Functions SCPI_ParamNumber and SCPI_NumberToStr has one more parameter - array of special values. It is still possible to use provided scpi_special_numbers_def, but you are free to use different deffinition per parameter.
Function SCPI_ParamChoice has different type of choice list. It is now array of scpi_choice_def_t and not array of const char *. It is now possible to define tag. SCPI_ParamChoice will now return value of this tag and not index to array. If you want print the name of the choice value, you should now use SCPI_ChoiceToName instead of direct indexing of the array.
Function SCPI_ParamText has been replaced by SCPI_ParamCharacters. This function just returns pointer to raw buffer with text. If you need propper handling of quotes inside text, you should use SCPI_ParamCopyText. It needs secondary buffer but it handle strings correctly like "normal ""quoted"" normal" will be converted to normal "quoted" normal.
It is now possible to use SCPI_ParamArbitraryBlock and SCPI_ResultArbitraryBlock to work with binary data input and output.
Test callback is removed from context. You should now reimplement whole *TST? command callback.