These classes represent the I/O port specification used to connect AI Engine kernels to the external platform ports representing programmable logic.
Member Functions
create(plio_type plio_width, std::string datafile);The preceding input_plio/output_plio port
specification represents a single 32-bit, 64-bit, or 128-bit input or output
AXI4-Stream port at the AI Engine-ML array interface. The datafile is an input or output file path that sources
input data or receives output data for simulation purposes. You can capture this
data separately during a simulation run.
create(std::string logical_name, plio_type plio_width, std::string datafile);The preceding input_plio/output_plio port specification represents a single
32-bit, 64-bit, or 128-bit input or output AXI4-Stream port at the AI Engine-ML array interface. Here the plio_width can be one
of plio_32_bits (default), plio_64_bits, or plio_128_bits. The logical_name must
be the same as the annotation field of the corresponding port as presented in the
logical architecture interface specification.
create(std::string logical_name, plio_type plio_width, std::string datafile, double frequency);The preceding input_plio/output_plio port specification represents a single
32-bit, 64-bit, or 128-bit input or output AXI4-Stream port at the AI Engine-ML array interface. Here plio_width can be one of
plio_32_bits (default), plio_64_bits, or plio_128_bits. The frequency of the input_plio/output_plio port can also
be specified as part of the constructor.
create(std::string logical_name, plio_type plio_width, std::string datafile, double frequency, bool binary, bool hex);The preceding input_plio/output_plio boolean port specification indicates if
the contents in the input data file are in hex or binary formats.
The data in the data files must be organized according to the bus width of
the input_plio/output_plio attribute (32, 64, or 128) per line, and also the data
type of the graph port it is connected to. For example, a 64-bit input_plio feeding a kernel port with data type
int32 requires file data organized as two
columns. However, the same 64-bit input_plio
feeding to a kernel port with data type cint16
requires the data to be organized into four columns, each representing a 16-bit real
or imaginary part of the complex data type.