EK-TM4C129EXL: EK-TM4C129EXL

Hi,

  Yes, you can first assign these 7 channels to Sequencer SS0. SS0 supports up to 8 channels. 

Once you assign your channels to the sequencer, it is just a matter to provide a trigger to ADC to start sampling. There are multiple ways to provide triggers. The simplest way to to use the processor to a software trigger. Other trigger sources can be GPIO, Comparator, PWM and timer. Please refer to the datasheet for details. 

Below is an example for three channels using processor trigger to read the three channels continuously. Please also go to C:\ti\TivaWare_C_Series-2.2.0.295\examples\peripherals\adc\single_ended.c for a single-ended channel example. 

    //
    // Display the setup on the console.
    //
    UARTprintf("ADC ->\n");
    UARTprintf("  Type: Single Ended\n");

    //
    // The ADC0 peripheral must be enabled for use.
    //
    SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);

    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);


    GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_3 | GPIO_PIN_2 | GPIO_PIN_1);

    ADCSequenceConfigure(ADC0_BASE, 0, ADC_TRIGGER_PROCESSOR, 0);

    ADCSequenceStepConfigure(ADC0_BASE, 0, 0, ADC_CTL_CH0 );

    ADCSequenceStepConfigure(ADC0_BASE, 0, 1, ADC_CTL_CH1 );

    ADCSequenceStepConfigure(ADC0_BASE, 0, 2, ADC_CTL_CH2 | ADC_CTL_IE |
                             ADC_CTL_END);

    ADCSequenceEnable(ADC0_BASE, 0);

    ADCIntClear(ADC0_BASE, 0);


    while(1)
    {

        //
        // Trigger the ADC conversion.
        //

        ADCProcessorTrigger(ADC0_BASE, 0);

        //
        // Wait for conversion to be completed.
        //
        while(!ADCIntStatus(ADC0_BASE, 0, false))
        {
        }

        //
        // Clear the ADC interrupt flag.
        //
        ADCIntClear(ADC0_BASE, 0);

        //
        // Read ADC Value.
        //
        ADCSequenceDataGet(ADC0_BASE, 0, pui32ADC0Value);

        //
        // Display the AIN0 (PE3) digital value on the console.
        //
        UARTprintf("AIN0 = %4d\n", pui32ADC0Value[0]);
        UARTprintf("AIN1 = %4d\n", pui32ADC0Value[1]);
        UARTprintf("AIN2 = %4d\n", pui32ADC0Value[2]);

    }