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CAP1xxx Evaluation Board User’s Guide

 2013 Microchip Technology Inc.

DS50002221A-page 25

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). 

Figure 4.13 Thresholds Control Panel - Standby Tab Displayed

Содержание CAP1 Series

Страница 1: ...2013 Microchip Technology Inc DS50002221A page 1 CAP1xxx Evaluation Board User s Guide...

Страница 2: ...l 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 datas...

Страница 3: ...002221A page 3 Figure 1 1 CAP1xxx Evaluation System CAP1188 Device Capacitive Sensors LED Drivers PIC16F1454 CAP11xx Evaluation Board I2C PC with CAP1xxx GUI USB CAP1298 Device Capacitive Sensors LED...

Страница 4: ...ED 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...

Страница 5: ...e 1 2 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 Table 1 1 CAP11xx Device Differ...

Страница 6: ...013 Microchip Technology Inc Figure 1 3 Evaluation Board Component Side View PIC16F1455 USB 5V to 3 3V Regulator PIC16F1455 Programming Header CAP1188 8 pin Communication Header PIC16F1459 USB PIC16F1...

Страница 7: ...he 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...

Страница 8: ...s 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 I...

Страница 9: ...ons 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 l...

Страница 10: ...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 installat...

Страница 11: ...CAP1xxx Evaluation Board User s Guide 2013 Microchip Technology Inc DS50002221A page 11 Figure 2 6 USB Bridge Driver Installation Step 2 Figure 2 7 USB Bridge Driver Installation Step 3...

Страница 12: ...CAP1xxx Evaluation Board User s Guide DS50002221A page 12 2013 Microchip Technology Inc Figure 2 8 USB Bridge Driver Installation Step 4...

Страница 13: ...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 softwar...

Страница 14: ...ndicator to the left of the value in the cell shown circled in Figure 4 2 4 2 2 Keyboard Shortcuts Some GUI controls have keyboard shortcuts as shown in Table 4 1 4 3 Device Information and Datasheet...

Страница 15: ...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 S...

Страница 16: ...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...

Страница 17: ...ommunications 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 stat...

Страница 18: ...e 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 locat...

Страница 19: ...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 t...

Страница 20: ...f 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 di...

Страница 21: ...lay 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 con...

Страница 22: ...ify 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 t...

Страница 23: ...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 Sen...

Страница 24: ...vice 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...

Страница 25: ...page 25 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 Sen...

Страница 26: ...Inc 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 T...

Страница 27: ...ion shown in Figure 4 15 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 selectio...

Страница 28: ...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...

Страница 29: ...k 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 4 12 2 Configuration and Configuration 2 The Configuration...

Страница 30: ...ate 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 Configu...

Страница 31: ...mine 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 registe...

Страница 32: ...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 th...

Страница 33: ...ors 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 avail...

Страница 34: ...sor Thresholds on the Active tab 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...

Страница 35: ...n 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...

Страница 36: ...n by the PIC16F145x microcontroller an EVB using the CAP1188 device 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 g...

Страница 37: ...ED 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 c...

Страница 38: ...c 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 inclu...

Страница 39: ...DS50002221A page 39 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...

Страница 40: ...isters 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 Maximu...

Страница 41: ...nsor 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 ha...

Страница 42: ...CAP1xxx Evaluation Board User s Guide DS50002221A page 42 2013 Microchip Technology Inc The data is saved in a csv format as shown in Figure 7 2 Figure 7 2 Sample Sensor_History csv File...

Страница 43: ...I 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...

Страница 44: ...Microchip Technology Inc 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 d...

Страница 45: ...s are conveyed implic itly or otherwise under any Microchip intellectual property rights Trademarks The Microchip name and logo the Microchip logo dsPIC FlashFlex KEELOQ KEELOQ logo MPLAB PIC PICmicro...

Страница 46: ...ax 86 24 2334 2393 China Shenzhen Tel 86 755 8864 2200 Fax 86 755 8203 1760 China Wuhan Tel 86 27 5980 5300 Fax 86 27 5980 5118 China Xian Tel 86 29 8833 7252 Fax 86 29 8833 7256 China Xiamen Tel 86 5...

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