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標(biāo)題: HC-06模塊與STM32單片機(jī)通訊問(wèn)題 [打印本頁(yè)]

作者: 6464646~ 時(shí)間: 2022-5-23 04:26
標(biāo)題: HC-06模塊與STM32單片機(jī)通訊問(wèn)題
這里是串口配置以及中斷服務(wù)函數(shù)，我覺(jué)得沒(méi)問(wèn)題。為什么實(shí)現(xiàn)不了通訊的目的，而且波特率都設(shè)置一樣了，它就是不能接收和發(fā)送數(shù)據(jù)，能不能有人解決一下？
u8 res;
void uart_init(u32 bound)
{
  //GPIO端口設(shè)置
  GPIO_InitTypeDef GPIO_InitStructure;
  USART_InitTypeDef USART_InitStructure;
  NVIC_InitTypeDef NVIC_InitStructure;
  RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1|RCC_APB2Periph_GPIOA, ENABLE);       //使能USART1，GPIOA時(shí)鐘

  //USART1_TX GPIOA.9
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9; //PA.9
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;       //復(fù)用推挽輸出
  GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.9

  //USART1_RX       GPIOA.10初始化
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;//PA10
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;//浮空輸入
  GPIO_Init(GPIOA, &GPIO_InitStructure);//初始化GPIOA.10

  //Usart1 NVIC 配置
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=3 ;//搶占優(yōu)先級(jí)3
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;             //子優(yōu)先級(jí)3
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;                      //IRQ通道使能
  NVIC_Init(&NVIC_InitStructure);       //根據(jù)指定的參數(shù)初始化VIC寄存器

  //USART 初始化設(shè)置
  USART_InitStructure.USART_BaudRate = 115200;//串口波特率
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;//字長(zhǎng)為8位數(shù)據(jù)格式
  USART_InitStructure.USART_StopBits = USART_StopBits_1;//一個(gè)停止位
  USART_InitStructure.USART_Parity = USART_Parity_No;//無(wú)奇偶校驗(yàn)位
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;//無(wú)硬件數(shù)據(jù)流控制
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;       //收發(fā)模式
  USART_Init(USART1, &USART_InitStructure); //初始化串口1
  USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);//開(kāi)啟串口接受中斷
  USART_Cmd(USART1, ENABLE);                   //使能串口1

}

void USART1_IRQHandler(void)    //串口接收中斷，并將接收到得數(shù)據(jù)發(fā)送出
{
u8 res;
if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)//判斷是否接收中斷
  {
   res = USART_ReceiveData(USART1);
      if (res=='1') g_usart_flash=1;
      if (res=='2') g_usart_flash=0;
   USART_SendData(USART1,res);
   while(USART_GetFlagStatus(USART1,USART_FLAG_TXE) == RESET);//判斷發(fā)送標(biāo)志
  }
}

作者: luo_zz 時(shí)間: 2022-5-23 14:14
NVIC的配置不全：
   NVIC_InitTypeDef NVIC_InitStructure;
/* Set the Vector Table base location at 0x08000000 */
NVIC_SetVectorTable(NVIC_VectTab_FLASH, 0x0);
/* Configure the NVIC Preemption Priority Bits */
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

/* Enable the USART1 Interrupt */
NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;    //通道設(shè)置為串口1中斷
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;    //中斷響應(yīng)優(yōu)先級(jí)0
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    //打開(kāi)中斷
NVIC_Init(&NVIC_InitStructure);    //初始化

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