AN-000227
Document Number: AN-000227
Page 3 of 15
Revision: 1.0
TABLE OF CONTENTS
Introduction ........................................................................................................................................................... 2
1.1
Required Equipment .................................................................................................................................... 2
1.2
Required Software Packages ........................................................................................................................ 2
Installation / Preparation ...................................................................................................................................... 4
Building the Presence Detection Application ........................................................................................................ 6
Programming the SmartSonic Board ..................................................................................................................... 7
Running the Presence Detection Application ........................................................................................................ 9
Changing the Presence Detection Application Settings ...................................................................................... 13
6.1
MEASUREMENT_INTERVAL_MS ................................................................................................................. 13
Reference Documents ......................................................................................................................................... 14
Revision History ................................................................................................................................................... 15
LIST OF FIGURES
Figure 1. SmartSonic with CH201 Daughter Board ........................................................................................................ 4
Figure 2. Device Programming Screen ........................................................................................................................... 7
Figure 3. Device Signature and Target Voltage .............................................................................................................. 8
Figure 4. Programming Hex File ..................................................................................................................................... 8
Figure 5. Successful Programming ................................................................................................................................. 9
Figure 6. Typical Output During Initialization - 2 Sensors ............................................................................................ 11
Figure 7. Typical Output During Operation - 2 Sensors ............................................................................................... 12
Page 1: ...specifications and information herein without notice Chirp Microsystems 2560 Ninth Street Ste 220 Berkeley CA 94710 U S A 1 510 640 8155 www chirpmicro com Document Number AN 000227 Revision 1 0 Relea...
Page 2: ...d on the presence detection algorithm In this example the application is built using Atmel Studio 7 for the Chirp SmartSonic evaluation board which features an Atmel SAMG55 microcontroller The SmartSo...
Page 3: ...Detection Application 9 Changing the Presence Detection Application Settings 13 6 1 MEASUREMENT_INTERVAL_MS 13 Reference Documents 14 Revision History 15 LIST OF FIGURES Figure 1 SmartSonic with CH20...
Page 4: ...e white arrows Optional Using flat flex cables attach additional off board sensor s to the connectors on the daughterboard If an offboard sensor is connected to the Sensor 0 connector J6 you must set...
Page 5: ...ort number assigned to the SmartSonic board There will be one port associated with the SmartSonic board called EDBG A second COM port will also be assigned but is not used in this application o The ED...
Page 6: ...ion about the operation of the application The application smartsonic presence example inc app_config h file specifies the overall measurement interval The default is 100 ms 10 Hz sample rate o board...
Page 7: ...gramming Screen Verify that the tool is EDBG device is ATSAMG55J19 and interface is SWD Select Apply o Note Atmel Studio 7 may require you to update the EDBG debug interface firmware on the SmartSonic...
Page 8: ...00227 Page 8 of 15 Revision 1 0 Figure 3 Device Signature and Target Voltage Select Memories on the Device Programming menu The Device Programming menu will prompt for the name of the file to program...
Page 9: ...the Atmel Studio 7 debugging features it does not matter which file you use Select Program Your SmartSonic board is successfully programmed when the Device Programming screen displays the OK messages...
Page 10: ...e o Sensor number o Boolean indicator of whether object presence was detected 0 no presence 1 presence o Range measurement expressed in millimeters o Confidence level expressed as a percentage In the...
Page 11: ...orithm detects changes in the ultrasound environment it is normal for the first few measurement cycles to report no presence detected Figure 6 shows the typical application output during initializatio...
Page 12: ...rements has been made the presence of objects can be detected Figure 7 shows typical application output during operation with two sensors The Merged output lines indicate the overall Presence Detectio...
Page 13: ...pplication s timing 6 1 MEASUREMENT_INTERVAL_MS Specifies how often a new measurement cycle will be initiated in milliseconds Default 100 ms 10Hz sample rate This value is used in main as a parameter...
Page 14: ...AN 000227 Document Number AN 000227 Page 14 of 15 Revision 1 0 REFERENCE DOCUMENTS AN 000214 Presence Detection AN 000226 CH201 Ultrasonic Presence Detection Reference Design User Guide...
Page 15: ...the infringement of patents copyrights mask work and or other intellectual property rights Certain intellectual property owned by Chirp Microsystems and described in this document is patent protected...
