1 Description

This DAC8 function generator subsystem example shows how to implement a basic function generator to output a sine wave using the integrated DAC8, a timer triggered DMA, and an OPAx module. A 256-point sine wave data table written in the code is loaded to the DAC8 about every 40μs using a timer to trigger the DMA transfers. This generates an approximate 98Hz, 256-point sine wave. The OPA is used to buffer the DAC output and route the signal to an external pin, PA22 (OPA0_Out).

Figure 1-1 DAC8 Function Generator Block Diagram