路过，看看

太贵了，买了2个就没钱了:Cry:

太贵了，买了2个就没钱了:Cry:

//中断响应函数 void USART1_IRQHandler(void)   {       u8 i;   if (USART_GetFlagStatus(USART1, USART_FLAG_ORE) != RESET)//注意！不能使用if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)来判断     {         USART_ReceiveData(USART1);     }    //正在处理上一条通讯，接收到数据不处理 //上面一段是网上copy的，具体数据溢出标志位不太懂            if(USART_GetFlagStatus(USART1,USART_IT_RXNE)==SET)       {    USART_ClearITPendingBit(USART1, USART_IT_RXNE);                     i = USART_ReceiveData(USART1);   Buf_First_Serial[First_Int++] = USART_ReceiveData(USART1);          //将接收到的字符串存到缓存中, 缓存指针向后移动 if(First_Int > 500)                //如果缓存满,将缓存指针指向缓存的首地址 { First_Int = 0; }         /***********test code***************/ printf("interrup happen"); //跳转中断的标志 /**************************/         USART_SendData(USART1,i);           while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET)           {           }                      }

void NVIC_Configuration(void) {    NVIC_InitTypeDef NVIC_InitStructure;        /* Set the Vector Table base location at 0x08000000 */    NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);        /* Configure the NVIC Preemption Priority Bits */       NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);        /* Enable the USART1 Interrupt */    NVIC_InitStructure.NVIC_IRQChannel =USART1_IRQn ;          //通道设置为串口1接收中断    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1; //中断占先等级0    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;           //中断响应优先级0    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;            //打开中断    NVIC_Init(&NVIC_InitStructure);             //初始化 }

串口初始化（其中usart2暂时没有用到） void USART_Configuration(void) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; /* 打开GPIO和USART部件的时钟 */ RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA |RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE); RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE); /* 将USART1 Tx PB6 的GPIO配置为推挽复用模式 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOB, &GPIO_InitStructure);         /* 将USART2 Tx PA2 的GPIO配置为推挽复用模式 */ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_Init(GPIOA, &GPIO_InitStructure); /* 将USART1 Rx PB7 的GPIO配置为浮空输入模式*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOB, &GPIO_InitStructure); /*将USART2 Rx PA3 的GPIO配置为浮空输入模式*/ GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_PinRemapConfig(GPIO_Remap_USART1 , ENABLE);   //USART1完全映射 /* 配置USART参数     - BaudRate = 115200 baud     - Word Length = 8 Bits     - One Stop Bit     - No parity     - Hardware flow control disabled (RTS and CTS signals)     - Receive and transmit enabled */ 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_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(USART2, &USART_InitStructure);         /* 若接收数据寄存器满，则产生中断 */         USART_ITConfig(USART1, USART_IT_RXNE, ENABLE); /* 使能 USART， 配置完毕 */ USART_Cmd(USART1, ENABLE); USART_Cmd(USART2, ENABLE); USART_ClearFlag(USART1, USART_FLAG_TC);     /* 清发送外城标志，Transmission Complete flag */ USART_ClearFlag(USART2, USART_FLAG_TC);     /* 清发送外城标志，Transmission Complete flag */ }