在做温湿度传感器实验的时候,通过串口通信来控制继电器的的开关,发送过去继电器没有反应,不知道怎么解决,有没有兄弟知道的,感谢
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file usart.c
* @brief This file provides code for the configuration
* of the USART instances.
******************************************************************************
* @attention
*
* Copyright (c) 2023 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 */
#include "stdio.h"
#include "string.h"
//串口接收缓存(1字节)
uint8_t buf=0;
//定义最大接收字节数 200,可根据需求调整
#define UART1_REC_LEN 200
// 接收缓冲, 串口接收到的数据放在这个数组里,最大UART1_REC_LEN个字节
uint8_t UART1_RX_Buffer[UART1_REC_LEN];
// 接收状态
// bit15, 接收完成标志
// bit14, 接收到0x0d
// bit13~0, 接收到的有效字节数目
uint16_t UART1_RX_STA=0;
#define SIZE 12
char buffer[SIZE];
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
// 判断中断是由哪个串口触发的
if(huart->Instance == USART1)
{
// 判断接收是否完成(UART1_RX_STA bit15 位是否为1)
if((UART1_RX_STA & 0x8000) == 0)
{
// 如果已经收到了 0x0d (回车),
if(UART1_RX_STA & 0x4000)
{
// 则接着判断是否收到 0x0a (换行)
if(buf == 0x0a)
{
printf("Received: %c n", buf);
// 如果 0x0a 和 0x0d 都收到,则将 bit15 位置为1
UART1_RX_STA |= 0x8000;
// 灯控指令
if(!strstr(UART1_RX_Buffer,"L-0"))
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_RESET);
if(!strstr(UART1_RX_Buffer,"L-1"))
HAL_GPIO_WritePin(GPIOB, GPIO_PIN_6, GPIO_PIN_SET);
memset(UART1_RX_Buffer, 0, UART1_REC_LEN);
UART1_RX_STA = 0;
}
else
// 否则认为接收错误,重新开始
UART1_RX_STA = 0;
}
else // 如果没有收到了 0x0d (回车)
{
//则先判断收到的这个字符是否是 0x0d (回车)
if(buf == 0x0d)
{
// 是的话则将 bit14 位置为1
UART1_RX_STA |= 0x4000;
}
else
{
// 否则将接收到的数据保存在缓存数组里
UART1_RX_Buffer[UART1_RX_STA & 0X3FFF] = buf;
UART1_RX_STA++;
// 如果接收数据大于UART1_REC_LEN(200字节),则重新开始接收
if(UART1_RX_STA > UART1_REC_LEN - 1)
UART1_RX_STA = 0;
}
}
}
// 重新开启中断
HAL_UART_Receive_IT(&huart1, &buf, 1);
}
}
int fputc(int ch, FILE *f)
{
unsigned char temp[1]={ch};
HAL_UART_Transmit(&huart1,temp,1,0xffff);
return ch;
}
/* 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);
/* USART1 interrupt Init */
HAL_NVIC_SetPriority(USART1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(USART1_IRQn);
/* 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);
/* USART1 interrupt Deinit */
HAL_NVIC_DisableIRQ(USART1_IRQn);
/* USER CODE BEGIN USART1_MspDeInit 1 */
/* USER CODE END USART1_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
![img](https://img-mid.csdnimg.cn/release/static/image/mid/ask/981430520996191.png "#left")