The AI Engine compiler generates output in the form of a library file, libadf.a, which contains ELF and CDO files, as well as tool-specific data and metadata, for hardware and hardware emulation flows. To create a loadable image binary, this data must be combined with PL-based configuration data, boot loaders, and other binaries. The Vitis™ packager performs this function, combining information from libadf.a and the Vitis linker generated XSA file.
This requires the use of the Vitis packaging command (v++
--package) as described in
Vitis Compiler Command
in the Vitis Unified Software Platform
Documentation: Application Acceleration Development
(UG1393).
For Versal ACAPs, the programmable
device image (PDI) file is used to boot and program the hardware device. For
hardware emulation the --package command adds the
PDI, EMULATION_DATA
sections and the XSA file, and outputs a XCLBIN file. For hardware builds, the
package process creates a XCLBIN file containing ELF files and graph configuration
data objects (CDOs) for the AI Engine
application.
In the Vitis IDE, the package
process is automated and the tool creates the required files based on the build
target, platform, and OS. However, in the command line flow, you must specify the
Vitis packaging command (v++ --package) with the correct options for the
job.