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2.1
Starting the Serial Interface Program
DAC5687 EVM Operational Procedure
Power up the EVM. After power up, depress switch S1 to reset the DAC5687. Start the software by
running the following executable:
C:\Program Files\TI.fdr\DAC5687_SPI\ DAC5687_SPI.exe.
If the EVM is powered on with the parallel port connected properly, then the GUI shown in
is
displayed with the default settings read from the device. The hardware and software are now ready for
testing. For serial interface operation, simply click on the switches, up/down arrows, etc.., to select the
desired settings of the DAC5687. If there is a problem with the communication, such as the EVM is not
powered on or the parallel port cable is not connected, an error message will be displayed instructing the
user to correct the problem. Once corrected, hit the "Read All" button, located in the lower right corner of
the GUI, to read the default settings of the device.
Figure 1. Serial Interface GUI
For normal operation, the user needs only to select values and switches as desired. The values are
automatically sent to the device and read back to verify their configuration.
10
DAC5687 EVM
SLWU017B – APRIL 2005 – Revised March 2007
