Texas Instruments TMS320 User Manual page 242

Stream I/O—Reading and Writing Streams
Figure 7-4. Output Trace for Example 7-5
7.3.3 Example - Reading and Writing to a DGN Device
7-12
Example 7-6 adds new SIO operations to the previous one. An output stream,
outputStream, has been added to the configuration. streamTask reads buffers
from a DGN sine device as before, but now it sends the data buffers to
outputStream rather than printing the contents to a log buffer. The stream
outputStream sends the data to a DGN user device called printData. Device
printData takes the data buffers received and uses the DGN_print2log
function to display their contents in a log buffer. The log buffer is specified by
the user in the configuration.