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]
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