stm32串口USART2通信问题

milanacgd

u8 USART1_RX_BUF[64];    

u8 USART2_RX_BUF[64]; 

u8 USART1_RX_STA=0;      

u8 USART2_RX_STA=0;

void uart_init(u32 bound){

    GPIO_InitTypeDef GPIO_InitStructure;

USART_InitTypeDef USART_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;

RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA|RCC_APB2Periph_AFIO, ENABLE);

RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);

     //USART2_TX   PA.2

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;

        GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

        GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

        GPIO_Init(GPIOA, &GPIO_InitStructure);

     //USART2_RX   PA.3

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

    GPIO_Init(GPIOA, &GPIO_InitStructure);     

//USART1_TX   PA.9

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;

    GPIO_Init(GPIOA, &GPIO_InitStructure); 

    //USART1_RX  A.10

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;

    GPIO_Init(GPIOA, &GPIO_InitStructure);  

   //Usart1 NVIC ????

NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??????

NVIC_Init(&NVIC_InitStructure); //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷USART1

//Usart2 NVIC?è??

NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3; //

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQ?¨??????

NVIC_Init(&NVIC_InitStructure); //?ù??NVIC_InitStruct?????¨???????????????èNVIC?????÷USART2

   //USART ???????è??

 

USART_InitStructure.USART_BaudRate = bound;//??°??è????9600;

USART_InitStructure.USART_WordLength = USART_WordLength_8b;

USART_InitStructure.USART_StopBits = USART_StopBits_1;

USART_InitStructure.USART_Parity = USART_Parity_No;

USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

    USART_Init(USART1, &USART_InitStructure);

    USART_Init(USART2, &USART_InitStructure);

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//????????

    USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);//????????

    USART_Cmd(USART1, ENABLE);                    //???????? 

USART_Cmd(USART2, ENABLE);                    //????????

}

呃，注释复制出来就乱码了，我根据原子哥的代码，然后查阅了STM32库函数的文件，模仿写了一个USART2通信的程序，如上，然后，发现，USART1接板子连电脑串口通信正常，USART2接板子连电脑通信就发不出东西，这是设置哪里出错了吗，请指教

正点原子

论坛搜索串口2,参考下别人的代码.

milanacgd

回复【2楼】正点原子:
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因为我用的MDK4.X，论坛搜索到的跟我在百度网盘下载的代码不是一个版本的
你后来改的串口设置里面是用库函数，原来的代码更多使用寄存器操作
现在两个代码版本不一样，蛋疼