l30439129 发表于 2015-1-22 13:56:14

F407 ADC及DMA应用数据溢出求指点~

void ADC_DMA_Config(void)
{
        NVIC_InitTypeDef NVIC_InitStructure;
        //DMA for ADCÅäÖýṹ
        DMA_InitTypeDef DMA_InitStructure;   

        RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2, ENABLE);

        DMA_DeInit(DMA2_Stream0);
        /* DMA2 Stream0 channe0 configuration **************************************/
        DMA_InitStructure.DMA_Channel = ADC_DMAn;
        DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)0x40012308;
        DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&DMABuf;
        DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
        DMA_InitStructure.DMA_BufferSize = ADC_REG_SEQ_SIZE;
        DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
        DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
        DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
        DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
        DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
        //        DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
        DMA_InitStructure.DMA_Priority = DMA_Priority_High;
        DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
        DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
        DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
        DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
        DMA_Init(DMA2_Stream0, &DMA_InitStructure);

        /* Enable the DMA gloabal Interrupt */
        DMA_ClearITPendingBit(DMA2_Stream0,DMA_IT_TC);
    DMA_ITConfig(DMA2_Stream0, DMA_IT_TC, ENABLE);
    //Enable DMA ADC_DMAn
    DMA_Cmd(DMA2_Stream0, ENABLE);
    //DMA for ADC ÖжÏʹÄÜ
       
        NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream0_IRQn;
        NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
        NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
        NVIC_Init(&NVIC_InitStructure);
}
void ADC_Config(void)
{
        ADC_InitTypeDef   ADC_InitStructure;
        ADC_CommonInitTypeDef ADC_CommonInitStructure;

        /* Enable ADC clock */
        RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_ADC2, ENABLE);

        /* ADC2 regular channel 12 configuration ************************************/
        ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
        ADC_InitStructure.ADC_ScanConvMode = ENABLE;
        ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
        ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
        ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC4;
        ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
        ADC_InitStructure.ADC_NbrOfConversion = ADC_REG_SEQ_SIZE;
        ADC_Init(ADC2, &ADC_InitStructure);
        /* ADC1 regular channel 12 configuration ************************************/
        ADC_InitStructure.ADC_Resolution = ADC_Resolution_12b;
        ADC_InitStructure.ADC_ScanConvMode = ENABLE;
        ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;        //ENABLE
        ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_Rising;
        ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC4;
        ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
        ADC_InitStructure.ADC_NbrOfConversion = ADC_REG_SEQ_SIZE;
        ADC_Init(ADC1, &ADC_InitStructure);

        /* ADC Common configuration *************************************************/
        ADC_CommonInitStructure.ADC_Mode = ADC_DualMode_RegSimult;        //Ë«ÖØģʽ¡¢¹æÔò×é
        ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
        ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_2;
        ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div4;
        ADC_CommonInit(&ADC_CommonInitStructure);

    //¸üÐÂɨÃèÐòÁÐ×é
    ReNewADC_RegularSeqConfig();
    //ʹÄÜζȴ«¸ÐÆ÷ºÍÄÚ²¿²Î¿¼µçѹͨµÀ
    ADC_TempSensorVrefintCmd(ENABLE);

    //Enable ADC1 DMA
    ADC_DMACmd(ADC1, ENABLE);
       
        //Enable ADC1 ADC2
    ADC_Cmd(ADC1, ENABLE);
    ADC_Cmd(ADC2, ENABLE);                                                         //Ë«ADC
}
void TIM2_Config(void)
{
    TIM_TimeBaseInitTypeDef        TIM_TimeBaseStructure;
        TIM_OCInitTypeDef                        TIM_OCInitStructure;

        RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM2, ENABLE);
        TIM_DeInit(TIM2);//¸´Î»TIM2¶¨Ê±Æ÷

        //X us¶¨Ê±ÖжÏ
        TIM_TimeBaseStructure.TIM_Period = SamplePeriod; //×î´ó¼ÆÊýÖµ0xffff       
        TIM_TimeBaseStructure.TIM_Prescaler = 71;//·ÖƵ1us   
        TIM_TimeBaseStructure.TIM_ClockDivision = 0x00;//·ÖƵÒò×Ó//CK_CNT = FCLK /(TIM_Prescaler+1)
        TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
        TIM_TimeBaseInit(TIM2, &TIM_TimeBaseStructure);

        //PWM1 Mode configuration: Channel4
    TIM_OCInitStructure.TIM_OCMode          = TIM_OCMode_PWM1;
    TIM_OCInitStructure.TIM_OutputState   = TIM_OutputState_Enable;               
    TIM_OCInitStructure.TIM_Pulse         = (SamplePeriod>>1);//(Õ¼¿Õ)
    TIM_OCInitStructure.TIM_OCPolarity      = TIM_OCPolarity_High;
        TIM_OC4Init(TIM2, &TIM_OCInitStructure);
        TIM_OC4PreloadConfig(TIM2, TIM_OCPreload_Disable);//¹Ø±ÕԤװÔØ
        TIM_ARRPreloadConfig(TIM2, ENABLE);        //ʹÄÜ×Ô¶¯ÖØ×°
}
void ADC_DMA_TIM2Config(void)
{
    GPIO_InitTypeDef GPIO_InitStructure;
   
        /* Enable GPIOA clock */
        RCC_APB2PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
        RCC_APB2PeriphClockCmd(RCC_AHB1Periph_GPIOC, ENABLE);

    /* Configure PA.0-7 pin (ADC Channel0 ~ Channel7) as analog input */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3        |
                                                                  GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
                                                                  
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
    GPIO_Init(GPIOA, &GPIO_InitStructure);   

    /* Configure PC.0-3 pin (ADC Channel10 ~ Channel2) as analog input */
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1 | GPIO_Pin_2 | GPIO_Pin_3;
    GPIO_Init(GPIOC, &GPIO_InitStructure);   

        ADC_DMA_Config();
    ADC_Config();
        TIM2_Config();

        /* Enable DMA request after last transfer (multi-ADC mode) ******************/
        ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);
        /* TIM2 main Output Enable */
        TIM_CtrlPWMOutputs(TIM2,ENABLE);       
        //ÍⲿʱÖÓ´¥·¢ADC
        TIM_Cmd(TIM2, ENABLE);
}
void DMA2_Stream0_IRQHandler(void)
{
        INT8U err;
        u8 temp;

    if(DMA_GetITStatus(DMA2_Stream0,DMA_IT_TCIF0))
    {
                if(SampleCounter < HITS) //Öܲ¨²ÉÑùÍê³É
      {
                temp = DMABufFlag; //±£´æÍê³ÉͨµÀµÄ±êÖ¾
                                                                                        
                DMABufFlag ^= 0x01;   //ÂÖתͨµÀ
                DMA2_Stream0->M0AR = (u32)&DMABuf;//еĽÓÊÕ»º´æÇø
                        //...
                        SampleCounter++;
                        if(SampleCounter >= HITS) //Öܲ¨²ÉÑùÍê³É
                {
                                SampleCounter = 0;
                                //...
                        }

                } //if(SampleCounter < HITS)
                else
                        SampleCounter = 0;
            DMA_ClearITPendingBit(DMA2_Stream0,DMA_IT_TCIF0);
    }//end if(DMA_GetITStatus(DMA1_IT_TC1))
}
程序预想的流程是：采用ADC1、ADC2规则组对多个通道进行数据采样，用DMA保存采样数据，规则组中所有通道采样完成后备份数据后续处理。
调用ADC_DMA_TIM2Config函数初始化后，程序运行仿真，只能进入一次中断服务程序DMA2_Stream0_IRQHandler，SR寄存器的OVR位被置位，查不出是什么原因。求指点。。。。。。。。。

l30439129 发表于 2015-1-22 15:28:20

没人啊？
最新进展，溢出是由DMA2_Stream0->M0AR = (u32)&DMABuf;引起的，好像不能这样操作，DMA改为双缓存模式后，不会溢出，能连续进入DMA2中断服务程序了，DMA初始化函数增加如下代码：
        DMA_DoubleBufferModeConfig(DMA2_Stream0, (uint32_t)DMABuf32,DMA_Memory_0);
        DMA_DoubleBufferModeCmd(DMA2_Stream0, ENABLE);

但是缓冲区接收不到采样数据。缓存区指示标志CT也不会变化。

l30439129 发表于 2015-1-23 14:12:27

没事了，可以正常用了，是我自己不熟悉407的库，很多地方应用很103的搞混了 :L:loveliness:

wf2285633228 发表于 2015-10-16 01:36:41

最近也在做，楼主做的很好，已经做出来了吗？求发一份程序学习学习。

wf2285633228 发表于 2015-10-16 01:37:11

2285633228@qq.com，多谢！
页: [1]
查看完整版本: F407 ADC及DMA应用数据溢出求指点~