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[STM]使用STM32单片机通过emWin的GRAPH控件显示波形 [复制链接]

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离线inthesun
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只看楼主 倒序阅读 我要置顶 楼主  发表于: 2016-05-28
使用emWin已经有一段时间了，一直没用过GRAPH波形显示控件，前两天无聊，想利用STM32单片机ADC采样，通过GRAPH控件进行显示，看看效果怎么样。
单片机使用的是STM32F103ZET6，它提供了3路独立ADC转换通道，其中ADC1、ADC3支持DMA传输，ADC使用DMA的时候要注意对应的DMA通道号，否则无法进行传输，刚开始在这边浪费了不少时间。同时开启DMA传输完成中断，通过DMA传输中断标志，更新波形数据。


ADC初始化部分代码：
复制代码
  1. unsigned char DMA1_TransferCompleteFlag = 0, DMA2_TransferCompleteFlag = 0;
  2. #define ADC1_DR_Address    ((uint32_t)0x4001244C)//ADC数据寄存器的基地址
  3. #define ADC2_DR_Address    ((uint32_t)0x4001284C)
  4. #define ADC3_DR_Address    ((uint32_t)0x40013C4C)
  6. //ADC_DR(ADC规则数据寄存器),偏移量=0x4c  ADC1(0x40012400-0x400127ff)
  7. //so ADC1_DR_Address=0x40012400+0x4c
  8. //==========================================================================================
  9. unsigned short    ADC1ConvertedValue[500];
  10. unsigned short    ADC3ConvertedValue[500];
  11. unsigned short     CH1_Buffer[500];
  12. unsigned short     CH2_Buffer[500];
  14. void ADC1_Init(void)
  15. {
  16.     ADC_InitTypeDef        ADC_InitStructure;
  17.     GPIO_InitTypeDef    GPIO_InitStructure;
  18.     DMA_InitTypeDef        DMA_InitStructure;
  19.     NVIC_InitTypeDef    NVIC_InitStructure;
  20.     
  21.     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);         //使能DMA时钟
  22.     RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC1 | RCC_APB2Periph_GPIOA, ENABLE);      //使能ADC和GPIOC时钟
  23.     RCC_ADCCLKConfig(RCC_PCLK2_Div2);   //设置ADC分频因子2 72M/2=32,？ADC最大时间不能超过14M
  24.     
  25.     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
  26.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;        //模拟输入引脚
  27.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  28.     GPIO_Init(GPIOA, &GPIO_InitStructure);
  29.     
  30.     DMA_DeInit(DMA1_Channel1);          //开启DMA1的第一通道
  31.     DMA_ITConfig(DMA1_Channel1, DMA_IT_TC, ENABLE);//开启中断
  32.     DMA_InitStructure.DMA_PeripheralBaseAddr = ADC1_DR_Address;          //DMA对应的外设基地址
  33.     DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC1ConvertedValue;   //内存存储基地址
  34.     DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;                  //DMA的转换模式为SRC模式，由外设搬移到内存
  35.     DMA_InitStructure.DMA_BufferSize = 500;           //DMA缓存大小，500个
  36.     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;    //接收一次数据后，设备地址禁止后移
  37.     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;    //接收一次数据后，目标内存地址后移
  38.     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;  //定义外设数据宽度为16位
  39.     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;  //DMA搬移数据尺寸，HalfWord就是为16位
  40.     DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;   //转换模式，循环缓存模式。
  41.     DMA_InitStructure.DMA_Priority = DMA_Priority_High;    //DMA优先级高
  42.     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;          //M2M模式禁用
  43.     DMA_Init(DMA1_Channel1, &DMA_InitStructure);
  44.     DMA_Cmd(DMA1_Channel1, ENABLE);
  45.     
  46.     NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel1_IRQn;
  47.     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级3
  48.     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;        //子优先级3
  49.     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;            //IRQ通道使能
  50.     NVIC_Init(&NVIC_InitStructure);    //根据指定的参数初始化VIC寄存器
  51.     
  52.     ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;        //独立的转换模式
  53.     ADC_InitStructure.ADC_ScanConvMode = DISABLE;          //开启扫描模式
  54.     ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;   //开启连续转换模式
  55.     ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;    //ADC外部开关，关闭状态
  56.     ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;   //对齐方式,ADC为12位中，右对齐方式
  57.     ADC_InitStructure.ADC_NbrOfChannel = 1;     //开启通道数，1个
  58.     ADC_Init(ADC1, &ADC_InitStructure);
  59.     
  60.     ADC_RegularChannelConfig(ADC1, ADC_Channel_1, 1, ADC_SampleTime_1Cycles5);      
  61.     ADC_DMACmd(ADC1, ENABLE);      //ADC命令，使能
  62.     ADC_Cmd(ADC1, ENABLE);  //开启ADC
  63.     ADC_ResetCalibration(ADC1);      //重新校准
  64.     while(ADC_GetResetCalibrationStatus(ADC1));  //等待重新校准完成
  65.     ADC_StartCalibration(ADC1);        //开始校准
  66.     while(ADC_GetCalibrationStatus(ADC1));       //等待校准完成
  67.     ADC_SoftwareStartConvCmd(ADC1, ENABLE);    //连续转换开始，ADC通过DMA方式不断的更新RAM区。
  68. }
  70. void ADC3_Init(void)
  71. {
  72.     ADC_InitTypeDef        ADC_InitStructure;
  73.     GPIO_InitTypeDef    GPIO_InitStructure;
  74.     DMA_InitTypeDef        DMA_InitStructure;
  75.     NVIC_InitTypeDef    NVIC_InitStructure;
  76.     
  77.     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);         //使能DMA时钟
  78.     RCC_APB2PeriphClockCmd(RCC_APB2Periph_ADC3 | RCC_APB2Periph_GPIOA, ENABLE);      //使能ADC和GPIOC时钟
  79.     RCC_ADCCLKConfig(RCC_PCLK2_Div2);   //设置ADC分频因子2 72M/2=32,？ADC最大时间不能超过14M
  80.     
  81.     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
  82.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AIN;        //模拟输入引脚
  83.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  84.     GPIO_Init(GPIOA, &GPIO_InitStructure);
  85.     
  86.     DMA_DeInit(DMA2_Channel5);          //开启DMA2的第一通道
  87.     DMA_ITConfig(DMA2_Channel5, DMA_IT_TC, ENABLE);//开启中断
  88.     DMA_InitStructure.DMA_PeripheralBaseAddr = ADC3_DR_Address;          //DMA对应的外设基地址
  89.     DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)&ADC3ConvertedValue;   //内存存储基地址
  90.     DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;                  //DMA的转换模式为SRC模式，由外设搬移到内存
  91.     DMA_InitStructure.DMA_BufferSize = 500;           //DMA缓存大小，500个
  92.     DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;    //接收一次数据后，设备地址禁止后移
  93.     DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;    //接收一次数据后，目标内存地址后移
  94.     DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;  //定义外设数据宽度为16位
  95.     DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;  //DMA搬移数据尺寸，HalfWord就是为16位
  96.     DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;   //转换模式，循环缓存模式。
  97.     DMA_InitStructure.DMA_Priority = DMA_Priority_High;    //DMA优先级高
  98.     DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;          //M2M模式禁用
  99.     DMA_Init(DMA2_Channel5, &DMA_InitStructure);
  100.     DMA_Cmd(DMA2_Channel5, ENABLE);
  101.     
  102.     NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel4_5_IRQn;
  103.     NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//抢占优先级3
  104.     NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;        //子优先级3
  105.     NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;            //IRQ通道使能
  106.     NVIC_Init(&NVIC_InitStructure);    //根据指定的参数初始化VIC寄存器
  107.   
  108.     ADC_InitStructure.ADC_Mode = ADC_Mode_RegSimult;        //独立的转换模式
  109.     ADC_InitStructure.ADC_ScanConvMode = DISABLE;          //开启扫描模式
  110.     ADC_InitStructure.ADC_ContinuousConvMode = ENABLE;   //开启连续转换模式
  111.     ADC_InitStructure.ADC_ExternalTrigConv = ADC_ExternalTrigConv_None;    //ADC外部开关，关闭状态
  112.     ADC_InitStructure.ADC_DataAlign = ADC_DataAlign_Right;   //对齐方式,ADC为12位中，右对齐方式
  113.     ADC_InitStructure.ADC_NbrOfChannel = 1;     //开启通道数，1个
  114.     ADC_Init(ADC3, &ADC_InitStructure);
  115.     
  116.     ADC_RegularChannelConfig(ADC3, ADC_Channel_0, 1, ADC_SampleTime_1Cycles5);      
  118.     ADC_DMACmd(ADC3, ENABLE);      //ADC命令，使能
  119.     ADC_Cmd(ADC3, ENABLE);  //开启ADC
  120.     ADC_ResetCalibration(ADC1);      //重新校准
  121.     while(ADC_GetResetCalibrationStatus(ADC3));  //等待重新校准完成
  122.     ADC_StartCalibration(ADC3);        //开始校准
  123.     while(ADC_GetCalibrationStatus(ADC3));       //等待校准完成
  124.     ADC_SoftwareStartConvCmd(ADC3, ENABLE);    //连续转换开始，ADC通过DMA方式不断的更新RAM区。
  125. }
  127. void DMA1_Channel1_IRQHandler()
  128. {
  129.     ADC_DMACmd(ADC1, DISABLE);      //ADC命令，禁止    
  130.     if(DMA_GetITStatus(DMA1_IT_TC1))
  131.     {    
  132.         DMA1_TransferCompleteFlag = 1;
  133.         DMA_ClearITPendingBit(DMA1_IT_GL1);
  134.     }
  135. }
  137. void DMA2_Channel4_5_IRQHandler()
  138. {
  139.     ADC_DMACmd(ADC3, DISABLE);      //ADC命令，禁止
  140.     if(DMA_GetITStatus(DMA2_IT_TC5))
  141.     {    
  142.         DMA2_TransferCompleteFlag = 1;
  143.         DMA_ClearITPendingBit(DMA2_IT_GL5);
  144.     }
  145. }
获取了ADC数据，接下来就是对数据进行波形显示了。首先需要创建一个小工具hGraph，创建两个数据对象hData[2]，分别保存ADC1和ADC3的转化数据，然后将创建的数据附加到小工具hGraph，具体代码如下：
复制代码
  1. int ChOffset_y[2] = {100, 25};
  3. #define COLOR_BK          GUI_BLACK
  4. #define COLOR_BORDER      GUI_DARKBLUE
  5. #define COLOR_FRAME       GUI_LIGHTCYAN
  6. #define COLOR_GRID        GUI_GRAY
  8. static GUI_CONST_STORAGE GUI_COLOR _aColorsCh1Arrow[] = {
  9.   0xFFFFFF, GUI_YELLOW
  10. };
  11. static GUI_CONST_STORAGE GUI_COLOR _aColorsCh2Arrow[] = {
  12.   0xFFFFFF, GUI_GREEN
  13. };
  15. static GUI_CONST_STORAGE GUI_COLOR _aChColors[] = {
  16.   GUI_YELLOW, GUI_GREEN
  17. };
  19. static GUI_CONST_STORAGE GUI_LOGPALETTE _PalCh1Arrow = {
  20.   2,
  21.   1,
  22.   &_aColorsCh1Arrow[0]
  23. };
  24. static GUI_CONST_STORAGE GUI_LOGPALETTE _PalCh2Arrow = {
  25.   2,
  26.   1,
  27.   &_aColorsCh2Arrow[0]
  28. };
  30. static GUI_CONST_STORAGE unsigned char _acp[] = {
  31.   X_______,
  32.   XX______,
  33.   XXXX____,
  34.   XXXXXX__,
  35.   XXXX____,
  36.   XX______,
  37.   X_______,
  38. };
  39. static GUI_CONST_STORAGE GUI_BITMAP _Ch1bmp = {
  40.   8,            /* XSize */
  41.   7,             /* YSize */
  42.   1,             /* BytesPerLine */
  43.   1,             /* BitsPerPixel */
  44.   _acp,  /* Pointer to picture data (indices) */
  45.   &_PalCh1Arrow     /* Pointer to palette */
  46. };
  47. static GUI_CONST_STORAGE GUI_BITMAP _Ch2bmp = {
  48.   8,            /* XSize */
  49.   7,             /* YSize */
  50.   1,             /* BytesPerLine */
  51.   1,             /* BitsPerPixel */
  52.   _acp,  /* Pointer to picture data (indices) */
  53.   &_PalCh2Arrow     /* Pointer to palette */
  54. };
  56. static void _UserDraw(WM_HWIN hWin, int Stage) {
  57.     GUI_RECT Rect;
  58.     unsigned short i;    
  59.     WM_GetInsideRect(&Rect);
  60.     
  61.     if (Stage == GRAPH_DRAW_LAST) {
  62.         GUI_DrawBitmap(&_Ch1bmp, Rect.x0, Rect.y1-ChOffset_y[0]-30);
  63.         GUI_DrawBitmap(&_Ch2bmp, Rect.x0, Rect.y1-ChOffset_y[1]-30);        
  64.     }
  65.     else if (Stage == GRAPH_DRAW_FIRST) {
  66.         GUI_SetColor(COLOR_GRID);    
  67.         for (i=Rect.x0+7; i<Rect.x0+7+250; i+=5){//横
  68.             GUI_DrawPixel(i, Rect.y0+12+1);
  69.             GUI_DrawPixel(i, Rect.y0+12+2);        
  70.             GUI_DrawPixel(i, Rect.y0+12+25);    
  71.             GUI_DrawPixel(i, Rect.y0+12+50);
  72.             GUI_DrawPixel(i, Rect.y0+12+75);    
  73.             GUI_DrawPixel(i, Rect.y0+12+99);        
  74.             GUI_DrawPixel(i, Rect.y0+12+100);    
  75.             GUI_DrawPixel(i, Rect.y0+12+101);
  76.             GUI_DrawPixel(i, Rect.y0+12+125);        
  77.             GUI_DrawPixel(i, Rect.y0+12+150);    
  78.             GUI_DrawPixel(i, Rect.y0+12+175);        
  79.             GUI_DrawPixel(i, Rect.y0+12+199);    
  80.             GUI_DrawPixel(i, Rect.y0+12+200);        
  81.         }
  82.         for (i=Rect.y0+12; i<Rect.y0+12+200; i+=5){//竖
  83.             GUI_DrawPixel(Rect.x0+7+1, i);
  84.             GUI_DrawPixel(Rect.x0+7+2, i);        
  85.             GUI_DrawPixel(Rect.x0+7+25, i);    
  86.             GUI_DrawPixel(Rect.x0+7+50, i);
  87.             GUI_DrawPixel(Rect.x0+7+75, i);    
  88.             GUI_DrawPixel(Rect.x0+7+100, i);        
  89.             GUI_DrawPixel(Rect.x0+7+124, i);    
  90.             GUI_DrawPixel(Rect.x0+7+125, i);
  91.             GUI_DrawPixel(Rect.x0+7+126, i);        
  92.             GUI_DrawPixel(Rect.x0+7+150, i);    
  93.             GUI_DrawPixel(Rect.x0+7+175, i);        
  94.             GUI_DrawPixel(Rect.x0+7+200, i);    
  95.             GUI_DrawPixel(Rect.x0+7+225, i);    
  96.             GUI_DrawPixel(Rect.x0+7+249, i);    
  97.             GUI_DrawPixel(Rect.x0+7+250, i);        
  98.         }
  99.     }
  100. }
  102. #define BUTTON_UNPRESSED_BKCOLOR    GUI_DARKGREEN
  103. #define BUTTON_PRESSED_BKCOLOR        GUI_LIGHTGREEN
  104. #define BUTTON_TEXTCOLOR            GUI_WHITE
  106. void Task_Gui(void *pdata)
  107. {
  108.     OS_ERR                 err;
  109.     WM_HWIN             hGraph,    hItem;
  110.     GRAPH_DATA_Handle   hData[2];    
  111.     unsigned short    threshold_value = 3000;
  112.     unsigned int    Xsync=0;
  113.     unsigned int    i=0;
  115.     GUI_Init(); //STemWin初始化
  116.     WM_SetDesktopColor(GUI_BLACK);
  117.     WM_SetCreateFlags(WM_CF_MEMDEV);
  119.     hGraph = GRAPH_CreateEx(0, 0, 320, 240, WM_HBKWIN, WM_CF_SHOW | WM_CF_CONST_OUTLINE, 0, 0);
  120.     GRAPH_SetUserDraw(hGraph, _UserDraw);
  121.     GRAPH_SetBorder(hGraph, 8, 13, 320-8-250, 240-13-200);
  122.     WM_SetHasTrans (hGraph);
  123.     WIDGET_SetEffect(hGraph, &WIDGET_Effect_None);
  124.     GRAPH_SetColor (hGraph, COLOR_BK,     GRAPH_CI_BK);
  125.     GRAPH_SetColor (hGraph, COLOR_BORDER, GRAPH_CI_BORDER);
  126.     GRAPH_SetColor (hGraph, COLOR_FRAME,  GRAPH_CI_FRAME);
  127.     GRAPH_SetColor (hGraph, COLOR_GRID,   GRAPH_CI_GRID);
  128.   //GRAPH_SetGridVis  (hGraph, 1);    //自绘网格线，这里禁止
  129.   //GRAPH_SetLineStyleH(hGraph, GUI_LS_DOT);
  130.   //GRAPH_SetLineStyleV(hGraph, GUI_LS_DOT);    
  131.     GRAPH_SetGridDistX(hGraph, 25);
  132.     GRAPH_SetGridDistY(hGraph, 25);
  133.     GRAPH_SetGridFixedX(hGraph, 1);
  135.     for (i=0; i<2; i++) {
  136.         hData[i] = GRAPH_DATA_YT_Create(_aChColors[i], 250, 0, 0);
  137.         GRAPH_AttachData(hGraph, hData[i]);
  138.         GRAPH_DATA_YT_SetOffY(hData[i], ChOffset_y[i]);
  139.         GRAPH_DATA_YT_SetAlign(hData[i], GRAPH_ALIGN_LEFT);
  140.     }
  142.     for (i=0; i<5; i++) {
  143.         hItem = BUTTON_CreateEx(8+250+5,12+i*42,52,34,hGraph, WM_CF_SHOW | WM_CF_CONST_OUTLINE, 0, 0);
  144.         BUTTON_SetTextAlign(hItem, GUI_TA_HCENTER|GUI_TA_VCENTER);
  145.         BUTTON_SetBkColor(hItem, BUTTON_CI_UNPRESSED, BUTTON_UNPRESSED_BKCOLOR);
  146.         BUTTON_SetBkColor(hItem, BUTTON_CI_PRESSED, BUTTON_PRESSED_BKCOLOR);
  147.         BUTTON_SetTextColor(hItem, BUTTON_BI_UNPRESSED, BUTTON_TEXTCOLOR);
  148.         BUTTON_SetTextColor(hItem, BUTTON_BI_PRESSED, BUTTON_TEXTCOLOR);
  149.         BUTTON_SetFocussable(hItem, 0);// Set all buttons non focussable
  150.         WIDGET_SetEffect(hItem, &WIDGET_Effect_None);//1??3DD??
  151.     }
  153.     while(1) {
  154.         GUI_Exec();    
  155.         OSTimeDlyHMSM(0,0,0,10,OS_OPT_TIME_PERIODIC,&err);//延时10ms
  156.         
  157.         if (DMA1_TransferCompleteFlag && DMA2_TransferCompleteFlag)    {
  158.             DMA2_TransferCompleteFlag = 0;
  159.             DMA1_TransferCompleteFlag = 0;
  160.             for(i=0; i<500; i++) {
  161.                 CH1_Buffer[i] = ADC1ConvertedValue[i];
  162.                 CH2_Buffer[i] = ADC3ConvertedValue[i];    
  163.             }
  164.             ADC_DMACmd(ADC1, ENABLE);      //ADC命令，使能
  165.             ADC_DMACmd(ADC3, ENABLE);      //ADC命令，使能
  166.         
  167.             for(i=125; i<500-125; i++){
  168.                 if (CH1_Buffer[i]    < threshold_value    &&
  169.                     CH1_Buffer[i+1] > threshold_value){
  170.                     Xsync = i-125;
  171.                     break;
  172.                 }        
  173.             }
  174.             GRAPH_DATA_YT_Clear(hData[0]);
  175.             GRAPH_DATA_YT_Clear(hData[1]);
  176.             for (i=0; i<250; i++) {//更新hData数据
  177.                 GRAPH_DATA_YT_AddValue(hData[0], (((CH1_Buffer[Xsync+i]>>6)*165)>>6)>>1);
  178.                 GRAPH_DATA_YT_AddValue(hData[1], (((CH2_Buffer[Xsync+i]>>6)*165)>>6)>>1);
  179.             }
  180.         }
  181.     }
  182. }
用555搭了个多谐振荡器产生一路信号，然后再RC积分电路产生一路信号，信号频率57K左右，最后显示照片：





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