TIMER1 控制 ADC 无效果

你好， 我在用timer1 控制 ADC。 Timer1 设置为 output compare mode on channel 0,  ADC 每次开始是由timer1 channel 0 compare event来控制的。具体代码如下：

  PERCFG &= ~0x40; // peripheral configure 0 
  P0DIR |= 0x04; // P0_2 = output
  P0SEL |= 0x04; // Peripheral function on P0_2
  
  T1CTL = 0x0E;        // modulo
  T1CCTL0 = 0x54;
  T1CC0L = 0xFA; //250 times 0.004ms = 1ms
  T1CC0H = 0x00; 
  
  T1CCTL0 |= 0x40; //enable interrupt
  T1CTL |= 0x10;

ADC的配置如下

void AdcInit(void)// interal temp sensor
{
ADCCON1 = 0x23;// triggered by timer1 channel 0
ADCCON3 = 0x3e;// temp sensor
TR0 = 0x01;
ATEST = 0x01;
}