- void uart_init(u32 bound) {
- //GPIO端口设置
- GPIO_InitTypeDef GPIO_InitStructure;
- USART_InitTypeDef USART_InitStructure;
- NVIC_InitTypeDef NVIC_InitStructure;
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 | RCC_APB2Periph_GPIOA, ENABLE); //使能USART1,GPIOA时钟
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO, ENABLE);
- GPIO_PinRemapConfig(GPIO_Remap_USART1, ENABLE);
- // //USART1_TX GPIOA.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GPIOA.9
- //
- // //USART1_RX GPIOA.10初始化
- // GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
- // GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
- // GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10
- /* TX PB6 */
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- /* RX PB7 */
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- //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;//串口波特率
- 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_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1
- USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//开启串口接受中断
- USART_Cmd(USART1, ENABLE); //使能串口1
- }
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