JS202011SCQN datasheet(21/45 Pages) MICROCHIP

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Software GUI Description

 2017 Microchip Technology Inc.

DS50002673A-page 21

PAC1934 Data Sheet).This register is important if the SLOW pin is being used, the user will

be able to capture the data for very accurate energy calculation when switching from a pro-

grammed sample rate to the eight samples/second rate under control of the SLOW pin. If

the SLOW pin is not being used, these settings can be ignored.

FIGURE 3-5:

REFRESH COMMANDS DIALOG BOX

The Start Acquisition button, displayed in Figure 3-1 (2), toggles into Stop Acquisi-

tion when clicked. When the button is clicked, a REFRESH command is sent to the

PAC1934 and it starts collecting conversion data in the accumulator. The GUI starts

sending REFRESH_V commands to the PAC1934 and reading results data from all of

the results registers for data plotting (and logging, if selected).

When clicked, the Refresh button, displayed in Figure 3-1 (4), sends a command to the

PAC1934, updating the control registers and loading all the results from the ADCs and

the accumulator into the readable registers. The refresh command also resets the

accumulators and the accumulator count.

The Log to File button, displayed in Figure 3-1 (5), toggles when clicked to stop the

logging to file process and turns data logging on and off. In order to log the data, the

user must be acquiring. The data file is a CSV file created in the directory where the

GUI has been installed. There is a link next to this button to open the last log. Stop

acquiring data before opening the log file. When the Open Last Log button is clicked,

the most recent data log is opened. It can be noticed that all of the results data is cap-

tured, and each column has a header identifying the data. Figure 3-6 shows one corner

of a log file.

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