Data flows into and out of an AI Engine kernel through access windows, or a stream interface. During debug you might want
to see the value of these data access windows as data is passing through the
kernels. In the case of data windows, the Vitis
IDE debug environment provides methods to view and access the data as described in
Viewing Data from Window Interfaces. In the case of stream
interface connections, it is recommended to add printf() statements to your code to let you examine the data passing
through the kernel.
printf() statements to the code suppresses compiler
optimizations, and results in a larger kernel executable program that might not fit
into the available memory of the AI Engine processor.When adding the printf() statement in your
kernel code you must also add the --profile option
in the Run/Debug Configuration dialog box in the Vitis IDE. Add --profile to the
arguments tab of the Debug Configuration, along with whatever other options are
already specified, as shown in the following figure.
Adding the printf() statements to your source
code, results in the output of streaming data as it is processed by the kernel. The
following figure shows an example of such output in the console window. This
provides visibility to capture and debug the dataflow through streaming
interfaces.
