標(biāo)題: STM32 DAC+DMA成功輸出正弦波 源程序 [打印本頁]
作者: WANGWWA    時間: 2019-7-24 13:58
標(biāo)題: STM32 DAC+DMA成功輸出正弦波 源程序
stm32F4正弦波輸出

單片機源程序如下:
  1. #include "dac.h"
  2. #include "sys.h"
  3. #include "math.h"
  4. #define PI  3.14159
  5. #define DAC_DHR12R1_ADDRESS     0x40007408

  7. u16 sinTable[tableSize];

  9. void sin_Generation(void)
  10. {
  11.         u16 n;
  12.         for(n=0;n<tableSize;n++)
  13.         {
  14.                 sinTable[n] = (sin(2*PI*n/tableSize)+1)*2047;       
  15.         }       
  16. }

  18. void TIM6_Configuration(void)
  19. {
  20.         RCC_APB1PeriphClockCmd(RCC_APB1Periph_TIM6, ENABLE);       

  22.         TIM_PrescalerConfig(TIM6, 83, TIM_PSCReloadMode_Update);
  23.           TIM_SetAutoreload(TIM6, 4);
  24.           TIM_SelectOutputTrigger(TIM6, TIM_TRGOSource_Update);
  25.         TIM_Cmd(TIM6, ENABLE);
  26. }

  28. void GPIO_Configuration(void)
  29. {
  30.         GPIO_InitTypeDef GPIO_InitStructure;

  32.           RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);

  34.         GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4;
  35.         GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AN;
  36.         GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;
  37.         GPIO_Init(GPIOA, &GPIO_InitStructure);
  38. }

  40. void DAC_DMA_Configuration(void)
  41. {
  42.         DAC_InitTypeDef  DAC_InitStructure;       

  44.         DMA_InitTypeDef DMA_InitStructure;

  46.         RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA1, ENABLE);
  47.        
  48.         RCC_APB1PeriphClockCmd(RCC_APB1Periph_DAC, ENABLE);

  50.         DAC_InitStructure.DAC_Trigger = DAC_Trigger_T6_TRGO;
  51.         DAC_InitStructure.DAC_WaveGeneration = DAC_WaveGeneration_None;
  52.         DAC_InitStructure.DAC_OutputBuffer = DAC_OutputBuffer_Disable;
  53.         DAC_Init(DAC_Channel_1, &DAC_InitStructure);

  55.         DMA_DeInit(DMA1_Stream5);
  56.         DMA_InitStructure.DMA_Channel = DMA_Channel_7;  
  57.         DMA_InitStructure.DMA_PeripheralBaseAddr = DAC_DHR12R1_ADDRESS;
  58.         DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)&sinTable;
  59.         DMA_InitStructure.DMA_BufferSize = tableSize;
  60.         DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
  61.         DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_HalfWord;
  62.         DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
  63.         DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  64.         DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  65.         DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  66.         DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  67.         DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;         
  68.         DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_HalfFull;
  69.         DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
  70.         DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  71.         DMA_Init(DMA1_Stream5, &DMA_InitStructure);   
  72.        
  73.         DMA_Cmd(DMA1_Stream5, ENABLE);
  74.        
  75.         DAC_Cmd(DAC_Channel_1, ENABLE);
  76.        
  77.         DAC_DMACmd(DAC_Channel_1, ENABLE);
  78. }
復(fù)制代碼

所有資料51hei提供下載:
DAC+DMA成功輸出正弦波.7z (301.68 KB, 下載次數(shù): 101)






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