// UART初始化 void uart4_init(u32 bound) { //GPIO端口设置 GPIO_InitTypeDef GPIO_InitStructure; USART_InitTypeDef USART_InitStructure; NVIC_InitTypeDef NVIC_InitStructure; RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC, ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE); //UART4_TX GPIOC10 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10; //PC10 GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz; GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP; //复用推挽输出 GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIOC10 //UART4_RX GPIOC11初始化 GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;//PC11 GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入 GPIO_Init(GPIOC, &GPIO_InitStructure);//初始化GPIOC11 //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(UART4, &USART_InitStructure); //初始化串口1 USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);//开启串口接受中断 USART_Cmd(UART4, ENABLE); //使能串口1 //USART NVIC 配置 NVIC_InitStructure.NVIC_IRQChannel = UART4_IRQn; NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1 ; NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1; 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 }
这个是我的初始化部分,发送数据进不去串口中断,串口发送数据后,串口4状态寄存器从C0变为F8再变会C0,表明收到数据后又不知道为什么被清零了
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