3.2.3.1 DIAG_BANDGAP_ReferenceVoltage

Returns the status of the BANDGAP_REFERENCE_VOLTAGE diagnostic

DIAG_TEST_STATUS 
DIAG_BANDGAP_ReferenceVoltage
(
   void
);

Diagnostic verifies the following faults do not exist

  • Voltage Output Incorrect
  • Cannot be Connected To ADC

Operating Mode

  • Interface can be used at POST and ‘On Demand’

  • If running the test On Demand, since it uses ADC) then if ADC1 is being used it must be disabled and reenabled before and after the test. Also if the VREF settings must be saved and restored if they are not the default. See example below:

    uint32_t vref;

    vref = SUPC_REGS->SUPC_VREF; // save off current value

    SUPC_REGS->SUPC_VREF = 0; // revert to POST condition

    ADC1_Disable(); // must disable, then re-enable ADC1 across ADC0 test

    ret = DIAG_BANDGAP_ReferenceVoltage(); // uses ADC0

    ADC1_Enable();

    SUPC_REGS->SUPC_VREF = vref; // restore

Precondition
  • none

Parameters

  • adc_periph - enum value for which ADC peripheral to be tested

Returns

  • DIAG_TEST_PASSED if no faults were found, otherwise, DIAG_TEST_FAILED.