Default Interfaces - 2020.2 English

The type of the interfaces that are created by interface synthesis depends on the data type of C argument, the default interface mode, and the interface directives. In Vitis HLS, the default interface changes depending on the data types used on the C arguments and configurations. The user selection of the open_solution -flow_target [vitis | vivado] will dictate the default interface settings.

The following figures shows the changes when the default interface protocol is enabled.

Argument type definitions (used in below tables):

• I: Input only (can only read from arg)
• O: Output only (can only write to arg)
• IO: Input & output (can read and write to arg)
• Return: Return data output
• Block: Block-level control
• D: Default mode for each typed.