NXP Semiconductors PCA9846PW-ARD, Руководство пользователя, Страница: 21 / 27

NXP Semiconductors
UM11759
PCA9846PW-ARD evaluation board
7 GUI description
A GUI application is available for the three EVK boards from NXP Semiconductors.
The application is common for all three EVKs described in Section 6 , and the following
development boards: PCA9617ADP-ARD and PCA9846PW-ARD.
This section describes the GUI application and how the user can control the
PCA9846PW-ARD expansion board from the graphical interface. First, install the GUI
package and software on the PC (Windows 10). Refer to UM11581
[12]
Once installation is complete, ensure that one of the mentioned three EVKs with attached
PCA9846PW-ARD expansion board is connected to the PC and powered on. Open
NXP_GUI (PCA9617A, PCA9846) GUI application. An interface will appear as is shown
in Figure 16 .
The GUI application starts with the Settings tab (marked in Figure 16 with a red arrow).
The left side of the window displays Board settings. The section provides the following
settings:
• Select EVK: Displays the list of EVKs. Selecting a wrong EVK board causes the
connection to fail. A pop-up window with the message, “Unable to Connect with EVK,”
will appear on the screen.
• Select COM port:
Displays port selected for communication. The port is automatically
selected by the system. Figure 16 shows COM 5.
• Select Board: Allows the user to select the correct expansion board. Tthe application
can support two different boards. In Figure 16 , the selected board is PCA9846PW.
Selecting a wrong expansion board causes the connection to fail.
Assuming the correct parameters are chosen, clicking the Connect button establishes
the connection with the EVK. At the bottom of the GUI window, a status bar shows in real
time the status regarding connection between PC and the EVK.
The Device setting section is located at the right of the screen. The following settings are
provided:
• I2C Frequency: Displays the I
2
C-bus clock frequency. The drop-down box allows for
selection of one of the three values: 100 kHz (default value), 400 kHz and 1 MHz.
• I2C Address Selection : Allows the user to select the hardware address of PCA9846A.
From drop-down lists one of the values that can be selected: 0 (default), 1, SDA,
SCL. Note the selected device address must be identical to the selected address from
jumpers J12 and J13 on the PCA9846PW-ARD expansion board. Use Table 4 to select
the correct I
2
C address. Refer to the Device address section in PCA9846
[13]
. Any
difference between the two addresses will cause communication between the PC and
the expansion board to fail.
The Set button writes the new values in the internal registers of PCA9846A IC. When
the Set button is pressed, a pop-up window with the message “Setting device set
successfully” will appear on the screen. Click OK to close the pop-up window.
UM11759 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2022. All rights reserved.
User manual Rev. 1 — 6 June 2022
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