仿真+51单片机设计程序 基于单片机的GPS全球定位系统设计.rar

unsigned char data data_item=0 unsigned int rece_num=0 /***************************************************************************************** *函数名称：void receive()interrupt 4 *函数功能：时间提取 *入口函数：无 *出口函数：无 *****************************************************************************************/ void receive()interrupt 4 //串行中断 { unsigned char temp; RI=0; temp=SBUF; rece_num++; switch (data_item) { case 0: if(temp==$) data_item++; break; case 1: if(temp=='G') data_item++; else data_item=0; break; case 2: if(temp=='P') data_item++; else data_item=0; break; case 3: if(temp=='R') data_item++; else data_item=0; break; case 4: if(temp=='M') data_item++; else data_item=0; break; case 5: if(temp=='C') data_item++; else data_item=0; break; case 6: if(temp==',') { data_item++; g_Ptr=0; g_Class=0; g_DataVari=1; } else data_item=0; break; case 7: if(temp==',') { g_Ptr=0; g_Class++; break; } if(temp=='$') { data_item=1; break; } switch(g_Class) { case 0: //提取时间数据 if(g_Ptr<6) g_DisTime[g_Ptr++]=temp; break; } default: break; } }