3s811,如何打开总中断？

给你一段代码，参考一下吧

这个是处理器触发中断采样

   /*使能ADC外设*/

   SysCtlPeripheralEnable(SYSCTL_PERIPH_ADC);

   /*设置ADC采样速率*/

   SysCtlADCSpeedSet(SYSCTL_ADCSPEED_125KSPS);

   ADCSequenceDisable(ADC_BASE, 0);

   /*配置采样序列*/

   ADCSequenceConfigure(ADC_BASE, 0, ADC_TRIGGER_PROCESSOR, 0);

   /*硬件过采样*/

   ADCHardwareOversampleConfigure(ADC_BASE, 16);

   /*采样步进设置*/

    ADCSequenceStepConfigure(ADC_BASE, 0, 0, ADC_CTL_CH0);

   ADCSequenceStepConfigure(ADC_BASE, 0, 1, ADC_CTL_CH1);

   ADCSequenceStepConfigure(ADC_BASE, 0, 2,   ADC_CTL_CH2);

   ADCSequenceStepConfigure(ADC_BASE, 0, 3, ADC_CTL_CH3);

   ADCSequenceStepConfigure(ADC_BASE, 0, 4,  ADC_CTL_TS | ADC_CTL_END | ADC_CTL_IE);

   ADCSequenceEnable(ADC_BASE, 0);

   ADCIntEnable(ADC_BASE, 0);

    /*ADC中断使能*/

    IntEnable(INT_ADC0);