- //初始化IO 串口1
- //bound:波特率
- void uart_init1(u32 bound){
- //GPIO端口设置
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- USART_DeInit(USART1); //复位串口1
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //使能USART1,GPIOA时钟
-
- //USART1_TX PA.9
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出
- GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA9
- //USART1_RX PA.10
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
- GPIO_Init(GPIOA, &GPIO_InitStructure); //初始化PA10
- //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 初始化设置
- USART_InitStructure.USART_BaudRate = bound;//一般设置为9600;
- 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_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
- USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式
- USART_Init(USART1, &USART_InitStructure); //初始化串口
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启中断
- USART_ITConfig(USART1, USART_IT_TC , ENABLE);
-
- USART_Cmd(USART1, ENABLE); //使能串口
- memset( &HostTxRxData, 0, sizeof(HostTxRxData));
- //USART_ClearFlag( USART1, USART_IT_TC );
-
- }
我是这样配置的一样不行
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