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Silicon Laboratories DIGITAL COMPASS-RD User Manual
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Silicon Laboratories DIGITAL COMPASS-RD User Manual

Silicon Laboratories DIGITAL COMPASS-RD User Manual

Digital compass reference design kit
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Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution
of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business
relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components
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IC,Modules,Potentiometer,IC Socket,Relay,Connector.Our parts cover such applications as commercial,industrial,
and automotives areas.
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Summary of Contents for Silicon Laboratories DIGITAL COMPASS-RD

  • Page 1 Chipsmall Limited consists of a professional team with an average of over 10 year of expertise in the distribution of electronic components. Based in Hongkong, we have already established firm and mutual-benefit business relationships with customers from,Europe,America and south Asia,supplying obsolete and hard-to-find components to meet their specific needs.

  • Page 2: Kit Contents

    Two AAA alkaline batteries 2. Introduction The Digital Compass Reference Design Kit combines the performance of Silicon Laboratories MCU's and the latest sensors in magnetic and tilt measuring. This reference design offers a high performance and reliable compass solution while demonstrating the ability to interface sensors directly to an MCU.
  • Page 3 When inclination is on, the tilt angles on both X and Y axes is displayed d) 16 arrows that indicate the North direction relative to the reference point e) Silicon Laboratories logo f) 2 digits that indicate the heading or the menu of the compass...

  • Page 4: Power Leds

    DIGITAL COMPASS-RD Figure 2. LCD Indicators 5.3. Buttons The MENU and ENTER buttons are located on the board to provide access to the compass menu. The following is a short description of these button functions. See Section 6 for a more detailed description of the operation of the compass.

  • Page 5: Modes Of Operation

    The degrees of the azimuth angle b) The minutes of the azimuth angle c) The direction of NORTH relative to the reference point d) Silicon Laboratories logo e) Heading direction relative to the reference point Figure 3. LCD Azimuth Mode Display 6.3.

  • Page 6: Tilt Calibration

    DIGITAL COMPASS-RD 6.4. Inclination Choose menu option "I" and press the ENTER button to select this option. Angles of tilt on both X and Y axes will be displayed on the LCD. Inclination angles can be measured correctly up to 70 degrees on both axes. Beyond this value the degree displayed will be 70.
  • Page 7 DIGITAL COMPASS-RD 6.6. Calibration To calibrate the compass, put the board in a horizontal position. Choose menu option "C" and press the ENTER button to select this option. Use the following steps to perform a calibration of the magnetic compass: Hold the compass in a perfectly horizontal position.
  • Page 8 DIGITAL COMPASS-RD Put the compass upside down, again as horizontal as possible, and hold it for a few seconds. Turn the compass back over to introduce the degree value of the declination angle. Use the MENU button to increment the value. The display will appear as shown in Figure 9. After the correct value of the declination angle for your region has been set, press the ENTER button.

  • Page 9: Declination Angle

    7. Declination Angle The compass is calibrated at the Silicon Laboratories factory in Austin, Texas but because the angle of declination varies with respect to geographic position, the compass must be calibrated again for the specific location of use to achieve maximum accuracy.

  • Page 10: Connection Options

    DIGITAL COMPASS-RD 8.2. Connection Options Use the following steps to run the compass software and connect to the board. Start the compass application by running Compass.exe located by default at "C:\SiLabs\MCU\Demos\C8051F35x". The application is shown in Figure 11. Figure 11. Compass Software Startup To connect to the board, the COM port designated to compass device must be specified.
  • Page 11 DIGITAL COMPASS-RD Once the COM port has been determined, press the "Select COM Port (COM_)" option in the Compass application. Enter the correct COM port into the "COM Port Selection" window shown in Figure 13. Figure 13. COM Port Selection Press the "Start Communication"...
  • Page 12 Figure 15. C8051F350-COMPASS Evaluation Board Schematic (Page 1)
  • Page 13 Figure 16. C8051F350-COMPASS Evaluation Board Schematic (Page 2)
  • Page 14 Figure 17. C8051F350-COMPASS Evaluation Board Schematic (Page 3)

  • Page 15: Contact Information

    Silicon Laboratories products are not designed, intended, or authorized for use in applications intended to support or sustain life, or for any other application in which the failure of the Silicon Laboratories product could create a situation where per- sonal injury or death may occur.