OPT3101-SDK: Performing Illum Crosstalk

Kailyn,

  Is this a custom board or are you using the EVM? Any information about your setup would be great as well. 

Thank you.

Hi,

This is a new design.

The software calls dev.perUnitFactoryUpdateIllumXtalk(); in main.cpp for testing.

void OPT3101::device::initialize(void)
{
    // List of registers to initialize OPT3101 device after power-up

    this->reg.force_en_slave = 1; // add code!!!

    this->reg.tg_ovl_window_start = 7000; // //Overload flab observation window
    this->reg.en_temp_conv = 1;           // //Enables the internal

    this->reg.clip_mode_fc = 1;     // //Enables Clip mode for Frequency correction
    this->reg.clip_mode_temp = 0;   // //Disables Clip mode for Temp coff phase correction
    this->reg.clip_mode_offset = 0; // //Disables Clip mode for phase offset correction
    this->reg.iq_read_data_sel = 3; // //Enables 16 bit frame counter
    this->reg.iamb_max_sel = 14;    // //Sets maximum ambient support
    this->reg.en_temp_corr = 1;     // //Enables Temperature Correction
    this->reg.gpio1_obuf_en = 1;    // //Enabled output buffer on GPIO1 pin
    this->reg.gpo1_mux_sel = 2;     // //select dig_gpo_0 on gpio1
    this->reg.dig_gpo_sel0 = 9;     // //Select Data Ready on dig_gpo_0

    this->reg.num_sub_frames = 255;       // 255;   !!!     // //Sub frames count
    this->reg.num_avg_sub_frames = 127;    // 127;  !!!  // //Average frames count
    this->reg.xtalk_filt_time_const = 3;  // //Crosstalk filter time constant
    this->reg.tg_seq_int_start = 9850;    // //Sequence Start
    this->reg.tg_seq_int_end = 9858;      // //Sequence End
    this->reg.tg_seq_int_mask_start = 127; // !!! 127 //Same as AvgFrame Count
    this->reg.tg_seq_int_mask_end = 127;   // !!! 127 //Same as AvgFrame Count

    this->reg.hdr_thr_high = 25500; // //High Threshold
    this->reg.hdr_thr_low = 5875;   // //Low Threshold
    this->reg.en_adaptive_hdr = 1;  // 1 !!! //Enables adaptive HDR feature

    this->reg.illum_dac_h_tx0 = 31;  // //High Current settings [173.6mA:5.6mA X 31]
    this->reg.illum_scale_h_tx0 = 0; // //Illum scale for H [173.6mA:5.6mA X 31]

    this->reg.illum_dac_l_tx0 = 31;  // //High Current settings [043.4mA:1.4mA X 31]
    this->reg.illum_scale_l_tx0 = 3; // //Illum scale for H [043.4mA:1.4mA X 31]

    this->reg.illum_dac_h_tx1 = 31;  // //High Current settings [173.6mA:5.6mA X 31]
    this->reg.illum_scale_h_tx1 = 0; // //Illum scale for H [173.6mA:5.6mA X 31]

    this->reg.illum_dac_l_tx1 = 31;  // //High Current settings [043.4mA:1.4mA X 31]
    this->reg.illum_scale_l_tx1 = 3; // //Illum scale for H [043.4mA:1.4mA X 31]

    this->reg.illum_dac_h_tx2 = 31;  // //High Current settings [173.6mA:5.6mA X 31]
    this->reg.illum_scale_h_tx2 = 0; // //Illum scale for H [173.6mA:5.6mA X 31]

    this->reg.illum_dac_l_tx2 = 31;  // //High Current settings [043.4mA:1.4mA X 31]
    this->reg.illum_scale_l_tx2 = 3; // //Illum scale for H [043.4mA:1.4mA X 31]

    this->reg.tx_seq_reg = 2340; // //Setting TX Switching order
    this->reg.en_tx_switch = 1;  // 1 charge!!! //Enable TX Switching order

    this->reg.sel_tx_ch = 0;


    this->reg.ILLUM_DC_CURR_DAC = 4;  //!!! add , bias current x 0.5mA

    this->reg.tg_en = 1; // //Enables Timing Generator

    this->configurationFlags_xtalkFilterTau = 3;   // //This is not a register but a settings flag for the SDK
    this->configurationFlags_monoshotMode = false; // //This is not a register but a settings flag for the SDK
    this->configurationFlags_xtalkSettlingOneTauInMilliSeconds =
        512; // //This is not a register but a settings flag for the SDK
    this->configurationFlags_xtalkSettlingOneTauInDataReadyCounts =
        8;                                                   // //This is not a register but a settings flag for the SDK
    this->configurationFlags_frameTimeInMilliSeconds = 64;   // //This is not a register but a settings flag for the SDK
    this->configurationFlags_avgFrameCountExponentOfTwo = 7; // //This is not a register but a settings flag for the SDK

    // tx2 xtalk compensation
    // this->reg.EN_CTALK_FB_CLK=1;
    // this->reg.EN_CALIB_CLK=1;
    // this->reg.calib_curr1_en_I=1;
    // this->reg.calib_curr1_gain_sel=0;
    // this->reg.calib_curr1_DAC_I=4;
    // this->reg.calib_curr1_inv_CLK_I=0;
}

void OPT3101::device::perUnitFactoryUpdateIllumXtalk()
{

    this->reset(); ///* Resets the device calling OPT3101::device::reset method

    host.printf("INFO::Writing Initialization sequence I2C registers\r\n");
    this->initialize(); ///* Initializes the OPT3101 device by calling OPT3101::device::initialize method
    host.printf("INFO::Device Initialization Completed\r\n");
    this->measureAndCorrectInternalCrosstalk(&this->calibration->internalCrosstalk[0]); ///* Calls method OPT3101::device::measureAndCorrectInternalCrosstalk with argument OPT3101::calibrationC::internalCrosstalk
    this->calibration->internalCrosstalk[0].report(); ///* Calls the method OPT3101::crosstalkC::report for debug and data analysis

    this->measureIllumCrosstalkSet(false);
    this->loadIllumCrosstalkSet(false); ///* Calls the OPT3101::device::loadIllumCrosstalkSet with false argument so that method to load all illum crosstalk settings from the OPT3101::device::crosstalk::illumCrosstalk member

    // this->calibrationSession_perUnitFactoryCalibrationWriteRegisterDataToNonVolatileMemory(); ///* Calls the OPT3101::device::calibrationSession_perUnitFactoryCalibrationWriteRegisterDataToNonVolatileMemory to store the calibration data to a non-volatile memory
}

Regards,

Annie

Annie,

  I am reviewing your settings. I always check hardware first. My first thought is to verify the PCB and supplies, then check communications, I see you have pull up resistors. Verify they are being pulled up. I am going to suggest verifying the polarity of the emitter and the photodiode just in case. I will need time to go through these settings and see what else comes to mind. Verify you can talk to the part correctly by reading out some registers and check the values. 

If this is your own board, I assume you have written your own code to talk the the OPT3101. You may have an initiliazition issue. Let me know how some of this works and I will see if I can find something simple to verify that you are communicating.  

Hi Gordon，

Thank you very much for your reply.

This is the schematic diagram of my test system. I am checking my PCB hardware problem.

The IIC communication is observing the correct waveform and data through the oscilloscope.

Other hardware problems are under investigation. When the materials are purchased back, SFH4556 and SFH203PFA will be replaced with the corresponding devices in EVM for confirmation.

Best regards

kailyn