本帖最后由 龙鳞铁碎牙 于 2025-8-7 17:01 编辑
#申请原创# #技术资源# #申请开发板# 当使用STM32外接WIFI和蓝牙芯片时，绝大多数都是采用AT指令来进行通信测试的，这里我想借这个机会分享一个万能WIFI蓝牙AT指令测试工程，用它可以在通信早期尽快的测试WIFI和蓝牙芯片的通信功能，已检测连接有没有问题，硬件有没有故障。适合于任何使用串口进行AT指令通信的场合！！！采用循环队列加中断的方式实现，这里摒弃了DMA，因为有的MCU单片机没有DMA，所以直接使用中断加队列的方式来实现，方便移植到任何MCU上，甚至能支持最简单的MCS-51单片机。
整个原理就是把串口1 调试串口接收的AT指令发给ESP8266的数据串口5，然后把ESP8266的数据串口5收到的返回数据发给PC调试串口。
核心代码如下：
#include "esp8266.h"
uint8_t esp8266_buf[RXBUFFLENGTH];
uint16_t esp8266_cnt = 0;
uint16_t esp8266_cntPre = 0;
void WIFI_Send_Byte(uint8_t ch)
{
/* 发送一个字节数据到UART */
HAL_UART_Transmit(UART_ESP8266, (uint8_t *)&ch, 1, 0xFFFF);
}
void WIFI_Send_Bytes(uint8_t *data, uint32_t len)
{
/* 发送一个字节数据到UART */
HAL_UART_Transmit(UART_ESP8266, data, len, 0xFFFF);
}
void WIFI_Send_String_Length(uint8_t *str,uint32_t strlen)
{
unsigned int k=0;
do
{
WIFI_Send_Byte (*(str + k));
k++;
} while(k < strlen);
}
void WIFI_Send_String(uint8_t *str)
{
unsigned int k=0;
do
{
WIFI_Send_Byte (*(str + k));
k++;
} while(*(str + k)!='\0');
}
void ESP8266_Clear(void)
{
memset(esp8266_buf, 0, sizeof(esp8266_buf));
esp8266_cnt = 0;
}
uint8_t ESP8266_WaitRecive(void)
{
if(esp8266_cnt == 0) //如果接收计数为0 则说明没有处于接收数据中，所以直接跳出，结束函数
return REV_WAIT;
if(esp8266_cnt == esp8266_cntPre) //如果上一次的值和这次相同，则说明接收完毕
{
esp8266_cnt = 0; //清0接收计数
return REV_OK; //返回接收完成标志
}
esp8266_cntPre = esp8266_cnt; //置为相同
return REV_WAIT; //返回接收未完成标志
}
static uint8_t rx_data = 0;
void ESP8266_RxCallBack(void)
{
if(esp8266_cnt >= sizeof(esp8266_buf)) esp8266_cnt = 0; //防止串口被刷爆
esp8266_buf[esp8266_cnt++] = rx_data;
HAL_UART_Receive_IT(UART_ESP8266, &rx_data, 1);
}
#include "usart9.h"
uint8_t U1_RxBuff[RXBUFFLENGTH];
uint16_t U1_Rxlen = 0;
uint16_t U1_RxlencntPre = 0;
void uart9_Send_Byte(uint8_t ch)
{
/* 发送一个字节数据到UART */
HAL_UART_Transmit(UART_PC, (uint8_t *)&ch, 1, 0xFFFF);
}
void uart9_Send_Bytes(uint8_t *data, uint32_t len)
{
/* 发送一个字节数据到UART */
HAL_UART_Transmit(UART_PC, data, len, 0xFFFF);
}
void uart9_Send_String_Length(uint8_t *str,uint32_t strlen)
{
unsigned int k=0;
do
{
uart9_Send_Byte (*(str + k));
k++;
} while(k < strlen);
}
void uart9_Send_String(uint8_t *str)
{
unsigned int k=0;
do
{
uart9_Send_Byte (*(str + k));
k++;
} while(*(str + k)!='\0');
}
void user_uart_clear(void)
{
memset(U1_RxBuff, 0, sizeof(U1_RxBuff));
U1_Rxlen = 0;
}
uint8_t user_uart_wait_receive(void)
{
if(U1_Rxlen == 0) //如果接收计数为0 则说明没有处于接收数据中，所以直接跳出，结束函数
return REV_WAIT;
if(U1_Rxlen == U1_RxlencntPre) //如果上一次的值和这次相同，则说明接收完毕
{
U1_Rxlen = 0; //清0接收计数
return REV_OK; //返回接收完成标志
}
U1_RxlencntPre = U1_Rxlen; //置为相同
return REV_WAIT; //返回接收未完成标志
}
static uint8_t rx_data = 0;
void PC_RxCallBack(void)
{
if(U1_Rxlen >= sizeof(U1_RxBuff)) U1_Rxlen = 0; //防止串口被刷爆
U1_RxBuff[U1_Rxlen++] = rx_data;
HAL_UART_Receive_IT(UART_PC, &rx_data, 1);
}
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2025 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 "main.h"
#include "usart.h"
#include "gpio.h"
#include <stdio.h>
#include "usart9.h"
#include "esp8266.h"
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
/* USER CODE BEGIN PV */
void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
{
if (huart == UART_ESP8266) {
ESP8266_RxCallBack();
}
if (huart == UART_PC) {
PC_RxCallBack();
}
}
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
static uint8_t rx_data2 = 0;
static uint8_t rx_data1 = 0;
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_UART5_Init();
MX_USART1_UART_Init();
/* USER CODE BEGIN 2 */
HAL_UART_Receive_IT(UART_ESP8266, &rx_data1, 1);
HAL_UART_Receive_IT(UART_PC, &rx_data2, 1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
if(user_uart_wait_receive() == REV_OK)
{
WIFI_Send_String(U1_RxBuff);
user_uart_clear();
}
if(ESP8266_WaitRecive() == REV_OK)
{
uart9_Send_String(esp8266_buf);
ESP8266_Clear();
}
HAL_Delay(10);
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Enable Epod Booster
*/
if (HAL_RCCEx_EpodBoosterClkConfig(RCC_EPODBOOSTER_SOURCE_MSIS, RCC_EPODBOOSTER_DIV1) != HAL_OK)
{
Error_Handler();
}
if (HAL_PWREx_EnableEpodBooster() != HAL_OK)
{
Error_Handler();
}
/** Configure the main internal regulator output voltage
*/
if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
{
Error_Handler();
}
/** Set Flash latency before increasing MSIS
*/
__HAL_FLASH_SET_LATENCY(FLASH_LATENCY_2);
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSIS;
RCC_OscInitStruct.MSISState = RCC_MSI_ON;
RCC_OscInitStruct.MSISSource = RCC_MSI_RC0;
RCC_OscInitStruct.MSISDiv = RCC_MSI_DIV1;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
/** Initializes the CPU, AHB and APB buses clocks
*/
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_PCLK3;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSIS;
RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB3CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
Error_Handler();
}
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
编译烧录
打开串口助手
经过测试，这个万能WIFI蓝牙AT指令测试神器功能正确！！！
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