c - stm32f103c8t6 USART1中断不起作用

美好的一天。
我正在尝试从Stm32 std库运行UART示例脚本，但似乎不起作用。
我正在使用这样的板：

通过USART1上传固件。
USART初始化代码：

#include <stm32f10x.h>
#include <misc.h>

volatile char received_string[MAX_STRLEN+1];

void Delay(__IO uint32_t nCount) {
  while(nCount--) {
  }
}

void init_USART1(uint32_t baudrate){

   GPIO_InitTypeDef GPIO_InitStruct;
   USART_InitTypeDef USART_InitStruct;
   NVIC_InitTypeDef NVIC_InitStructure;

   RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
   RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);


   GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9;
   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF_PP;
   GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
   GPIO_Init(GPIOA, &GPIO_InitStruct);

   GPIO_InitStruct.GPIO_Pin = GPIO_Pin_10;
   GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN_FLOATING;
   GPIO_Init(GPIOA, &GPIO_InitStruct);

   USART_InitStruct.USART_BaudRate = baudrate;
   USART_InitStruct.USART_WordLength = USART_WordLength_8b;
   USART_InitStruct.USART_StopBits = USART_StopBits_1;
   USART_InitStruct.USART_Parity = USART_Parity_No;
   USART_InitStruct.USART_HardwareFlowControl =    USART_HardwareFlowControl_None;
   USART_InitStruct.USART_Mode = USART_Mode_Tx | USART_Mode_Rx;
   USART_Init(USART1, &USART_InitStruct);

   USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);


   NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);

   USART_Cmd(USART1, ENABLE);
}

void USART_puts(USART_TypeDef* USARTx, volatile char *s){

   while(*s){
      while( !(USARTx->SR & 0x00000040) );
      USART_SendData(USARTx, *s);
      *s++;
   }
}

int main(void) {

  init_USART1(9600); // initialize USART1 @ 9600 baud

  USART_puts(USART1, "Init complete! Hello World!\r\n"); // just send a message to indicate that it works

   while (1){
     /*
      * You can do whatever you want in here
      */
   }
}

void USART1_IRQHandler(void){

    // check if the USART1 receive interrupt flag was set
    if( USART_GetITStatus(USART1, USART_IT_RXNE) ){

        static uint8_t cnt = 0; // this counter is used to determine the string length
        char t = USART1->DR; // the character from the USART1 data register is saved in t

        // check if the received character is not the LF character (used to determine end of string)
        // or the if the maximum string length has been been reached
        if( (t != '\n') && (cnt < MAX_STRLEN) ){
            received_string[cnt] = t;
            cnt++;
        }
         else{ // otherwise reset the character counter and print the received string
           cnt = 0;
           USART_puts(USART1, received_string);
        }
    }
}

在未启用NVIC的情况下，USART1端口正在工作。

最佳答案

您可以尝试将USART_puts（）函数更改为：

void USART_puts(USART_TypeDef* USARTx, volatile char *s){
    while(*s)
    {
      while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);// Wait the set of TXE
      USART_SendData(USART1, *(s++));
      while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);// Wait the end of transmit
    }
}

关于c - stm32f103c8t6 USART1中断不起作用，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43541797/