Datasheet

7.4 Using the EVM GUI
7.4.1 General GUI Information
7.4.2 GUI Control Fields and Buttons
www.ti.com EVM Feature Details
The TPS2459 EVM GUI comes packaged in an installer script/license agreement utility. Follow the
instruction in Section 6.1 GUI Installation to Install the GUI to the target PC/laptop.
Once installed, and depending on the install options selected by the user, the GUI can be launced either
from the TPS2459 EVM GUI program group in the Windows Start menu, or from the desk-top icon. At
start-up, the GUI automatically scans the legitimate address space of the TPS2459 for any devices on the
bus. If one or more addreses are discovered, the numerically lowest address is displayed in the “at
address:” field at the top of the GUI screen. This device becomes the current device for all I
2
C read and
write transactions. the GUI then polls the entire register set of this device, and populates the fields with the
current contents.
The GUI is divided into two main panels of information display, AMC and SYSTEM. AMC isaplays and
modifies rail-specific information of the AMC slot being contolled. It is in turn divided into two sub-panels:
CONTROL, user access to register control bits and fields of the selected device, and STATUS, status
information from the read-only registers of the TPS2459. Note that these settings and values are specific
to the 12-V or 3.3-V channel. The SYSTEM panel at the bottom of the GUI display provides access to
“higher level” functions, in that they apply to both channels of the device, or control GUI operation.
With a few exceptions, the GUI generally uses a two-color coding scheme to provide quick visual
feedback to the user of control and status information. A red button background color is used to indicate
DISABLED, in the case of control, or OFF or FAULT, in the case of status information. A green
background is used to signal ENABLED, ON or GOOD (i.e., no fault). Fields which do not have a binary
value set are coded with either a blue or grey button background. All the control and some status buttons
also feature a text label reflecting the current setting.
The GUI has two status update modes, automatic and manual. The current mode is indicated in the
REFRESH block in the lower-right corner of the SYSTEM panel. By default, the GUI starts up in AUTO
mode. To change to manual mode, check the "Manual Refresh" option under the Tools pull-down menu at
the top of the GUI window. Un-checking the "Manual Refresh" option will enter automatic mode. In manual
refresh mode, the REFRESH, AMC STATUS button displays UPDATE. Click the UPDATE button to obtain
a status read of the of the device whose address is displayed at the top of the window. Regardless of
mode, REFRESH only polls the three status registers of the device, registers 7, 8 and 9. A status read
action decodes the returned information from the TPS2459, and populates the GUI fields accordingly.
AUTO REFRESH polls the device at about a 1-Hz rate.
Write transactions to the current device are only triggered by a GUI button or field mouse click. Binary slot
(e.g., “AMC”) and SYSTEM control buttons (e.g., 12V PASS FET, 3.3V PASS/BLK FET) are click to
toggle. Numeric fields are click to send the displayed field contents. When a control button or field is
clicked on, the new register contents are formed from the value(s) currently displayed on the GUI screen,
and the new value is written to the correspond device register.
Table 9 lists the primary controls for turning the output rails on and off, in the AMC CONTROL panel.
Table 9. Output Rails Primary Controls
DEVICE BIT
GUI BUTTON OPERATION
(Register[Bit])
12V PASS FET R4[5] Enable/disable 12-V pass (and block) FET’s.
12V BLK FET R3[7] Enable/disable 12-V block (i.e, OR’ing) FET
3.3V PASS/BLK Enable/disable internal 3.3-V FET.
R5[5]
FET
SLUU349 – March 2009 TPS2459 Full-Featured AdvancedMC™ Slot Controller Evaluation Module 17
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