CCS/LAUNCHXL-F28069M: Potentiometer read, puts out wrong values.

Tool/software: Code Composer Studio

Hello,

I followed the Motorware_hal_tutorial.pdf and added a Potentiometer read, but it gives me wrong values ,is constantly changing and the start value is 0.2, but the poti is set to 0.

I am using a LaunchPad-F28069M and BoostXL-DRV8301.

Does anyone if it is interfering with some other values or what is going on?

I changed the Input pin to B3, B0 is used.

  // Potentiometer
  // Configure it so that ADCINT1 will trigger a potentiometer conversion
  ADC_setSocChanNumber(obj->adcHandle,ADC_SocNumber_8,ADC_SocChanNumber_B3);
  ADC_setupSocTrigSrc(obj->adcHandle, ADC_SocNumber_8, ADC_Int1TriggersSOC);
  ADC_setSocSampleDelay(obj->adcHandle,ADC_SocNumber_8,ADC_SocSampleDelay_9_cycles);

I added the gPotentiometer = HAL_readPotentiometerData(halHandle) to the updateGloablVariable():

void updateGlobalVariables_motor(CTRL_Handle handle)
{
  CTRL_Obj *obj = (CTRL_Obj *)handle;

  // get the speed estimate
  gMotorVars.Speed_krpm = EST_getSpeed_krpm(obj->estHandle);

  // get the real time speed reference coming out of the speed trajectory generator
  gMotorVars.SpeedTraj_krpm = _IQmpy(CTRL_getSpd_int_ref_pu(handle),EST_get_pu_to_krpm_sf(obj->estHandle));

  // get the torque estimate
  gMotorVars.Torque_Nm = USER_computeTorque_Nm(handle, gTorque_Flux_Iq_pu_to_Nm_sf, gTorque_Ls_Id_Iq_pu_to_Nm_sf);

  // get the magnetizing current
  gMotorVars.MagnCurr_A = EST_getIdRated(obj->estHandle);

  // get the rotor resistance
  gMotorVars.Rr_Ohm = EST_getRr_Ohm(obj->estHandle);

  // get the stator resistance
  gMotorVars.Rs_Ohm = EST_getRs_Ohm(obj->estHandle);

  // get the stator inductance in the direct coordinate direction
  gMotorVars.Lsd_H = EST_getLs_d_H(obj->estHandle);

  // get the stator inductance in the quadrature coordinate direction
  gMotorVars.Lsq_H = EST_getLs_q_H(obj->estHandle);

  // get the flux in V/Hz in floating point
  gMotorVars.Flux_VpHz = EST_getFlux_VpHz(obj->estHandle);

  // get the flux in Wb in fixed point
  gMotorVars.Flux_Wb = USER_computeFlux(handle, gFlux_pu_to_Wb_sf);

  // get the controller state
  gMotorVars.CtrlState = CTRL_getState(handle);

  // get the estimator state
  gMotorVars.EstState = EST_getState(obj->estHandle);

  // Get the DC buss voltage
  gMotorVars.VdcBus_kV = _IQmpy(gAdcData.dcBus,_IQ(USER_IQ_FULL_SCALE_VOLTAGE_V/1000.0));

  gPotentiometer = HAL_readPotentiometerData(halHandle);

  return;
} // end of updateGlobalVariables_motor() function