USART3进入不到接收中断

1万 · 2020-10-11 17:19

高手，求教一下。芯片stm32f103使用串口3进行收发数据，发送数据没有问题，但是始终接收不到数据，单步调试发现是没有进入串口的中断函数。

1万 · 2020-10-11 17:25

直接贴配置代码就行了，贴上来看看

2万 · 2020-10-11 17:28

都能发送，说明串口配置没问题；

1万 · 2020-10-11 17:33

中断部分配置不正常吧；

1万 · 2020-10-11 17:36

void USART3_Init(void)
{
GPIO_InitTypeDef GPIO_InitStructure;
USART_InitTypeDef USART_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

      /* config USART3 clock */
RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART3, ENABLE);

      /* USART3 GPIO config */
      /* Configure USART3 Tx (PB.10) as alternate function push-pull */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(GPIOB, &GPIO_InitStructure);
      /* Configure USART3 Rx (PB.11) as input floating */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_Init(GPIOB, &GPIO_InitStructure);

      /* USART3 mode config */
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;
USART_Init(USART3, &USART_InitStructure);
USART_Cmd(USART3, ENABLE);


USART_ClearFlag(USART3, USART_FLAG_TC);

USART_ITConfig(USART3, USART_IT_RXNE, ENABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
NVIC_InitStructure.NVIC_IRQChannel = USART3_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3;
NVIC_InitStructure.NVIC_IRQChannelSubPriority =3;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);

}

1万 · 2020-10-11 17:39

都配了啊，很纳闷

1万 · 2020-10-11 17:46

USART_Cmd(USART3, ENABLE); 把这句话放在 NVIC_Init(&NVIC_InitStructure); 这句话后面就行了

1万 · 2020-10-11 17:49

/* Enable GPIO clock */
  RCC_APB2PeriphClockCmd(USARTx_TX_GPIO_CLK | USARTx_RX_GPIO_CLK, ENABLE);
  /* Enable USART clock */
  RCC_APB1PeriphClockCmd(RCC_APB1Periph_UART4, ENABLE);
                                                                                                                                                                                                      //开启USART1的Clk,

  /* Configure USART Tx and Rx as alternate function push-pull */
  GPIO_InitStruct.GPIO_Pin = USARTx_TX_PIN;
  GPIO_InitStruct.GPIO_Speed = GPIO_Speed_2MHz;
  GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct);

  GPIO_InitStruct.GPIO_Pin = USARTx_RX_PIN;
      GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStruct);

      Uart2BaudInitial(38400);                                                                                                       //ZIGBEE模块默认波特率

      /* NVIC configuration */
  /* Enable the USARTx Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USARTx_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

      USART_ITConfig(UART4, USART_IT_RXNE, ENABLE);
      USART_Cmd(UART4,ENABLE);

这是我的串口4程序，F1的，芯片型号不一样，你用UART3一样的；

1万 · 2020-10-11 17:52

还有看下，接收引脚，有没有虚焊等

1万 · 2020-10-11 17:55

还是不行，单步调试时，PC端输入数据以后，就不知道跑到哪儿了。提示这个Fri Sep 22, 2017 08:56:45: Stopped by a vector catch ...

1万 · 2020-10-11 18:06

引脚检查了，没有问题

1万 · 2020-10-11 18:09

代码应该没有什么问题，贴上你的中断函数

1万 · 2020-10-11 18:12

没有启动文件？？？？？？？

1万 · 2020-10-11 18:16

UART_PutStr("SHURU\r\n");

  if(USART_GetITStatus(USART3, USART_IT_RXNE) != RESET)
  {
/* Read one byte from the receive data register */
RXBuffer[RXCounter++] = (USART_ReceiveData(USART3) & 0x7F);

/* Clear the USART1 Receive interrupt */
USART_ClearITPendingBit(USART3, USART_IT_RXNE);

if(RXCounter == 100)
{
   /* Disable the USART Receive interrupt */
   USART_ITConfig(USART3, USART_IT_RXNE, DISABLE);
}
}

1万 · 2020-10-11 18:20

添加了cortexm3_macro.s 还是不行

1万 · 2020-10-11 18:23

貌似有点道理

1万 · 2020-10-11 18:26

Fri Sep 22, 2017 09:43:08: Stopped by a vector catch ...
PC端一发数据，软件就提示这个，不知道跑到哪个位置了

1万 · 2020-10-11 18:34

应该中断接收没什么问题了，IAR的中断向量表好像不是你说的哪个文件，没用过IAR，刚才百度了下，你在网上下个STM32IAR的工程，把中断向量表文件拿过来用用

1万 · 2020-10-11 18:40

楼主tx和rx连接对了吗？

2万 · 2020-10-11 18:43

串口要共地。