stm32+HC05 蓝牙应用

只看该作者 · 2017-11-25 22:35

HC05 简介
BH-HC05 是蓝牙串口模块，它采用蓝牙 2.0 协议，可与任何版本的蓝牙兼容通讯，包括与具有蓝牙功能的电脑、蓝牙主机、手机、PDA、PSP 等终端配对，可实现串口透传功能。驱动 HC05 模块时只需要使用 TTL 电平标准的串口即可(5V/3.3V 电压均可)，支持的波特率范围为 4800~1382400，非常适合用于单片机系统扩展蓝牙特性。

只看该作者 · 2017-11-25 22:37

tatic void HC05_GPIO_Config(void)
{

GPIO_InitTypeDef GPIO_InitStructure;

/*开启GPIO时钟*/
RCC_APB2PeriphClockCmd( BLT_INT_GPIO_CLK|BLT_KEY_GPIO_CLK, ENABLE);

GPIO_InitStructure.GPIO_Pin = BLT_INT_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_IN_FLOATING;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(BLT_INT_GPIO_PORT, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = BLT_KEY_GPIO_PIN;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_Out_PP;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
GPIO_Init(BLT_KEY_GPIO_PORT, &GPIO_InitStructure);

}

只看该作者 · 2017-11-25 22:46

uint8_t HC05_Send_CMD(char* cmd,uint8_t clean)
{
uint8_t retry=5;
uint8_t i,result=1;

while(retry--)
{
BLT_KEY_HIGHT;
delay_ms(10);
Usart_SendString(HC05_USART,(uint8_t *)cmd);

for(i=0;i<20;i++)
{
uint16_t len;
char * redata;

delay_ms(10);

redata = get_rebuff(&len);
if(len>0)
{
if(redata[0]!=0)
{
HC05_DEBUG("send CMD: %s",cmd);

HC05_DEBUG("receive %s",redata);
}
if(strstr(redata,"OK"))
{

if(clean==1)
clean_rebuff();
return 0;
}
else
{
//clean_rebuff();
}
}
else
{
delay_ms(100);
}
}
HC05_DEBUG("HC05 send CMD fail %d times",retry);
}

HC05_DEBUG("HC05 send CMD fail ");

if(clean==1)
clean_rebuff();

return result ;

}

只看该作者 · 2017-11-26 11:43

void HC05_SendString(char* str)
{
BLT_KEY_LOW;

Usart_SendString(HC05_USART,(uint8_t *)str);

}

只看该作者 · 2017-11-26 11:46

uint8_t HC05_Init(void)
{
uint8_t i;

HC05_GPIO_Config();

BLT_USART_Config();

for(i=0;i<BLTDEV_MAX_NUM;i++)
{
sprintf(bltDevList.unpraseAddr[i]," ");
sprintf(bltDevList.name[i]," ");

}
bltDevList.num = 0;

return HC05_Send_CMD("AT\r\n",1);
}

只看该作者 · 2017-11-26 11:49

unsigned long htoul(const char *str)
{

  long result = 0;

  if (!str)
return 0;

  while (*str)
  {
uint8_t value;

if (*str >= 'a' && *str <= 'f')
   value = (*str - 'a') + 10;
else if (*str >= 'A' && *str <= 'F')
   value = (*str - 'A') + 10;
else if (*str >= '0' && *str <= '9')
   value = *str - '0';
else
   break;

result = (result * 16) + value;
++str;
  }

  return result;
}

只看该作者 · 2017-11-26 11:49

char *skipPrefix(char *str, size_t str_length, const char *prefix)
{

  uint16_t prefix_length = strlen(prefix);

  if (!str || str_length == 0 || !prefix)
return 0;

  if (str_length >= prefix_length && strncmp(str, prefix, prefix_length) == 0)
return str + prefix_length;

  return 0;
}

只看该作者 · 2017-11-26 11:54

int get_line(char* line, char* stream ,int max_size)
{
char *p;
int len = 0;
p=stream;
while( *p != '\0' && len < max_size ){
      line[len++] = *p;
p++;
      if('\n' == *p || '\r'==*p)
         break;
}

if(*p != '\0' && *p != '\n' && *p != '\r')
return 0;


line[len] = '\0';
return len;
}

只看该作者 · 2017-11-26 11:57

void writeCommand(const char *command, const char *arg)
{
char str_buf[50];

BLT_KEY_HIGHT;
delay_ms(10);

if (arg && arg[0] != 0)
sprintf(str_buf,"AT+%s%s\r\n",command,arg);
else if (command && command[0] != 0)
{
sprintf(str_buf,"AT+%s\r\n",command);
}
else
sprintf(str_buf,"AT\r\n");

HC05_DEBUG("CMD send:%s",str_buf);

Usart_SendString(HC05_USART,(uint8_t *)str_buf);

}

只看该作者 · 2017-11-26 12:00

uint8_t parseBluetoothAddress(BLTDev *bltDev)
{
/* Address should look like "+ADDR:<NAP>:<UAP>:<LAP>",
* where actual address will look like "1234:56:abcdef".
*/

char* redata;
uint16_t len;

char linebuff[50];
uint16_t linelen;

uint16_t getlen=0;
uint8_t linenum=0;

uint8_t i;

char *p;

HC05_Send_CMD("AT+INQ\r\n",0);

redata =get_rebuff(&len);

if(redata[0] != 0 && strstr(redata, "+INQ:") != 0)
{
HC05_DEBUG("rebuf =%s",redata);

getNewLine:
while(getlen < len-2*linenum )
{
linelen = get_line(linebuff,redata+getlen+2*linenum,len);
if(linelen>50 && linelen != 0)
{
HC05_Send_CMD("AT+INQC\r\n",1);//退出前中断查询
return 1;
}

getlen += linelen;
linenum++;

p = skipPrefix(linebuff,linelen,"+INQ:");
if(p!=0)
{
uint8_t num ;
num = bltDev->num;

strBLTAddr(bltDev,':');

for(i=0;i<=num;i++)
{
if(strstr(linebuff,bltDev->unpraseAddr[i]) != NULL)
{
goto getNewLine; //!=null时，表示该地址与解码语句的地址相同
}
}

/*若蓝牙设备不在列表中，对地址进行解码*/
bltDev->addr[num].NAP = htoul(p);
p = strchr(p,':');

if (p == 0)
{
HC05_Send_CMD("AT+INQC\r\n",1);//退出前中断查询
return 1;
}

bltDev->addr[num].UAP = htoul(++p);
p = strchr(p,':');

if (p == 0)
{
HC05_Send_CMD("AT+INQC\r\n",1);//退出前中断查询
return 1;
}

bltDev->addr[num].LAP = htoul(++p);

/*存储蓝牙地址(字符串形式)*/
sprintf(bltDev->unpraseAddr[num],"%X:%X:%X",bltDev->addr[num].NAP,bltDev->addr[num].UAP,bltDev->addr[num].LAP);

bltDev->num++;

}

}

clean_rebuff();

HC05_Send_CMD("AT+INQC\r\n",1);//退出前中断查询
return 0;
}

else
{
clean_rebuff();

HC05_Send_CMD("AT+INQC\r\n",1);//退出前中断查询
return 1;
}

}

只看该作者 · 2017-11-26 12:00

void strBLTAddr(BLTDev *bltDev,char delimiter)
{
uint8_t i;

if(bltDev->num==0)
{
HC05_DEBUG("/*******No other BLT Device********/");
}
else
{
for(i=0;i<bltDev->num;i++)
{
sprintf(bltDev->unpraseAddr[i],"%X%c%X%c%X",bltDev->addr[i].NAP,delimiter,bltDev->addr[i].UAP,delimiter,bltDev->addr[i].LAP);
}
}

}

只看该作者 · 2017-11-26 12:00

uint8_t getRemoteDeviceName(BLTDev *bltDev)
{
uint8_t i;
char *redata;
uint16_t len;

char linebuff[50];
uint16_t linelen;
char *p;

char cmdbuff[100];

strBLTAddr(bltDev,',');

HC05_DEBUG("device num =%d",bltDev->num);

for(i=0;i<bltDev->num;i++)
{
sprintf(cmdbuff,"AT+RNAME?%s\r\n",bltDev->unpraseAddr[i]);
HC05_Send_CMD(cmdbuff,0);

redata =get_rebuff(&len);
if(redata[0] != 0 && strstr(redata, "OK") != 0)
{

linelen = get_line(linebuff,redata,len);
if(linelen>50 && linelen !=0 ) linebuff[linelen]='\0'; //超长截断

p = skipPrefix(linebuff,linelen,"+RNAME:");
if(p!=0)
{
strcpy(bltDev->name[i],p);
}

}
else
{
clean_rebuff();
return 1;
}

clean_rebuff();

}

return 0;

}