Matlab/SIMULINK profile

The Matlab/SIMULINK mapper is stored inside file simulink_A_mapper.py. The logic behind this mapper was built in close co-ordination with ESA Simulink experts.

• BOOLEANs are directly mapped to booleans, inside AliasTypes.
• Simulink offers 6 distinct target types for INTEGERs: int8, uint8, int16, uint16, int32, uint32. They constitute the different combinations of signed and unsigned integers of 8, 16 and 32 bits - and the mapper takes the ASN.1 constraints of INTEGERs into account when creating the appropriate target SIMULINK type (AliasType). The Description attribute also offers the exact range constraint used.
• REALs are mapped to doubles (inside AliasTypes). The Description attribute also offers the exact range constraint used.
• Any ENUMERATED is mapped to an int32. The originating ASN.1 type is specified in a special comment accompagnying the new type ("values of ENUMERATED EnumTypeName"). The values themselves are available as Simulink values, named EnumTypeName_value_OptionName, where EnumTypeName is the ASN.1 type name and OptionName is the name of the enumerant option.
• SEQUENCEs are mapped to Simulink Buses. The Elements attribute is used to enumerate all the comprising types, so the necessary types are defined by the mapper before the actual Bus definition. Fields using standard types get "temporary" types: For example, any ASN.1 string field gets a corresponding "octet_string_X" pseudo-type, with X being an increasing number (per string), and each temporary type reflecting any possible string specific size constraint.
• CHOICEs are mapped just like SEQUENCEs, but with an extra choiceIdx of type uint8. This index will point to which option is actually used in the Choice (the index starts at 1 for the first option).
• SEQUENCE OFs are represented with a number of individual elements of the contained type, named TypeName_member_X.
• SETs and SET OFs are handled just as SEQUENCE and SEQUENCE OFs.