STM32F103VC串口做输入打印到终端


STM32F103VC下将串口作为输入打印到终端

  • 定义两个文件，一个是uart.c 一个是uart.h

  • uart.h的代码：

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/*uart.h code*/

#ifndef  UART_H
#define  UART_H

void uart1_init(void);

#endif

对外调用的初始化函数进行声明。

  • uat.c的代码：

要包含的头文件

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#include "stm32f10x.h"
#include "stdio.h"
#include "uarth"

初始化串口要用到的GPIO口，这里是PA9,PA10

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int uart_gpio_init(){
    GPIO_InitTypeDef UART_GPIO_InitStructure;
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA, ENABLE);
    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);
    GPIO_StructInit(&UART_GPIO_InitStructure);
    UART_GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;
    UART_GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    UART_GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;  
    GPIO_Init(GPIOA, &UART_GPIO_InitStructure);
    UART_GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;
    UART_GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
    GPIO_Init(GPIOA, &UART_GPIO_InitStructure);
    return 0;
}

配置串口的波特率，校验位等等属性

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int uart_config(){
    USART_InitTypeDef USART_InitStructure;
    USART_StructInit(&USART_InitStructure);  
    USART_InitStructure.USART_BaudRate =115200;
    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(USART1, &USART_InitStructure);
    USART_Cmd(USART1, ENABLE);
    return 0;
}

配置串口所用到中断向量表

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void nvic_uart_config(void)
{
   NVIC_InitTypeDef NVIC_InitStructure;
   /* Enable the USART1 Interrupt */
   NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;
   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
   NVIC_Init(&NVIC_InitStructure);
}

写一个外部调用的串口初始化函数

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void uart1_init(void)
{
      uart_gpio_init();
      uart_config();
      nvic_uart_config();
      USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
}

将printf输出进行编写为该串口

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int fputc(int ch, FILE * f){
    USART_SendData(USART1, (uint8_t)ch);
    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET );
    return ch;
}

在stm32f10x_it.c 文件中定义串口中断采用中断接收，接收到之后采用轮询的方式发送

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void USART1_IRQHndler(void){