【STM32WB09KE测评】用蓝牙广播时间并在手机上显示当前时间
#申请原创# 本文用一个简单的示例来体验蓝牙的广播功能，用STM32WB09KE使用内置的RTC时钟，通过蓝牙广播当前时间，并用手机连接后，显示当前时间。具体实现如下，先找到官方示例包，找到
通过修改些例程来实现。
打开工程，第一部就是添加RTC时钟初始化程序，把这两个文件添加进来
然后自已添加RTC.C和RTC.H,这两个文件
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file rtc.c
* @brief This file provides code for the configuration
* of the RTC instances.
******************************************************************************
* @attention
*
* Copyright (c) 2024 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 "rtc.h"
/* USER CODE BEGIN 0 */
/* USER CODE END 0 */
RTC_HandleTypeDef hrtc;
/* RTC init function */
void MX_RTC_Init(void)
{
/* USER CODE BEGIN RTC_Init 0 */
/* USER CODE END RTC_Init 0 */
RTC_TimeTypeDef sTime = {0};
RTC_DateTypeDef sDate = {0};
/* USER CODE BEGIN RTC_Init 1 */
/* USER CODE END RTC_Init 1 */
/** Initialize RTC Only
*/
hrtc.Instance = RTC;
hrtc.Init.HourFormat = RTC_HOURFORMAT_24;
hrtc.Init.AsynchPrediv = 127;
hrtc.Init.SynchPrediv = 255;
hrtc.Init.OutPut = RTC_OUTPUT_DISABLE;
hrtc.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
if (HAL_RTC_Init(&hrtc) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN Check_RTC_BKUP */
/* USER CODE END Check_RTC_BKUP */
/** Initialize RTC and set the Time and Date
*/
sTime.Hours = 12;
sTime.Minutes = 30;
sTime.Seconds = 50;
sTime.SubSeconds = 0;
sTime.DayLightSaving = RTC_DAYLIGHTSAVING_NONE;
sTime.StoreOperation = RTC_STOREOPERATION_RESET;
if (HAL_RTC_SetTime(&hrtc, &sTime, RTC_FORMAT_BIN) != HAL_OK)
{
Error_Handler();
}
sDate.WeekDay = RTC_WEEKDAY_THURSDAY;
sDate.Month = RTC_MONTH_OCTOBER;
sDate.Date = 30;
sDate.Year = 24;
if (HAL_RTC_SetDate(&hrtc, &sDate, RTC_FORMAT_BIN) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN RTC_Init 2 */
/* USER CODE END RTC_Init 2 */
}
void HAL_RTC_MspInit(RTC_HandleTypeDef* rtcHandle)
{
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = {0};
if(rtcHandle->Instance==RTC)
{
/* USER CODE BEGIN RTC_MspInit 0 */
/* USER CODE END RTC_MspInit 0 */
/** Initializes the peripherals clock
*/
PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_RTC_WDG_BLEWKUP;
PeriphClkInitStruct.RTCWDGBLEWKUPClockSelection = RCC_RTC_WDG_BLEWKUP_CLKSOURCE_LSE;
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
Error_Handler();
}
/* RTC clock enable */
__HAL_RCC_RTC_CLK_ENABLE();
/* USER CODE BEGIN RTC_MspInit 1 */
/* USER CODE END RTC_MspInit 1 */
}
}
void HAL_RTC_MspDeInit(RTC_HandleTypeDef* rtcHandle)
{
if(rtcHandle->Instance==RTC)
{
/* USER CODE BEGIN RTC_MspDeInit 0 */
/* USER CODE END RTC_MspDeInit 0 */
/* Peripheral clock disable */
__HAL_RCC_RTC_CLK_DISABLE();
/* USER CODE BEGIN RTC_MspDeInit 1 */
/* USER CODE END RTC_MspDeInit 1 */
}
}
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
再来添加rtc.h
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file rtc.h
* @brief This file contains all the function prototypes for
* the rtc.c file
******************************************************************************
* @attention
*
* Copyright (c) 2024 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 */
/* Define to prevent recursive inclusion -------------------------------------*/
#ifndef __RTC_H__
#define __RTC_H__
#ifdef __cplusplus
extern "C" {
#endif
/* Includes ------------------------------------------------------------------*/
#include "main.h"
/* USER CODE BEGIN Includes */
/* USER CODE END Includes */
extern RTC_HandleTypeDef hrtc;
/* USER CODE BEGIN Private defines */
/* USER CODE END Private defines */
void MX_RTC_Init(void);
/* USER CODE BEGIN Prototypes */
/* USER CODE END Prototypes */
#ifdef __cplusplus
}
#endif
#endif /* __RTC_H__ */
现在主函数中添加初始化函数
RTC_TimeTypeDef sTime;
RTC_DateTypeDef sDate;
int main(void)
{
/* USER CODE BEGIN 1 */
uint8_t hours = sTime.Hours;
uint8_t minutes = sTime.Minutes;
uint8_t seconds = sTime.Seconds;
uint8_t day = sDate.Date;
uint8_t month = sDate.Month;
uint8_t year = sDate.Year;
/* 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();
/* Configure the peripherals common clocks */
PeriphCommonClock_Config();
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_RADIO_Init();
MX_RADIO_TIMER_Init();
MX_PKA_Init();
/* USER CODE BEGIN 2 */
MX_RTC_Init();
/* USER CODE END 2 */
/* Init code for STM32_BLE */
MX_APPE_Init(NULL);
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
MX_APPE_Process();
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
}要发送广播，到app_ertry.c中修改
void MX_APPE_Process(void)
{
/* USER CODE BEGIN MX_APPE_Process_1 */
char time_str;
uint8_t i =0;
HAL_RTC_GetTime(&hrtc, &sTime, RTC_FORMAT_BIN);
HAL_RTC_GetDate(&hrtc, &sDate, RTC_FORMAT_BIN);
sprintf(time_str, "%02d:%02d:%02d", sTime.Hours, sTime.Minutes, sTime.Seconds);
UartRxCpltCallback((uint8_t *)time_str, strlen(time_str));
// printf("Time: %02d:%02d:%02d\n",sTime.Hours, sTime.Minutes, sTime.Seconds);
/* USER CODE END MX_APPE_Process_1 */
UTIL_SEQ_Run(UTIL_SEQ_DEFAULT);
/* USER CODE BEGIN MX_APPE_Process_2 */
/* USER CODE END MX_APPE_Process_2 */
}
最后还要修改UartRxCpltCallback函数，因为这个函数只实现了单个字符发送，
void UartRxCpltCallback(uint8_t * pdata, uint16_t size)
{
uint8_t byte_received;
if(size == 1)
{
byte_received = pdata;
if(buffUartRxIndex < sizeof(a_buffUartRx))
{
a_buffUartRx = byte_received;
}
else
{
buffUartRxIndex = 0;
}
if( (byte_received == '\n') || (buffUartRxIndex >= sizeof(a_buffUartRx)))
{
memcpy(&a_buffSpTx, &a_buffUartRx, buffUartRxIndex);
buffSpTxLen = buffUartRxIndex;
buffUartRxIndex = 0;
UTIL_SEQ_SetTask(1 << CFG_TASK_SERIALPORT_TX_REQ_ID, CFG_SEQ_PRIO_0);
}
}
else
{
for (uint16_t i = 0; i < size; i++)
{
byte_received = pdata;
if (buffUartRxIndex < sizeof(a_buffUartRx))
{
a_buffUartRx = byte_received;
}
else
{
buffUartRxIndex = 0; // 缓冲区溢出，重置索引
}
if ((byte_received == '\n') || (buffUartRxIndex >= sizeof(a_buffUartRx)))
{
memcpy(&a_buffSpTx, &a_buffUartRx, buffUartRxIndex);
buffSpTxLen = buffUartRxIndex;
buffUartRxIndex = 0;
UTIL_SEQ_SetTask(1 << CFG_TASK_SERIALPORT_TX_REQ_ID, CFG_SEQ_PRIO_0);
break; // 数据处理完成，退出循环
}
}
}
return;
}最后编译下载，打开手机连接开发板
这时就可以看到当前时间信息了。
蓝牙体验到此，喜欢的朋友不如自已动手实现一下，也可以把开发板上的其实数据广播出来，比如电压，温度等信息。
奈斯，看起来不错。广播的用法是不是不需要连接？ 蓝牙都是无线的
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