USART2配置问题

asdbhk

GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
 
  RCC_APB2PeriphClockCmd(RCC_APB1Periph_USART2|RCC_APB2Periph_GPIOA,ENABLE);

  /* Configure USART2 Tx (PA.02) as alternate function push-pull */
  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);

  /* Configure USART2 Rx (PA.03) as input floating */
  GPIO_InitStructure.GPIO_Pin=GPIO_Pin_3;
  GPIO_InitStructure.GPIO_Mode=GPIO_Mode_IN_FLOATING;
  GPIO_Init(GPIOA, &GPIO_InitStructure);


  

/* USART1 configuration ------------------------------------------------------*/
  // USART1 configured as follow:

  USART_InitStructure.USART_BaudRate=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;

  /* Configure the USART2 */
  USART_Init(USART2, &USART_InitStructure);

  /* Enable the USART Transmoit interrupt: this interrupt is generated when the
     USART1 transmit data register is empty */ 
  //USART_ITConfig(USART2, USART_IT_TXE, ENABLE);

  /* Enable the USART Receive interrupt: this interrupt is generated when the
     USART1 receive data register is not empty */
  USART_ITConfig(USART2, USART_IT_RXNE, ENABLE);

  /* Enable USART2 */
  USART_Cmd(USART2, ENABLE);
呼叫原子哥
配置有问题么 这样配置后发送数据时发送中断没有触发

正点原子

我不用库的...
关于usart2的配置,本论坛有人提过了,搜索下答案吧.

Pony279

NVIC里 的中断使能呢?

magicoctoy

回复【楼主位】asdbhk:
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楼主 你的发送中断配置都封掉了，怎么会产生 发送中断？
//USART_ITConfig(USART2, USART_IT_TXE, ENABLE);

5498折戟沉沙

其实原子的串口1的也是没有的，只不过这个研究过之后就能一眼看出来了，如果只是超程序，我表示无语……

asdbhk

回复【6楼】syhx8262516:

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RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2, ENABLE);
调用这个也没给力，怎么回事呢

asdbhk

回复【3楼】Pony279:
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/* Enable the USART2 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

这个对么

asdbhk

回复【4楼】magicoctoy:

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为什么打开USART_ITConfig(USART2, USART_IT_TXE, ENABLE); 
串口1就接受不到数据呢 是中断优先级的事么

asdbhk

回复【2楼】正点原子:

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初学 还不怎么懂位操作 找时间好好看一下

jy11

可以参考.