DAC与PVD中断问题

jay517217

为什么JTAG调试的时候DA有正常输出，去掉JLNK断电再上电后DA就没有输出了呢？好像stm32就不工作了，而我把PVD中断关掉后就正常了。

void EXTI_Configuration(void)

{

  EXTI_InitTypeDef EXTI_InitStructure;

  /* Configure EXTI Line16(PVD Output) to generate an interrupt on rising and

     falling edges */

  EXTI_ClearITPendingBit(EXTI_Line16);

  EXTI_InitStructure.EXTI_Line = EXTI_Line16;

  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;

  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising_Falling;

  EXTI_InitStructure.EXTI_LineCmd = ENABLE;

  EXTI_Init(&EXTI_InitStructure);

}

void PVD_IRQHandler(void)

{

  EXTI_ClearITPendingBit(EXTI_Line16); 

if(PWR_GetFlagStatus(PWR_FLAG_PVDO)) 

 {

PWR_ClearFlag(PWR_FLAG_PVDO);

//    EE_WriteVariable(0x5555, r);

EE_WriteVariable(0x6666, zero);

/* DAC channel2 Configuration */

  DAC_InitStructure.DAC_Trigger = DAC_Trigger_None;

  DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;

  DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;

  DAC_Init(DAC_Channel_2, &DAC_InitStructure);

  

  /* Enable DAC Channel2 */

  DAC_Cmd(DAC_Channel_2, ENABLE);

  /* Set DAC Channel2 DHR12L register */

    

  /* Start DAC Channel2 conversion by software */

  DAC_SoftwareTriggerCmd(DAC_Channel_2, ENABLE);

正点原子

是不是你板子电压不正常啊.

jay517217

回复【2楼】正点原子:
---------------------------------
断电再上电后量电压都没问题啊，3.3V有

jay517217

回复【2楼】正点原子:
---------------------------------
另外一个板子是定时器中断跟PVD中断一起的，就可以正常使用，但是DAC跟PVD一起就不能用，不知道怎么回事啊

正点原子

那就不清楚了,呵呵