[求助] 关于串口的重映射

Aulin 2011-10-12 11:38 楼主

GPIO_InitTypeDef GPIO_InitStructure;
ErrorStatus HSEStartUpStatus;
USART_InitTypeDef USART_InitStructure; //定义一个结构体
NVIC_InitTypeDef NVIC_InitStructure;
/* Private function prototypes -----------------------------------------------*/
void RCC_Configuration(void);
void NVIC_Configuration(void);

void Uart2_PutChar(unsigned char ch)
{
   USART_SendData(USART3, ch);
   while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);//等待数据发送完毕
}
void HardwareInit(void);
void Delay(void)    //延时函数
{
unsigned long ik;
for(ik=0;ik<0xffff8;ik++) ;
}
/* Private functions ---------------------------------------------------------*/

/*******************************************************************************
* Function Name : main
* Description    : Main program.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/

int main(void)             //main函数
{
// unsigned short RxData=0;
   RCC_Configuration();   //配置系统时钟，设置系统时钟为72M
   NVIC_Configuration(); //配置中断
   HardwareInit();
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);   //重映射时钟
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC,ENABLE);   //GPIOC 时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3 , ENABLE); //USART3时钟
GPIO_PinRemapConfig(GPIO_PartialRemap_USART3, ENABLE); //将USART3局部重映射到PC10，PC11

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;             //管脚10
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;       //复用推挽输出
GPIO_Init(GPIOC, &GPIO_InitStructure);                //TX初始化

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;            //管脚11
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入
GPIO_Init(GPIOC, &GPIO_InitStructure);
USART_InitStructure.USART_BaudRate   = 9600;                  //波特率9600
USART_InitStructure.USART_WordLength = USART_WordLength_8b;   //字长8位
USART_InitStructure.USART_StopBits   = USART_StopBits_1;      //1位停止
USART_InitStructure.USART_Parity     = USART_Parity_No;       //无奇偶校验
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无流控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;//打开Rx接收和Tx发送功能

USART_Init(USART3, &USART_InitStructure); //初始化
USART_Cmd(USART3, ENABLE);

while (1)
{
Uart2_PutChar(0xaa);
//RxData = USART_ReceiveData(USART2);

Delay();Delay(); //延时
}

}

//----------------------------------------------------------------------------
//以下为子函数
void HardwareInit()
{
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD , ENABLE); //打开外设D的时钟
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB , ENABLE); //打开外设B的时钟
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOE , ENABLE); //打开外设E的时钟
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOG , ENABLE); //打开外设G的时钟
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOF , ENABLE);
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC , ENABLE);
//配置控制LED所在外设PD0--7脚为输出
   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7|
                                 GPIO_Pin_8 | GPIO_Pin_9 | GPIO_Pin_10 | GPIO_Pin_11;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //I/O口的方向
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口50MHz输出速度
   GPIO_Init(GPIOD, &GPIO_InitStructure);   //初始化外设D端口

   GPIO_InitStructure.GPIO_Pin = GPIO_Pin_12 | GPIO_Pin_13 | GPIO_Pin_14 | GPIO_Pin_15;
   GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP; //I/O口的方向
   GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口50MHz输出速度
   GPIO_Init(GPIOB, &GPIO_InitStructure);

//配置输入口
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //I/O口的方向，输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口的最高输出速度
GPIO_Init(GPIOD, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //I/O口的方向，输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口的最高输出速度
GPIO_Init(GPIOG, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0 | GPIO_Pin_1;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //I/O口的方向，输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口的最高输出速度
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2 | GPIO_Pin_3 | GPIO_Pin_4 | GPIO_Pin_5 | GPIO_Pin_6;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //I/O口的方向，输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口的最高输出速度
GPIO_Init(GPIOE, &GPIO_InitStructure);

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_All;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //I/O口的方向，输入
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; //I/O口的最高输出速度
GPIO_Init(GPIOF, &GPIO_InitStructure);
GPIO_Write(GPIOD, 0);
GPIO_Write(GPIOB, 0);
GPIO_Write(GPIOE, 0);
GPIO_Write(GPIOG, 0);
}
/*******************************************************************************
* Function Name : RCC_Configuration
* Description    : Configures the different system clocks.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void RCC_Configuration(void)
{
/* RCC system reset(for debug purpose) */
RCC_DeInit();

/* Enable HSE */
RCC_HSEConfig(RCC_HSE_ON);

/* Wait till HSE is ready */
HSEStartUpStatus = RCC_WaitForHSEStartUp();

if(HSEStartUpStatus == SUCCESS)
{
/* Enable Prefetch Buffer */
FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);

    /* Flash 2 wait state */
    FLASH_SetLatency(FLASH_Latency_2);

    /* HCLK = SYSCLK */
    RCC_HCLKConfig(RCC_SYSCLK_Div1);

    /* PCLK2 = HCLK */
    RCC_PCLK2Config(RCC_HCLK_Div1);

/* PCLK1 = HCLK/2 */
RCC_PCLK1Config(RCC_HCLK_Div2);

/* PLLCLK = 8MHz * 9 = 72 MHz */
RCC_PLLConfig(RCC_PLLSource_HSE_Div1, RCC_PLLMul_9);

/* Enable PLL */
RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

/* Select PLL as system clock source */
RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
}
}

/*******************************************************************************
* Function Name : NVIC_Configuration
* Description    : Configures Vector Table base location.
* Input          : None
* Output         : None
* Return         : None
*******************************************************************************/
void NVIC_Configuration(void)
{
#ifdef VECT_TAB_RAM
/* Set the Vector Table base location at 0x20000000 */
NVIC_SetVectorTable(NVIC_VectTab_RAM, 0x0);
#else /* VECT_TAB_FLASH */
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
#endif
}

/*******************************************************************************
* Function Name : Delay
* Description    : Inserts a delay time.
* Input          : nCount: specifies the delay time length.
* Output         : None
* Return         : None
*******************************************************************************/

#ifdef DEBUG
/*******************************************************************************
* Function Name : assert_failed
* Description    : Reports the name of the source file and the source line number
*                  where the assert_param error has occurred.
* Input          : - file: pointer to the source file name
*                  - line: assert_param error line source number
* Output         : None
* Return         : None
*******************************************************************************/
void assert_failed(u8* file, u32 line)
{
/* User can add his own implementation to report the file name and line number,
     ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */

/* Infinite loop */
while (1)
{
}
}
#endif