RTOS/SIMPLELINK-CC2640R2-SDK: ADC task called SetParameter trigger ICall_abort

Tool/software: TI-RTOS

Hi, I created a ADC sample task  in Project Zero example, refered to I2C driver like:http://dev.ti.com/tirex/content/simplelink_academy_cc2640r2sdk_1_13_03_11/modules/ble_02_thermostat/ble_02_thermostat.html#example-service-generator  

But now ,I found when the MyAdc_SetParameter function trigger ICall_abort function .Could you tell me why and how to resolve this problem?

Below is some code about ADC task:

static void adcTaskFxn(UArg a0, UArg a1)
{
       ADC_Handle adc;
       ADC_Params params;
       int_fast16_t res;
       UInt key;

       ADC_Params_init(&params);
      adc = ADC_open(CC2640R2_LAUNCHXL_ADC4, &params);
      if (adc == NULL) {
           Log_error0("***ERROR*** >> Error initializing ADC channel 0\n");
           Task_exit();
       }

 Error_init(&eb);
/* Default instance configuration params */
readEvent = Event_create(NULL, &eb);
if (readEvent == NULL) {
Log_error0("***ERROR*** >> EVENT CREATE FAILED");
Task_exit();
}

while (1) {

Event_pend(readEvent, Event_Id_NONE, Event_Id_00, BIOS_WAIT_FOREVER);
res = ADC_convert(adc, &adcValue);
if (res == ADC_STATUS_SUCCESS) {
/*
* Extract degrees C from the received data; see sensor datasheet.
*/
key = Hwi_disable();
adcValue0MicroVolt = ADC_convertRawToMicroVolts(adc, adcValue);
Hwi_restore(key);

}

MyAdc_SetParameter( MYADC_MYADCDATA, ADC_DATA_SIZE, &adcValue0MicroVolt );

Log_info1("ADC channel 0 convert result: %d uV\n", adcValue0MicroVolt);

}

}