STM32F103RB ADC 问题

赵小辉提问时间：2017-1-2 15:26 /

大家好：
我设置了STM32F103RB ，QFP64， PC0,PC1,PC2,PC3 这三个引脚我设置为模拟输入引脚，采用规则采样，单次模式，（中断完成后，用软件再设置ADON）
读出来的数据，6FF.（相当于1.2v) 用万用表量测的电压都是0V) , 请大家帮我看看。

source code 如下:

static void ADCx_Mode_Config(void)
{
ADC_InitTypeDef ADC_InitStructure;

// ´ò¿ªADCÊ±ÖÓ
macADC_APBxClock_FUN ( macADC_CLK, ENABLE );

// ADC Ä£Ê½ÅäÖÃ
// Ö»Ê¹ÓÃÒ»¸öADC£¬ÊôÓÚµ¥Ä£Ê½
ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;

// ½ûÖ¹É¨ÃèÄ£Ê½£¬¶àÍ¨µÀ²ÅÒª£¬µ¥Í¨µÀ²»ÐèÒª
//ADC_InitStructure.ADC_ScanConvMode = DISABLE ;
ADC_InitStructure.ADC_ScanConvMode = ENABLE;

// Á¬Ðø×ª»»Ä£Ê½
ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
//ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;

// ²»ÓÃÍâ²¿´¥·¢×ª»»£¬Èí¼þ¿ªÆô¼´¿É
ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;

// ×ª»»½á¹ûÓÒ¶ÔÆë
ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;

// ×ª»»Í¨µÀ4¸ö
ADC_InitStructure.ADC_NbrOfChannel = macNOFCHANEL;

// ³õÊ¼»¯ADC
ADC_Init(macADCx, &ADC_InitStructure);

// ÅäÖÃADCÊ±ÖÓ£ÎªPCLK2µÄ8·ÖÆµ£¬¼´9MHz
RCC_ADCCLKConfig(RCC_PCLK2_Div8);

// ÅäÖÃ ADC Í¨µÀ×ª»»Ë³ÐòÎª1£¬µÚÒ»¸ö×ª»»£¬²ÉÑùÊ±¼äÎª55.5¸öÊ±ÖÓÖÜÆÚ
ADC_RegularChannelConfig(macADCx, macADC_CHANNEL10, 1, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(macADCx, macADC_CHANNEL11, 2, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(macADCx, macADC_CHANNEL12, 3, ADC_SampleTime_55Cycles5);
ADC_RegularChannelConfig(macADCx, macADC_CHANNEL13, 4, ADC_SampleTime_55Cycles5);

// ADC ×ª»»½áÊø²úÉúÖÐ¶Ï£¬ÔÚÖÐ¶Ï·þÎñ³ÌÐòÖÐ¶ÁÈ¡×ª»»Öµ
ADC_ITConfig(macADCx, ADC_IT_EOC, ENABLE);

// ¿ªÆôADC £¬²¢¿ªÊ¼×ª»»
ADC_Cmd(macADCx, ENABLE);

// ³õÊ¼»¯ADC Ð£×¼¼Ä´æÆ÷
ADC_ResetCalibration(macADCx);
// µÈ´ýÐ£×¼¼Ä´æÆ÷³õÊ¼»¯Íê³É
while(ADC_GetResetCalibrationStatus(macADCx));

// ADC¿ªÊ¼Ð£×¼
ADC_StartCalibration(macADCx);
// µÈ´ýÐ£×¼Íê³É
while(ADC_GetCalibrationStatus(macADCx));

// ÓÉÓÚÃ»ÓÐ²ÉÓÃÍâ²¿´¥·¢£¬ËùÒÔÊ¹ÓÃÈí¼þ´¥·¢ADC×ª»»
ADC_SoftwareStartConvCmd(macADCx, ENABLE);
}