problem using adc in Tiva microcontroller TM4C129X

Dear all

I'm quite new using Ti Tiva microcontrroller series.

I'm the demo board DK-TM4C129x and I'm trying to perform an analog to digital conversion using TivaWare API.

I followed the example found on the pack but my ADC module perform only one conversion then stop warking and microprocessor wait forever for the next conversion complete.

I attached my code in the fallowing.

Thanks for all

M

//-----------------------------------------------------------------------------------------

//*****************************************************************************
// ADC0 init
//*****************************************************************************

void InitADC0(void)
{

    SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC0);              //Enable ADC0
    SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOE);            // enable PORTE
    
    GPIOPinTypeADC(GPIO_PORTE_BASE, GPIO_PIN_2);     
  
    ADCSequenceConfigure(ADC0_BASE,3,ADC_TRIGGER_PROCESSOR,0);
    
    ADCSequenceStepConfigure(ADC0_BASE, 3, 0, ADC_CTL_IE |
                             ADC_CTL_END| ADC_CTL_CH1);                 
                                                                                                      
    ADCSequenceEnable(ADC0_BASE,3);                                   //Enables sequence
                                               
}


//*****************************************************************************
// main
//*****************************************************************************

int main(void)
{
   
  
    SysCtlClockSet(SYSCTL_SYSDIV_10 | SYSCTL_USE_PLL | SYSCTL_OSC_MAIN |
                   SYSCTL_XTAL_25MHZ);

    while(1)
    {
            ADCProcessorTrigger(ADC0_BASE, 3);
        
            while(!ROM_ADCIntStatus(ADC0_BASE, 3, false)){}    // firmare stop here
                
             ADCIntClear(ADC0_BASE, 3);//clears interrupt flag
                    
            ADCSequenceDataGet(ADC0_BASE, 3, &ADC0Value);         

              SysCtlDelay(1000000);

        }

}