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Thread: Teensy Convolution SDR (Software Defined Radio)

  1. #601
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    gmtii: I followed this method to solder, but I can’t receive the signal. I don’t know why? Can you help me?

  2. #602
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    I don’t know why I can’t upload pictures. Do you have an email address?

  3. #603
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    Question audio output

    [QUOTE=DD4WH;261776]Hi Rudolf: no, there is no complete schematic / es gibt keinen kompletten Schaltplan. Its the very nature of the project that the Teensy Convolution SDR can cope with every I & Q input from many different frontends and that builders have their own plan of the hardware. But you can find an incomplete suggestion in:

    Hallo Frank,

    and Frohe Ostern !

    I have teensy 3.6 also the Elektor SDR board.
    Do I need to buy audio teensy board, or I can use audio output from elektor sdr?
    Thank you in advance !

    My best 73, de yo2ldk

  4. #604
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    You Need additional the teensy audio board, which is use as ADC for the analog I/Q signals from the Elektor SDR.

  5. #605
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    ..and from my experience, the Elektor board is not very good, but sufficient for the fist experiments. Just don't expect great results.

  6. #606
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    The problem of the Elektor SDR is the noisy op amplifier. An low-noise op as the TS464 or TS974 instead the TS914 gives bettler performance.

  7. #607
    Senior Member Rolfdegen's Avatar
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    Nice project

  8. #608
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    Ich habe den Empfänger zusammengestellt und bin sehr zufrieden. Kompiliert #define HARDWARE_DO7JBH mit den Modulen PCM1808 / PCM5102. Die Lautstärke ändert sich jedoch nicht, wenn der Encoder von 0 bis 100 eingestellt wird. Bitte um Hilfe

  9. #609
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    Hallo Frank

    I have put together the receiver and I am very satisfied. Compiles #define HARDWARE_DO7JBH with PCM1808/PCM5102 modules. However, the volume does not change when the encoder is set from 0 to 100. Ask for help

  10. #610
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    Hello,
    I'm a newbie at Teensy SDR project so excuse me if I ask a wrong or unnecessary question.
    I decided to build the Teensy-Convolution SDR project.
    I ordered Teensy 4.0, 2.4 inch ILI9341 LCD, ADC PCM1808 module, DAC PCM5102a module and receiver module from QRP-Labs.
    By the way, I downloaded all the files from https://github.com/DD4WH/Teensy-ConvolutionSDR. I installed Teensyduino. I also installed the si5351 library and the Arduino-Teensy-Codec library. I also fulfilled the issues stated in the "Software setup:" section at https://github.com/DD4WH/Teensy-ConvolutionSDR.
    Finally, I wanted to compile the "Teensy_Convolution_SDR.ino" file to try, but got some error messages.
    My question is: is there a document that outlining what needs to be done according to the latest version and libraries?
    Regards.
    Recep

  11. #611
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    Hello,
    I'm also am newbie at Teensy SDR project. I downloaded all the files from https://github.com/DD4WH/Teensy-ConvolutionSDR.
    I have been able to stop the compilation errors by adding all of the necessary libraries but, it still gives a lot of warnings.

    Can I ignore these warnings? See below.

    Regards.
    ------------------------

    Teensy_Convolution_SDR_aw:406: warning: large integer implicitly truncated to unsigned type
    uint16_t termColor = 0x10000;
    ^
    Teensy_Convolution_SDR_aw:678: warning: ISO C++ forbids converting a string constant to 'char*'
    };
    ^
    Teensy_Convolution_SDR_aw:678: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:678: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    };
    ^
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw:689: warning: ISO C++ forbids converting a string constant to 'char*'
    Teensy_Convolution_SDR_aw: In function 'void setup()':
    /Users/aw/Documents/Arduino/Teensy_Convolution_SDR_aw/Teensy_Convolution_SDR_aw.ino:3546:116: warning: invalid conversion from 'const float32_t* {aka const float*}' to 'float32_t* {aka float*}' [-fpermissive]
    arm_fir_init_f32 (&FIR_WFM_I, FIR_WFM_num_taps, FIR_WFM_Coef, FIR_WFM_I_state, (uint32_t)WFM_BLOCKS * BUFFER_SIZE);
    ^
    In file included from /Applications/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/Audio/analyze_fft256.h:32:0,
    from /Applications/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/Audio/Audio.h:61,
    from /Users/aw/Documents/Arduino/Teensy_Convolution_SDR_aw/Teensy_Convolution_SDR_aw.ino:269:
    /Applications/Teensyduino.app/Contents/Java/hardware/teensy/avr/cores/teensy4/arm_math.h:1234:8: note: initializing argument 3 of 'void arm_fir_init_f32(arm_fir_instance_f32*, uint16_t, float32_t*, float32_t*, uint32_t)'
    void arm_fir_init_f32(
    ^
    /Users/aw/Documents/Arduino/Teensy_Convolution_SDR_aw/Teensy_Convolution_SDR_aw.ino:3547:116: warning: invalid conversion from 'const float32_t* {aka const float*}' to 'float32_t* {aka float*}' [-fpermissive]
    arm_fir_init_f32 (&FIR_WFM_Q, FIR_WFM_num_taps, FIR_WFM_Coef, FIR_WFM_Q_state, (uint32_t)WFM_BLOCKS * BUFFER_SIZE);
    ^
    In file included from /Applications/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/Audio/analyze_fft256.h:32:0,
    from /Applications/Teensyduino.app/Contents/Java/hardware/teensy/avr/libraries/Audio/Audio.h:61,
    from /Users/aw/Documents/Arduino/Teensy_Convolution_SDR_aw/Teensy_Convolution_SDR_aw.ino:269:
    /Applications/Teensyduino.app/Contents/Java/hardware/teensy/avr/cores/teensy4/arm_math.h:1234:8: note: initializing argument 3 of 'void arm_fir_init_f32(arm_fir_instance_f32*, uint16_t, float32_t*, float32_t*, uint32_t)'
    void arm_fir_init_f32(
    ^
    Teensy_Convolution_SDR_aw: In function 'void loop()':
    Teensy_Convolution_SDR_aw:3786: warning: comparison between signed and unsigned integer expressions
    if (Q_in_L.available() > (WFM_BLOCKS) && Q_in_R.available() > (WFM_BLOCKS) && Menu_pointer != MENU_PLAYER)
    ^
    Teensy_Convolution_SDR_aw:3786: warning: comparison between signed and unsigned integer expressions
    if (Q_in_L.available() > (WFM_BLOCKS) && Q_in_R.available() > (WFM_BLOCKS) && Menu_pointer != MENU_PLAYER)
    ^
    Teensy_Convolution_SDR_aw:4049: warning: comparison between signed and unsigned integer expressions
    for (int i = 1; i < BUFFER_SIZE * WFM_BLOCKS; i++)
    ^
    Teensy_Convolution_SDR_aw:4402: warning: comparison between signed and unsigned integer expressions
    for (int i = 0; i < WFM_BLOCKS; i++)
    ^
    Teensy_Convolution_SDR_aw:4502: warning: comparison between signed and unsigned integer expressions
    if (Q_in_L.available() > N_BLOCKS + 0 && Q_in_R.available() > N_BLOCKS + 0 && Menu_pointer != MENU_PLAYER)
    ^
    Teensy_Convolution_SDR_aw:4502: warning: comparison between signed and unsigned integer expressions
    if (Q_in_L.available() > N_BLOCKS + 0 && Q_in_R.available() > N_BLOCKS + 0 && Menu_pointer != MENU_PLAYER)
    ^
    Teensy_Convolution_SDR_aw: In function 'void Zoom_FFT_exe(uint32_t)':
    Teensy_Convolution_SDR_aw:7761: warning: statement has no effect
    high_Zoom_buffer_x[i + high_Zoom_buffer_ptr];
    ^
    Teensy_Convolution_SDR_aw:7767: warning: comparison between signed and unsigned integer expressions
    if(flag_2nd_decimation >= high_Zoom_2nd_dec_rounds)
    ^
    Teensy_Convolution_SDR_aw: In function 'void FrequencyBarText()':
    Teensy_Convolution_SDR_aw:9140: warning: variable 'c' set but not used
    char txt[16], *c;
    ^
    Teensy_Convolution_SDR_aw: In function 'void buttons()':
    Teensy_Convolution_SDR_aw:9951: warning: variable 'PWR_Change' set but not used
    static uint8_t PWR_Change;
    ^
    Teensy_Convolution_SDR_aw: In function 'void show_menu()':
    Teensy_Convolution_SDR_aw:11287: warning: enumeration value 'RTTY_SHIFT_NUM' not handled in switch
    switch (rtty_ctrl_config.shift_idx)
    ^
    Teensy_Convolution_SDR_aw:11315: warning: enumeration value 'RTTY_SPEED_NUM' not handled in switch
    switch (rtty_ctrl_config.speed_idx)
    ^
    Teensy_Convolution_SDR_aw:11331: warning: enumeration value 'RTTY_STOP_NUM' not handled in switch
    switch (rtty_ctrl_config.stopbits_idx)
    ^
    Teensy_Convolution_SDR_aw: In function 'void alt_noise_blanking(float*, int, float*)':
    Teensy_Convolution_SDR_aw:14142: warning: comparison between signed and unsigned integer expressions
    } while ((search_pos < NB_FFT_SIZE - boundary_blank) && (impulse_count < 20)); // avoid upper boundary
    ^
    Teensy_Convolution_SDR_aw: In function 'uint8_t CwGen_CharacterIdFunc(uint32_t)':
    Teensy_Convolution_SDR_aw:16165: warning: comparison between signed and unsigned integer expressions
    for (int i = 0; i<CW_CHAR_CODES; i++)
    ^
    Teensy_Convolution_SDR_aw:16175: warning: comparison between signed and unsigned integer expressions
    for (int i = 0; i<CW_SIGN_CODES; i++)
    ^
    Teensy_Convolution_SDR_aw: In function 'void showDayOfWeek(uint8_t)':
    Teensy_Convolution_SDR_aw:16980: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==1) { Serial.printf("MONDAY ") ; termPutStr("MONDAY ") ;}
    ^
    Teensy_Convolution_SDR_aw:16981: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==2) { Serial.printf("TUESDAY ") ; termPutStr("TUESDAY ") ;}
    ^
    Teensy_Convolution_SDR_aw:16982: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==3) { Serial.printf("WEDNESDAY") ; termPutStr("WEDNESDAY") ;}
    ^
    Teensy_Convolution_SDR_aw:16983: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==4) { Serial.printf("THURSDAY ") ; termPutStr("THURSDAY ") ;}
    ^
    Teensy_Convolution_SDR_aw:16984: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==5) { Serial.printf("FRIDAY ") ; termPutStr("FRIDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:16985: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==6) { Serial.printf("SATURDAY ") ; termPutStr("SATURDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:16986: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==7) { Serial.printf("SUNDAY ") ; termPutStr("SUNDAY ") ;}
    ^
    Teensy_Convolution_SDR_aw: In function 'void dcfDisplayTime()':
    Teensy_Convolution_SDR_aw:17402: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==1) { termPutStr("MONDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:17403: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==2) { termPutStr("TUESDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:17404: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==3) { termPutStr("WEDNESDAY") ; }
    ^
    Teensy_Convolution_SDR_aw:17405: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==4) { termPutStr("THURSDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:17406: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==5) { termPutStr("FRIDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:17407: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==6) { termPutStr("SATURDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw:17408: warning: ISO C++ forbids converting a string constant to 'char*'
    if ( weekday==7) { termPutStr("SUNDAY ") ; }
    ^
    Teensy_Convolution_SDR_aw: In function 'void AudioEqualizer_display_response(uint16_t, float32_t*)':
    Teensy_Convolution_SDR_aw:18562: warning: variable 'centerIdx' set but not used
    int centerIdx;
    ^
    Teensy_Convolution_SDR_aw: In function 'void SSB_AUTOTUNE_est(int, float*, float*, float, float*, float*, float*)':
    Teensy_Convolution_SDR_aw:14442: warning: 'angl' may be used uninitialized in this function
    *pshift = *ppitch * angl / (2.*pi);
    ^
    Memory Usage on Teensy 4.0:
    FLASH: code:258364, data:158404, headers:9208 free for files:1605640
    RAM1: variables:201472, code:253960, padding:8184 free for local variables:60672
    RAM2: variables:329440 free for malloc/new:194848
    /Applications/Teensyduino.app/Contents/Java/hardware/tools/arm/arm-none-eabi/include/stdio.h

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