STM32 ADC（一个外部，一个内部温度）

tyboy

之前第二组读不出值来。。现在好了，贴不删了。。代码可用。和我一样的菜鸟把第二通运算出温度就可以了。。

1. #include "adcdma.h"
   
2. // __IO uint16_t ADCDATA;
   
3. //__IO uint16_t ADCDATA[10][2];
   
4. __IO u16 ADCDATA[2];
   
5. __IO float ADCDONE[2];
   
6. void GPIO_Conf()
   
7. {
   
8.   GPIO_InitTypeDef GPIO_Conf;
   
9.   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO  | RCC_APB2Periph_ADC1,ENABLE);
   
10.   GPIO_Conf.GPIO_Pin =  GPIO_Pin_1;
    
11.   GPIO_Conf.GPIO_Mode =  GPIO_Mode_AIN;
    
12.   GPIO_Init(GPIOC,&GPIO_Conf);
    
13.   GPIO_Conf.GPIO_Pin = GPIO_Pin_9;
    
14.   GPIO_Conf.GPIO_Mode = GPIO_Mode_AF_PP;
    
15.   GPIO_Conf.GPIO_Speed = GPIO_Speed_50MHz;
    
16.   GPIO_Init(GPIOA,&GPIO_Conf);
    
17. 
    
18. }
    
19. 
    
20. void DMA_Conf()
    
21. {
    
22.   DMA_InitTypeDef DMA_Conf;
    
23.   RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1,ENABLE);
    
24.   DMA_DeInit(DMA1_Channel1);
    
25.   DMA_Conf.DMA_PeripheralBaseAddr = (u32)&ADC1->DR;
    
26.   DMA_Conf.DMA_MemoryBaseAddr = (u32)ADCDATA;
    
27.   DMA_Conf.DMA_DIR = DMA_DIR_PeripheralSRC;
    
28.   DMA_Conf.DMA_BufferSize =2;
    
29.   DMA_Conf.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
    
30.   DMA_Conf.DMA_MemoryInc = DMA_MemoryInc_Enable;
    
31.   DMA_Conf.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
    
32.   DMA_Conf.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
    
33.   DMA_Conf.DMA_Mode = DMA_Mode_Circular;
    
34.   DMA_Conf.DMA_Priority = DMA_Priority_High;
    
35.   DMA_Conf.DMA_M2M = DMA_M2M_Disable;
    
36.   DMA_Init(DMA1_Channel1,&DMA_Conf);
    
37.   DMA_Cmd(DMA1_Channel1,ENABLE);
    
38. }
    
39. 
    
40. void USART_Conf()
    
41. {
    
42.   USART_InitTypeDef USART_Conf;
    
43.   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    
44.   USART_Conf.USART_BaudRate = 9600;
    
45.   USART_Conf.USART_WordLength = USART_WordLength_8b;
    
46.   USART_Conf.USART_StopBits = USART_StopBits_1;
    
47.   USART_Conf.USART_Parity = USART_Parity_No;
    
48.   USART_Conf.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    
49.   USART_Conf.USART_Mode = USART_Mode_Tx;
    
50.   USART_Init(USART1,&USART_Conf);
    
51.   
    
52.   USART_Cmd(USART1,ENABLE);
    
53.   
    
54. }
    
55. 
    
56. void ADC_Conf()
    
57. {
    
58.   ADC_InitTypeDef ADC_Conf;
    
59.   
    
60.   ADC_Conf.ADC_Mode = ADC_Mode_Independent;
    
61.   ADC_Conf.ADC_ScanConvMode = ENABLE;
    
62.   ADC_Conf.ADC_ContinuousConvMode = ENABLE;
    
63.   ADC_Conf.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;
    
64.   ADC_Conf.ADC_DataAlign = ADC_DataAlign_Right ;
    
65.   ADC_Conf.ADC_NbrOfChannel = 2;
    
66.   ADC_Init(ADC1,&ADC_Conf);
    
67.   
    
68.   
    
69.   
    
70.   RCC_ADCCLKConfig(RCC_PCLK2_DiARM);  
    
71.   ADC_RegularChannelConfig(ADC1,ADC_Channel_11,1,ADC_SampleTime_55Cycles5 );
    
72.   ADC_RegularChannelConfig(ADC1,ADC_Channel_16,2,ADC_SampleTime_55Cycles5 );
    
73.   
    
74.   ADC_DMACmd(ADC1,ENABLE);
    
75.   ADC_TempSensorVrefintCmd(ENABLE);
    
76.   ADC_Cmd(ADC1,ENABLE);
    
77.   
    
78.   ADC_ResetCalibration(ADC1);
    
79.   while(ADC_GetResetCalibrationStatus(ADC1));
    
80.   ADC_StartCalibration(ADC1);
    
81.   while(ADC_GetCalibrationStatus(ADC1));
    
82.   ADC_SoftwareStartConvCmd(ADC1,ENABLE);
    
83.   while(ADC_GetSoftwareStartConvStatus(ADC1));
    
84.   
    
85.   
    
86. }
    
87. 
    
88. float getvol(u16 advol)
    
89. {
    
90.   return (float)advol/4096*3.3;
    
91. }
    
92. 
    
93. void datacomp()
    
94. {
    
95.   u8 i;
    
96.   for(i=0; i<2; i++)
    
97.   {
    
98. 
    
99.     ADCDONE[i] = getvol(ADCDATA[i]);
    
100. 
     
101.   }
     
102. }
     
103. 
     
104. void CALL_SET()
     
105. {
     
106.   GPIO_Conf();
     
107.   DMA_Conf();
     
108.   USART_Conf();
     
109.   ADC_Conf();
     
110. }

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