Texas Instruments TLV320AIC12KEVM-K, Руководство пользователя

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6.5 Indicators and Main Screen Controls
6.6 Information Tab
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Kit Operation
Figure 2 illustrates the indicators and the main screen controls near the top of the software screen display,
and a large tabbed interface below. This section discusses the controls above this tabbed section.
At the top left of the screen is an Interface indicator. The TLV320AIC12K/14K has an I
2
C interface. The
indicator is lit after the program begins. Below the Interface indicator is the Device Connected indicator.
The TLV320AIC12K/14K Evaluation Tool detects whether or not the TLV320AIC12KEVM-K/14KEVM-K is
present. If the device is unplugged from the USB port or if the device driver is not installed properly, the
Device Connected indicator will turn red. Otherwise, it will turn green.
To the right of the Interface indicator is a group box called Firmware . This box indicates the product
identification of the USB device, so AIC12K/14K EVM should be displayed in the box labeled Located
On: . The version of the firmware appears in the Version box below this.
To the right, the next group box contains controls for resetting the TLV320AIC12K/14K. A software reset
can be done by writing to a register in the TLV320AIC12K/14K; the writing is accomplished by pushing the
button labeled
Software Reset . This button also resets to the default I
2
C address and refreshes the GUI's
register table and controls/indicators by reading all registers. The TLV320AIC12K/14K also may be reset
by toggling a GPIO pin on the USB-MODEVM, which is done by pushing the
Hardware Reset button.
CAUTION
In order to perform a hardware reset, the RESET jumper (W7) must be installed
and SW2-7 on the USB-MODEVM must be turned OFF. Failure to do either of
these steps results in not generating a hardware reset or causing unstable
operation of the EVM, which may require cycling power to the USB-MODEVM.
The ADC Overflow and DAC Overflow indicators light when the overflow flags are set in register 1 of the
TLV320AIC12K/14K. These indicators, as well as the other indicators on this panel, update only when
writing or reading registers, on resets or by pushing the
Refresh button. The Indicator Updates and
Control Updates buttons enable/disable updates of indicators and controls, respectively.
The information tab ( Figure 3 ) shows information for two TLV320AIC12KEVM-K/14KEVM-K hardware
configurations.
The USB-MODEVM Audio Interface Configuration allows audio data and I
2
C communication between
the host computer and the TLV320AIC12K/14K. SW2 on the USB-MODEVM must be configured as
shown in the left section of
Figure 3 .
SLAU229A – October 2007 – Revised June 2008 TLV320AIC12KEVM-K and TLV320AIC14KEVM-K User's Guide 11
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