#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