Azoteq IQ Switch ProxFusion Series User manual

IQ Switch®
ProxFusion®Series
IQS7223C Setup Guide
The purpose of this document is to guide the designer in setting up the IQS7223C for capacitive
proximity detection using the ProxBox demonstration device.
Contents
1 Introduction 2
2 Getting Started 2
2.1 Step 1: GUI Software Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.2 Step 2: Hardware Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2.3 Step 3: PC Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.4 Step 4: Initiate DUT Communication (Streaming) . . . . . . . . . . . . . . . . . . . . 5
2.5 Step 5: DUT Start-up and Initialisation . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.6 Step 6: Import Device Configuration (Optional) . . . . . . . . . . . . . . . . . . . . . 6
2.7 Step 7: Export Device Configuration (Optional) . . . . . . . . . . . . . . . . . . . . . 6
3 GUI Overview 8
4 Application Example 11
4.1 Channel Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Sensitivity Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.3 Threshold Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4 Noise Suppression . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
5 Conclusion 15
6 Revision History 16
Copyright ©Azoteq 2023
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IQS7223C Setup Guide
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IQ Switch®
ProxFusion®Series
1 Introduction
The purpose of this document is to provide a brief introduction to the initial configuration of the
IQS7223C using the Azoteq IQS7223C graphical user interface (GUI) PC software. The designer
may configure the IC via the GUI software for a specific application and evaluate the performance in
real-time. Note that this document is not intended to discuss or address all applications, but rather
to provide the user with the necessary configuration, debugging, data logging and header file export
knowledge of the GUI software to address their unique application. Furthermore, the scope of this
document is limited to the configuration of the IQS7223C using the appropriate and latest Azoteq
IQS7223C GUI PC software. For guidelines on the hardware and electrode design, please refer to
the applicable application notes. For IC-specific information, operation, and memory map details,
please refer to the IQS7223C datasheet.
2 Getting Started
This section describes the process of initial device set-up before application-specific tuning.
2.1 Step 1: GUI Software Installation
Install the Azoteq IQS7223C GUI using the ’Azoteq IQS7223C Setup.exe’ file and launch the software.
The following window will appear upon successful launch:
Figure 2.1: Main Window of the Azoteq IQS7223C GUI
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2.2 Step 2: Hardware Connections
Connect your PC to the Azoteq configuration debug and display tool CT210A using a standard USB-
micro data cable. The device under test (DUT), being either an IQS7223C EV-kit or an application
PCBA with the device and required passives mounted on, can be interfaced with a suitable 20-to-10-
pin ribbon cable connection (or application-specific connections) as shown in the below picture.
Figure 2.2: Hardware Connection for Streaming and Testing
Connect the application hardware’s power supply (VDD), ground (GND), I2C (SDA and SCL) as well
as the data ready interrupt signal (RDY) signal traces to the CT210A USB dongle’s pins as shown in
the pin-out table numbered and colour coded accordingly to Figure 2.3 below.
Table 2.1: CT210A Pin-out
IQS Pins CT210A Pins
GND Pin 1
VDD Pin 3
SDA Pin 7
SCL Pin 9
RDY Pin 10
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
GND
VDD
SDA
SCL
RDY
Figure 2.3: CT210A Power, I2C And RDY Connections
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2.3 Step 3: PC Connection
After connecting the CT210A device to the computer via a USB port and micro-USB data cable, the
GUI software will automatically install drivers if needed and verify their connection and firmware by
displaying the CT210A’s device ID and the appropriate ‘Device Connected’ information message in
the configuration tool manager section as indicated in the red block:
Figure 2.4: CT210A Recognition and Connection
Note: If the connected CT210A device firmware is out of date, an ‘UPDATE AVAILABLE’ button should
automatically appear next to the device enumeration. This button may then be clicked to launch the
appropriate CT Firmware upgrade tool to update the firmware as needed. For the image displayed in
Figure 2.5 below the CT210A connected was already up to date with the latest firmware and thus not
requiring an update.
Figure 2.5: CT210A Firmware Upgrader
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2.4 Step 4: Initiate DUT Communication (Streaming)
Click on ’START STREAMING’ to initialize the serial connection to the DUT. Additional information
messages will appear as listed and shown below, providing the following information:
>Power status
>I2C address
>Device version information
>Settings and streaming confirmations or errors as applicable
Figure 2.6: Message Dialogue Results From A Successful DUT Connection
If the above messages do not appear, please verify the device connection, the IQS part and version
numbers.
2.5 Step 5: DUT Start-up and Initialisation
Click on ’ACK RESET’ as shown in Figure 2.7. Bars will appear on Channels 0, 1, 2 and 3:
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IQ Switch®
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Figure 2.7: Initial Settings Stream From DUT After Reset
The device may now be configured further by either loading pre-configured settings (in a .h - header
file format) or selecting the ‘USER SETTINGS’ button to open the pop-up window with the settings
organised in menu tabs. Refer to section 4 for more detail.
Note: Only a single instance of the GUI software may run at any given moment and therefore, only
one device can be streamed at a time. Opening multiple instances of the GUI (or other Azoteq PC
software and tools) will lead to program and streaming malfunctions.
2.6 Step 6: Import Device Configuration (Optional)
If the device was previously configured and an associated .h-file was exported from the GUI, the
file may now be imported into the GUI using the ’IMPORT H FILE’ button. Additional information
messages will be provided to confirm that the file has been imported correctly:
Figure 2.8: Importing a Predefined Configuration
2.7 Step 7: Export Device Configuration (Optional)
After the DUT has been configured, the new settings may be exported for safe-keeping, sharing or
re-use at a later stage or on another device. The settings are exported as a .h-header file using the
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‘EXPORT H FILE’ button. Take care to save the new settings file with an appropriately descriptive
name and file location as intended.
Figure 2.9: Exporting a Defined Configuration
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3 GUI Overview
The IQS7223C graphical user interface (GUI) software allows the user to test, configure and export
settings files for the IQS7223C IC. Figure 3.1 illustrates the main window and components of the GUI.
Figure 3.1: Main Window Sections of the Azoteq IQS7223C GUI
The description of each numbered item in Fig. 3.1 is as follows.
1. Configuration Tool Manager - Allows for general configuration tool hardware recognition, con-
trol and feedback in the GUI. The top drop-down box will list the configuration tool (CT or DS)
devices connected to the PC that are available for use. If a valid selection is made, the ‘START
STREAMING’ button may be used to initiate I2C communication and start a data ‘stream’ from
the DUT. If the stream was initiated successfully, the button will change to ‘PAUSE STREAMING’
which can temporarily pause the I2C activity from the configuration tool’s side and ignore any
DUT RDY signals. The ‘STOP STREAMING’ button in turn is used to terminate I2C communi-
cation. The text box will provide general information on the I2C connection, tasks completed,
as well as error messages in case of any unsuccessful attempts or lost communications. The
logging button may be used to capture/record sensor register data and export the streaming
session’s data to a .csv-file. The ‘IMPORT H FILE’ button allows the user to load a previously
configured settings file (.h-file) to the DUT. The ‘EXPORT H FILE’ button will create/overwrite
and save a new .h-file using the current configuration settings present on the DUT.
2. Settings Tree - All available device settings may be found here. The ‘USER SETTINGS’ button
will open a new, dedicated pop-up window with settings in a tabular layout for easier navigation
and display. The settings tree shown below the buttons contains the same settings, as well as
some hidden engineering settings in numerical order according to the memory map addresses.
It is advised that the user utilise the ‘USER SETTINGS’ interface as the primary configuration
portal. Except for some settings described later in this document, the settings tree should not
be used without the support of an Azoteq or distributor FAE.
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3. System Commands Section - The ‘ACK RESET’ button will issue a reset acknowledgement
command to the IC as confirmation of coming from a power-on / reset state (with default device
settings populated). The ‘SOFT RESET’ button will command the DUT to perform a soft reboot.
The ‘ATI ALL AND READ’ button will command the DUT to use its automatic tuning implemen-
tation (ATI) algorithm for sensor re-calibration (please refer to the IQS7223C datasheet for more
information). The ‘RESEED’ button commands the DUT to seed/set its Long Term Average
(LTA) filtered values equal to its current count values. Note: these operations apply globally to
all channels or the device as a whole.
4. Bar And Scope View - This area will visually display bar graphs of the sensor counts and LTA
signals as configured for every channel. The decimal representation of the current values is
displayed below each channel. The results may be viewed on the bars (by selecting the primary
‘BARS’ tab) or the same data stream can be plotted as lines over time on a secondary scope
view (by selecting the ’SCOPE’ tab). The ‘Counts’ value represents the filtered signal input
from the device’s sensors. The ‘LTA’ is the long-term average of the counts and acts as a slow
adjusting baseline used as a reference to detect any quick deviation in Counts. The channel’s
Counts and LTA line plots can be selected or deselected for display to make the scope view less
cluttered. Adjusting the number of points on the x-axis requires that one presses the ‘RESET X
AXIS’ to apply/update the scope view. For scope navigational control explanations please click
on the ‘HELP’ button.
Figure 3.2: Scope View of the IQS7223C GUI (Alternative Display for Bar View)
5. Events Flags Section - Provides an overview of various events that are triggered. Individual
blocks will light up for event occurrences or trigger activation states and a text log of specific
event selections can also be evaluated in an event log (timestamped text) terminal.
>Events
•Device Events
∗ATI. Active when ATI routine execution starts.
∗Power Mode. Active when power mode switches.
∗Channel Filter-halt. Active when a channel enters or exits a filter halt state (indi-
cated by a bar graph changing from green to blue).
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IQ Switch®
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∗Channel Activation. Active when a channel enters activation state (user is de-
tected, indicated by a bar graph changing from blue to orange).
∗Wear Release. Active when the DUT exists wear state.
∗Wear. Active when the DUT enters wear state
∗Crosscheck Failed. Active when in-wear ATI routine was unsuccessful.
•Device Status
∗ATI Active. Active until ATI routine execution is complete. Similar to the ATI flag
in the ’Device events’ section.
∗ATI Error. Active when ATI routine was attempted but failed. The most common
cause for this error is a too-sensitive channel configuration.
∗Debounce Active. Active when the de-bounce routine is executed. This will be
dependent on the number of debounce cycles selected in a channel’s ’Filter Halt’
settings.
∗Device Reset. Active after a device reset. Remains active until reset is acknowl-
edged with the ’ACK RESET’ button.
•PM and Wear State
∗In Wear. This is the main ’In Wear’ status flag. It remains active as long as a
successful wear state is detected. Deactivates upon a successful wear release
event.
•Power Mode
∗Normal. Active while the DUT is in Normal power (NP) mode.
∗Low. Active while the DUT is in Low power (LP) mode.
∗ULP. Active while the DUT is in Ultra low power (ULP) mode.
∗Halt. DUT is in halt mode; communication and sampling are seized.
•Movement UI
∗Settled. Active while the DUT detects no movement as derived from a low vari-
ance/gradient on CH0 and the wear settle time has passed. Pre-cursor to the
activation of the ’In Wear’ flag.
∗Movement. Active while the DUT detects movement, denoted by high variance/-
gradient events on CH0.
•Filt Halt States
∗CH0 Filt Halt. Active while CH0’s LTA filter is halted.
∗CH1 Filt Halt. Active while CH1’s LTA filter is halted.
∗CH2 Filt Halt. Active while CH2’s LTA filter is halted.
∗CH3 Filt Halt. Active while CH3’s LTA filter is halted.
•Activation States
∗CH0 Activation. Active while CH0 is activated.
∗CH1 Activation. Active while CH1 is activated.
∗CH2 Activation. Active while CH2 is activated.
∗CH3 Activation. Active while CH3 is activated.
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