串口2收送不了数据，求大神帮忙看看

bboy110 · 发表于 2017-11-19 13:15:03

//串口2中断服务函数
void USART2_IRQHandler(void)
{
u8 res;
if(USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)//接收到数据
{
res =USART_ReceiveData(USART2);
gizPutData(&res, 1);//数据写入到缓冲区
}
}

//初始化IO 串口2
//pclk1

CLK1时钟频率(Mhz)
//bound:波特率
void usart2_init(u32 bound)
{

NVIC_InitTypeDef NVIC_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);                         //GPIOB时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2,ENABLE);                         //串口3时钟使能

USART_DeInit(USART2);  //复位串口2
//USART2_TX PA2
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;                                  //PB10
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PB10

//USART2_RX    PA3
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;                         //浮空输入
GPIO_Init(GPIOA, &GPIO_InitStructure);                                        //初始化PB11

USART_InitStructure.USART_BaudRate = bound;                                  //波特率一般设置为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(USART2, &USART_InitStructure);    //初始化串口3

USART_Cmd(USART2, ENABLE);                   //使能串口

//使能接收中断
USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);  //开启中断

//设置中断优先级
NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=2 ;//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

}