标题: stm32 DMA实验程序 [打印本页]
作者: 柯南240    时间: 2019-3-9 08:05
标题: stm32 DMA实验程序
stm32DMA数据传输实验

单片机源程序如下:
  1. /* Includes ------------------------------------------------------------------*/
  2. #include "stm32f10x.h"
  3. #include "LCD.h"
  4. /* Private functions ---------------------------------------------------------*/
  5. u8 buffer[100];

  7. void GPIO_Config(void)
  8. {
  9.     GPIO_InitTypeDef GPIO_InitStructure;
  10.     RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOB|RCC_APB2Periph_GPIOC|RCC_APB2Periph_GPIOD|RCC_APB2Periph_GPIOE, ENABLE);
  11. //USART的TX和RX管脚
  12.     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
  13.         GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  14.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  15.     GPIO_Init(GPIOA , &GPIO_InitStructure);
  16.     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
  17.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  18.     GPIO_Init(GPIOA, &GPIO_InitStructure);

  20. //LED灯
  21.     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9 ;
  22.     GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  23.     GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;       
  24.     GPIO_Init(GPIOC, &GPIO_InitStructure);

  26. }

  28. void USART_Config(void)
  29. {
  30.     USART_InitTypeDef USART_InitStructure;
  31.     RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
  32. //配置USART状态                                                     
  33.     USART_InitStructure.USART_BaudRate = 9600;
  34.     USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  35.     USART_InitStructure.USART_StopBits = USART_StopBits_1;
  36.     USART_InitStructure.USART_Parity = USART_Parity_No;
  37.     USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  38.     USART_InitStructure.USART_HardwareFlowControl =
  39.     USART_HardwareFlowControl_None;
  40.     USART_Init(USART1 , &USART_InitStructure);
  41.     USART_Cmd(USART1 , ENABLE);
  42. }


  45. void DMA_Config(void)
  46. {       
  47.     DMA_InitTypeDef DMA_InitStruct;
  48.     RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
  49.         DMA_InitStruct.DMA_PeripheralBaseAddr=0x40013804;
  50.         DMA_InitStruct.DMA_MemoryBaseAddr =(u32)buffer;
  51.         DMA_InitStruct.DMA_DIR = DMA_DIR_PeripheralDST;
  52.         DMA_InitStruct.DMA_BufferSize = 100;
  53.         DMA_InitStruct.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  54.         DMA_InitStruct.DMA_MemoryInc = DMA_MemoryInc_Enable;
  55.         DMA_InitStruct.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  56.         DMA_InitStruct.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  57.         DMA_InitStruct.DMA_Mode = DMA_Mode_Normal;
  58.         DMA_InitStruct.DMA_Priority = DMA_Priority_VeryHigh;
  59.     DMA_InitStruct.DMA_M2M = DMA_M2M_Disable;
  60.     DMA_Init(DMA1_Channel4, &DMA_InitStruct);
  61. }


  64. void putData(u8 ch)
  65. {
  66.     USART_SendData(USART1,ch);
  67.     while(USART_GetFlagStatus(USART1,USART_FLAG_TC)==RESET);
  68. }



  72. void Delay(unsigned k)
  73. {
  74.         unsigned j;
  75.         for(j=0;j<=k;j++);
  76. }

  78. void Led1(void)
  79. {
  80.     GPIO_ResetBits(GPIOC, GPIO_Pin_6);
  81.         Delay(0xfffff);
  82.         GPIO_SetBits(GPIOC, GPIO_Pin_6);
  83. }

  85. void Led4(void)
  86. {
  87.     GPIO_SetBits(GPIOC, GPIO_Pin_9);
  88.         Delay(0xfffff);
  89.         GPIO_ResetBits(GPIOC, GPIO_Pin_9);
  90. }


  93. int main(void)
  94. {
  95.     unsigned i,j=0;
  96.     unsigned char TxBuf1[100] = " welcome to yubing's home!";
  97.     #ifdef DEBUG
  98.     debug();                                                                       
  99.     #endif
  100.     SystemInit();
  101.         lcd_init  ();
  102.     GPIO_Config();
  103.         USART_Config();
  104.         DMA_Config();
  105.         lcd_clear ();
  106.         lcd_putCustomChar();
  107.         lcd_print("is a pig");
  108.     for(i=0;i<=100;i++)
  109.          {
  110.     buffer[j]=TxBuf1[i];
  111.         j++;
  112.      }
  113.         USART_DMACmd(USART1,USART_DMAReq_Tx,ENABLE);
  114.         DMA_Cmd(DMA1_Channel4, ENABLE);
  115.         while(DMA_GetFlagStatus(DMA1_FLAG_TC4)==RESET)
  116.         {
  117.         Led4();
  118.         }
  119. while(1)
  120.   {


  123.   }
  124. }


  127. /******************* (C) COPYRIGHT 2011 STMicroelectronics *****END OF FILE****/
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作者: admin    时间: 2019-3-10 21:18
本帖需要重新编辑补全电路原理图,源码,详细说明与图片即可获得100+黑币(帖子下方有编辑按钮)



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