Class BrickletSoundPressureLevel


  • public class BrickletSoundPressureLevel
    extends Device
    Measures Sound Pressure Level in dB(A/B/C/D/Z)
    • Field Detail

      • DEVICE_DISPLAY_NAME

        public static final java.lang.String DEVICE_DISPLAY_NAME
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      • FUNCTION_SET_DECIBEL_CALLBACK_CONFIGURATION

        public static final byte FUNCTION_SET_DECIBEL_CALLBACK_CONFIGURATION
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      • FUNCTION_GET_DECIBEL_CALLBACK_CONFIGURATION

        public static final byte FUNCTION_GET_DECIBEL_CALLBACK_CONFIGURATION
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      • FUNCTION_GET_SPECTRUM_LOW_LEVEL

        public static final byte FUNCTION_GET_SPECTRUM_LOW_LEVEL
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      • FUNCTION_SET_SPECTRUM_CALLBACK_CONFIGURATION

        public static final byte FUNCTION_SET_SPECTRUM_CALLBACK_CONFIGURATION
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      • FUNCTION_GET_SPECTRUM_CALLBACK_CONFIGURATION

        public static final byte FUNCTION_GET_SPECTRUM_CALLBACK_CONFIGURATION
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      • FUNCTION_SET_CONFIGURATION

        public static final byte FUNCTION_SET_CONFIGURATION
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      • FUNCTION_GET_CONFIGURATION

        public static final byte FUNCTION_GET_CONFIGURATION
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      • FUNCTION_GET_SPITFP_ERROR_COUNT

        public static final byte FUNCTION_GET_SPITFP_ERROR_COUNT
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      • FUNCTION_SET_BOOTLOADER_MODE

        public static final byte FUNCTION_SET_BOOTLOADER_MODE
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      • FUNCTION_GET_BOOTLOADER_MODE

        public static final byte FUNCTION_GET_BOOTLOADER_MODE
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      • FUNCTION_SET_WRITE_FIRMWARE_POINTER

        public static final byte FUNCTION_SET_WRITE_FIRMWARE_POINTER
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      • FUNCTION_WRITE_FIRMWARE

        public static final byte FUNCTION_WRITE_FIRMWARE
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      • FUNCTION_SET_STATUS_LED_CONFIG

        public static final byte FUNCTION_SET_STATUS_LED_CONFIG
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      • FUNCTION_GET_STATUS_LED_CONFIG

        public static final byte FUNCTION_GET_STATUS_LED_CONFIG
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      • FUNCTION_GET_CHIP_TEMPERATURE

        public static final byte FUNCTION_GET_CHIP_TEMPERATURE
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      • THRESHOLD_OPTION_OUTSIDE

        public static final char THRESHOLD_OPTION_OUTSIDE
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      • THRESHOLD_OPTION_INSIDE

        public static final char THRESHOLD_OPTION_INSIDE
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      • THRESHOLD_OPTION_SMALLER

        public static final char THRESHOLD_OPTION_SMALLER
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      • THRESHOLD_OPTION_GREATER

        public static final char THRESHOLD_OPTION_GREATER
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      • BOOTLOADER_MODE_BOOTLOADER

        public static final int BOOTLOADER_MODE_BOOTLOADER
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      • BOOTLOADER_MODE_FIRMWARE

        public static final int BOOTLOADER_MODE_FIRMWARE
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      • BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT

        public static final int BOOTLOADER_MODE_BOOTLOADER_WAIT_FOR_REBOOT
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      • BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT

        public static final int BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_REBOOT
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      • BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT

        public static final int BOOTLOADER_MODE_FIRMWARE_WAIT_FOR_ERASE_AND_REBOOT
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      • BOOTLOADER_STATUS_INVALID_MODE

        public static final int BOOTLOADER_STATUS_INVALID_MODE
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      • BOOTLOADER_STATUS_NO_CHANGE

        public static final int BOOTLOADER_STATUS_NO_CHANGE
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      • BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT

        public static final int BOOTLOADER_STATUS_ENTRY_FUNCTION_NOT_PRESENT
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      • BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT

        public static final int BOOTLOADER_STATUS_DEVICE_IDENTIFIER_INCORRECT
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      • BOOTLOADER_STATUS_CRC_MISMATCH

        public static final int BOOTLOADER_STATUS_CRC_MISMATCH
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      • STATUS_LED_CONFIG_SHOW_HEARTBEAT

        public static final int STATUS_LED_CONFIG_SHOW_HEARTBEAT
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      • STATUS_LED_CONFIG_SHOW_STATUS

        public static final int STATUS_LED_CONFIG_SHOW_STATUS
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    • Constructor Detail

      • BrickletSoundPressureLevel

        public BrickletSoundPressureLevel​(java.lang.String uid,
                                          IPConnection ipcon)
        Creates an object with the unique device ID \c uid. and adds it to the IP Connection \c ipcon.
    • Method Detail

      • setDecibelCallbackConfiguration

        public void setDecibelCallbackConfiguration​(long period,
                                                    boolean valueHasToChange,
                                                    char option,
                                                    int min,
                                                    int max)
                                             throws TinkerforgeException
        The period is the period with which the BrickletSoundPressureLevel.DecibelListener listener is triggered periodically. A value of 0 turns the listener off. If the `value has to change`-parameter is set to true, the listener is only triggered after the value has changed. If the value didn't change within the period, the listener is triggered immediately on change. If it is set to false, the listener is continuously triggered with the period, independent of the value. It is furthermore possible to constrain the listener with thresholds. The `option`-parameter together with min/max sets a threshold for the BrickletSoundPressureLevel.DecibelListener listener. The following options are possible: \verbatim "Option", "Description" "'x'", "Threshold is turned off" "'o'", "Threshold is triggered when the value is *outside* the min and max values" "'i'", "Threshold is triggered when the value is *inside* or equal to the min and max values" "'<'", "Threshold is triggered when the value is smaller than the min value (max is ignored)" "'>'", "Threshold is triggered when the value is greater than the min value (max is ignored)" \endverbatim If the option is set to 'x' (threshold turned off) the listener is triggered with the fixed period.
        Throws:
        TinkerforgeException
      • getSpectrumLowLevel

        public BrickletSoundPressureLevel.SpectrumLowLevel getSpectrumLowLevel()
                                                                        throws TinkerforgeException
        Returns the frequency spectrum. The length of the spectrum is between 512 (FFT size 1024) and 64 (FFT size 128). See setConfiguration(int, int). Each array element is one bin of the FFT. The first bin is always the DC offset and the other bins have a size between 40Hz (FFT size 1024) and 320Hz (FFT size 128). In sum the frequency of the spectrum always has a range from 0 to 20480Hz (the FFT is applied to samples with a frequency of 40960Hz). The returned data is already equalized, which means that the microphone frequency response is compensated and the weighting function is applied (see setConfiguration(int, int) for the available weighting standards). Use dB(Z) if you need the unaltered spectrum. The values are not in dB form yet. If you want a proper dB scale of the spectrum you have to apply the formula f(x) = 20*log10(max(1, x/sqrt(2))) on each value.
        Throws:
        TinkerforgeException
      • setSpectrumCallbackConfiguration

        public void setSpectrumCallbackConfiguration​(long period)
                                              throws TinkerforgeException
        The period is the period with which the BrickletSoundPressureLevel.SpectrumListener listener is triggered periodically. A value of 0 turns the listener off. Every new measured spectrum will be send at most once. Set the period to 1 to make sure that you get every spectrum.
        Throws:
        TinkerforgeException
      • setConfiguration

        public void setConfiguration​(int fftSize,
                                     int weighting)
                              throws TinkerforgeException
        Sets the Sound Pressure Level Bricklet configuration. With different FFT sizes the Bricklet has a different amount of samples per second and the size of the FFT bins changes. The higher the FFT size the more precise is the result of the dB(X) calculation. Available FFT sizes are: * 1024: 512 bins, 10 samples per second, each bin has size 40Hz * 512: 256 bins, 20 samples per second, each bin has size 80Hz * 256: 128 bins, 40 samples per second, each bin has size 160Hz * 128: 64 bins, 80 samples per second, each bin has size 320Hz The Bricklet supports different weighting functions. You can choose between dB(A), dB(B), dB(C), dB(D), dB(Z) and ITU-R 468. dB(A/B/C/D) are the standard dB weighting curves. dB(A) is often used to measure volumes at concerts etc. dB(Z) has a flat response, no weighting is applied. ITU-R 468 is an ITU weighting standard mostly used in the UK and Europe.
        Throws:
        TinkerforgeException
      • getSPITFPErrorCount

        public BrickletSoundPressureLevel.SPITFPErrorCount getSPITFPErrorCount()
                                                                        throws TinkerforgeException
        Returns the error count for the communication between Brick and Bricklet. The errors are divided into * ACK checksum errors, * message checksum errors, * framing errors and * overflow errors. The errors counts are for errors that occur on the Bricklet side. All Bricks have a similar function that returns the errors on the Brick side.
        Throws:
        TinkerforgeException
      • setBootloaderMode

        public int setBootloaderMode​(int mode)
                              throws TinkerforgeException
        Sets the bootloader mode and returns the status after the requested mode change was instigated. You can change from bootloader mode to firmware mode and vice versa. A change from bootloader mode to firmware mode will only take place if the entry function, device identifier and CRC are present and correct. This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
        Throws:
        TinkerforgeException
      • setWriteFirmwarePointer

        public void setWriteFirmwarePointer​(long pointer)
                                     throws TinkerforgeException
        Sets the firmware pointer for writeFirmware(int[]). The pointer has to be increased by chunks of size 64. The data is written to flash every 4 chunks (which equals to one page of size 256). This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
        Throws:
        TinkerforgeException
      • writeFirmware

        public int writeFirmware​(int[] data)
                          throws TinkerforgeException
        Writes 64 Bytes of firmware at the position as written by setWriteFirmwarePointer(long) before. The firmware is written to flash every 4 chunks. You can only write firmware in bootloader mode. This function is used by Brick Viewer during flashing. It should not be necessary to call it in a normal user program.
        Throws:
        TinkerforgeException
      • setStatusLEDConfig

        public void setStatusLEDConfig​(int config)
                                throws TinkerforgeException
        Sets the status LED configuration. By default the LED shows communication traffic between Brick and Bricklet, it flickers once for every 10 received data packets. You can also turn the LED permanently on/off or show a heartbeat. If the Bricklet is in bootloader mode, the LED is will show heartbeat by default.
        Throws:
        TinkerforgeException
      • getChipTemperature

        public int getChipTemperature()
                               throws TinkerforgeException
        Returns the temperature as measured inside the microcontroller. The value returned is not the ambient temperature! The temperature is only proportional to the real temperature and it has bad accuracy. Practically it is only useful as an indicator for temperature changes.
        Throws:
        TinkerforgeException
      • reset

        public void reset()
                   throws TinkerforgeException
        Calling this function will reset the Bricklet. All configurations will be lost. After a reset you have to create new device objects, calling functions on the existing ones will result in undefined behavior!
        Throws:
        TinkerforgeException
      • writeUID

        public void writeUID​(long uid)
                      throws TinkerforgeException
        Writes a new UID into flash. If you want to set a new UID you have to decode the Base58 encoded UID string into an integer first. We recommend that you use Brick Viewer to change the UID.
        Throws:
        TinkerforgeException
      • getIdentity

        public Device.Identity getIdentity()
                                    throws TinkerforgeException
        Returns the UID, the UID where the Bricklet is connected to, the position, the hardware and firmware version as well as the device identifier. The position can be 'a', 'b', 'c', 'd', 'e', 'f', 'g' or 'h' (Bricklet Port). A Bricklet connected to an :ref:`Isolator Bricklet <isolator_bricklet>` is always at position 'z'. The device identifier numbers can be found :ref:`here <device_identifier>`. |device_identifier_constant|
        Specified by:
        getIdentity in class Device
        Throws:
        TinkerforgeException
      • getSpectrum

        public int[] getSpectrum()
                          throws TinkerforgeException
        Returns the frequency spectrum. The length of the spectrum is between 512 (FFT size 1024) and 64 (FFT size 128). See setConfiguration(int, int). Each array element is one bin of the FFT. The first bin is always the DC offset and the other bins have a size between 40Hz (FFT size 1024) and 320Hz (FFT size 128). In sum the frequency of the spectrum always has a range from 0 to 20480Hz (the FFT is applied to samples with a frequency of 40960Hz). The returned data is already equalized, which means that the microphone frequency response is compensated and the weighting function is applied (see setConfiguration(int, int) for the available weighting standards). Use dB(Z) if you need the unaltered spectrum. The values are not in dB form yet. If you want a proper dB scale of the spectrum you have to apply the formula f(x) = 20*log10(max(1, x/sqrt(2))) on each value.
        Throws:
        TinkerforgeException