软件触发AD注入组转换，结果总是0

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楼主

970253146| 高级技术员

楼主 | 2017-3-30 21:59 | 只看该作者回帖奖励

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软件, AD, 触发, dc, ADC

附上一段软件触发AD注入组采样的程序，不知为何无论怎么改变引脚的电位，出来的数值都是0

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_ADC1|RCC_APB2Periph_GPIOC, ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD|RCC_APB2Periph_USART1, ENABLE );    //Ê¹ÄÜPORTAÍ¨µÀÊ±ÖÓ

      GPIO_StructInit(&GPIO_InitStructure);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 ;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
GPIO_Init(GPIOC, &GPIO_InitStructure);

   ADC_DeInit(ADC1);
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
ADC_InitStructure.ADC_ScanConvMode = DISABLE;
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
ADC_InitStructure.ADC_NbrOfChannel = 2;
ADC_Init(ADC1, &ADC_InitStructure);

ADC_ITConfig(ADC1,ADC_IT_EOC,DISABLE);
      ADC_InjectedSequencerLengthConfig(ADC1,1);
      ADC_InjectedChannelConfig(ADC1, ADC_Channel_11, 1, ADC_SampleTime_55Cycles5);

   ADC_ExternalTrigInjectedConvConfig(ADC1, ADC_ExternalTrigInjecConv_None);
     ADC_ExternalTrigInjectedConvCmd(ADC1,DISABLE);

ADC_Cmd(ADC1, ENABLE);
ADC_ResetCalibration(ADC1);
while(ADC_GetResetCalibrationStatus(ADC1));
ADC_StartCalibration(ADC1);
while(ADC_GetCalibrationStatus(ADC1));

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