CRTouch GUI User Guide
Contents
1. Freescale Semiconductor Document Number CRTOUCHGUIUG User Guide CRTouch GUI User Guide Contents 1 ntrod uct j on Introduction 1 This GUI application is to be used with the CRTouch device 2 Pon ne EL int den b tein ee me Meee 1 The GUI configures and demonstrates CRTouch capabilities 3 Resistive Configuration and Capacitive such as rotate pinch and slide gesture recognition The GUI 2 uses the serial port to communicate with the CRTouch device It has six tabs that have the following features 4 Calibration en 5 Port Settings for the CDC serial port configurations ct 8 Resistive Configuration 6 Mouse Emulation Tab eee 9 e Calibration for single touch and multi touch Gestures for demonstration on multi touch gestures 7 aroen Eegen biete dide 11 Mouse Emulation which shows one of the applications 8 References enne etnies 11 that can be achieved with the CRTouch device S 11 2 Port Settings Tab The serial port settings are baud rate 115200 data bits 8 e stop bits 1 parity odd flow control none This GUI will try to communicate with the CRTouch device always using the above configuration The serial port number can be selected from the Select Com Port drop down box If for any reason the baud rate configured on the CRTouch2. 2013 Freescale Semiconductor Inc v Rev 3 07 2013 freescale Resistive Configuration and Capacitive Configuration Tabs device does not match the GUI s baud rate a baud rate auto detection mechanism starts The GUI asks you to enter the CRTouch device into a baud rate auto detection mode See the data sheet titled CR Touch Data Sheet Capacitive and Resistive Touch Sensing Application Specific IC document number CRTOUCHDS for more information about the baud rate auto detection mechanism Click the interrogation icon on the top right corner of the GUI to open the CRTouch datasheet 3 Resistive Configuration and Capacitive Configuration Tabs These tabs allow you to customize the CRTouch for different applications and different hardware Figure 1 and Figure 2 show tabs which allow readings to know the current CR Touch device configuration and writings to customize the performance of the device CRTouch GUI User Guide Rev 3 07 2013 2 Freescale Semiconductor Inc Resistive Configuration and Capacitive Configuration Tabs 22 CR TOUCH Configuration GUI v2 1 Status Registers Configuration Registers Status Eror Register 0 0000000 Configuration Register lololol ilolo Status Register 00000000 Tigger Events 00002101 Status Register 1000000 1 FIFO Setup Register 0 X Coordinate ee En Base Y Coordinate A Settling Time usec Y Settling Time FIFO Status Register DOU Settling
3. See the CRTouch datasheet for more information about how to perform a gesture using the touch screen Click the interrogation icon on the top right corner of the GUI to open the CRTouch datasheet CRTouch GUI User Guide Rev 3 07 2013 8 Freescale Semiconductor Inc Mouse Emulation Tab Es CR TOUCH Configuration GUI v2 1 Figure 10 Gesture demonstration tab 6 Mouse Emulation Tab This tab shows how the CRTouch device can be configured as a mouse pad The mouse emulation window takes the X and Y coordinates from the resistive touch screen as 1f it was the mouse input for a computer e Mouse Emulation Procedure e After the Enable mouse emulation button is pressed the computer mouse is inhibited and the mouse pointer must be moved through the touch pad e Move the mouse pointer over the Disable mouse emulation button and press left click to end the mouse emulation mode CRTouch GUI User Guide Rev 3 07 2013 Freescale Semiconductor Inc 9 Mouse Emulation Tab Another way to do this is pressing and holding the reset button on the CRTouch evaluation board and using the computer mouse to left click on the disable mouse emulation button CR TOUCH Configuration GUI v2 1 peser Resistive Configuration otatus Registers TSS Status Registers Status Eror Register E Electrode Status Status Register Sta
4. obtain the most recent driver version download it at freescale com usb2ser NET Framework 4 0 or newer You must have installed on your computer a NET Framework version 4 0 or greater Otherwise you will not be able to run the application Go to microsoft com download en details aspx id 17851 to download the NET Framework version 4 0 8 References http www freescale com CRTOUCH 9 Revision History ate o yo Change Description 06 2013 Updated to describe changes on CRTouch GUI software tool version 2 1 07 2013 Integrated document EVBCRTOUCH USER GUIDE v0 2 from Jose Reyes CRTouch GUI User Guide Rev 3 07 2013 Freescale Semiconductor Inc 11 How to Reach Us Home Page freescale com Web Support freescale com support Information in this document is provided solely to enable system and software implementers to use Freescale products There are no express or implied copyright licenses granted hereunder to design or fabricate any integrated circuits based on the information in this document Freescale reserves the right to make changes without further notice to any products herein Freescale makes no warranty representation or guarantee regarding the suitability of its products for any particular purpose nor does Freescale assume any liability arising out of the application or use of any product or circuit and specifically disclaims any and all liability including without limitation consequential or incident
5. 5 Calibration Tab CR TOUCH Configuration GUI v2 1 c amp Port Settings Resistive Configuration Capacitive Configuration Calibration Gestures Mouse Emulation e Numeric Calibration Physical Calibration Enter numerical values to calbrate resistive screen X Calibration Valuel 0 Y Calibration Valuel 0 X Calibration Value O Y Calibration Value2 0 X Calibration Value3 0 Y Calibration Value3 0 X Calibration Constant 0 Y Calbration Constant 0 Calibrate touching the nesistive screen Single Touch Calibration Jj Multi Touch Calibration Figure 7 Calibration Tab There are two ways to calibrate the device namely the physical and the numeric calibration The physical calibration is a more user friendly method which is started by choosing single or multi touch calibration at the Physical Calibration section in this tab after clicking on the Calibrate button The GUI then displays a pop up window showing the point of the touch screen that must be touched After the point is touched and released the GUI shows the next point where the user must touch The pop up window disappears after the calibration process ends The physical calibration procedure consists of the following steps Detecting three X and Y pairs of coordinates See Figure 8 The first coordinate should be at 10 of X and 10 of Y axis The se
6. Time usec 7 ai Toni rss FIFO X Coordinate Setting Time usec FIFO Coordinate Horizontal Resolution UART Baudrate 115200 Device Identifier 29 ai Rotate Angle foom Size Figure 1 Resistive Configuration Tab CRTouch GUI User Guide Rev 3 07 2013 Freescale Semiconductor Inc 3 Resistive Configuration and Capacitive Configuration Tabs p CR TOUCH Configuration GUI v2 1 Configuration Registers System Configuration 0 0 10000 0 Low Power Scan Period DC Tracker Rate 100 Low Power Electrode Response Time Low Power Ex Sensitivity stuck Key Timeout Gesture Events 0000000 1 EO Sensitivity Auto Repeat Rate E1 Sensitivity Auto Repeat Start E2 Sensitivity Maximum Touches E3 Sensitivity Capacitive Resolution Electrode Enablers otatus Registers Hectrode Status 0 0 0 Touch Fauts 0 0 0 Dynamic Status Static Status Electrodes FIFO Figure 2 Capacitive Configuration tab One or several registers can be modified at the same time To modify a register change the value shown on the register field and click on the change button A pop up window appears if an error arises while a reading or writing is in progress This window indicates the register name that causes the error and also the cause of the error See Figure 3 CRTouch GUI User Guide Rev 3 07 2013 4 Freescale Semiconductor Inc ee E Calibration Tab Error Reading Y Calibration Point 1 E The device didn t respond Figure 3 Err
7. al damages Typical parameters that may be provided in Freescale data sheets and or specifications can and do vary in different applications and actual performance may vary over time All operating parameters including typicals must be validated for each customer application by customer s technical experts Freescale does not convey any license under its patent rights nor the rights of others Freescale sells products pursuant to standard terms and conditions of sale which can be found at the following address freescale com SalesTermsandConditions Freescale and the Freescale logo are trademarks of Freescale Semiconductor Inc Reg U S Pat amp Tm Off Ready Play is a trademark of Freescale Semiconductor Inc All other product or service names are the property of their respective owners 2013 Freescale Semiconductor Inc Document Number CHTOUCHGUIUG Rev 3 07 2013 e Po 2 freescale
8. cond coordinate should be at 5096 of X and 90 of Y axis The third coordinate should be at 90 of X and 50 of Y axis CRTouch GUI User Guide Rev 3 07 2013 Freescale Semiconductor Inc C Calibration Tab 50 90 50 Figure 8 Single Touch Calibration Points When multi touch detection is enabled there will be two pairs of multi touch coordinates that have to be touched See Figure 9 1076 5096 90 50 90 Figure 9 Multi touch Calibration Points e RECOMMENDATIONS Usea stylus or a different item to improve the accuracy for the single touch detection Use the fingers for the multi touch coordinates NOTE For optimal multi touch gestures detection the screen resolution must also be configured to match the physical proportions of the screen IMPORTANT You may have to do the calibration process several times before you get to the correct calibration A less user friendly way to trigger the physical calibration is to set the bit 6 on the Trigger Events Register at the Resistive Configuration tab If this bit is set and the change button is pressed the same pop up window displays as described earlier Alternatively to ensure that the Resistive Screen is properly calibrated the Calibration error detected bit on Status Error Register found at the Resistive Configuration tab is disabled and the Resistive touch screen calibrated bit in the Status Registe
9. or reporting A help description of each field is shown by placing the cursor over the field See Figure 4 Maximum Touches gt Ma limit established 1 15 Limit set to n keys Figure 4 Help description Many registers are bit fields and each bit can be modified by clicking on it Each click toggles the bit from to 1 and from 1 to 0 See Figure 5 System Lonfiguration 0 0 0 g g g Figure 5 Bit fields The remaining registers that are not bit fields must be written with the desired value by typing a decimal value If the fields are empty the value is out of range or it is not in decimal format an error icon next to the text box appears indicating the cause of the error See Figure 6 E3 Sensitivity a 09 The value is not in decimal Format Figure 6 Error description icon There are read only registers and they are colored in brown Also there are bit fields marked as N A these bit fields can not be modified and they are read always as 0 See the CRTouch datasheet for more information about the registers memory map Click the interrogation icon on the top right corner of the GUI to open the CRTouch datasheet 4 Calibration Tab CRTouch requires performing a calibration procedure to adjust the coordinates detection for a single touch event and calibrates the internal circuitry for multi touch detection This tab will be useful for the process CRTouch GUI User Guide Rev 3 07 2013 Freescale Semiconductor Inc
10. r2 is enabled 1 The numeric calibration method can be done by directly entering the calibration constants into the fields at the Numeric Calibration section then clicking on the Change button and verifying that the entered calibration constants are the same after clicking on the Read button After the resistive screen is properly configured and calibrated you shouldn t have any problems with the gesture recognition CRTouch GUI User Guide Rev 3 07 2013 Freescale Semiconductor Inc 7 Gestures Tab 5 Gestures Tab This tab demonstrates clockwise counterclockwise rotation zoom in zoom out vertical and horizontal slide gestures if they are configured on the Resistive Configuration tab The demonstration uses multi touch gestures This window requires that the calibration procedure including the multi touch calibration has already been performed Gesture Procedure e Press the start button to begin the gesture demonstration The GUI will send reading requests through the UART port as fast as possible until the stop button is pressed While the demonstration is running you should be able to rotate clockwise and counterclockwise zoom 1n and out and slide vertically and horizontally the image on the screen Press the stop button to end the demonstration and stop the communication with the CRTouch device NOTE The slide gesture takes effect only when the image size is greater than the original size
11. tus Register X Coordinate Y Coordinate Touch Faults Dynamic Status Static Status Electrodes FIFO Pressure X Mouse Coordinate Y Mouse Coordinate O FIFO Status Register FIFO X Coordinate FIFO Coordinate FIFO Pressure Slide Displacement Rotate Angle foom Size Refresh Registers Relative Position Figure 11 Mouse pointer coordinates Optional Configurations This tab allows configuring the touch pad with relative or absolute coordinates Check the Relative Position check box if the touch pad is not mounted over a display The slide gesture can be configured to scroll up or scroll down The capacitive electrode and electrode 1 can also be configured as keypad to perform a left click and right click respectively e RECOMMENDATIONS CRTouch GUI User Guide Rev 3 07 2013 10 Freescale Semiconductor Inc System Requirements Check the Refresh Registers check box to refresh the status register fields periodically This option can be disabled to improve the mouse pointer detection tis recommended that the screen resolution matches with the horizontal and vertical resolution values in the CRTouch settings Use the stylus for a better performance of the mouse emulation 7 System Requirements USB to SERIAL Driver You must have installed on your computer the USB to SERIAL driver before you try to use the GUI The installer for version 2 1 includes the driver To
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