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BUF22821EVM-USB Software Overview

6.2.5 Reset Button

Pressing the Reset button in the BUF22821EVM-USB software performs two functions. First, a

General-Call Reset for the BUF22821 is performed. The status of the DAC registers after this General-Call

Reset default to 1000000000, or mid-supply. The second function performed after the Reset button is

pressed is that a Read DAC call is made to update the corresponding channel text boxes to the current

value for each channel.

6.2.6 Save to File Button

The register configurations of the BUF22821 DACs are displayed in both analog voltage and in

hexadecimal (refer to Figure 15). The DAC codes (that is, gamma voltages) can also be saved to a text

file (.txt) using the Save to File button.

Pressing the Save to File button opens a file-save dialog box similar to that shown in Figure 21. Pressing

the folder icon creates a new folder on your PC. It is a good idea to create a directory exclusively for

BUF22821 DAC code (gamma voltage) files. Enter a unique file name in the File name field to store your

BUF22821 register information. Press the OK button to save the file.

Figure 21. Save File Prompt

SBOU117–September 2011 BUF22821EVM-USB Evaluation Board and Software Tutorial

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