172 lines
4.6 KiB
C
172 lines
4.6 KiB
C
/* USER CODE BEGIN Header */
|
||
/**
|
||
******************************************************************************
|
||
* @file usart.c
|
||
* @brief This file provides code for the configuration
|
||
* of the USART instances.
|
||
******************************************************************************
|
||
* @attention
|
||
*
|
||
* Copyright (c) 2026 STMicroelectronics.
|
||
* All rights reserved.
|
||
*
|
||
* This software is licensed under terms that can be found in the LICENSE file
|
||
* in the root directory of this software component.
|
||
* If no LICENSE file comes with this software, it is provided AS-IS.
|
||
*
|
||
******************************************************************************
|
||
*/
|
||
/* USER CODE END Header */
|
||
/* Includes ------------------------------------------------------------------*/
|
||
#include "usart.h"
|
||
|
||
/* USER CODE BEGIN 0 */
|
||
|
||
/* USER CODE END 0 */
|
||
|
||
UART_HandleTypeDef huart1;
|
||
|
||
/* USART1 init function */
|
||
|
||
void MX_USART1_UART_Init(void)
|
||
{
|
||
|
||
/* USER CODE BEGIN USART1_Init 0 */
|
||
|
||
/* USER CODE END USART1_Init 0 */
|
||
|
||
/* USER CODE BEGIN USART1_Init 1 */
|
||
|
||
/* USER CODE END USART1_Init 1 */
|
||
huart1.Instance = USART1;
|
||
huart1.Init.BaudRate = 115200;
|
||
huart1.Init.WordLength = UART_WORDLENGTH_8B;
|
||
huart1.Init.StopBits = UART_STOPBITS_1;
|
||
huart1.Init.Parity = UART_PARITY_NONE;
|
||
huart1.Init.Mode = UART_MODE_TX_RX;
|
||
huart1.Init.HwFlowCtl = UART_HWCONTROL_NONE;
|
||
huart1.Init.OverSampling = UART_OVERSAMPLING_16;
|
||
if (HAL_UART_Init(&huart1) != HAL_OK)
|
||
{
|
||
Error_Handler();
|
||
}
|
||
/* USER CODE BEGIN USART1_Init 2 */
|
||
|
||
/* USER CODE END USART1_Init 2 */
|
||
|
||
}
|
||
|
||
void HAL_UART_MspInit(UART_HandleTypeDef* uartHandle)
|
||
{
|
||
|
||
GPIO_InitTypeDef GPIO_InitStruct = {0};
|
||
if(uartHandle->Instance==USART1)
|
||
{
|
||
/* USER CODE BEGIN USART1_MspInit 0 */
|
||
|
||
/* USER CODE END USART1_MspInit 0 */
|
||
/* USART1 clock enable */
|
||
__HAL_RCC_USART1_CLK_ENABLE();
|
||
|
||
__HAL_RCC_GPIOA_CLK_ENABLE();
|
||
/**USART1 GPIO Configuration
|
||
PA9 ------> USART1_TX
|
||
PA10 ------> USART1_RX
|
||
*/
|
||
GPIO_InitStruct.Pin = GPIO_PIN_9;
|
||
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
|
||
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
|
||
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
|
||
|
||
GPIO_InitStruct.Pin = GPIO_PIN_10;
|
||
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
|
||
GPIO_InitStruct.Pull = GPIO_NOPULL;
|
||
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
|
||
|
||
/* USER CODE BEGIN USART1_MspInit 1 */
|
||
|
||
/* USER CODE END USART1_MspInit 1 */
|
||
}
|
||
}
|
||
|
||
void HAL_UART_MspDeInit(UART_HandleTypeDef* uartHandle)
|
||
{
|
||
|
||
if(uartHandle->Instance==USART1)
|
||
{
|
||
/* USER CODE BEGIN USART1_MspDeInit 0 */
|
||
|
||
/* USER CODE END USART1_MspDeInit 0 */
|
||
/* Peripheral clock disable */
|
||
__HAL_RCC_USART1_CLK_DISABLE();
|
||
|
||
/**USART1 GPIO Configuration
|
||
PA9 ------> USART1_TX
|
||
PA10 ------> USART1_RX
|
||
*/
|
||
HAL_GPIO_DeInit(GPIOA, GPIO_PIN_9|GPIO_PIN_10);
|
||
|
||
/* USER CODE BEGIN USART1_MspDeInit 1 */
|
||
|
||
/* USER CODE END USART1_MspDeInit 1 */
|
||
}
|
||
}
|
||
|
||
/* USER CODE BEGIN 1 */
|
||
|
||
/* 引入标准输入输出头文件，包含fputc函数原型和FILE类型定义 */
|
||
#include <stdio.h>
|
||
|
||
/* 禁用半主机模式
|
||
* 不勾选MicroLIB时，标准库默认使用半主机(Semihosting)实现printf。
|
||
* 半主机需要调试器支持，脱机运行时会导致程序卡死。
|
||
* __use_no_semihosting 让链接器不链接半主机相关函数，
|
||
* 同时我们必须提供_sys_exit等替代函数。
|
||
*/
|
||
#pragma import(__use_no_semihosting)
|
||
|
||
/* 标准库要求提供 __FILE 结构体定义和 __stdout 实例 */
|
||
struct __FILE {
|
||
int handle;
|
||
};
|
||
FILE __stdout;
|
||
|
||
/* 退出函数 — 标准库在用完 _sys_exit 后调用，此处空实现 */
|
||
void _sys_exit(int return_code)
|
||
{
|
||
(void)return_code;
|
||
while (1);
|
||
}
|
||
|
||
/* 写字符 — 底层 tty 输出钩子，供某些 stdio 函数调用 */
|
||
void _ttywrch(int ch)
|
||
{
|
||
HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
|
||
}
|
||
|
||
/**
|
||
* @brief 重定向fputc函数，将printf输出重定向到串口1
|
||
* @param ch: 要发送的字符
|
||
* @param f: 文件指针（本实现中未使用）
|
||
* @retval 发送成功的字符
|
||
*/
|
||
int fputc(int ch, FILE *f)
|
||
{
|
||
/* 消除未使用参数f的编译警告 */
|
||
(void)f;
|
||
|
||
/* 调用HAL库串口发送函数，发送单个字符 */
|
||
/* 参数说明：
|
||
&huart1: 串口1的句柄（若使用其他串口，改为对应的句柄，如&huart2）
|
||
(uint8_t *)&ch: 要发送的数据缓冲区地址
|
||
1: 发送数据的长度（单个字符）
|
||
HAL_MAX_DELAY: 超时时间（无限等待，确保发送成功）
|
||
*/
|
||
HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, HAL_MAX_DELAY);
|
||
|
||
/* 返回发送的字符，符合fputc函数的返回值要求 */
|
||
return ch;
|
||
}
|
||
/* USER CODE END 1 */
|
||
|