CAP1xxx Evaluation Board User’s Guide
2013 Microchip Technology Inc. DS50002221A-page 1
1 Overview
CAP1xxx Evaluation Board User’s Guide
This document provides a description of the software and hardware used to demonstrate the features
TM
of the Microchip CAP1xxx Family of RightTouch
multiple-channel capacitive touch controllers and
LED drivers. Two evaluation boards are covered in this User's Manual. The CAP1188 evaluation board
contains the largest, full-featured version of the CAP11xx family. The other devices in this family are
the CAP1166, CAP1128, CAP1126, CAP1133, and CAP1106. Likewise, the CAP1298 evaluation board
contains the largest, full-featured version of the CAP12xx family. The other devices in this family are
the CAP1296, CAP1293, CAP1208, CAP1206, and CAP1203.
1.1 References
Readers should be familiar with or have access to the datasheet for the device and the schematic for
the evaluation board.
The datasheet is included with the CD provided with the evaluation board, and can also be
downloaded from the Microchip website at http://www.microchip.com/mtouch.
The schematic is included with the CD provided with the evaluation board.
1.2 The RightTouch Evaluation System
The evaluation system has three major parts, as shown in Figure 1.1:
Customer-provided Windows PC
CAP1xxx graphical user interface (GUI) software (based on National Instruments
software)
CAP1xxx Evaluation Board - either the CAP1188 or CAP1298 versions (see Figure 1.2)
TM
LabVIEWTM
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CAP1xxx Evaluation Board User’s Guide
CAP1188 Device
Capacitive
Sensors
LED
Drivers
PIC16F1454
CAP11xx
Evaluation
Board
I2C
PC
with CAP1xxx GUI
USB
CAP1298 Device
Capacitive
Sensors
LED
Drivers
PIC16F1459
CAP12xx
Evaluation
Board
I2C
PC
with CAP1xxx GUI
USB
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Figure 1.1 CAP1xxx Evaluation System
CAP1xxx Evaluation Board User’s Guide
Figure 1.2 CAP1xxx Evaluation Board Top View
1.2.1 Capacitive Sensing Device on the Evaluation Board
The CAP1188 device was chosen for the evaluation board because it has the most sensors and LEDs
in the CAP11xx family.
Note: The CAP1114 and CAP1214 devices, each with 14 sensors and 11 LED drivers, contain
additional features such as slider support which will be highlighted in their own evaluation
board.
The CAP1298 device was chosen for the evaluation board because it is the superset device in the
family, meaning it has the most sensors and features in the CAP12xx family including the signal guard.
The CAP1188, CAP1166, CAP1128, CAP1126, CAP1133, and CAP1106 are similar, with the exception
of the number of capacitive sensor inputs and LED drivers, as shown in Ta bl e 1 . 1.
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Table 1.1 CAP11xx Device Differentiation
DEVICE NUMBER OF LED DRIVERS
NUMBER OF CAPACITIVE
SENSOR INPUTS
CAP1133 3 3
CAP1106 0 6
CAP1126 2 6
CAP1166 6 6
CAP1128 2 8
CAP1188 8 8
The CAP1298, CAP1296, CAP1293, CAP1208, CAP1206, and CAP1203 part of the same family and
so have a very similar feature set, with the major exception being of the number of capacitive sensor
inputs and the guard output, as shown in Ta bl e 1 .2 .
Table 1.2 CAP12xx Family Device Differentiation
DEVICE
NUMBER OF CAPACITIVE
SENSORS
GUARD
CAP1203 3 No
CAP1293 3 Yes
CAP1206 6 No
CAP1296 6 Yes
CAP1208 8 No
CAP1298 8 Yes
1.2.2 Major Components on the Evaluation Board
Figure 1.3 shows the component side of the CAP1188 evaluation board and highlights some of the
important components.
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CAP1xxx Evaluation Board User’s Guide
PIC16F1455
USB
5V to 3.3V
Regulator
PIC16F1455
Programming
Header
CAP1188
8-pin
Communication
Header
PIC16F1459
USB
PIC16F1459
Programming
Header
CAP1298
8-pin
Communication
Header
Figure 1.3 Evaluation Board Component Side View
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2 Software and Hardware Installation
To begin using the CAP1xxx evaluation board, you only need to supply power by plugging in the USB
connector. However, in order to further evaluate the features of the CAP device, the CAP1xxx GUI
must be installed on a Windows-based computer with a USB port.
2.1 GUI Software Installation
Begin by inserting the CD provided with the evaluation board into the computer. Run the Setup.exe
program located in the root directory of the CD. This steps through the CAP1xxx GUI installation, which
takes less than a minute. Figure 2.1 shows the initial installation screen, which displays briefly as the
setup program loads.
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Figure 2.1 Software Installation Step 1
CAP1xxx Evaluation Board User’s Guide
Click Next in the Destination Directory window, shown in Figure 2.2. For proper operation, the files
must be installed in the default locations. The default location for the software files is C:\Program
Files\Microchip\Microchip CAP1xxx GUI and for the LabVIEWTM software is C:\Program Files\National
Instruments.
Figure 2.2 Software Installation Step 2
In order to use the LabVIEWTM software, the license agreement must be accepted (see Figure 2.3).
Figure 2.3 Software Installation Step 3
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Follow the on-screen instructions to complete the installation. During installation, shortcuts will be
created on the Windows Start Menu and on the desktop. When installation is complete, the program
will automatically run and begin looking for the PIC16F145x USB to I2C bridge. (see Figure 2.4).
Figure 2.4 RightTouch Evaluation Software Start-up Screen
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2.2 USB Bridge Installation
To complete the installation, connect the USB mini connector to the EVB and the standard USB
connector to any available USB port on the PC. If the USB Bridge driver has not previously been
installed on the selected USB port, the “Find New Hardware” wizard will pop up on the PC’s screen.
Follow the on-screen instructions to complete the installation process. See Figure 2.5 through
Figure 2.8 for a step by step view of the installation.
Once installation of the USB Bridge is complete, the GUI software will begin communications with the
device on the EVB.
CAP1xxx Evaluation Board User’s Guide
Figure 2.5 USB Bridge Driver Installation Step 1
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Figure 2.6 USB Bridge Driver Installation Step 2
Figure 2.7 USB Bridge Driver Installation Step 3
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CAP1xxx Evaluation Board User’s Guide
Figure 2.8 USB Bridge Driver Installation Step 4
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3 Quick Start Window
The Quick Start Window provides the same information as the Advanced Window, but reduces the
number of options for a more manageable initial user experience. For more information on what
options are provided on the Quick Start Window and how to use them, refer to the CAP1xxx Quick
Start Guide provided with the CAP1xxx CD.
4 Advanced Tab
4.1 Default Conditions
Communications begin as soon as the CAP1xxx GUI software detects the presence of the CAP1xxx
evaluation board. The GUI then reconfigures the CAP1xxx evaluation board with predetermined values
specific to the evaluation board's hardware. Figure 4.1 shows the default GUI for the CAP1188
evaluation board.
Figure 4.1 Default State of RightTouch GUI with the CAP1188 Evaluation Board
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4.2 Tips for Using the RightTouch Evaluation System
For many items on the GUI control panels, the register address is listed after the control name.
After communications are established between the GUI and the evaluation board, the GUI will
reconfigure the device. Users can save setting configurations to user-named files which can be
reloaded at any time for quick re-configuration (see Section 4.4, "Save/Load Tab").
QuickLoad options are provided on the right to quickly change the evaluation board's behavior
between 'Buttons', 'Proximity', and 'Metal over Capacitive'.
4.2.1 Numbering Systems Views
Some control panels allow values to be displayed using different numbering systems: Decimal, Hex,
Octal, Binary or SI Notation.
To view a value using a different numbering system, click the indicator to the left of the value in the
cell, shown circled in Figure 4.2.
Figure 4.2 Numbering System Indicators
4.2.2 Keyboard Shortcuts
Some GUI controls have keyboard shortcuts, as shown in Table 4.1.
Table 4.1 CAP1188 Family EVB GUI Keyboard Shortcuts
GUI CONTROL SHORTCUT CONTROL DESCRIPTION
Run CTRL + R Section 4.5.1, "Stop and Run Buttons"
Load Buttons file F1 Section 4.5.5, "QuickLoad Buttons"
Load Proximity file F2 Section 4.5.5, "QuickLoad Buttons"
Load MOC file F3 Section 4.5.5, "QuickLoad Buttons"
Load Custom1 file F4 Section 4.5.5, "QuickLoad Buttons"
Load Custom2 file F5 Section 4.5.5, "QuickLoad Buttons"
Load Defaults F6 Section 4.5.6, "Defaults Button"
Update All Registers F7 Section 4.5.4, "Update All Registers"
Calibration Activate All F8 Section 4.9, "Sensitivity Control Panel"
Stop F12 Section 4.5.1, "Stop and Run Buttons"
4.3 Device Information and Datasheet Link
In addition to the device name lighting up on the evaluation board and displaying in the software title
bar, the Device Information Control Panel also shows the device that has been populated on the
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evaluation board. Figure 4.3 shows the Device Information Control Panel for the CAP1188 evaluation
board.. This control panel also shows the values from reading the Product ID Register (FDh) and
Revision Register (FFh) on the device.
Clicking the Datasheet button opens a browser window that will display a PDF file of the datasheet of
the connected device.
4.4 Save/Load Tab
The Save/Load tab, located in the lower left corner of the Advanced Tab and shown in Figure 4.4,
allows the user to save all the settings that have been configured for the device to allow quick reconfiguration at any time.
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Figure 4.3 Device Information Control Panel
CAP1xxx Evaluation Board User’s Guide
Figure 4.4 Save/Load Tab
To save device configuration settings:
Using the GUI, configure the CAP1xxx as desired.
Select the Save/Load tab.
Type in a path, or click the folder icon to browse to your desired save location.
Click the 'SAVE' switch to store the configuration.
Notes:
1. The file should be named with the extension '.txt' or similar plain-text file format. The data is saved
in two columns separated by tabs. The first column is the register's address, and the second
column is the register's value.
2. If a file with the same name already exists, the file will be overwritten and old data will be lost.
3. When a file is loaded, the Auto Clear INT button is disabled. Click it to re-enable auto-clearing of
interrupts (see Section 4.5.2, "Auto Clear INT").
Once a file is saved, it can be recalled at any time by selecting the file in the data path window and
clicking the “LOAD” switch. The file can also be linked to a QuickLoad button (see Section 4.5.5,
"QuickLoad Buttons").
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The evaluation board GUI comes with several sample configuration files which vary the settings for
different functions.
4.5 Communications Status and Control Panel
Along the right side of the GUI is the control panel shown in Figure 4.5. This is the Communications
Status and Control Panel, which controls and displays the status of the communications between the
GUI software and the evaluation board and includes buttons for loading configurations. This control
panel is always displayed.
Figure 4.5 Communications Status and Control Panel
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4.5.1 Stop and Run Buttons
The STOP button, on the Panel shown in Figure 4.5, halts GUI software communication with the
evaluation board. When this button is clicked, the Run button, which has an arrow on it, displays below
the menu bar, as shown in Figure 4.6.
To restart communications between the software and the evaluation board, click the Run button. The
arrow button disappears when communications resume.
To close the program, use the red X in the upper right corner of the window.
CAP1xxx Evaluation Board User’s Guide
Figure 4.6 Run Button
4.5.2 Auto Clear INT
When the Auto Clear INT button is enabled (dark gray), the INT bit, ALERT pin, and status indicators
are continuously cleared. When the Auto Clear INT button is disabled (light gray), the user must
manually clear interrupts by clicking the INT indicator on the Status and Control Panel or the Auto Clear
INT button. This is shown in Figure 4.5 at the top of the red highlighted box.
4.5.3 Deep Sleep Indicator
The Deep Sleep indicator located below the Auto Clear INT toggle switch in the upper right and shown
in Figure 4.5, indicates whether the device is in the Deep Sleep state. During normal operation, this
indicator is dark. When the device is placed into the Deep Sleep state, this indicator turns blue (or a
lighter color, depending on the PC settings).
4.5.4 Update All Registers
The Update All Registers button shown in Figure 4.5, will update all values displayed on the GUI
control panels to reflect the current device registers. In order to keep control panel response time
reasonable, only a few of the device registers are read and continuously updated during normal
operation. Clicking the Update All Registers button will automatically cycle refreshing all controls and
readings on the control panel.
The keyboard shortcut is F7.
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4.5.5 QuickLoad Buttons
The QuickLoad buttons, on the Panel shown in Figure 4.5, allow the user to quickly load configuration
files (see Section 4.4, "Save/Load Tab").
There are five QuickLoad buttons available. Each button is linked to a “.txt” file in your installation
directory that has the filename listed above the button. To link the button to a different file, type the
filename (without the extension) in the box above the button, then click off the field. Figure 4.7 shows
new names for the first two buttons. To load the file, click the button or press the shortcut key listed
next to the button.
The 'Buttons' QuickLoad option will set up the CAP1xxx evaluation board for each sensor to behave
as normal touch buttons. Due to the thin front cover of the evaluation boards, this means the gain is
set to the lowest option, and the sensitivity option is greatly reduced from the maximum.
The 'Proximity' QuickLoad option will set up the CAP1xxx evaluation board for all of the sensors to
detect the proximity of a hand approaching. The gain and sensitivity, in this case, are set very high.
Using this configuration, you can see how the size of the sensors will affect the possible range of
proximity detection.
4.5.6 Defaults Button
The Defaults button, toward the bottom of the red highlighted panel shown in Figure 4.5, loads the
default register settings on the device as described in the datasheet.
The keyboard shortcut is F6.
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Figure 4.7 QuickLoad Buttons
4.5.7 COM Indicator
The COM indicator, toward the bottom of the Panel shown in Figure 4.5, indicates the status of
communications over the I2C. During normal operation, the COM indicator is dark. If I2C
communications fail, the COM indicator turns red.
4.5.8 I2C Address
I2C Address, at the bottom of the red highlighted panel shown in Figure 4.5, indicates the 2C address
of the device.
4.6 Delta Counts Tab
The Delta Counts tab on the Main window and in the Quick Start window shown in Figure 4.8, displays
the delta counts of the capacitive sensor channels. The Delta Count Register address for each sensor
input is listed below the sensor number.
CAP1xxx Evaluation Board User’s Guide
When the Display Value switch is set to Delta, the number cell below each indicator bar displays the
least significant byte of that channel’s current delta count. When the Display Value switch is set to Max,
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Figure 4.8 Delta Counts Tab
CAP1xxx Evaluation Board User’s Guide
the number cell below each indicator bar displays the max delta count for the channel (when the Max
Enable switch is up). The outline on the top of each indicator bar shows the threshold of the sensor
channel. As a sensor pad is being approached and touched, a black bar displays the actual delta
count.
The Max Enable switch, when set in the upper position, turns on display of thin blue bars that indicate
the maximum delta count for each channel. These bars display the maximum delta count until the Max
Enable switch is set to the lower, “Clear” position.
Settings that control the threshold values are covered in Section 4.9, "Sensitivity Control Panel".
All numbers (except register addresses) on this tab are displayed in decimal format.
4.7 Base Counts Tab
The Base Counts tab on the Main window, shown in Figure 4.9, displays Base, Delta, Current Count,
Calibration Factor, and Capacitance in a register format and includes a Sensitivity control. This tab can
be used to check the sensors' calibration values.
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Figure 4.9 Base Counts Tab
The formats of values on this control panel can be changed to Hexadecimal, Octal, Binary or SI
Notation by clicking the tap in the front of each data cell (see Section 4.2.1, "Numbering Systems
Views").
The Sensitivity Control section affects the Sensitivity Control Register (1Fh). The Base Shift controls
the scaling and data presentation of the Base Count registers. The higher the value of these bits, the
larger the range and the lower the resolution of the data presented. It should not be necessary to
modify this number.
The Sensitivity drop-down list allows update of the sensitivity multiplier, which controls sensitivity of a
touch detection. This value can also be updated using the Sensitivity bar in the Sensitivity Control
Panel (see Figure 4.11, "Sensitivity Control Panel").
4.8 Register Data Tab
The Register Data tab in the Advanced window shown in Figure 4.10, displays a list of all registers
and allows the user to directly write to any register of the device.
CAP1xxx Evaluation Board User’s Guide
The All Raw Device Registers display shows a scrollable list of registers and their current values. It is
important to note that not all addresses are physical memory locations on the device; these registers
will read “0”. Likewise, some registers shown that are undocumented in the datasheet may have data.
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Figure 4.10 Raw Data Tab
CAP1xxx Evaluation Board User’s Guide
Editing these registers can cause unexpected results. If a mistake is made while making a manual edit
in this window, it may be necessary to revert to the defaults or a stored configuration.
The Single Byte Register Access control allows direct write to any register within the device.
The formats of address and data on this control panel are hexadecimal by default, with the option to
change to Decimal, Octal, Binary or SI Notation (see Section 4.2.1, "Numbering Systems Views").
4.9 Sensitivity Control Panel
The Sensitivity Control Panel provides controls for capacitive sensor input sensitivity and on-demand
calibration, as shown in Figure 4.11.
The Sensitivity bar affects the Sensitivity Control Register (1Fh), which controls the amount of
capacitance change required to affect the sensor's signal.. Clicking the bar changes the setting. The
value selected is also reflected in the Sensitivity cell on the Base Counts Tab.
Occasionally it is desirable to force recalibration of the sensor inputs. Clicking the Calibration Activate
switch will recalibrate the sensor inputs.
Note: This is equivalent to writing 0xFF to the Calibration Activate register (26h).
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Figure 4.11 Sensitivity Control Panel
4.10 Thresholds Control Panel
The Thresholds Control Panel, shown in Figure 4.12, contains 4 tabs which are described below.
CAP1xxx Evaluation Board User’s Guide
Figure 4.12 Thresholds Control Panel - Active Tab Displayed
4.10.1 Active Tab
The Active tab of the Advanced window's Thresholds section, shown in Figure 4.12, contains the
sensor input thresholds (registers 30h - 37h) that define the delta count level at which touches are
reported when the device is in the Fully Active state.
To quickly set all Active tab sensor input thresholds to the same value, ensure the 'Sensor 1 Updates
All' switch is in the up position, enter the desired value into the Sensor 1 data cell, and then click out
of the cell. To individually set Active tab sensor input thresholds, click the 'Sensor 1 Updates All' switch
so it’s in the down position and displays the label “Individual Sensor Updates”.
4.10.2 Standby Tab
The Standby tab of the Advanced window's Thresholds section shown in Figure 4.13, contains sensor
input controls for the Standby power state.
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Figure 4.13 Thresholds Control Panel - Standby Tab Displayed
The Standby Threshold defines the delta count threshold level for all sensor inputs when the device is
in the Standby state. There is also a Standby Sensitivity bar that affects the Standby Sensitivity
Register (42h).
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4.10.3 Noise Tab
The Noise tab of the Main window's Thresholds section shown in Figure 4.14, contains the threshold
used to detect noise. The Sensor Noise Thresholds are a percentage of the Sensor Thresholds on the
Active tab.
CAP1xxx Evaluation Board User’s Guide
Figure 4.14 Thresholds Control Panel - Noise Tab Displayed
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4.11 Recalibration Configuration Control Panel
On the Advanced window below the Thresholds section is the Recalibration Configuration section
shown in Figure 4.15.
Figure 4.15 Recalibration Configuration Control Panel
The 'Calibration #samples / time' drop-down menu allows selection of the update time and number of
samples related to the recalibration routine. Negative delta count allows selection of the number of
consecutive negative delta counts necessary to trigger a digital recalibration. Both of these controls
affect the Recalibration Configuration Register (2Fh).
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4.12 Status and Control Panel
The Status and Control section of the Main window shown in Figure 4.16, displays the current Sensor
Status register value and the General Status register. It also provides control and display of the device
interrupt, power states, and advanced configuration options.
CAP1xxx Evaluation Board User’s Guide
When the sensor's signal exceeds the threshold, the Sensor Status section will change the
corresponding square button to a dark square. Depending on configuration settings, indicators in the
General Status section may turn blue (or a lighter color, depending on the PC settings) when the
criteria for the indicator is met.
If the Auto Clear INT button on the Panel (see Section 4.5, "Communications Status and Control
Panel") is enabled (dark gray), the INT indicator, General Status section, and the Sensor Status section
are continuously cleared. This allows the user to see only the current state of the device.. If the Auto
Clear INT button is disabled (light gray), the user must manually clear interrupts by clicking the INT
indicator or the Auto Clear INT button. This allows for a more realistic demonstration of the behavior
of the device's registers between host reads and writes of the INT bit.
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Figure 4.16 Status and Control Panel
CAP1xxx Evaluation Board User’s Guide
4.12.1 Power States
Please refer to the device datasheet for details regarding the different power states. The software
switches work as follows:
The Standby switch toggles between the Standby and Fully Active states.
The Deep Sleep switch puts the device into the Deep Sleep state. To exit Deep Sleep, click
anywhere on the GUI to display the message shown in Figure 4.17. There is also a timeout that
will display the message shown in Figure 4.18.
Figure 4.17 Deep Sleep Message
Figure 4.18 Deep Sleep Timeout Message
4.12.2 Configuration and Configuration 2
The Configuration section of 'Status and Control' allows the user to enable and disable bits in the
Configuration Register (20h). The Configuration 2 section allows the user to enable and disable bits in
the Configuration 2 Register (44h). These registers control the general global functionality of the
device. Refer to the datasheet for details.
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4.13 Sensor Configuration Control Panel
The Sensor Configuration section shown in Figure 4.19, allows the user to adjust the configuration
registers for the sensors. These controls change the response of the sensors to suit the environment,
application, and desired response in the Fully Active and Standby states.
CAP1xxx Evaluation Board User’s Guide
Figure 4.19 Sensor Configuration Control Panel
The Sensor Configuration section contains options for the Averaging and Sampling Configuration
Register (24h), which adjust the averaging and cycle time for sensor inputs that are active in the Fully
Active state. The Standby Tab controls affect the Standby Configuration Register (41h), which controls
averaging and cycle time for sensor inputs that are active in the Standby state.
Controls in the Sensor Configuration section affect the Sensor Configuration Register (22h). Repeat
rate settings determine whether one or more interrupts are sent per sensor activation and the duration
between interrupts. Maximum duration settings determine maximum time a sensor can be activated
before the sensor input is recalibrated.
The M Press control affects the Sensor Configuration 2 Register (23h). The M Press setting delineates
the time duration difference between a touch versus a press-and-hold event. If the press is longer than
the M Press time, it is considered a press-and-hold.
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Controls in the Multiple Touch section affect the Multiple Touch Configuration Register (2Ah). Multiple
touch settings determine how simultaneous touches to multiple buttons .are handled. Remember to
check the 'Multiple Block Enable' box to enable this feature. In the actual device, the 'enable' bit must
also be set in the register to enable the feature.
Controls in the Repeat Rate Enable section affect the Repeat Rate Enable Register (28h). When
checked, the repeat rate defined in the Sensor Configuration section is enabled for the button.
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5 GUI Sensor Control Tab
The Sensor Control tab provides the detailed controls for individual sensor inputs. Figure 5.1 shows
the default view for the CAP1298 Evaluation Board.
CAP1xxx Evaluation Board User’s Guide
Figure 5.1 Sensor Control Tab for the CAP1188 Evaluation Board
The Sensor Control Panel has 2 sections: individual sensor inputs (see Section 4.1) and all sensor
inputs (see Section 5.1).
5.1 All Sensor Input Settings
The All Sensor Settings display, shown in Figure 5.2, has the controls for all the sensor inputs. A check
mark represents a ‘1’ in logic.
The 'Sensor Enable' column determines which sensors are scanned in Active mode.
The 'Sensor Interrupt' column determines which sensors produce an interrupt when a touch is
detected.
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The 'Standby Channel' column determines which sensors are scanned in Standby mode. For the
CAP12xx devices, this also determines which sensors will be scanned using the Combo Gain settings
when in Combo mode.
The 'Signal Guard Enable' column is only available on CAP129x devices and determines which
sensors will have the signal guard enabled during their scan.
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Figure 5.2 All Sensor Settings
5.2 Multiple Touch Pattern Settings
5.2.1 MTP Tab
The MTP tab of the Main window's Thresholds section shown in Figure 5.3, contains multiple touch
pattern configuration controls. The MTP Thresholds are a percentage of the Sensor Thresholds on the
Active tab.
CAP1xxx Evaluation Board User’s Guide
5.3 Extended Calibration Ranges
When using a CAP129x device, the Sensor Control window will display an Extended Calibration
section, shown in Figure 5.1, for choosing the calibration sensitivity settings for each sensor. This
allows the user to reduce the internal capacitance used while generating the sensing waveform (which
will increase sensitivity), but the sensor must fall within the selected capacitance range or it will not
calibrate.
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Figure 5.3 Multiple Touch Pattern Options
CAP1xxx Evaluation Board User’s Guide
5.4 Power Button
When using a CAP12xx device, the Sensor Control window will display a Power Button section, shown
in Figure 5.1, for enabling a sensor to have a delay before registering a press. This allows systems to
force the user to press for an extended period to verify that a critical action was meant to be performed.
For example: if this is used to power on and off the application, setting a minimum press period with
these options minimizes the chance of a user accidentally pressing the sensor.
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6 GUI LED Control Tab
The LED Control tab provides the detailed controls for the LEDs. Figure 6.1 shows the default view
for the CAP1188 evaluation board.
The CAP12xx devices do not have LED drivers, so this window will not contain any options. The LEDs
on the evaluation board are being driven by the PIC16F145x microcontroller.an EVB using the
CAP1188 device.
CAP1xxx Evaluation Board User’s Guide
Figure 6.1 LED Control Tab for the CAP1188 Evaluation Board
The LED Control Panel has 3 sections: individual (see Section 6.1), all (see Section 6.3), LED behavior
configuration (see Section 6.4), and graphs.
6.1 Individual LED Settings
To access individual LED controls, click the respective LED button on the left side of the control panel
or use the scroll switch above the buttons. The control panel will then display controls for the selected
LED. Figure 6.2 shows the control panel after the 'LED 1' button was clicked.
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Figure 6.2 Individual LED Settings
6.2 LED Status
An indicator in the LED Status section changes color when the LED behavior has completed its cycle
and the LED is in host control mode. The indicator for an LED is disabled when the LED is linked to
a sensor.
If the Auto Clear INT button on the Panel (see Section 4.5, "Communications Status and Control
Panel") is enabled (dark gray), the LED Status indicators are continuously cleared. If the Auto Clear
INT button is disabled (light gray), the user must manually clear interrupts by clicking the Auto Clear
INT button or the INT indicator on the Main Tab (Section 4.12, "Status and Control Panel").
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6.3 All LED Settings
The 'All LED Settings' display, shown in Figure 6.3, displays a view of the LED controls for all the LEDs.
A check mark represents a ‘1’ in logic.
Note: This control panel does not include LED behavior. Use the individual settings panels instead.
CAP1xxx Evaluation Board User’s Guide
DS50002221A-page 38 2013 Microchip Technology Inc.
Figure 6.3 All LED Settings
CAP1xxx Evaluation Board User’s Guide
6.4 LED Behavior Configuration Control Panel
The LED Behavior Configuration Control Panel, shown in Figure 6.4, provides controls for the 4
different types of behaviors available to the LED drivers.
Figure 6.4 LED Behavior Configuration Control Panel
2013 Microchip Technology Inc. DS50002221A-page 39
CAP1xxx Evaluation Board User’s Guide
The graphs, shown in Figure 6.5, at the bottom of the LED Control tab display of how the behaviors
will look based on the selections.
Figure 6.5 LED Behavior Configuration Graphs
Controls in the LED Pulse and Breathe Duty Cycles section affect the LED Duty Cycles Registers (90h
- 93h). Controls in the LED Pulse Periods section affect the LED Period Registers (84h - 86h). Controls
in the LED Behavior Configuration section affect the LED Configuration Register (88h).
The LED Pulse1 Response Graph reflects the settings selected for the Pulse 1 behavior (Maximum
Pulse 1, Minimum Pulse 1, Pulse 1 Period, and Pulse 1 Count). The LED Pulse2 Response Graph
reflects settings selected for Pulse 2 behavior.
Controls in the LED Direct Rates section affect the LED Direct Ramp Rates Register (94h) and LED
Off Delay Register (95h).
The LED Direct Rate Response Graph reflects the settings in the LED Direct Rates section.
DS50002221A-page 40 2013 Microchip Technology Inc.
CAP1xxx Evaluation Board User’s Guide
7 GUI Sensor History Tab
The Sensor History tab displays a graph of sensor delta counts and allows the data to be saved to a
file. Figure 7.1 shows the default view for the CAP1xxx evaluation board.
Figure 7.1 Sensor History Tab for the CAP1xxx Evaluation Board
As sensors are touched, delta counts display on the graph..
To save the delta counts over a period of time, ensure the desired path and filename are showing in
the 'All Sensor History Data Path' box. To change this: Manually type in a path, or select the folder
icon to browse to the desired folder and file. The file should be named with the extension “.csv”. Once
a file name has been chosen, click the “Save Sensor History” switch so it’s in the up (Saving) position.
The software will start logging data into the selected file.
Note 7.1 If a file with the same name already exists, the file will be overwritten and old data will be
lost.
After generating data for a desired period of time, click the 'Save Sensor History' switch so it’s in the
down (OFF) position (see Figure 7.1).
2013 Microchip Technology Inc. DS50002221A-page 41
CAP1xxx Evaluation Board User’s Guide
The data is saved in a .csv format, as shown in Figure 7.2.
Figure 7.2 Sample Sensor_History.csv File
DS50002221A-page 42 2013 Microchip Technology Inc.
CAP1xxx Evaluation Board User’s Guide
8 Troubleshooting
8.1 GUI Controls Unresponsive After Installation
Restart the computer. In some cases, a restart is required after installation.
8.2 Restore Defaults
To restore defaults, press the F6 key on the keyboard or click the Defaults button (see Section 4.5.6,
"Defaults Button"). Alternatively, unplug the USB mini connector from the CAP1xxx evaluation board,
then plug it in again.
8.3 Control Panels Freeze
If the control panels freeze for unknown reasons, communications cannot be stopped, and the program
cannot be closed, disconnect the USB cable from the CAP1xxx evaluation board, then close the
program. Reconnect the evaluation board, then restart the CAP1xxx GUI.
8.4 Values in GUI Control Panels Don’t Match Registers
It’s possible that the GUI control panels can get out of sync with the actual register values when
disconnecting and reconnecting the CAP1xxx evaluation board. If this occurs, click the Update All
Registers button (see Section 4.5.4, "Update All Registers").
8.5 Communications Fail
If the device fails to communicate through the I2C bus, ensure the correct I2C address is displayed
on the Communications Status and Control Panel. The CAP11xx evaluation board has a 0 ohm resistor
connected between VDD and the ADDR_COM pin, and the CAP12xx devices have a static address
that can only be changed at the Microchip Test Facility. So the I2C address should be 28 (50)
(0101_000r/w). If an external board has been connected to the evaluation board's 8-pin
communications header, a new address may need to be selected. If communications were stopped
when the evaluation board was disconnected, click the Run button (see Section 4.5.1, "Stop and Run
Buttons").
2013 Microchip Technology Inc. DS50002221A-page 43
CAP1xxx Evaluation Board User’s Guide
9 Revision History
Table 9.1 Revision History
REVISION LEVEL & DATE SECTION/FIGURE/ENTRY CORRECTION
CAP1xxx Evaluation Board User’s
Guide, Revision A replaces the
previous SMSC document
RightTouch CAP1188 Family EVB
User Manual, Revision 1.0
DS50002221A-page 44 2013 Microchip Technology Inc.
CAP1xxx Evaluation Board User’s Guide
YSTEM
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== ISO/TS 16949 ==
Note the following details of the code protection feature on Microchip devices:
• Microchip products meet the specification contained in their particular Microchip Data Sheet.
• Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the
intended manner and under normal conditions.
• There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our
knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data
Sheets. Most likely, the person doing so is engaged in theft of intellectual property.
• Microchip is willing to work with the customer who is concerned about the integrity of their code.
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Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our
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logo, rfPIC, SST, SST Logo, SuperFlash and UNI/O are registered trademarks of Microchip Technology Incorporated in the U.S.A. and
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registered trademarks of Microchip Technology Incorporated in the U.S.A.
Silicon Storage Technology is a registered trademark of Microchip Technology Inc. in other countries.
Analog-for-the-Digital Age, Application Maestro, BodyCom, chipKIT, chipKIT logo, CodeGuard, dsPICDEM, dsPICDEM.net,
dsPICworks, dsSPEAK, ECAN, ECONOMONITOR, FanSense, HI-TIDE, In-Circuit Serial Programming, ICSP, Mindi, MiWi, MPASM,
MPF, MPLAB Certified logo, MPLIB, MPLINK, mTouch, Omniscient Code Generation, PICC, PICC-18, PICDEM, PICDEM.net, PICkit,
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SQTP is a service mark of Microchip Technology Incorporated in the U.S.A.
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A more complete list of registered trademarks and common law trademarks owned by Standard Microsystems Corporation (“SMSC”)
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All other trademarks mentioned herein are property of their respective companies.
© 2013, Microchip Technology Incorporated, Printed in the U.S.A., All Rights Reserved.
ISBN: 9781620776230
EELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, PICSTART, PIC
32
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2013 Microchip Technology Inc. DS50002221A-page 45
Microchip received ISO/TS-16949:2009 certification for its worldwide
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are for its PIC
devices, Serial EEPROMs, microperipherals, nonvolatile memory and
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and manufacture of development systems is ISO 9001:2000 certified.
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