串口配置代码如下
[mw_shl_code=c,true]void uart_init(uint32_t bound) { GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);//使能A口时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_SYSCFG,ENABLE);//使能串口1时钟 //USART_DeInit(USART1); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //复用 GPIO_InitStructure.GPIO_OType =GPIO_OType_PP ; //推挽输出 GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//上拉 GPIO_PinAFConfig(GPIOA, GPIO_Pin_9, GPIO_AF_7);//USART1串口复用 GPIO_Init(GPIOA, &GPIO_InitStructure); GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PA.10 //GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN;//输入 //GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_NOPULL;//浮空 GPIO_PinAFConfig(GPIOA, GPIO_Pin_10, GPIO_AF_7);//USART1串口复用 GPIO_Init(GPIOA, &GPIO_InitStructure); USART_StructInit(&USART_InitStructure); USART_InitStructure.USART_BaudRate = bound;//波特率 USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式 USART_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位 USART_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位 USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制 USART_Init(USART1, &USART_InitStructure); //初始化串口 #if EN_USART1_RX //如果使能了接收 //Usart1 NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//抢占优先级3 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //子优先级3 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ通道使能 NVIC_Init(&NVIC_InitStructure); //根据指定的参数初始化VIC寄存器 USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启中断 #endif USART_Cmd(USART1, ENABLE); //使能串口 }[/mw_shl_code]