原子哥，各位大神，求解串口2复用功能问题

njf123

最近用串口2的PD.5和PD6复用到PA2和PA3时不懂弄了，他说GPIO_PinRemapConfig(GPIO_PartialRemap_USART2, ENABLE);这个语句出错，是没加头文件还是要定义么？


void uart_init(u32 bound)
{
    //GPIO端口设置
    GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure,USART2_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;
 
RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE); //使能USART1，GPIOA时钟
  USART_DeInit(USART1);  //复位串口1
    RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE); 
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOD,ENABLE);
RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO,ENABLE);
    GPIO_PinRemapConfig(GPIO_PartialRemap_USART2, ENABLE);
  USART_DeInit(USART2);  //复位串口1
//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  A.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

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5; //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(GPIOD, &GPIO_InitStructure); //初始化PA9
   
    //USART1_RX  A.10
    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空输入
    GPIO_Init(GPIOD, &GPIO_InitStructure);  //初始化PA10


   //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


USART2_InitStructure.USART_BaudRate = bound;//一般设置为9600;
USART2_InitStructure.USART_WordLength = USART_WordLength_8b;//字长为8位数据格式
USART2_InitStructure.USART_StopBits = USART_StopBits_1;//一个停止位
USART2_InitStructure.USART_Parity = USART_Parity_No;//无奇偶校验位
USART2_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//无硬件数据流控制
USART2_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx; //收发模式

    USART_Init(USART2, &USART2_InitStructure); //初始化串口

    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 

#if EN_USART2_RX  //如果使能了接收  
   //Usart1 NVIC 配置
    NVIC_InitStructure.NVIC_IRQChannel = USART2_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(USART2, USART_IT_RXNE, ENABLE);//开启中断
#endif
    USART_Cmd(USART2, ENABLE);  

正点原子

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