因系统要求需升级ADC的采样方式(以前方式：扫描方式，TIMER2触发ADC软启动，2通道规则序列，DMA传完中断)，为了进一步实现两路信号的同步性能，采样STM32 双ADC同步规则转换。(timer2触发ADC软启动，2个单通道规则序列，DMA完成中断)

问题：

1：只能看到ADC1通道的数据。ADC2通道的数据貌似在ADC1_DR中的高16位中无法看到。

============================

//初始化DMA_ADC

void ADCWithDMAInit(void)

{

//DMA init;  Using DMA channel 1

DMA_InitTypeDef DMA_InitStructure;

/* 允许 DMA1 */

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

/* DMA1 channel1 configuration ----------------------------------------------*/

DMA_DeInit(DMA1_Channel1);

DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;

DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&VOLT_SIGNAL;

DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

DMA_InitStructure.DMA_BufferSize =1;

DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;// 全字节

DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;         // 全字节

DMA_InitStructure.DMA_Mode =DMA_Mode_Circular;

DMA_InitStructure.DMA_Priority = DMA_Priority_High;

DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;

DMA_Init(DMA1_Channel1, &DMA_InitStructure);

/* Enable DMA1 channel1 */

//DMA_Cmd(DMA1_Channel1, ENABLE);

DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE); //DMA1传输完成中断

DMA_Cmd(DMA1_Channel1, ENABLE); //正式允许DMA

}

void ADC_Config(void)

{

ADC_InitTypeDef ADC_InitStructure;

GPIO_InitTypeDef GPIO_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

TIM_TimeBaseInitTypeDef   TIM_TimeBaseStructure;

//        TIM_OCInitTypeDef         TIM_OCInitStructure;

//        DMA_InitTypeDef DMA_InitStructure;

ADCWithDMAInit();

//DMA 中断设置

NVIC_InitStructure.NVIC_IRQChannel=DMA1_Channel1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;

NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;

NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;

NVIC_Init(&NVIC_InitStructure);

/*******************TIM**************/

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC,ENABLE);  //GPIOAC时钟

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //timer2时钟

TIM_TimeBaseStructure.TIM_Period =7031;         //1.408khz

TIM_TimeBaseStructure.TIM_Prescaler = 9;

TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;

TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;

//TIM_TimeBaseStructure.TIM_RepetitionCounter =0;

TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

/* Enable the TIM2 global Interrupt */

NVIC_InitStructure.NVIC_IRQChannel = TIM2_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 6;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 6;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

NVIC_Init(&NVIC_InitStructure);

//使能Time2 更新中断。即溢出中断

//TIM_ITConfig(TIM1, TIM_IT_Update, ENABLE);

TIM_ITConfig(TIM2, TIM_IT_Update, ENABLE);

/* Configure and enable ADC interrupt */

//NVIC_InitStructure.NVIC_IRQChannel = ADC1_2_IRQn;

//NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

//NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

//NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

//NVIC_Init(&NVIC_InitStructure);

/*******************ADC**************/

RCC_ADCCLKConfig(RCC_CFGR_ADCPRE_DIV6);//ADC时钟PLCK2的6分频 12M。ADC最大时钟不能超过14M!

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1|RCC_APB2Periph_ADC2, ENABLE);

//A口有1个通道

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOA,&GPIO_InitStructure);

ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;       //ADC1工作在独立模式 同步规则模式

ADC_InitStructure.ADC_ScanConvMode =DISABLE;             //使能模数转换工作在扫描模式(多通道)

ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;       //模数转换工作在正常模式

ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;    //软启动触发启动

ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;   //ADC数据右对齐

ADC_InitStructure.ADC_NbrOfChannel = 1;                  //顺序进行规则转换的ADC通道的数目

ADC_Init(ADC1, &ADC_InitStructure);                      //根据ADC_InitStructure中指定的参数初始化外设ADC1的寄存?

//ADC_Init(ADC2, &ADC_InitStructure);

/* Enable ADC1 EOC interrupt */

//ADC_ITConfig(ADC1, ADC_IT_EOC, ENABLE);

//设置指定ADC的规则组通道，设置它们的转化顺序和采样时间(取最大值)//增加通道到规则队列中

ADC_RegularChannelConfig(ADC1, ADC_Channel_1 , 1, ADC_SampleTime_239Cycles5); //PA1

//C口有1个通道

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;

GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

GPIO_Init(GPIOC,&GPIO_InitStructure);

ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;       //ADC1工作在独立模式 同步规则模式

ADC_InitStructure.ADC_ScanConvMode =DISABLE;             //使能模数转换工作在扫描模式(多通道)

ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;       //模数转换工作在正常模式

ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;    //软启动触发启动

ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;   //ADC数据右对齐

ADC_InitStructure.ADC_NbrOfChannel = 1;                  //顺序进行规则转换的ADC通道的数目

\

ADC_Init(ADC2, &ADC_InitStructure);                      //根据ADC_InitStructure中指定的参数初始化外设ADC1的寄存?

ADC_RegularChannelConfig(ADC2, ADC_Channel_12 , 1, ADC_SampleTime_239Cycles5);//PC2

/* Enable ADC2 external trigger conversion */

ADC_ExternalTrigConvCmd(ADC2, ENABLE);

/* Enable ADC1 DMA*/

ADC_DMACmd(ADC1, ENABLE);

/* Enable ADC1 external trigger */

//ADC_ExternalTrigConvCmd(ADC1, ENABLE);

/* Enable ADC1 */

ADC_Cmd(ADC1, ENABLE);

/* Enable ADC2 */

ADC_Cmd(ADC2, ENABLE);

/* Enable ADC1 reset calibaration register */

ADC_ResetCalibration(ADC1);

/* Check the end of ADC1 reset calibration register */

while(ADC_GetResetCalibrationStatus(ADC1));

/* Start ADC1 calibaration */

ADC_StartCalibration(ADC1);

/* Check the end of ADC1 calibration */

while(ADC_GetCalibrationStatus(ADC1));

/* TIM1 counter enable */

TIM_Cmd(TIM2, ENABLE);

/* TIM1 main Output Enable */

//TIM_CtrlPWMOutputs(TIM2, ENABLE);

//for()

}