STM32+GPS

只看该作者 · 2013-7-11 17:08

STM32103VET6 库函数3.5

网上找了个处理GPS数据的例程，大概改了改，但是不出数。大家能给看看吗？

void USART1_IRQHandler(void)
{
u8 ch;

if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) //若接收数据寄存器满
{
USART_ClearITPendingBit(USART1,USART_IT_RXNE);  //清中断标志位
ch = USART_ReceiveData(USART1);

if ((ch == '$') && (gps_flag == 0))  //如果收到字符'$'，便开始接收
{
   rev_start = 1;
   rev_stop  = 0;
}

if (rev_start == 1)  //标志位为1，开始接收
{
rev_buf[num++] = ch;  //字符存到数组中
if (ch == '\n')  //如果接收到换行
{
   USART_ITConfig(USART1,USART_IT_RXNE,DISABLE);  //关闭USART1 接收中断
   rev_buf[num] = '\0';
   rev_start = 0;
   rev_stop  = 1;
   gps_flag = 1;
   num = 0;

   if (rev_stop) //如果接收完一行
   {
   if (GPS_GGA_Parse(rev_buf, &GPS)) //解析GPGGA
   {
      error_num = 0;
      gps_flag = 0;
      rev_stop = 0;
   gpgga_flag = 1;
   }
   else
   {
   error_num++;
   if (error_num >= 20) //如果数据无效超过20次
            {
            error_num = 20;
            }
            gps_flag = 0;
            rev_stop = 0;
   gpgga_flag = 0;
   }

if (GPS_RMC_Parse(rev_buf, &GPS)) //解析GPRMC
   {
      error_num = 0;
   gps_flag = 0;
      rev_stop  = 0;
   gprmc_flag = 1;
   }
else
   {
      error_num++;
      if (error_num >= 20) //如果数据无效超过20次
      {
   error_num = 20;
      }
      gps_flag = 0;
      rev_stop  = 0;
   gprmc_flag = 0;
   }

            if (GPS_GSV_Parse(rev_buf, &GPS)) //解析GPGGA
   {
      error_num = 0;
      gps_flag = 0;
      rev_stop = 0;
   gpgsv_flag = 1;
   }
   else
   {
   error_num++;
   if (error_num >= 20) //如果数据无效超过20次
            {
            error_num = 20;
            }
            gps_flag = 0;
            rev_stop = 0;
   gpgsv_flag = 0;
   }

   }

   }
  }
}
}