给android设备增加串口功能

给android设备增加串口功能

本文博客链接:http://blog.csdn.net/jdh99,作者:jdh,转载请注明.

环境：

主机:WIN7

开发环境:MDK4.23

功能:

打开Android手机或者平台的蓝牙,通过蓝牙连接蓝牙转串口板,通过蓝牙转串口板的串口与需要调试的串口设备相连

说明：

1.PCB为我同学hunter绘制,他同时是stm32的高手,感谢他提供的支持.

2.制作了一个蓝牙转串口的板子,Android设备连接上这个板子,就相当于增加了一个串口.

3.单片机选用的是STM32F101C8,蓝牙模块选用的是HC05.HC05本身就是一个蓝牙转串口模块,再增加一个单片机的作用是可以通过单片机来配置波特率等参数.

4.蓝牙转串口板可以用MINI USB来供电,或者用3.7V锂电池来供电,板子上带有充电管理芯片,由于没锂电池,充电这块还没有测试.

5.上位机程序(Android上的串口助手)暂时没有时间写,可以在安卓市场上搜索"蓝牙串口"下一个串口助手.

6.在上位机发送指定格式可以配置波特率,例:AT+BAUD9600END

实物图:

电路图:

第1部分:

图片较大,部分没有显示.可以在新窗口打开图片来看到全部内容

第2部分:

下位机程序:

public.h

#ifndef _PUBLIC_H_#define _PUBLIC_H_//公共头文件#include "main.h"#include "string.h"#include "stdlib.h"#include "stm32f10x_tim.h"//宏定义#define U8 unsigned char#define U16 unsigned short#define U32 unsigned long//蓝牙转串口的缓存长度#define LEN_BT_STACK 10//蓝牙波特率设置命令#define BT_BAUD_4800"AT+UART=4800,0,0"#define BT_BAUD_9600   "AT+UART=9600,0,0"#define BT_BAUD_19200"AT+UART=19200,0,0"#define BT_BAUD_38400"AT+UART=38400,0,0"#define BT_BAUD_57600"AT+UART=57600,0,0"#define BT_BAUD_115200"AT+UART=115200,0,0"#define DEFAULT_BAUD9600//定义flash页大小#if defined (STM32F10X_HD) || defined (STM32F10X_HD_VL) || (STM32F10X_CL) || defined (STM32F10X_XL)  #define FLASH_PAGE_SIZE    ((uint16_t)0x800)  #define FLASH_PAGES_TO_BE_PROTECTED (FLASH_WRProt_Pages12to13 | FLASH_WRProt_Pages14to15)  #else  #define FLASH_PAGE_SIZE    ((uint16_t)0x400)  //需要关闭写保护的页面  #define FLASH_PAGES_TO_BE_PROTECTED (FLASH_WRProt_Pages60to63)  #endif//定义操作的flash的始末地址63K-64K#define BANK1_WRITE_START_ADDR  ((uint32_t)0x0800FC00)#define BANK1_WRITE_END_ADDR    ((uint32_t)0x08010000)//数据结构//通过蓝牙发过来的串口2的数据堆栈//数据结构为循环队列,读写缓冲#define LEN_BUF512struct _FIFO_Stack{unsigned char buf[LEN_BUF];short ptr_r;short ptr_w;};//数据流式符合字符串头检索#define LEN_MATCH_STRING_HEADER 9struct _match_string_header{char match[LEN_MATCH_STRING_HEADER];int state;};//数据流式符合字符串尾检索,并提取数据结构#define LEN_MATCH_STRING_TAIL 3struct _match_string_tail{char match[LEN_MATCH_STRING_TAIL];int state;//当前状态/下标int value;//最后取得的值int max_len;//数据最大长度char capture_string[10];int capture_index;//当前捕获数据下标struct _match_string_header match_string_header;//用来比较尾是否正确int flag;//捕获数据状态或是捕获字符尾状态};//修改flashstruct _edit_flash{unsigned short buf[512];int flag;//判断flash是否被修改过int baud;//需要写入/读出的波特率};//公共变量//声明串口结构体extern USART_InitTypeDef USART_InitStructure;//声明FIFO堆栈给UART2使用extern struct _FIFO_Stack fifo_uart2;//声明FIFO堆栈给UART1使用extern struct _FIFO_Stack fifo_uart1;//声明修改flash结构体extern struct _edit_flash edit_flash;//公共函数//按照蓝牙转串口的格式发送指令void send_bt_cmd(char *str);//循环缓冲方法//初始化void init_fifo_stack(struct _FIFO_Stack *stack);//读取全部//成功返回字节数,失败返回-1short read_all_fifo_stack(struct _FIFO_Stack *stack,unsigned char *buf);//写入1个字节//失败返回-1,成功返回1int write_byte_fifo_stack(struct _FIFO_Stack *stack,unsigned char byte);//数据流式符合字符串头检索方法//初始化//成功返回1,失败返回0int init_match_string_header(struct _match_string_header *m_str,char *buf);//返回-1失败,返回0正在运行,返回1成功int match_string_header_state(struct _match_string_header *m_str,char ch);//数据流式符合字符串尾检索,并提取数据结构方法//初始化//成功返回1,失败返回0int init_match_string_tail(struct _match_string_tail *m_str,char *buf,int max_len);//返回-1失败,返回0正在运行,成功返回得到的数据int match_string_tail_state(struct _match_string_tail *m_str,char ch);//flash操作//打开需要操作页面的写保护void open_write_lock();//向flash中写入数据,1024字节,512个半字//成功返回写入的字节数,失败返回-1int write_flash(unsigned short *buf);//读取flash,读取1024字节,512半字//成功返回读取的字节数,失败返回-1int read_flash(unsigned short *buf);//读取flash,获得flag和baud//成功返回波特率,失败返回-1int read_baud(struct _edit_flash *edit);//写入波特率到flash//成功返回1,失败返回0int write_baud(struct _edit_flash *edit,int baud);#endif

public.c:

#include "public.h"//公共变量//定义串口结构体USART_InitTypeDef USART_InitStructure;//声明FIFO堆栈给UART2使用struct _FIFO_Stack fifo_uart2;//声明FIFO堆栈给UART1使用struct _FIFO_Stack fifo_uart1;//声明修改flash结构体struct _edit_flash edit_flash;//按照蓝牙转串口的格式发送指令void send_bt_cmd(char *str){while(*str != '\0'){ USART_SendData(USART2,*str++); //发送一位数据while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET){} //等待字符发送完毕}USART_SendData(USART2,'\r'); //发送一位数据while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET){} //等待字符发送完毕USART_SendData(USART2,'\n'); //发送一位数据while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET){} //等待字符发送完毕}//循环缓冲方法//初始化void init_fifo_stack(struct _FIFO_Stack *stack){stack->ptr_r = 0;stack->ptr_w = 0;memset(stack->buf,0,LEN_BUF);}//读取全部//成功返回字节数,失败返回0short read_all_fifo_stack(struct _FIFO_Stack *stack,unsigned char *buf){short i = 0;short j = 0;short len = 0;short len2 = 0;//如果已经读完,则不读if (stack->ptr_r - stack->ptr_w == 0 || \stack->ptr_r - stack->ptr_w == -1){ return -1;}//如果读指针小于写指针if (stack->ptr_r < stack->ptr_w){len =  stack->ptr_w - stack->ptr_r; for(i = 0;i < len;i++){   buf[i] = stack->buf[stack->ptr_r++];}return len;}else{ //读指针大于写指针的情况len = (LEN_BUF - 1) - stack->ptr_r + 1;len2 = stack->ptr_w;   for (i = 0;i < len;i++){ buf[j++] = stack->buf[stack->ptr_r++];}stack->ptr_r = 0;for (i = 0;i < len2;i++){ buf[j++] = stack->buf[stack->ptr_r++];}return (len + len2);}}//写入1个字节//失败返回-1,成功返回1int write_byte_fifo_stack(struct _FIFO_Stack *stack,unsigned char byte){//如果已经写完,则不写if (stack->ptr_w - stack->ptr_r == -1){ return -1;}stack->buf[stack->ptr_w++] = byte;//判断是否已经写满if (stack->ptr_w == LEN_BUF){ stack->ptr_w = 0;}}//数据流式符合字符串头检索方法//初始化//成功返回1,失败返回0int init_match_string_header(struct _match_string_header *m_str,char *buf){int len = 0;int i = 0;len = strlen(buf);if (len > LEN_MATCH_STRING_HEADER){return 0;}m_str->state = 0;for (i = 0;i < len;i++){m_str->match[i] = buf[i];}m_str->match[i] = '\0';return 1;}//返回-1失败,返回0正在运行,返回1成功int match_string_header_state(struct _match_string_header *m_str,char ch){if (ch == m_str->match[m_str->state]){m_str->state++;if (m_str->match[m_str->state] == '\0'){m_str->state = 0;return 1;}else{return 0;}}else{m_str->state = 0;return -1;}}//数据流式符合字符串尾检索,并提取数据结构方法//初始化//成功返回1,失败返回0int init_match_string_tail(struct _match_string_tail *m_str,char *buf,int max_len){int len = 0;int i = 0;len = strlen(buf);if (len > LEN_MATCH_STRING_TAIL){return 0;}m_str->state = 0;m_str->value = 0;m_str->max_len = max_len;m_str->capture_index = 0;m_str->flag = 0;for (i = 0;i < len;i++){m_str->match[i] = buf[i];}m_str->match[i] = '\0';init_match_string_header(&(m_str->match_string_header),m_str->match);return 1;}//返回-1失败,返回0正在运行,成功返回得到的数据int match_string_tail_state(struct _match_string_tail *m_str,char ch){int flag = 0;//判断是否捕获数据状态还是捕获字符尾状态if (m_str->flag || ch == 'E'){//捕获字符尾状态m_str->flag = 1;flag = match_string_header_state(&(m_str->match_string_header),ch);if (flag == -1){//初始化数据m_str->state = 0;m_str->capture_index = 0;m_str->flag = 0;}if (flag == 1){m_str->capture_string[m_str->capture_index] = '\0';m_str->value = atoi(m_str->capture_string);//初始化数据m_str->state = 0;m_str->capture_index = 0;m_str->flag = 0;return m_str->value;}return flag;}else{//捕获数据状态if (ch < '0' || ch > '9'){return -1;}//当已经达到最大数据长度且当前数据不是//当不是数据字符返回错误if (m_str->capture_index >= m_str->max_len){m_str->state = 0;m_str->capture_index = 0;m_str->flag = 0;return -1;}else{m_str->capture_string[m_str->capture_index++] = ch;//如果达到最大长度,则置为捕获字符状态if (m_str->capture_index >= m_str->max_len){m_str->flag = 1;}return 0;}}}//打开需要操作页面的写保护void open_write_lock(){uint32_t WRPR_Value = 0xFFFFFFFF, ProtectedPages = 0x0;volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;//解锁flash控制器FLASH_Unlock();//得到所有已经被写保护的页面号,如果被写保护则置0,没有则置1WRPR_Value = FLASH_GetWriteProtectionOptionByte();//需要写保护的页面置1,不需要的置0ProtectedPages = ~(WRPR_Value | FLASH_PAGES_TO_BE_PROTECTED);//检查需要的页是否被写保护if((WRPR_Value | (~FLASH_PAGES_TO_BE_PROTECTED)) != 0xFFFFFFFF ){//擦除小信息模块,关闭写保护FLASHStatus = FLASH_EraseOptionBytes();//如果不是所有页面都需要打开写保护if(ProtectedPages != 0x0){  //将其他页面置位写保护  FLASHStatus = FLASH_EnableWriteProtection(ProtectedPages);}//复位系统,重新载入小信息NVIC_SystemReset();}}//向flash中写入数据,1024字节,512个半字//成功返回写入的字节数,失败返回-1int write_flash(unsigned short *buf){uint32_t EraseCounter = 0x0,Address = 0x0;uint32_t WRPR_Value = 0xFFFFFFFF;uint32_t NbrOfPage;volatile FLASH_Status FLASHStatus = FLASH_COMPLETE;int i = 0;//得到需要操作的页面数NbrOfPage = (BANK1_WRITE_END_ADDR - BANK1_WRITE_START_ADDR) / FLASH_PAGE_SIZE;//得到所有已经被写保护的页面号,如果被写保护则置0,没有则置1WRPR_Value = FLASH_GetWriteProtectionOptionByte();//判断此页面是否被写保护,如果没有写保护则进行操作if ( (WRPR_Value & FLASH_PAGES_TO_BE_PROTECTED) != 0x00){//清除所有等待标志位FLASH_ClearFlag(FLASH_FLAG_BSY | FLASH_FLAG_EOP|FLASH_FLAG_PGERR |FLASH_FLAG_WRPRTERR);//擦数指定页面for(EraseCounter = 0; (EraseCounter < NbrOfPage) && (FLASHStatus == FLASH_COMPLETE); EraseCounter++){ FLASHStatus = FLASH_ErasePage(BANK1_WRITE_START_ADDR + (FLASH_PAGE_SIZE * EraseCounter));}//得到操作flash的起始地址Address = BANK1_WRITE_START_ADDR;//写flash,每次写2个字节while((Address < BANK1_WRITE_END_ADDR) && (FLASHStatus == FLASH_COMPLETE)){FLASHStatus = FLASH_ProgramHalfWord(Address, buf[i++]);Address = Address + 2;}return i;}else{ return -1;}}//读取flash,读取1024字节,512半字//成功返回读取的字节数,失败返回-1int read_flash(unsigned short *buf){uint32_t Address = 0x0;int i = 0;//得到操作flash的起始地址Address = BANK1_WRITE_START_ADDR;//读flash,每次读两个字节while((Address < BANK1_WRITE_END_ADDR)){buf[i++] = *(__IO uint16_t*) Address;Address += 2;}return i;}//修改flash结构的方法//初始化void init_edit_flash(struct _edit_flash *edit){  edit->flag = 0;edit->baud = 0;memset(edit->buf,0,512);}//读取flash,获得flag和baud//成功返回波特率,失败返回-1int read_baud(struct _edit_flash *edit){read_flash(edit->buf);edit->flag = edit->buf[0];edit->baud = edit->buf[1] << 16;edit->baud += edit->buf[2];if (edit->flag == 0xa5){ return (edit->baud);}else{ return -1;}}//写入波特率到flash//成功返回1,失败返回0int write_baud(struct _edit_flash *edit,int baud){edit->buf[0] = 0xa5;edit->buf[1] = baud >> 16;edit->buf[2] = baud & 0xffff;if (write_flash(edit->buf) > 0){edit->flag = 0xa5;edit->baud = baud; return 1;}else{ return 0;}}

stm32f10x_it.c:(串口中断文件)

/**  ******************************************************************************  * @file    SysTick/stm32f10x_it.c   * @author  MCD Application Team  * @version V3.4.0  * @date    10/15/2010  * @brief   Main Interrupt Service Routines.  *          This file provides template for all exceptions handler and peripherals  *          interrupt service routine.  ******************************************************************************  * @copy  *  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.  *  * <h2><center>© COPYRIGHT 2010 STMicroelectronics</center></h2>  */ /* Includes ------------------------------------------------------------------*/#include "stm32f10x_it.h"#include "main.h"#include "public.h"/** @addtogroup STM32F10x_StdPeriph_Examples  * @{  *//** @addtogroup SysTick  * @{  *//* Private typedef -----------------------------------------------------------*//* Private define ------------------------------------------------------------*//* Private macro -------------------------------------------------------------*//* Private variables ---------------------------------------------------------*//* Private function prototypes -----------------------------------------------*//* Private functions ---------------------------------------------------------*//******************************************************************************//*            Cortex-M3 Processor Exceptions Handlers                         *//******************************************************************************//**  * @brief  This function handles NMI exception.  * @param  None  * @retval None  */void NMI_Handler(void){}/**  * @brief  This function handles Hard Fault exception.  * @param  None  * @retval None  */void HardFault_Handler(void){  /* Go to infinite loop when Hard Fault exception occurs */  while (1)  {  }}/**  * @brief  This function handles Memory Manage exception.  * @param  None  * @retval None  */void MemManage_Handler(void){  /* Go to infinite loop when Memory Manage exception occurs */  while (1)  {  }}/**  * @brief  This function handles Bus Fault exception.  * @param  None  * @retval None  */void BusFault_Handler(void){  /* Go to infinite loop when Bus Fault exception occurs */  while (1)  {  }}/**  * @brief  This function handles Usage Fault exception.  * @param  None  * @retval None  */void UsageFault_Handler(void){  /* Go to infinite loop when Usage Fault exception occurs */  while (1)  {  }}/**  * @brief  This function handles SVCall exception.  * @param  None  * @retval None  */void SVC_Handler(void){}/**  * @brief  This function handles Debug Monitor exception.  * @param  None  * @retval None  */void DebugMon_Handler(void){}/**  * @brief  This function handles PendSV_Handler exception.  * @param  None  * @retval None  */void PendSV_Handler(void){}/**  * @brief  This function handles SysTick Handler.  * @param  None  * @retval None  */void SysTick_Handler(void){  TimingDelay_Decrement();}/******************************************************************************//*                 STM32F10x Peripherals Interrupt Handlers                   *//*  Add here the Interrupt Handler for the used peripheral(s) (PPP), for the  *//*  available peripheral interrupt handler's name please refer to the startup *//*  file (startup_stm32f10x_xx.s).                                            *//******************************************************************************//**  * @brief  This function handles PPP interrupt request.  * @param  None  * @retval None  *//*void PPP_IRQHandler(void){}*//**  * @}  */ /**  * @}  */   //串口1接收中断//与真实串口通信void USART1_IRQHandler(void)                             {unsigned char rx_dat;      if (USART_GetITStatus(USART1, USART_IT_RXNE) != RESET)    //判断发生接收中断{USART_ClearITPendingBit(USART1,    USART_IT_RXNE);        //清除中断标志rx_dat = USART_ReceiveData(USART1);                      //接收数据，整理除去前两位//写入fifowrite_byte_fifo_stack(&fifo_uart1,rx_dat);}}//返回src中dst字符串的标号,正确返回标号,失败返回-1//src:源字符串//dst:目标字符串//len:源字符串比较的长度int index_of_string(char *src,char *dst,int len){int size_dst = 0;int i = 0;int j = 0;//获得目标字符串长度size_dst = strlen(dst);//如果len小于目标字符串长度,返回失败if (len < size_dst){return 0;}for (i = 0;i <= len - size_dst;i++){for (j = 0;j < size_dst;j++){if (src[i + j] != dst[j]){break;}}if (j == size_dst){return i;}}return -1;}//串口2接收中断//与蓝牙串口模块通信void USART2_IRQHandler(void)                             {unsigned char rx_dat;     if (USART_GetITStatus(USART2, USART_IT_RXNE) != RESET)    //判断发生接收中断{//清除中断标志USART_ClearITPendingBit(USART2,    USART_IT_RXNE);       //接收数据 rx_dat = USART_ReceiveData(USART2);                      //写入fifowrite_byte_fifo_stack(&fifo_uart2,rx_dat);}}/******************* (C) COPYRIGHT 2010 STMicroelectronics *****END OF FILE****/

main.c:(主文件)

/*  功能:蓝牙转串口模块  作者:jdh时间:2012-2-27*/#include "public.h"static __IO uint32_t TimingDelay;//定义GPIO结构体GPIO_InitTypeDef GPIO_InitStructure;/* Private function prototypes -----------------------------------------------*/void Delay(__IO uint32_t nTime);//初始化内部晶振static void RCC_Config(void){  //将外设 RCC寄存器重设为缺省值  RCC_DeInit();  //内部晶振使能  RCC_HSICmd(ENABLE);  //使能外部晶振  //SystemInit();  //等待工作稳定  while(RCC_GetFlagStatus(RCC_FLAG_HSIRDY) == RESET);  if(1)  {    FLASH_PrefetchBufferCmd(FLASH_PrefetchBuffer_Enable);    FLASH_SetLatency(FLASH_Latency_2);//高速时钟    RCC_HCLKConfig(RCC_SYSCLK_Div1);    RCC_PCLK2Config(RCC_HCLK_Div1);    RCC_PCLK1Config(RCC_HCLK_Div2);    //设置 PLL 时钟源及倍频系数    RCC_PLLConfig(RCC_PLLSource_HSI_Div2, RCC_PLLMul_9);    //使能或者失能 PLL,这个参数可以取：ENABLE或者DISABLE    RCC_PLLCmd(ENABLE);//如果PLL被用于系统时钟,那么它不能被失能    //等待指定的 RCC 标志位设置成功 等待PLL初始化成功    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET);    //设置系统时钟（SYSCLK） 设置PLL为系统时钟源    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);    //等待PLL成功用作于系统时钟的时钟源    //  0x00：HSI 作为系统时钟     //  0x04：HSE作为系统时钟     //  0x08：PLL作为系统时钟      while(RCC_GetSYSCLKSource() != 0x08);  }} //设置串口波特率void set_uart_baud(int num,int baud){if (num == 1){//更新串口波特率USART_Cmd(USART1,DISABLE);USART_InitStructure.USART_BaudRate = baud;USART_Init(USART1,&USART_InitStructure);USART_Cmd(USART1, ENABLE);}if (num == 2){//更新串口波特率USART_Cmd(USART2,DISABLE);USART_InitStructure.USART_BaudRate = baud;USART_Init(USART2,&USART_InitStructure);USART_Cmd(USART2, ENABLE);}}//初始化void init(){//定义中断结构体NVIC_InitTypeDef NVIC_InitStructure;//初始化结构体  GPIO_StructInit(&GPIO_InitStructure);//初始化uart2的接收fifoinit_fifo_stack(&fifo_uart2);//初始化uart1的接收fifoinit_fifo_stack(&fifo_uart1);//中断NVIC设置：允许中断，设置优先级 NVIC_InitStructure.NVIC_IRQChannel = TIM1_UP_IRQn;    //更新事件 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;   //抢占优先级0 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;          //响应优先级1 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;             //允许中断 NVIC_Init(&NVIC_InitStructure);                             //写入设置 //RCC_Config();//打开串口对应的外设时钟RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1 , ENABLE); RCC_APB1PeriphClockCmd(RCC_APB1Periph_USART2 , ENABLE); //初始化参数USART_InitStructure.USART_BaudRate = DEFAULT_BAUD;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;//初始化串口USART_Init(USART1,&USART_InitStructure);//初始化参数USART_InitStructure.USART_BaudRate = DEFAULT_BAUD;USART_Init(USART2,&USART_InitStructure);//TXE发送中断,TC传输完成中断,RXNE接收中断,PE奇偶错误中断,可以是多个 USART_ITConfig(USART1,USART_IT_RXNE,ENABLE);USART_ITConfig(USART2,USART_IT_RXNE,ENABLE);//配置UART1中断NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;//通道设置为串口1中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //中断占先等级0NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;              //中断响应优先级0NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;           //打开中断NVIC_Init(&NVIC_InitStructure);                                 //初始化//配置UART2中断NVIC_InitStructure.NVIC_IRQChannel = USART2_IRQn;//通道设置为串口1中断NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0; //中断占先等级0NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;              //中断响应优先级0NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;           //打开中断NVIC_Init(&NVIC_InitStructure);                                 //初始化//启动串口USART_Cmd(USART1, ENABLE); USART_Cmd(USART2, ENABLE); //设置IO口时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);  //串口1的管脚初始化      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_9;                       //管脚9GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;                //选择GPIO响应速度GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;     //复用推挽输出    GPIO_Init(GPIOA, &GPIO_InitStructure);                          //TX初始化GPIO_InitStructure.GPIO_Pin = GPIO_Pin_10;                     //管脚10GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;   //选择GPIO响应速度GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入    GPIO_Init(GPIOA, &GPIO_InitStructure);                         //RX初始化     //设置IO口时钟 //RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA | RCC_APB2Periph_AFIO, ENABLE);  //串口2的管脚初始化      GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;                       //管脚9GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;                //选择GPIO响应速度GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;     //复用推挽输出    GPIO_Init(GPIOA, &GPIO_InitStructure);                          //TX初始化GPIO_InitStructure.GPIO_Pin = GPIO_Pin_3;                     //管脚10GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;   //选择GPIO响应速度GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING; //浮空输入    GPIO_Init(GPIOA, &GPIO_InitStructure);                         //RX初始化                                              /* Setup SysTick Timer for 1 msec interrupts  */if (SysTick_Config(SystemCoreClock / 1000)){ /* Capture error */ while (1);}//设置IO口时钟 RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB | RCC_APB2Periph_AFIO, ENABLE);     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_0;                       //管脚9GPIO_InitStructure.GPIO_Speed = GPIO_Speed_2MHz;                //选择GPIO响应速度GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;     //复用推挽输出//初始化修改flash结构init_edit_flash(&edit_flash);//打开需要操作页面的写保护open_write_lock();}init_blue(int baud){//置高AT_EN脚    GPIO_Init(GPIOB, &GPIO_InitStructure);                          GPIO_SetBits(GPIOB,GPIO_Pin_0);send_bt_cmd("AT+INIT");Delay(100);send_bt_cmd("AT+CMODE=1"); Delay(100); switch (baud){case 4800:{send_bt_cmd("AT+UART=4800,0,0"); Delay(100); break;}case 9600:{send_bt_cmd("AT+UART=9600,0,0"); Delay(100); break;}case 19200:{send_bt_cmd("AT+UART=19200,0,0"); Delay(100); break;}case 38400:{send_bt_cmd("AT+UART=38400,0,0"); Delay(100); break;}case 57600:{send_bt_cmd("AT+UART=57600,0,0"); Delay(100); break;}case 115200:{send_bt_cmd("AT+UART=115200,0,0"); Delay(100); break;}default:{send_bt_cmd("AT+UART=9600,0,0"); Delay(100); break;}}//置低AT_EN脚    GPIO_Init(GPIOB, &GPIO_InitStructure);                          GPIO_ResetBits(GPIOB,GPIO_Pin_0); }int main(void){   struct _match_string_header match_string_header;struct _match_string_tail match_string_tail;unsigned char buffer[LEN_BUF];unsigned char buffer1[LEN_BUF];int len = 0;int i = 0;int flag = 0;int flag2 = 0;int flag3 = 0;int baud = 0;//初始化系统init();//初始化蓝牙//读取flash中波特率write_baud(&edit_flash,9600);baud = read_baud(&edit_flash);//读取有效if (baud > 0){ set_uart_baud(1,baud);set_uart_baud(2,baud);}else{//设置默认波特率set_uart_baud(1,DEFAULT_BAUD);  set_uart_baud(2,DEFAULT_BAUD);}//设置默认波特率Delay(10);init_blue(DEFAULT_BAUD);set_uart_baud(1,DEFAULT_BAUD);set_uart_baud(2,DEFAULT_BAUD);Delay(500);init_blue(DEFAULT_BAUD);set_uart_baud(1,DEFAULT_BAUD);set_uart_baud(2,DEFAULT_BAUD);//初始化匹配字符init_match_string_header(&match_string_header,"AT+BAUD");init_match_string_tail(&match_string_tail,"END",8);while (1){//读取fifo_uart1中所有数据len = read_all_fifo_stack(&fifo_uart1,buffer1);//处理for (i = 0;i < len;i++){ USART_SendData(USART2,buffer1[i]);                              //发送数据while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET){}//等待发送结束}//读取fifo_uart2中所有数据len = read_all_fifo_stack(&fifo_uart2,buffer);//处理for (i = 0;i < len;i++){ if (flag == 0){flag3 = match_string_header_state(&match_string_header,buffer[i]);if (flag3 == 1){flag = 1;}}else{flag2 = match_string_tail_state(&match_string_tail,buffer[i]);if (flag2 > 0){if (flag2 == 4800 || flag2 == 9600 || flag2 == 19200 || flag2 == 38400 || flag2 == 115200){//重启蓝牙init_blue(flag2);//更新串口波特率set_uart_baud(1,flag2);//写入到flashwrite_baud(&edit_flash,flag2);//返回成功   send_bt_cmd("set baud successful\n");flag = 0;continue;}else{ send_bt_cmd("set baud fail\n");}}}//转发数据USART_SendData(USART1,buffer[i]);                              //发送数据while(USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET){}//等待发送结束}}}/**  * @brief  Inserts a delay time.  * @param  nTime: specifies the delay time length, in milliseconds.  * @retval None  */void Delay(__IO uint32_t nTime){   TimingDelay = nTime;  while(TimingDelay != 0);}/**  * @brief  Decrements the TimingDelay variable.  * @param  None  * @retval None  */void TimingDelay_Decrement(void){  if (TimingDelay != 0x00)  {     TimingDelay--;  }}#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 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) */  /* Infinite loop */  while (1)  {  }}#endif