Error THEN xRun1:=FALSE; END_IF END_IF converter(JSONVars:=ADR(biota),NumberOfVars:=SIZEOF(biota)/SIZEOF(JSONVAR), JSONString:= ADR(JSONString), JSONStringSize:= SIZEOF(JSONString), Execute:=xRun,Rootless:=FALSE); converter1(JSONVars:=ADR(biota),NumberOfVars:=SIZEOF(biota)/SIZEOF(JSONVAR), JSONString:= ADR(JSONStringRootless), JSONStringSize:= SIZEOF(JSONStringRootless), Execute:=xRun1,Rootless:=TRUE); UPD: for top-level described array it also provides valid output, BUT only with ROOTLESS=FALSE option. It's not an error, I suppose, since nameless array could not exists in JSON. For biota: ARRAY [1..3] OF ST_BIOTA; output is {"biota":[{"PLANT":[{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null}],"ANIMAL":[{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null}]},{"PLANT":[{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null}],"ANIMAL":[{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null}]},{"PLANT":[{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null},{"NAME":null,"QUANTITY":null}],"ANIMAL":[{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null},{"NAME":null,"AGE":null}]}]}
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Post by noah on "Invalid Value" for Variables at Runtime ^{CODESYS Forge talk (Post)}
Hello, I also have the problem that suddenly all variables in my project were invalid and shown as "???" during runtime. Could you manage to fix the problem in the last 4,5 years ;) ? Because I tried everythin to fix it but nothing worked. I feel like maybe this is a bug. Thank you.
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Post by noah on "Invalid Value" for Variables at Runtime ^{CODESYS Forge talk (Post)}
Hello, I also have the problem that suddenly all variables in my project were invalid and shown as "???" during runtime. Could you manage to fix the problem in the last 4,5 years ;) ? Because I tried everythin to fix it but nothing worked. I feel like maybe this is a bug. Thank you.
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Post by gordonkeller360 on Escape character behavior for hex values in string -- what gives? ^{CODESYS Forge talk (Post)}
I have a program which sequentially places byte representations of characters from a string into an array. FUNCTION_BLOCK MoveBytesFromString VAR_IN_OUT abRxBuf: ARRAY [0..79] OF BYTE; END_VAR VAR testString : STRING := '$0A$R$L$TTesting,123...$94$86$0A'; iCount: DINT; END_VAR ---------------------------------------------------------------------------------------- // clear the buffer MEM.MemFill(ADR(abRxBuf), 80, 0); FOR iCount := 0 TO LEN(testString) - 1 DO // account for undesired null terminator of string abRxBuf[iCount] := testString[iCount]; END_FOR Escaped characters, like $T, $N, etc. work just fine, and so do their hex representation counterparts ($09, $0A, etc). However, when I put something like $94, I get a set of nonsense values... see image attached after one spin of the program. Could someone explain to me what is happening here? I'll continue to investigate...
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