STM32F4库函数初始化系列：三重ADC——DMA

 1 void _DMA_Configuration(void)
 2 {
 3   DMA_InitTypeDef DMA_InitStructure;
 4
 5   /* DMA2 Stream0 channel0 configuration */
 6   DMA_InitStructure.DMA_Channel = DMA_Channel_0;
 7   DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)&(ADC->CDR);
 8   DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)_AD_Value;
 9   DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
10   DMA_InitStructure.DMA_BufferSize = 24;
11   DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
12   DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
13   DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
14   DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
15   DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
16   DMA_InitStructure.DMA_Priority = DMA_Priority_High;
17   DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
18   DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
19   DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
20   DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
21   DMA_Init(DMA2_Stream0, &DMA_InitStructure);
22
23   /* DMA2_Stream0 enable */
24   DMA_Cmd(DMA2_Stream0, ENABLE);
25 ｝
26 void _ADC_Configuration(void)
27 {
28   ADC_InitTypeDef       ADC_InitStructure;
29   ADC_CommonInitTypeDef ADC_CommonInitStructure;
30
31   /* ADC Common configuration *************************************************/
32   ADC_CommonInitStructure.ADC_Mode = ADC_TripleMode_RegSimult;
33   ADC_CommonInitStructure.ADC_TwoSamplingDelay = ADC_TwoSamplingDelay_5Cycles;
34   ADC_CommonInitStructure.ADC_DMAAccessMode = ADC_DMAAccessMode_1;
35   ADC_CommonInitStructure.ADC_Prescaler = ADC_Prescaler_Div2;
36   ADC_CommonInit(&ADC_CommonInitStructure);
37
38   /* ADC1 regular channel 12 configuration ************************************/
39   ADC_InitStructure.ADC_Resolution = ADC_Resolution_10b;
40   ADC_InitStructure.ADC_ScanConvMode = ENABLE;
41   ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;
42   ADC_InitStructure.ADC_ExternalTrigConvEdge = ADC_ExternalTrigConvEdge_None;
43   ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
44   ADC_InitStructure.ADC_NbrOfConversion = 8;
45   ADC_Init(ADC1, &ADC_InitStructure);
46
47   ADC_RegularChannelConfig(ADC1, ADC_Channel_0 , 1, ADC_SampleTime_480Cycles);
48   ADC_RegularChannelConfig(ADC1, ADC_Channel_1 , 2, ADC_SampleTime_480Cycles);
49   ADC_RegularChannelConfig(ADC1, ADC_Channel_2 , 3, ADC_SampleTime_480Cycles);
50   ADC_RegularChannelConfig(ADC1, ADC_Channel_3 , 4, ADC_SampleTime_480Cycles);
51   ADC_RegularChannelConfig(ADC1, ADC_Channel_4 , 5, ADC_SampleTime_480Cycles);
52   ADC_RegularChannelConfig(ADC1, ADC_Channel_5 , 6, ADC_SampleTime_480Cycles);
53   ADC_RegularChannelConfig(ADC1, ADC_Channel_6 , 7, ADC_SampleTime_480Cycles);
54   ADC_RegularChannelConfig(ADC1, ADC_Channel_7 , 8, ADC_SampleTime_480Cycles);
55   /* Enable ADC1 DMA */
56   ADC_DMACmd(ADC1, ENABLE);
57
58   /* ADC2 regular channel 12 configuration ************************************/
59   ADC_Init(ADC2, &ADC_InitStructure);
60   /* ADC2 regular channel12 configuration */
61   ADC_RegularChannelConfig(ADC2, ADC_Channel_8 , 1, ADC_SampleTime_480Cycles);
62   ADC_RegularChannelConfig(ADC2, ADC_Channel_9 , 2, ADC_SampleTime_480Cycles);
63   ADC_RegularChannelConfig(ADC2, ADC_Channel_10, 3, ADC_SampleTime_480Cycles);
64   ADC_RegularChannelConfig(ADC2, ADC_Channel_11, 4, ADC_SampleTime_480Cycles);
65   ADC_RegularChannelConfig(ADC2, ADC_Channel_12, 5, ADC_SampleTime_480Cycles);
66   ADC_RegularChannelConfig(ADC2, ADC_Channel_13, 6, ADC_SampleTime_480Cycles);
67   ADC_RegularChannelConfig(ADC2, ADC_Channel_14, 7, ADC_SampleTime_480Cycles);
68   ADC_RegularChannelConfig(ADC2, ADC_Channel_15, 8, ADC_SampleTime_480Cycles);
69
70   /* ADC3 regular channel 12 configuration ************************************/
71   ADC_Init(ADC3, &ADC_InitStructure);
72   /* ADC3 regular channel12 configuration */
73   ADC_RegularChannelConfig(ADC3, ADC_Channel_4 , 1, ADC_SampleTime_480Cycles);
74   ADC_RegularChannelConfig(ADC3, ADC_Channel_5 , 2, ADC_SampleTime_480Cycles);
75   ADC_RegularChannelConfig(ADC3, ADC_Channel_6 , 3, ADC_SampleTime_480Cycles);
76   ADC_RegularChannelConfig(ADC3, ADC_Channel_7 , 4, ADC_SampleTime_480Cycles);
77   ADC_RegularChannelConfig(ADC3, ADC_Channel_8 , 5, ADC_SampleTime_480Cycles);
78   ADC_RegularChannelConfig(ADC3, ADC_Channel_9 , 6, ADC_SampleTime_480Cycles);
79   ADC_RegularChannelConfig(ADC3, ADC_Channel_14, 7, ADC_SampleTime_480Cycles);
80   ADC_RegularChannelConfig(ADC3, ADC_Channel_15, 8, ADC_SampleTime_480Cycles);
81
82   /* Enable DMA request after last transfer (multi-ADC mode) ******************/
83   ADC_MultiModeDMARequestAfterLastTransferCmd(ENABLE);
84
85   /* Enable ADC1 **************************************************************/
86   ADC_Cmd(ADC1, ENABLE);
87
88   /* Enable ADC2 **************************************************************/
89   ADC_Cmd(ADC2, ENABLE);
90
91   /* Enable ADC3 **************************************************************/
92   ADC_Cmd(ADC3, ENABLE);
93
94   /* Start ADC1 Software Conversion */
95   ADC_SoftwareStartConv(ADC1);
96
97 }