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讲解了串口通讯的几个实例

#include "COM.H"
union unionSend
{
	unsigned  char Sendstring[56];
	struct structSend
	{
		unsigned int head;//两字节头
		float Lat;//纬度
		float Lgt;
		float Hlg;//高度
		float Yaw;
		float Pitch;
		float Roll;
		float wx;//x角速度
		float wy;
		float wz;
		float wax;//x角加速度
		float way;
		float waz;
		long int GPStime;//时间hhmmss
		unsigned int CheckValue;//两字节校验

	}s1;
}Sendunion;
int ReceiveDone=0;
long int com1Count=0;
long int com1Rx_len =0;

void main(void)
{
	unsigned char key=0;



Sendunion.s1.head=0xffff;
Sendunion.s1.Lat=33.0;
Sendunion.s1.Lgt=108.0;
Sendunion.s1.Hlg=393.0;
Sendunion.s1.Yaw=150.0;
Sendunion.s1.Pitch=0.1;
Sendunion.s1.Roll=2;
Sendunion.s1.wx=1.5;
Sendunion.s1.wy=1.5;
Sendunion.s1.wz=1.5;
Sendunion.s1.wax=1.5;
Sendunion.s1.way=1.5;
Sendunion.s1.waz=1.5;
Sendunion.s1.GPStime=112233;
Sendunion.s1.CheckValue=CRC16(Sendunion.Sendstring,54);
	clrscr();
	gotoxy(70,25); printf("Quit !");

	OpenCOM(COM2, BAUD_115200,
		PARITY_NO|STOP_BIT1|DATA_BIT8, INT_MSK_TX|INT_MSK_RX);//open com2

	while (key!='Q'&&key!='q')
	{
	 if (kbhit())
			key=getch();
	 if(!com2TXBusy)
		       {
			StartSend(COM2, Sendunion.Sendstring,56);
			gotoxy(10,8);
			printf("Checkvalue:%u",Sendunion.s1.CheckValue);
			gotoxy(10,12);
			printf("GPS_Time:%ld",Sendunion.s1.GPStime);
			gotoxy(10,14);
			printf("POS:%10.6f   %10.6f   %10.6f",Sendunion.s1.Lat,Sendunion.s1.Lgt,Sendunion.s1.Hlg);
			gotoxy(10,16);
			printf("ATT:%10.6f   %10.6f   %10.6f",Sendunion.s1.Yaw,Sendunion.s1.Pitch,Sendunion.s1.Roll);
			gotoxy(10,18);
			printf("W:%10.6f   %10.6f   %10.6f",Sendunion.s1.wx,Sendunion.s1.wy,Sendunion.s1.wz);
			gotoxy(10,20);
			printf("Wa:%10.6f   %10.6f   %10.6f",Sendunion.s1.wax,Sendunion.s1.way,Sendunion.s1.waz);
			gotoxy(40,22);
			printf("TXnum:%d",com1TX);
			}
	}

CloseCOM(COM2);

}