stm32f10串口发送失败求助

zhu2006 · 发表于 2014-9-19 21:23:32

我调试stm32f107的串口（103的串口程序移植过来的，引脚一样的）  下面的程序但是发送数据失败！仿真单步执行发现库函数  USART_SendData（）中有两语句没执行被直接跳过去了，串口能正确接收从PC端的数据   没找到发送失败的问题所在！   请大侠指点一下   谢谢
USART_SendData(COM4,0xaa);
void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)
{
  /* Check the parameters */
  assert_param(IS_USART_ALL_PERIPH(USARTx));
  assert_param(IS_USART_DATA(Data));

  /* Transmit Data */
  USARTx->DR = (Data & (uint16_t)0x01FF);
}
void USART_SendData(USART_TypeDef* USARTx, uint16_t Data)中的assert_param(IS_USART_ALL_PERIPH(USARTx));
assert_param(IS_USART_DATA(Data)); 被跳过去没有执行导致串口发送失败！

muniao · 发表于 2014-9-19 21:33:13

发USART初始化出来看看

zhu2006 · 发表于 2014-9-19 21:53:50

回复【2楼】muniao:
---------------------------------
void USART1_Init(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;

  RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE);

  RCC_APB1PeriphClockCmd( RCC_APB1Periph_UART4, ENABLE);/*Only USART1, no need to remap*/

  /* Configure the NVIC

reemption

riority Bits */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
  /* Enable the USART4 Interrupt */
  NVIC_InitStructure.NVIC_IRQChannel = USART4_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);

  /*Configure Of USART*/
  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 USART Tx as alternate function push-pull */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
  GPIO_InitStructure.GPIO_Pin =  GPIO_Pin_10;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* Configure USART Rx as input floating */
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_11;
  GPIO_Init(GPIOC, &GPIO_InitStructure);

  /* USART configuration */
  USART_Init(USART4, &USART_InitStructure);

  /* Enable USART */
  USART_Cmd(USART4, ENABLE);


//闲时处于收数状态

  USART_ITConfig(USART4, USART_IT_RXNE, ENABLE);

}