標(biāo)題: STM32多通道adc采集代碼 [打印本頁(yè)]
作者: ht95    時(shí)間: 2017-5-19 03:49
標(biāo)題: STM32多通道adc采集代碼
STM32 ADC多通道轉(zhuǎn)換
描述：用ADC連續(xù)采集11路模擬信號(hào)，并由DMA傳輸?shù)絻?nèi)存。ADC配置為掃描并且連續(xù)轉(zhuǎn)換模式，ADC的時(shí)鐘配置為12MHZ。在每次轉(zhuǎn)換結(jié)束后，由DMA循環(huán)將轉(zhuǎn)換的數(shù)據(jù)傳輸?shù)絻?nèi)存中。ADC可以連續(xù)采集N次求平均值。最后通過(guò)串口傳輸出最后轉(zhuǎn)換的結(jié)果。
程序如下：


  1. ＃i nclude "stm32f10x.h" //這個(gè)頭文件包括STM32F10x所有外圍寄存器、位、內(nèi)存映射的定義
  2. ＃i nclude "eval.h" //頭文件（包括串口、按鍵、LED的函數(shù)聲明）
  3. ＃i nclude "SysTickDelay.h"
  4. ＃i nclude "UART_INTERFACE.h"
  5. ＃i nclude <stdio.h>
  6. #define N 50 //每通道采50次
  7. #define M 12 //為12個(gè)通道
  8. vu16 AD_Value[N][M]; //用來(lái)存放ADC轉(zhuǎn)換結(jié)果，也是DMA的目標(biāo)地址
  9. vu16 After_filter[M]; //用來(lái)存放求平均值之后的結(jié)果
  10. int i;

  12. void GPIO_Configuration(void)
  13. {
  14. GPIO_InitTypeDef GPIO_InitStructure;
  15. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  16. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //因?yàn)閁SART1管腳是以復(fù)用的形式接到GPIO口上的，所以使用復(fù)用推挽式輸出
  17. GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  18. GPIO_Init(GPIOA, &GPIO_InitStructure);

  20. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  21. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  22. GPIO_Init(GPIOA, &GPIO_InitStructure);

  24. //PA0/1/2 作為模擬通道輸入引腳
  25. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0| GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3;
  26. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模擬輸入引腳
  27. GPIO_Init(GPIOA, &GPIO_InitStructure);
  28. //PB0/1 作為模擬通道輸入引腳
  29. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1;
  30. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模擬輸入引腳
  31. GPIO_Init(GPIOB, &GPIO_InitStructure);
  32. //PC0/1/2/3/4/5 作為模擬通道輸入引腳
  33. GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0|GPIO_Pin_1|GPIO_Pin_2|GPIO_Pin_3|GPIO_Pin_4|GPIO_Pin_5;
  34. GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN; //模擬輸入引腳
  35. GPIO_Init(GPIOC, &GPIO_InitStructure);
  36. }
  37. }

  39. void RCC_Configuration(void)
  40. {
  41. ErrorStatus HSEStartUpStatus;
  42. RCC_DeInit(); //RCC 系統(tǒng)復(fù)位
  43. RCC_HSEConfig(RCC_HSE_ON); //開(kāi)啟HSE
  44. HSEStartUpStatus = RCC_WaitForHSEStartUp(); //等待HSE準(zhǔn)備好
  45. if(HSEStartUpStatus == SUCCESS)
  46. {
  47. FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable); //Enable Prefetch Buffer
  48. FLASH_SetLatency(FLASH_Latency_2); //Set 2 Latency cycles
  49. RCC_HCLKConfig(RCC_SYSCLK_Div1); //AHB clock = SYSCLK
  50. RCC_PCLK2Config(RCC_HCLK_Div1); //APB2 clock = HCLK
  51. RCC_PCLK1Config(RCC_HCLK_Div2); //APB1 clock = HCLK/2
  52. RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_6); //PLLCLK = 12MHz * 6 = 72 MHz
  53. RCC_PLLCmd(ENABLE); //Enable PLL
  54. while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET); //Wait till PLL is ready
  55. RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK); //Select PLL as system clock source
  56. while(RCC_GetSYSCLKSource() != 0x08); //Wait till PLL is used as system clock source
  57. RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB
  58. | RCC_APB2Periph_GPIOC |RCC_APB2Periph_ADC1 | RCC_APB2Periph_AFIO |RCC_APB2Periph_USART1, ENABLE ); //使能ADC1通道時(shí)鐘，各個(gè)管腳時(shí)鐘
  59. RCC_ADCCLKConfig(RCC_PCLK2_Div6); //72M/6=12,ADC最大時(shí)間不能超過(guò)14M
  60. RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); //使能DMA傳輸
  61. }
  62. }

  64. void ADC1_Configuration(void)
  65. {
  66. ADC_InitTypeDef ADC_InitStructure;
  67. ADC_DeInit(ADC1); //將外設(shè) ADC1 的全部寄存器重設(shè)為缺省值

  69. ADC_InitStructure.ADC_Mode = ADC_Mode_Independent; //ADC工作模式:ADC1和ADC2工作在獨(dú)立模式
  70. ADC_InitStructure.ADC_ScanConvMode =ENABLE; //模數(shù)轉(zhuǎn)換工作在掃描模式
  71. ADC_InitStructure.ADC_ContinuousConvMode = ENABLE; //模數(shù)轉(zhuǎn)換工作在連續(xù)轉(zhuǎn)換模式
  72. ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None; //外部觸發(fā)轉(zhuǎn)換關(guān)閉
  73. ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right; //ADC數(shù)據(jù)右對(duì)齊
  74. ADC_InitStructure.ADC_NbrOfChannel = M; //順序進(jìn)行規(guī)則轉(zhuǎn)換的ADC通道的數(shù)目
  75. ADC_Init(ADC1, &ADC_InitStructure); //根據(jù)ADC_InitStruct中指定的參數(shù)初始化外設(shè)ADCx的寄存器

  77. //設(shè)置指定ADC的規(guī)則組通道，設(shè)置它們的轉(zhuǎn)化順序和采樣時(shí)間
  78. //ADC1,ADC通道x,規(guī)則采樣順序值為y,采樣時(shí)間為239.5周期
  79. ADC_RegularChannelConfig(ADC1, ADC_Channel_0, 1, ADC_SampleTime_239Cycles5 );
  80. ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 2, ADC_SampleTime_239Cycles5 );
  81. ADC_RegularChannelConfig(ADC1, ADC_Channel_2, 3, ADC_SampleTime_239Cycles5 );
  82. ADC_RegularChannelConfig(ADC1, ADC_Channel_3, 4, ADC_SampleTime_239Cycles5 );
  83. ADC_RegularChannelConfig(ADC1, ADC_Channel_8, 5, ADC_SampleTime_239Cycles5 );
  84. ADC_RegularChannelConfig(ADC1, ADC_Channel_9, 6, ADC_SampleTime_239Cycles5 );
  85. ADC_RegularChannelConfig(ADC1, ADC_Channel_10, 7, ADC_SampleTime_239Cycles5 );
  86. ADC_RegularChannelConfig(ADC1, ADC_Channel_11, 8, ADC_SampleTime_239Cycles5 );
  87. ADC_RegularChannelConfig(ADC1, ADC_Channel_12, 9, ADC_SampleTime_239Cycles5 );
  88. ADC_RegularChannelConfig(ADC1, ADC_Channel_13, 10, ADC_SampleTime_239Cycles5 );
  89. ADC_RegularChannelConfig(ADC1, ADC_Channel_14, 11, ADC_SampleTime_239Cycles5 );
  90. ADC_RegularChannelConfig(ADC1, ADC_Channel_15, 12, ADC_SampleTime_239Cycles5 );
  91. // 開(kāi)啟ADC的DMA支持（要實(shí)現(xiàn)DMA功能，還需獨(dú)立配置DMA通道等參數(shù)）
  92. ADC_DMACmd(ADC1, ENABLE);

  94. ADC_Cmd(ADC1, ENABLE); //使能指定的ADC1
  95. ADC_ResetCalibration(ADC1); //復(fù)位指定的ADC1的校準(zhǔn)寄存器
  96. while(ADC_GetResetCalibrationStatus(ADC1)); //獲取ADC1復(fù)位校準(zhǔn)寄存器的狀態(tài),設(shè)置狀態(tài)則等待

  98. ADC_StartCalibration(ADC1); //開(kāi)始指定ADC1的校準(zhǔn)狀態(tài)
  99. while(ADC_GetCalibrationStatus(ADC1)); //獲取指定ADC1的校準(zhǔn)程序,設(shè)置狀態(tài)則等待

  101. }

  103. void DMA_Configuration(void)
  104. {
  105. DMA_InitTypeDef DMA_InitStructure;
  106. DMA_DeInit(DMA1_Channel1); //將DMA的通道1寄存器重設(shè)為缺省值
  107. DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&ADC1->DR; //DMA外設(shè)ADC基地址
  108. DMA_InitStructure.DMA_MemoryBaseAddr = (u32)&AD_Value; //DMA內(nèi)存基地址
  109. DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; //內(nèi)存作為數(shù)據(jù)傳輸?shù)哪康牡?br />
  110. DMA_InitStructure.DMA_BufferSize = N*M; //DMA通道的DMA緩存的大小
  111. DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable; //外設(shè)地址寄存器不變
  112. DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; //內(nèi)存地址寄存器遞增
  113. DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord; //數(shù)據(jù)寬度為16位
  114. DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord; //數(shù)據(jù)寬度為16位
  115. DMA_InitStructure.DMA_Mode = DMA_Mode_Circular; //工作在循環(huán)緩存模式
  116. DMA_InitStructure.DMA_Priority = DMA_Priority_High; //DMA通道 x擁有高優(yōu)先級(jí)
  117. DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; //DMA通道x沒(méi)有設(shè)置為內(nèi)存到內(nèi)存?zhèn)鬏?br />
  118. DMA_Init(DMA1_Channel1, &DMA_InitStructure); //根據(jù)DMA_InitStruct中指定的參數(shù)初始化DMA的通道
  119. }

  121. //配置所有外設(shè)
  122. void Init_All_Periph(void)
  123. {
  124. RCC_Configuration();
  125. GPIO_Configuration();
  126. ADC1_Configuration();
  127. DMA_Configuration();
  128. //USART1_Configuration();
  129. USART_Configuration(9600);

  131. }

  133. u16 GetVolt(u16 advalue)
  134. {
  135. return (u16)(advalue * 330 / 4096); //求的結(jié)果擴(kuò)大了100倍，方便下面求出小數(shù)
  136. }


  139. void filter(void)
  140. {
  141. int sum = 0;
  142. u8 count;
  143. for(i=0;i<12;i++)
  144. {
  145. for ( count=0;count<N;count++)
  146. {
  147. sum += AD_Value[count][i];
  148. }
  149. After_filter[i]=sum/N;
  150. sum=0;
  151. }
  152. }


  155. int main(void)
  156. {
  157. u16 value[M];
  158. init_All_Periph();
  159. SysTick_Initaize();

  161. ADC_SoftwareStartConvCmd(ADC1, ENABLE);
  162. DMA_Cmd(DMA1_Channel1, ENABLE); //啟動(dòng)DMA通道
  163. while(1)
  164. {
  165. while(USART_GetFlagStatus(USART1,USART_FLAG_TXE)==RESET);//等待傳輸完成否則第一位數(shù)據(jù)容易丟失
  166. filter();
  167. for(i=0;i<12;i++)
  168. {
  169. value[i]= GetVolt(After_filter[i]);
  170. printf("value[%d]:\t%d.%dv\n",i,value[i]/100,value[i]0) ;
  171. delay_ms(100);
  172. }
  173. }
  174. }

復(fù)制代碼
作者: 阿瓦啟    時(shí)間: 2018-10-17 18:47
C:\Users\Administrator\Desktop\C_U174T%5D`S88_B2R99B7QJ8.png
復(fù)制后出現(xiàn)這條錯(cuò)誤該怎么解決，請(qǐng)問(wèn)"eval.h"這個(gè)頭文件里放的是什么內(nèi)容
作者: xj0801    時(shí)間: 2019-9-9 08:27
阿瓦啟 發(fā)表于 2018-10-17 18:47
復(fù)制后出現(xiàn)這條錯(cuò)誤該怎么解決，請(qǐng)問(wèn)"eval.h"這個(gè)頭文件里放的是什么內(nèi)容

＃i nclude "eval.h" //頭文件（包括串口、按鍵、LED的函數(shù)聲明）



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