STM32用DMA实现多路ADC通道数据采集

 1 //PC0 FOR ANAGLE SAMPLE
 2 static void Protect_ClkInit(void)
 3 {
 4     RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1RCC_APB2Periph_GPIOC,ENABLE);
 5     RCC_ADCCLKConfig(RCC_PCLK2_Div6);
 6     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
 7 }
 8 
 9 static void Protect_GPIOInit(void)
10 {
11     GPIO_InitTypeDef GPIO_InitStructure;
12 
13     /*GPIO PhaseA_H 初始化*/
14     GPIO_InitStructure.GPIO_Pin = ADC_PIN;
15     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;
16     GPIO_Init(TIMER_GPIO_AH_PORT, &GPIO_InitStructure);
17 }
18 
19 static void Protect_AdcInit(void)
20 {
21     ADC_InitTypeDef ADC_InitStructure;
22     
23     ADC_InitStructure.ADC_Mode = ADC_Mode_Independent;
24     ADC_InitStructure.ADC_ScanConvMode = ENABLE;
25     ADC_InitStructure.ADC_ContinuousConvMode = DISABLE;
26     ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
27     ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;
28     ADC_InitStructure.ADC_NbrOfChannel = 3;
29     ADC_Init(ADC1, &ADC_InitStructure);
30     
31     ADC_TempSensorVrefintCmd(ENABLE);
32     ADC_RegularChannelConfig(ADC1,ADC_Channel_10,1,ADC_SampleTime_7Cycles5);
33     ADC_RegularChannelConfig(ADC1,ADC_Channel_TempSensor,2,ADC_SampleTime_7Cycles5);
34     ADC_RegularChannelConfig(ADC1,ADC_Channel_Vrefint,3,ADC_SampleTime_7Cycles5);
35     
36     ADC_DMACmd(ADC1, ENABLE);
37     /* Enable ADC1 external trigger */
38     ADC_ExternalTrigConvCmd(ADC1, DISABLE);
39 
40     ADC_Cmd(ADC1, ENABLE);
41 
42     ADC_ResetCalibration(ADC1);
43 
44     while(ADC_GetResetCalibrationStatus(ADC1));
45 
46     ADC_StartCalibration(ADC1);
47 
48     while(ADC_GetCalibrationStatus(ADC1));
49 
50 }
51 
52 static void Protect_DMAInit(void)
53 {
54 
55     DMA_InitTypeDef DMA_InitStructure;
56 
57     /* DMA1 channel1 configuration -*/
58     DMA_DeInit(DMA1_Channel1);
59     DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t) & (ADC1->DR);
60     DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADCConvertedValue;
61     DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
62     DMA_InitStructure.DMA_BufferSize = 3;
63     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
64     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
65     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
66     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
67     DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
68     DMA_InitStructure.DMA_Priority = DMA_Priority_High;
69     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
70     DMA_Init(DMA1_Channel1, &DMA_InitStructure);
71 
72     /* Enable DMA1 channel1 */
73     DMA_Cmd(DMA1_Channel1, ENABLE);
74 }

1     ADC_RegularChannelConfig(ADC1,ADC_Channel_10,1,ADC_SampleTime_239Cycles5);
2     ADC_RegularChannelConfig(ADC1,ADC_Channel_TempSensor,2,ADC_SampleTime_239Cycles5);
3     ADC_RegularChannelConfig(ADC1,ADC_Channel_Vrefint,3,ADC_SampleTime_239Cycles5);