STM32CubeMX(3)——HAL库串口通信

﹏ヽ暗。殇╰゛Y 2022-10-30 12:27 346阅读 0赞

# 1. cubeMX配置 #

CubeMX配置生成代码参考 ：[https://blog.csdn.net/as480133937/article/details/99073783][https_blog.csdn.net_as480133937_article_details_99073783]

cubeMX配置过程的注意事项请参考：[https://liu-endong.blog.csdn.net/article/details/113585500][https_liu-endong.blog.csdn.net_article_details_113585500]

# 2. 中断 #

HAL的串口中断不像库函数配置需要自己引用中断向量，他是直接使用启动文件的向量表里面的中断表。

![20210219163029151.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 1][]

然后在中断文件里面实现中断函数，cubeMX生成的非系统中断函数一般都在最后面添加

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 2][]

找到接收、发送中断，接收中断在中断函数最后几行

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 3][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 4][]

# 3. 重定义fputc #

在hal.c中定义

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 5][]

#include <stdio.h>
    extern UART_HandleTypeDef huart1;   //声明串口

重定义pfutc

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 6][]

int fputc(int ch, FILE *f)
    {
      HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xffff);
      return ch;
    }
     
    int fgetc(FILE *f)
    {
      uint8_t ch = 0;
      HAL_UART_Receive(&huart1, &ch, 1, 0xffff);
      return ch;
    }

# 4. main.c中调用 #

添加数据缓冲

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 7][]

#define RXBUFFERSIZE 256
    char RxBuffer[RXBUFFERSIZE];

调用fputc

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1Njk3OTc4_size_16_color_FFFFFF_t_70 8][]

printf("666led666\n");
    		HAL_Delay(1000);

# 5. 总结 #

以上代码是连续发送，不能一次发送一行，而是1s发送一次，

[https_blog.csdn.net_as480133937_article_details_99073783]: https://blog.csdn.net/as480133937/article/details/99073783
[https_liu-endong.blog.csdn.net_article_details_113585500]: https://liu-endong.blog.csdn.net/article/details/113585500
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