This Driver allows configuring frames that contain data fields, delimiters, and CRC (Cyclic Redundancy Check) verification. These fields can be optional or depend on the existence of an optional field, as needed. The next figure contains examples of frame constructions supported by this Driver, in which each circle represents a frame field and the number inside that circle indicates its position.
Examples of frames
These examples of frame configurations are described on the next table.
Examples of frame configurations
Example |
Description |
|---|---|
Simple |
A linear frame composed of sequential fields |
With Optional |
A frame that includes optional fields |
With Optional and Required |
A frame that includes optional fields and fields that depend on the existence of an optional field |
With Two Optionals |
A frame that includes two sequential optional fields |
Complex |
A frame that includes optional fields, fields that depend on the existence of other fields, and fields that are both optional and depend on the existence of other fields |
NOTES |
•There can be, at most, two consecutive optional fields that are either independent or depend on the same field. •If an optional field follows a field that depends on another field, the optional field must depend on the same field as the previous one. •A field that depends on another field can only exist if the field that it depends on is optional or depends on another field. •Fields of a frame can have fixed or variable sizes. However, it is mandatory to insert a delimiter field between two fields without a fixed size. |