DMA,采集adc，多通道，数码管闪烁厉害，关了dma就正常了？

zhangrufan · 发表于 2016-1-15 15:38:34

int main(void)
{
u16 i,t;

delay_init();            //延时函数初始化
NVIC_Configuration();    //设置NVIC中断分组2:2位抢占优先级，2位响应优先级
LED_Init();
LCD_Init();       //LED端口初始化
IIC_Init();
//TIM3_Int_Init(1249,35);//1Mhz的计数频率，计数到5000为500ms    Tout= ((arr+1)*(psc+1))/72=?us
//TIM3_Int_Init(224,199);//1Mhz的计数频率，计数到2499为250ms    Tout= ((arr+1)*(psc+1))/72=?us
TIM4_Int_Init(249,719);//1Mhz的计数频率，计数到5000为500ms    Tout= ((arr+1)*(psc+1))/72=?us
GPIO_Configuration();
// USART1_Configuration();
Adcbydma_Init( )    ;
USART2_Configuration();
delay_ms(1000);
LED1=0;
LED2=0;
LED3=0;
LED4=0;

/**********测试程序******************************************/
A_data=AT24CXX_ReadLenByte(10,1);
A_data++;
AT24CXX_WriteOneByte(10,A_data); //指定地址写入一个字节
/********************************************************/

Data_Reset();

   while(1)
{

delay_ms(2);

/******测试程序*****111111111111***********/
if(++test>100)
   { F_data++;test=0;
if(F_data>1000)F_data=0;
   }

   display_switch();    //显示程序 U A P L F 2015.1.5
      KEY_Scan() ; //键盘扫描 2015.1.6
if(times>150)
      {
L_data=    (long) ( cc*0.128+2.67 );
     U_data=(long)(    aa-87-70);
A_data=    (long)    (bb*0.077+2.0);
times=0;
}
if(USART_RX_STA ==1 )

}
}
void Adcbydma_Init(void)
{
   GPIO_InitTypeDef GPIO_InitStructure;
   ADC_InitTypeDef ADC_InitStructure;
   DMA_InitTypeDef DMA_InitStructure;
   NVIC_InitTypeDef NVIC_InitStructure;
   TIM_TimeBaseInitTypeDef TIM_TimeBaseStructure;

   /* Configure one bit for preemption priority */
   #if defined (VECT_TAB_RAM)
   /* Set the Vector Table base location at 0x20000000 */
   NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
   #elif defined(VECT_TAB_FLASH_IAP)
   NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x2000);
   #else  /* VECT_TAB_FLASH  */
   /* Set the Vector Table base location at 0x08000000 */
   NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
   #endif

   /* Configure the NVIC Preemption Priority Bits */
   NVIC_PriorityGroupConfig(NVIC_PriorityGroup_3);

   /* Enable the RTC Interrupt */
   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);

   RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM3,ENABLE);

/* Time Base configuration */
   TIM_TimeBaseStructInit(&TIM_TimeBaseStructure);

TIM_TimeBaseStructure.TIM_Prescaler = 1;
TIM_TimeBaseStructure.TIM_Period = 22499;

TIM_TimeBaseStructure.TIM_ClockDivision = 0x0;
TIM_TimeBaseStructure.TIM_CounterMode = TIM_CounterMode_Up;
TIM_TimeBaseInit(TIM3, &TIM_TimeBaseStructure);

TIM_SelectOutputTrigger(TIM3,TIM_TRGOSource_Update);
TIM_Cmd(TIM3,ENABLE);
TIM_ITConfig(TIM3,TIM_IT_Update,ENABLE);

   /* Enable ADC1 and GPIOA clock */
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOC, ENABLE);
   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);

   /* Configure PA.01 (ADC Channel1) as analog input -------------------------*/
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
   GPIO_Init(GPIOC, &GPIO_InitStructure);

   /* DMA channel1 configuration ----------------------------------------------*/
   DMA_DeInit(DMA1_Channel1);
   DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;
   DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADCConvertedValue;
   DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
   DMA_InitStructure.DMA_BufferSize = 32*3+3;
   DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
   DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
   DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
   DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
   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);

   DMA_ITConfig(DMA1_Channel1,DMA_IT_TC,ENABLE); //开传输完中断

   /* Enable DMA channel1 */
   DMA_Cmd(DMA1_Channel1, ENABLE);

   RCC_ADCCLKConfig(RCC_PCLK2_Div6);
      /* ADC1 configuration ------------------------------------------------------*/
   ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
   ADC_InitStructure.ADC_ScanConvMode = ENABLE;
   ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
   ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T3_TRGO ;//ADC_ExternalTrigConv_None;
   ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
   ADC_InitStructure.ADC_NbrOfChannel = 3;
   ADC_Init(ADC1, &ADC_InitStructure);
   /* ADC1 regular channels configuration */
   ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 1, ADC_SampleTime_41Cycles5);
   ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 2, ADC_SampleTime_41Cycles5);
   ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 3, ADC_SampleTime_41Cycles5);
   /* Enable ADC1 DMA */
   ADC_DMACmd(ADC1, ENABLE);

   /* Enable ADC1 */
   ADC_Cmd(ADC1, ENABLE);
   /* Enable Vrefint channel17 */
   //ADC_TempSensorVrefintCmd(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));
      /* Start ADC1 Software Conversion */

/* Enable ADC1 EOC  interrupts */

// ADC_ITConfig(ADC1, ADC_IT_EOC ,ENABLE);

   ADC_SoftwareStartConvCmd(ADC1, ENABLE);

   /* Test on DMA1 channel1 transfer complete flag */

}

一个主程序，一个初始化dma中断，