pdb_dac32_trigger

Overview

The pdb_dac32_trigger example shows how to use the PDB to generate a DAC trigger.

Based on the basic counter, to use the DAC trigger, just to enable the DAC trigger’s “milestone” and set the user-defined value for it. The DAC’s “milestone” is called as “interval”. Multiple DAC trigger intervals can be included into one PDB counter’s cycle. DAC trigger’s counter would reset after the trigger is created and start counting again to the interval value.

In this example, the DAC32 is configured with hardware buffer enabled in normal work mode. Once it gets the trigger from the PDB, the buffer read pointer increases.

Running the demo

When the demo runs successfully, the log would be seen on the OpenSDA terminal like:

PDB DAC32 trigger Example.

DAC32 Buffer Information Buffer index max : 15 Buffer watermark : 14 Type any key into terminal to trigger the DAC buffer through PDB …

DAC32 Buffer Index 0: ReadPointerTopPositionEvent DAC32 Buffer Index 1: DAC32 Buffer Index 2: DAC32 Buffer Index 3: DAC32 Buffer Index 4: DAC32 Buffer Index 5: DAC32 Buffer Index 6: DAC32 Buffer Index 7: DAC32 Buffer Index 8: DAC32 Buffer Index 9: DAC32 Buffer Index 10: DAC32 Buffer Index 11: DAC32 Buffer Index 12: DAC32 Buffer Index 13: DAC32 Buffer Index 14: WatermarkEvent DAC32 Buffer Index 15: ReadPointerBottomPositionEvent