AM261x MCU+ SDK: DAC Square wave

| AM261x MCU+ SDK 26.00.00 |

DAC Square wave

# Introduction

This example uses the DAC to generate a square wave on the DAC output.

The example does the below

- Repeatedly configures the minimum and maximum value in the DAC Shadow register after specified time intervals.
- This repeated programming of the registers generates a square wave.
- Sets the output voltage back to 0.

# External Connections

- DAC output pin can be connected to an oscilloscope to view the square wave output.

## AM263X-CC or AM263PX-CC or AM261X-SOM E1

Note: To use the reference voltage generated on ControlCard, make sure that the System VREF source select switch on ControlCard is set to position 1-2

When using with TMDSHSECDOCK (HSEC180 controlCARD Baseboard Docking Station)

- Capture waveform on HSEC Pin 9 (in case of AM261x and AM263Px please take care of IO expander)

## AM263X-LP or AM263PX-LP

Note: To use the reference voltage generated on LaunchPad, make sure that the DAC_VREF source select switch S1 on LaunchPad is set to position 1-2

With AM263X-LP or AM263Px-LP

- Capture the waveform on boosterpack header J1/J3 Pin 30

# Supported Combinations

# Steps to Run the Example

- When using CCS projects to build, import the CCS project for the required combination and build it using the CCS project menu (see Using SDK with CCS Projects).
- When using makefiles to build, note the required combination and build using make command (see Using SDK with Makefiles)
- Establish connections as mentioned in External Connections section
- Launch a CCS debug session and run the executable, see CCS Launch, Load and Run
- Use an Oscilloscope to view the square wave on DAC output pin.

# See Also

DAC

# Sample Output

Shown below is a sample output when the application is run,

DAC Square Wave Test Started ...
DAC Sqaure Wave Test Passed!!
All tests have passed!!