TIM定时采集ADC出现问题，希望大神解答

王子特 · 发表于 2016-7-11 16:07:05

void  Adc_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;
Adc_GPIO_Config();
RCC_ADCCLKConfig(RCC_PCLK2_Div6);
ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;//μ￥í¨μàé¨Ãè
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE; //×a»»ò»′Î
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC2 ;//Ñ¡Ôñ¶¨ê±Æ÷2μÄ2¶×½±è½Ï2×÷Îa×a»ˉía2¿′￥·￠
  ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
  ADC_InitStructure.ADC_NbrOfChannel = 1;
ADC_Init(ADC1, &ADC_InitStructure);
ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_55Cycles5);//2éÑùÖüÆúÎa55.5ÖüÆú
ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);

while(ADC_GetResetCalibrationStatus(ADC1));

ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));

ADC_ExternalTrigConvCmd(ADC1, ENABLE);
}
void tim(void)
{
TIM_TimeBaseInitTypeDef  TIM_TimeBaseStructure;
   TIM_OCInitTypeDef TIM_OCInitStructure;
RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2 , ENABLE);
TIM_DeInit(TIM2);
TIM_TimeBaseStructure.TIM_Period=10000;

TIM_TimeBaseStructure.TIM_Prescaler= 7199;
TIM_TimeBaseStructure.TIM_ClockDivision=TIM_CKD_DIV1;
TIM_TimeBaseStructure.TIM_CounterMode=TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

   TIM_OCInitStructure.TIM_OCMode = TIM_OCMode_PWM1;
   TIM_OCInitStructure.TIM_OutputState = TIM_OutputState_Enable;
   TIM_OCInitStructure.TIM_Pulse = 5000;
   TIM_OCInitStructure.TIM_OCPolarity = TIM_OCPolarity_Low;
   TIM_OC2Init(TIM2, & TIM_OCInitStructure);

TIM_InternalClockConfig(TIM2);
   TIM_OC2PreloadConfig(TIM2, TIM_OCPreload_Enable);
TIM_UpdateDisableConfig(TIM2, DISABLE);

   TIM_ClearFlag(TIM2, TIM_FLAG_Update);
TIM_ITConfig(TIM2, TIM_IT_Update,ENABLE);
TIM_Cmd(TIM2, ENABLE);
TIM2_NVIC_Configuration();
}
void TIM2_NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
void TIM2_IRQHandler(void)
{

if ( TIM_GetITStatus(TIM2 , TIM_IT_Update) != RESET )
{
TIM_ClearITPendingBit(TIM2 , TIM_FLAG_Update);

angle=ADC_GetConversionValue(ADC1);
            USART1_Send_Byte(angle);
      }
}
利用串口接收到的数据一直是0，单独的ADC采集也没问题