2020年01月21日 | stm32f103zet6使用adc3通过dma2_5转换

#define ADC3_DR_Address    ((u32)0x40013C4C) 

 ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;//ADC1和ADC2工作在独立模式

 ADC_InitStructure.ADC_ScanConvMode = ENABLE; //使能扫描

 ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;//ADC转换工作在单次模式

 ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_T2_CC3;//定时器2的捕获比较3为转换外部触发

 ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;//转换数据右对齐

 ADC_InitStructure.ADC_NbrOfChannel = 10;//转换通道为通道1

 ADC_Init(ADC3, &ADC_InitStructure); //初始化ADC

 ADC_RegularChannelConfig(ADC3, ADC_Channel_1, 1,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_12, 2,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_8, 3,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_7, 4,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_11, 5,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_10, 6,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_13, 7,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_5, 8,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_6, 9,  ADC_SampleTime_28Cycles5 );

 ADC_RegularChannelConfig(ADC3, ADC_Channel_4, 10,  ADC_SampleTime_28Cycles5 );

 ADC_DMACmd(ADC3, ENABLE);//使能ADC3模块DMA

 ADC_Cmd(ADC3, ENABLE);//使能ADC1

 ADC_ResetCalibration(ADC3); //重置ADC1校准寄存器

  while(ADC_GetResetCalibrationStatus(ADC3));//等待ADC1校准重置完成

 ADC_StartCalibration(ADC3);//开始ADC1校准

 while(ADC_GetCalibrationStatus(ADC3));//等待ADC1校准完成

 ADC_ExternalTrigConvCmd(ADC3, ENABLE); ////设置外部事件为TIM2_CC2

 DMA_DeInit(DMA2_Channel5);//复位DMA通道5

 DMA_InitStructure.DMA_PeripheralBaseAddr = ADC3_DR_Address;

 DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&ADC3ConvertedValue;

 DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

 DMA_InitStructure.DMA_BufferSize = 10;

 DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

 DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//当前存储器地址不变

 DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;//定义外设数据宽度16位

 DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //定义存储器数据宽度16位

 DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;//DMA通道操作模式位环形缓冲模式

 DMA_InitStructure.DMA_Priority = DMA_Priority_High;//DMA通道优先级高

 DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;//禁止DMA通道存储器到存储器传输

 DMA_Init(DMA2_Channel5, &DMA_InitStructure);

  DMA_Cmd(DMA2_Channel5, ENABLE); //使能DMA通道5

 DMA_ITConfig(DMA2_Channel5, DMA_IT_TC, ENABLE);

void DMA2_Channel4_5_IRQHandler(void)

{

   DMA_ClearFlag(DMA2_FLAG_GL5 );

}

void Interrupts_Config(void)

{

 NVIC_InitTypeDef NVIC_InitStructure; 

 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

 NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);

 NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel4_5_IRQn;

 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;

 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

 NVIC_Init(&NVIC_InitStructure);

}