stm32 DMA数据搬运 [操作寄存器+库函数]（转）

#include "stm32f10x.h"
#include "stdio.h"
#include "string.h"

#define     PRINTF_ON  1
#define  BufferSize  32

vu16 LeftDataCounter;
vu32 Tick;

uc32 SRC_Const_Buffer[BufferSize] = 
{    
    0x01020304,0x05060708,0x090A0B0C,0x0D0E0F10,
    0x11121314,0x15161718,0x191A1B1C,0x1D1E1F20,
    0x21222324,0x25262728,0x292A2B2C,0x2D2E2F30,
    0x31323334,0x35363738,0x393A3B3C,0x3D3E3F40,
    0x41424344,0x45464748,0x494A4B4C,0x4D4E4F50,
    0x51525354,0x55565758,0x595A5B5C,0x5D5E5F60,
    0x61626364,0x65666768,0x696A6B6C,0x6D6E6F70,
    0x71727374,0x75767778,0x797A7B7C,0x7D7E7F80
};

u32 DST_Buffer[BufferSize];
u8 i=0,DMASpendTime=0,CPUSpendTime=0;

void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void USART_Configuration(void);
void DMA_Configuration(void);


int main(void)
{
      RCC_Configuration();
      GPIO_Configuration();
    NVIC_Configuration();
    USART_Configuration();
    DMA_Configuration();

    SysTick_Config(72);

    Tick = 0;
    while(i<BufferSize)
    {
        DST_Buffer[i]=SRC_Const_Buffer[i];
        CPUSpendTime = Tick;
        i++;
    }
    i=0;
      while(i<BufferSize)
    {
        DST_Buffer[i]=0;
        i++;
    }

    Tick = 0;
    DMA_Cmd(DMA1_Channel6,ENABLE);
    while(LeftDataCounter != 0);    //等待传输完成
    DMASpendTime = Tick;
    
    

    if(strncmp((const char *)SRC_Const_Buffer,(const char *)DST_Buffer,BufferSize) ==0)
    {
        printf("\r\n Transmit Success! \r\n");
    }else{
         printf("\r\n Transmit Fail! \r\n");
    }

    printf("\r\n the CPU spend : %dus! \r\n",CPUSpendTime);
    printf("\r\n the DMA spend : %dus! \r\n",DMASpendTime);

}

void DMA_Configuration(void)
{
    DMA_InitTypeDef DMA_InitStructure;

    DMA_DeInit(DMA1_Channel6);
    DMA_InitStructure.DMA_PeripheralBaseAddr = (u32) SRC_Const_Buffer;
    DMA_InitStructure.DMA_MemoryBaseAddr = (u32) DST_Buffer;
    DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
    DMA_InitStructure.DMA_BufferSize = BufferSize;
    DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;
    DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
    DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
    DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
    DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
    DMA_InitStructure.DMA_Priority = DMA_Priority_High;
    DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;
    DMA_Init(DMA1_Channel6,&DMA_InitStructure);

    DMA_ITConfig(DMA1_Channel6,DMA_IT_TC,ENABLE);
}

void GPIO_Configuration(void)
{
      GPIO_InitTypeDef GPIO_InitStructure;
       GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;            
      GPIO_Init(GPIOA , &GPIO_InitStructure); 
      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
      GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;            
      GPIO_Init(GPIOA , &GPIO_InitStructure); 

}


void RCC_Configuration(void)
{
    /* 定义枚举类型变量 HSEStartUpStatus */
    ErrorStatus HSEStartUpStatus;

      /* 复位系统时钟设置*/
      RCC_DeInit();
      /* 开启HSE*/
      RCC_HSEConfig(RCC_HSE_ON);
      /* 等待HSE起振并稳定*/
      HSEStartUpStatus = RCC_WaitForHSEStartUp();
    /* 判断HSE起是否振成功，是则进入if()内部 */
      if(HSEStartUpStatus == SUCCESS)
      {
        /* 选择HCLK（AHB）时钟源为SYSCLK 1分频 */
        RCC_HCLKConfig(RCC_SYSCLK_Div1); 
        /* 选择PCLK2时钟源为 HCLK（AHB） 1分频 */
        RCC_PCLK2Config(RCC_HCLK_Div1); 
        /* 选择PCLK1时钟源为 HCLK（AHB） 2分频 */
        RCC_PCLK1Config(RCC_HCLK_Div2);
        /* 设置FLASH延时周期数为2 */
        FLASH_SetLatency(FLASH_Latency_2);
        /* 使能FLASH预取缓存 */
        FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);
        /* 选择锁相环（PLL）时钟源为HSE 1分频，倍频数为9，则PLL输出频率为 8MHz * 9 = 72MHz */
        RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);
        /* 使能PLL */ 
        RCC_PLLCmd(ENABLE);
        /* 等待PLL输出稳定 */
        while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);
        /* 选择SYSCLK时钟源为PLL */
        RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);
        /* 等待PLL成为SYSCLK时钟源 */
        while(RCC_GetSYSCLKSource() != 0x08);
      } 
      /* 打开APB2总线上的GPIOA时钟*/
      RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA|RCC_APB2Periph_USART1, ENABLE);
    RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

    //RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP|RCC_APB1Periph_WWDG, ENABLE);
        
}

 
void USART_Configuration(void)
{
    USART_InitTypeDef USART_InitStructure;
    USART_ClockInitTypeDef USART_ClockInitStructure;

    USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
    USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
    USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;                                                                                                                                                      
    USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
    USART_ClockInit(USART1 , &USART_ClockInitStructure);

    USART_InitStructure.USART_BaudRate = 9600;
    USART_InitStructure.USART_WordLength = USART_WordLength_8b;
    USART_InitStructure.USART_StopBits = USART_StopBits_1;
    USART_InitStructure.USART_Parity = USART_Parity_No;
    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
    USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
    USART_Init(USART1,&USART_InitStructure);

     USART_Cmd(USART1,ENABLE);
}

void NVIC_Configuration(void)
{
    NVIC_InitTypeDef NVIC_InitStructure;
    
    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);    

    NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel6_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init(&NVIC_InitStructure);
}

#if     PRINTF_ON

int fputc(int ch,FILE *f)
{
    USART_SendData(USART1,(u8) ch);
    while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET);
    return ch;
}

#endif

#include "stm32f10x_it.h"
#include "stdio.h"


extern vu32 Tick;
extern vu16 LeftDataCounter;


void SysTick_Handler(void)
{
     Tick++;
}

void DMA1_Channel6_IRQHandler(void)
{

    LeftDataCounter = DMA_GetCurrDataCounter(DMA1_Channel6);   //获取剩余待传输数据
    DMA_ClearITPendingBit(DMA1_IT_GL6);
}