/***********************************************************************
***********************************************************************/
void RCC_Configuration(void);
void GPIO_Configuration(void);
void NVIC_Configuration(void);
void delay(vu32 nCount)
{
for(; nCount != 0; nCount--);
}
/***********************************************************************
************************************************************************/

main()
{
RCC_Configuration();//系統(tǒng)時(shí)鐘配置

NVIC_Configuration();//中斷配置

GPIO_Configuration();//GPIO口配置

while(1) //LED燈循環(huán)亮滅，串口循環(huán)發(fā)送ASCII“9”
{
delay(5000000);
GPIO_WriteBit(GPIOD,GPIO_Pin_2,Bit_RESET);
USART_SendData(USART1,9);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);
{
}
delay(5000000);
GPIO_WriteBit(GPIOD,GPIO_Pin_2,Bit_SET);
}
}
/*****************************************************************************
*****************************************************************************/
//系統(tǒng)時(shí)鐘配置
void RCC_Configuration(void)
{
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);//使能串口1的GPIO時(shí)鐘
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_GPIOD, ENABLE); //pa.9 pa.10 led0
}
/*****************************************************************************
*****************************************************************************/
//串口GPIO口配置
void GPIO_Configuration(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

/* LED0*/
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_Init(GPIOD, &GPIO_InitStructure);

// GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //復(fù)用推挽輸出
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //懸浮輸入
GPIO_Init(GPIOA, &GPIO_InitStructure);


USART_InitStructure.USART_BaudRate = 9600; //設(shè)定波特率
USART_InitStructure.USART_WordLength = USART_WordLength_8b; //傳輸數(shù)據(jù)位數(shù)
USART_InitStructure.USART_StopBits = USART_StopBits_1; //停止位1
USART_InitStructure.USART_Parity = USART_Parity_No; //不用校驗(yàn)位
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//不用流量控制
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //使用接收和發(fā)送功能
USART_Init(USART1, &USART_InitStructure); //初始化串口1
USART_Cmd(USART1,ENABLE); //串口1使能

USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); //使能串口1 讀中斷

}

/*****************************************************************************
*****************************************************************************/
//中斷配置
void NVIC_Configuration(void)
{
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0); //先占優(yōu)先權(quán)2，從優(yōu)先級(jí)2位
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; //開(kāi)串口中斷1
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0; //指定搶占優(yōu)先級(jí)別1
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; //指定相應(yīng)優(yōu)先級(jí)別0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}
/*****************************************************************************
*****************************************************************************/
void USART1_IRQHandler(void) //串口接收中斷，并將接收到得數(shù)據(jù)發(fā)送出
{
u16 temp_trx;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//判斷 是否 接收中斷
{
temp_trx = USART_ReceiveData(USART1);
USART_SendData(USART1,temp_trx);
while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);//判斷 發(fā)送標(biāo)志
}
}
/*****************************************************************************
*****************************************************************************/