因系統(tǒng)要求需升級(jí)ADC的采樣方式(以前方式：掃描方式，TIMER2觸發(fā)ADC軟啟動(dòng)，2通道規(guī)則序列，DMA傳完中斷)，為了進(jìn)一步實(shí)現(xiàn)兩路信號(hào)的同步性能，采樣STM32 雙ADC同步規(guī)則轉(zhuǎn)換。(timer2觸發(fā)ADC軟啟動(dòng)，2個(gè)單通道規(guī)則序列，DMA完成中斷)

問(wèn)題：

1：只能看到ADC1通道的數(shù)據(jù)。ADC2通道的數(shù)據(jù)貌似在ADC1_DR中的高16位中無(wú)法看到。

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//初始化DMA_ADC

void ADCWithDMAInit(void)

{

//DMA init;??Using DMA channel 1

DMA_InitTypeDef DMA_InitStructure;

/* 允許 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;// 全字節(jié)

DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;? ? ? ???// 全字節(jié)

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傳輸完成中斷

DMA_Cmd(DMA1_Channel1, ENABLE); //正式允許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 中斷設(shè)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時(shí)鐘

RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2,ENABLE); //timer2時(shí)鐘

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 更新中斷。即溢出中斷

//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時(shí)鐘PLCK2的6分頻 12M。ADC最大時(shí)鐘不能超過(guò)14M!

RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1|RCC_APB2Periph_ADC2, ENABLE);

//A口有1個(gè)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工作在獨(dú)立模式 同步規(guī)則模式

ADC_InitStructure.ADC_ScanConvMode =DISABLE;? ?? ?? ?? ? //使能模數(shù)轉(zhuǎn)換工作在掃描模式(多通道)

ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;? ?? ? //模數(shù)轉(zhuǎn)換工作在正常模式

ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;? ? //軟啟動(dòng)觸發(fā)啟動(dòng)

ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;? ?//ADC數(shù)據(jù)右對(duì)齊

ADC_InitStructure.ADC_NbrOfChannel = 1;? ?? ?? ?? ?? ?? ?//順序進(jìn)行規(guī)則轉(zhuǎn)換的ADC通道的數(shù)目

ADC_Init(ADC1, &ADC_InitStructure);? ?? ?? ?? ?? ?? ?? ? //根據(jù)ADC_InitStructure中指定的參數(shù)初始化外設(shè)ADC1的寄存?

//ADC_Init(ADC2, &ADC_InitStructure);

/* Enable ADC1 EOC interrupt */

//ADC_ITConfig(ADC1, ADC_IT_EOC, ENABLE);

//設(shè)置指定ADC的規(guī)則組通道，設(shè)置它們的轉(zhuǎn)化順序和采樣時(shí)間(取最大值)//增加通道到規(guī)則隊(duì)列中

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

//C口有1個(gè)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工作在獨(dú)立模式 同步規(guī)則模式

ADC_InitStructure.ADC_ScanConvMode =DISABLE;? ?? ?? ?? ? //使能模數(shù)轉(zhuǎn)換工作在掃描模式(多通道)

ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;? ?? ? //模數(shù)轉(zhuǎn)換工作在正常模式

ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;? ? //軟啟動(dòng)觸發(fā)啟動(dòng)

ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;? ?//ADC數(shù)據(jù)右對(duì)齊

ADC_InitStructure.ADC_NbrOfChannel = 1;? ?? ?? ?? ?? ?? ?//順序進(jìn)行規(guī)則轉(zhuǎn)換的ADC通道的數(shù)目

\

ADC_Init(ADC2, &ADC_InitStructure);? ?? ?? ?? ?? ?? ?? ? //根據(jù)ADC_InitStructure中指定的參數(shù)初始化外設(shè)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()

}

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