F28M35 ADC转换问题第7通道总是0

F28M35的ADC第七通道（ADCINA7/ADCINB7），在进行同时转换时总是为0，无论实际的模拟输入是多少。其它的通道就没有这个问题。

Adc1Regs.ADCSAMPLEMODE.bit.SIMULEN0 = 1;

Adc1Regs.ADCCTL1.bit.INTPULSEPOS = 1; // EOC trips after conversion result is latched 
Adc1Regs.INTSEL1N2.bit.INT1E = 1; // Enabled ADCINT1
Adc1Regs.INTSEL1N2.bit.INT1CONT = 0; // Disable ADCINT1 Continuous mode
Adc1Regs.INTSEL1N2.bit.INT1SEL = 1;

 Adc1Regs.ADCSOC0CTL.bit.CHSEL       = 7; 

 AnalogSysctrlRegs.TRIG1SEL.all     = 8;       // Assigning EPWM2SOCA to TRIGGER 1 of analog subsystem
 Adc1Regs.ADCSOC0CTL.bit.TRIGSEL    = 5;