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TDC1000-TDC7200EVM: TDC1000-TDC7200EVM

Peter Kostadinov
Prodigy 230 points

Part Number: TDC1000-TDC7200EVM

Hello all,

Board is TDC1000-TDC7200EVM, sensor 1MHz.I need to measure fluid level. The sensor is glued on the bottom of the plastic tank, fluid is water and level of water is up to 20cm. Unfortunately, all my attempts to measure level were unsuccessful - level is always 2.18cm and do not changed with changing of water level. I do not see the difference with scope too. Probably there are incorrect settings, but i did not succeed to set the correct one. Online settings generator did not help me too.

Can anyone send me working settings for my case.Thanks in advance.

Best regards,

Peter

  • 0
    Prodigy 10 points
    I've got the same issue. TOF remains the same on fluid level change. I'm using 1 MHz sensor and TDC1000-TDC7200EVM. I've tried with on board 8 MHz oscillator and with CPU clock the results are the similar - I have not any success.
  • 0
    TI__Mastermind 31655 points

    Please refer to this application note that describes many of the register settings and key things to watch out for when using the TDC1000 to measure fluid level: www.ti.com/.../snaa270.pdf

    The app note is based on the TDC1000-C2000EVM, but is applicable to the TDC1000-TDC7200EVM as well.

    I am attaching some settings that should get you started as well. 

    Fullscreen 0160.TDC1000_Setup.txt Download 
    TDC1000_Config0                         44
TDC1000_Config1                         41
TDC1000_Config2                         00
TDC1000_Config3                         0C
TDC1000_Config4                         00
TDC1000_TOF-1                           40
TDC1000_TOF-0                           00
TDC1000_Error_Flags                     00
TDC1000_Timeout                         1B
TDC1000_Clock_Rate                      00
TDC1000_Conts_Trigger                   00
TDC7200_Config1                         00
TDC7200_Config2                         00
TDC7200_Interrupt_Status                00
TDC7200_Interrupt_Mask                  00
TDC7200_Coarse_Cntr_Ov_H                FF
TDC7200_Coarse_Cntr_Ov_L                FF
TDC7200_Clock_Cntr_Ov_H                 FF
TDC7200_Clock_Cntr_Ov_L                 FF
TDC7200_Clock_Cntr_Stop_Mask_H          00
TDC7200_Clock_Cntr_Stop_Mask_L          00
TRIGGER_UPDATE_FREQ                     0001
TDC_AVG/STDEV_NUM_ELEMS                 000A
SAVE_GRAPH_DATA_TO_FILE                 00
FLOW_MODE_SELECT                        00
Y-SCALE_CENTER                          0032
X-SCALE_RANGE                           0032
MEASURE_RTD1                            00
SAVE_RESULT_REGR_TO_FILE                00
GRAPH_MULTI_STOPS                       00
TDC_SELECT                              00
TEMP_RTD_SELECT                         00
TEMP_RTD_MODE                           01
TEMP_AVG/STDEV_NUM_ELEMS                000A
SAVE_TEMP_DATA                          00
GRAPH_YMAX_DATA                         00000000004C4B40
GRAPH_YMIN_DATA                         0000000000030D40
TDC1000-HV_DRV_EN1                      00
TDC1000-HV_DRV_EN2                      00
HV_DRV_EN1_Period                       001E
HV_DRV_EN2_Period                       001E
ENABLE_POWER_CYCLE                      00
CLK_FREQ_(1-16MHz)                      8.000000
CLK_SOURCE_SEL                          00
CPU_CLK_FREQ                            05
CPU_CLK_EN                              00
TDC1000-HV_BST_PWR_EN                   00
HV_BST_PWR_EN_Period                    0000
FWD2REV_FLOW_DELAY                      0000
TDC1000-IMPE_MATCH_EN                   00
ENABLE_UART_STREAM                      00
ENABLE_MSP430TIMER_TDC                  00

  • 0 in reply to Scott Cummins
    Prodigy 230 points
    Hi Scott,

    Thank you very much for your help.
    I'm familiar with the application note snaa270, but was unable to find the proper configuration. Unfortunately, settings file "0160.TDC1000_Setup.txt" you sent to me did not make improvement too. Measured tank level now is 0 cm. regardless if there is water or not.

    Best Regards,
    Peter