STM32F103VC串口做输入打印到终端

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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：

/*uart.h code*/#ifndef  UART_H#define  UART_Hvoid 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

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

初始化串口要用到的GPIO口，这里是PA9,PA10

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

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

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

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

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

void USART1_IRQHandler(void){  uint8_t rx_data;  if(USART_GetITStatus(USART1, USART_IT_RXNE)==SET)  {    USART_ClearITPendingBit(USART1, USART_IT_RXNE);      rx_data=USART_ReceiveData(USART1);    USART_SendData(USART1, rx_data);    while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);  }}

最后在主函数main()中调用uart.h里面对外提供的调用函数，但前提是在RCC时钟时序都配置好情况下才可以执行。

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