RTOS/MSP432P401R: TI-RTOS internal temperature sensor example

Hello,

 Currently we do not have TI RTOS example.

So you will have to do something like this:

/***********************************************************
  Function: adcInit
*/
static void adcInit(void)
{
    HwiP_Params adcHwiParams;

    HwiP_Params_init(&adcHwiParams);
    adcHwiParams.arg = 0;
    adcHwiParams.priority = ~0;
    adcHwiParams.name = "ADC14";
    adcHwiHandle = HwiP_create(40, &Hwi_adc, &adcHwiParams);

    /* Initializing ADC (MCLK/1/1) with temperature sensor routed */
    ADC14_enableModule();
    ADC14_initModule(ADC_CLOCKSOURCE_MCLK, ADC_PREDIVIDER_1, ADC_DIVIDER_1,
            ADC_TEMPSENSEMAP);

    /* Configuring GPIO P4.2 (A11) for Analog In */
    GPIO_setAsPeripheralModuleFunctionInputPin(GPIO_PORT_P4,
            GPIO_PIN2, GPIO_TERTIARY_MODULE_FUNCTION);

    /* Configuring ADC Memory (ADC_MEM0 A22 (Temperature Sensor) and
     * ADC_MEM1 A11 in repeat mode).
     */
    ADC14_configureMultiSequenceMode(ADC_MEM0, ADC_MEM1, false);
    ADC14_configureConversionMemory(ADC_MEM0, ADC_VREFPOS_INTBUF_VREFNEG_VSS,
            ADC_INPUT_A22, false);

    ADC14_configureConversionMemory(ADC_MEM1, ADC_VREFPOS_INTBUF_VREFNEG_VSS,
            ADC_INPUT_A11, false);

    /* Configuring the sample/hold time for TBD */
    ADC14_setSampleHoldTime(ADC_PULSE_WIDTH_192,ADC_PULSE_WIDTH_192);

    /* Enabling sample timer in auto iteration mode and interrupts*/
    ADC14_enableSampleTimer(ADC_AUTOMATIC_ITERATION);

    /* Enabling the interrupt when a conversion on channel 1 (end of sequence)
     *  is complete and enabling conversions */
    ADC14_enableInterrupt(ADC_INT1);

    /* Setting reference voltage to 2.5 and enabling temperature sensor */
    REF_A_enableTempSensor();
    REF_A_setReferenceVoltage(REF_A_VREF2_5V);
    REF_A_enableReferenceVoltage();

    /* Grabbing the calibration values */
    cal30 = MAP_SysCtl_getTempCalibrationConstant(SYSCTL_2_5V_REF,
            SYSCTL_30_DEGREES_C);
    cal85 = MAP_SysCtl_getTempCalibrationConstant(SYSCTL_2_5V_REF,
            SYSCTL_85_DEGREES_C);
    calDifference = cal85 - cal30;

    HwiP_enableInterrupt(40);
    ADC14_enableConversion();
}

And the HWI (I'm using a semaphore to signal a task):

/***********************************************************
  Function: Hwi_adc
*/
void Hwi_adc(UArg arg)
{
    uint64_t status;

    status = MAP_ADC14_getEnabledInterruptStatus();
    MAP_ADC14_clearInterruptFlag(status);

    if (status & ADC_INT1)
    {
        temperatureReading = ((ADC14_getResult(ADC_MEM0) - cal30) * 55);
        SemaphoreP_post(tempSem);
    }
}

Hopefully this helps.

  David