commss.c

C语言窗口通信

#include"stdio.h"
#include"conio.h"
#include"dos.h"

#define SPACE 1024
/*--------------------三个必用函数--------------------*/
void initial_com1();                   
void open_com1();                      
void close_com1(); 

void error_file(); 
/*--------------------中断处理函数---------------------*/                   
void interrupt far asyncint();
void interrupt(*asyncoldvect)();
/*---------------------几个全局变量---------------------*/
unsigned int buffer[SPACE];
int buffin=0;
int buffout=0;


/*---------------------发送数据-----------------------*/
void my_send(int send_number)
{
   outportb(0x3f8,send_number);
   enable();
}
/*---------------------获得数据-------------------------*/
int my_receive(void)
{
   int receive_number;
   if(buffout==buffin)
      return(-1);
   else  
   { 	 
    receive_number=buffer[buffout];
    buffout=buffout+1;
    if(buffout>=SPACE)
    buffout=0;
    return receive_number;
   }
}

/*-----------------------主程序--------------------------*/
void main()
{
int press_number;
int sends;
int if_back;
char con2;
int wrong_flag=1;
FILE *fp;
char ch,filename[10];

if_back=0;

printf("\n\nplease input the name of your receiving file[the format of the file is **.txt]\n\n ");
/*----------------------文件错误处理--------------------------*/
scanf("%s",filename);
if((fp=fopen(filename,"w"))==NULL)
{
 if(!wrong_flag)
   {
   printf("can not open the file");	
   con2=getch();
   error_file(con2,wrong_flag);
   }
}
/*---------------------------打开断口---------------------------*/
open_com1();

fprintf(stdout,"\n\n1.Ready to Receive DATA\n");
printf("2.press any number key to send number\n");
printf("3.press [n] to quit\n\n\n");
printf("<---the data you receive have been saved in the file you have just created--->\n\n");
do
	{
	  if(kbhit())
	  {
	    
	     press_number=getch();
		 if(press_number=='n')
		  {
		    if_back=1;
	      	break;  
		  }
		 else
		  {
		  	/*由于此处,我在FPGA中设计串口通信时,对于ASCII码正好多一,所以这里press_number均-1*/
		 	     if(press_number==0x30){clrscr();printf("\n\n");printf("   1   2   3   4   5   6   7   8   9  [0]\n\n");printf("    press [n] to exit");}
		 	else if(press_number==0x31){clrscr();printf("\n\n");printf("  [1]  2   3   4   5   6   7   8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x32){clrscr();printf("\n\n");printf("   1  [2]  3   4   5   6   7   8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x33){clrscr();printf("\n\n");printf("   1   2  [3]  4   5   6   7   8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x34){clrscr();printf("\n\n");printf("   1   2   3  [4]  5   6   7   8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x35){clrscr();printf("\n\n");printf("   1   2   3   4  [5]  6   7   8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x36){clrscr();printf("\n\n");printf("   1   2   3   4   5  [6]  7   8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x37){clrscr();printf("\n\n");printf("   1   2   3   4   5   6  [7]  8   9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x38){clrscr();printf("\n\n");printf("   1   2   3   4   5   6   7  [8]  9   0\n\n"); printf("    press [n] to exit");}
		 	else if(press_number==0x39){clrscr();printf("\n\n");printf("   1   2   3   4   5   6   7   8  [9]  0\n\n"); printf("    press [n] to exit");}
		  }  
	     if(if_back==0) my_send(press_number+1);   	 	 
		 }
		 	 
		 	 press_number=my_receive();
	         if(press_number!=-1)
	         {
	           printf("%x",press_number);fputc(press_number,fp);
	         }  
	} while(!if_back);
	
fclose(fp);
close_com1();
}

/*===================文件错误处理=====================*/
void error_file(char con,int n)
{    
	printf("would like try again y/n");
	con=getch();
	if(con=='y') n++; 	
    if(con=='n') {n=0;exit(0);}
}
/*----------------四个功能模块------------------------------*/
/*===================打开端口=====================*/
void open_com1()
{
unsigned char temp;
disable();
asyncoldvect=getvect(0x0c);
initial_com1();
inportb(0x3f8);
inportb(0x3fe);
inportb(0x3fb);
inportb(0x3fa);
temp=inportb(0x21)&0xef;
outportb(0x21,temp);
setvect(0x0c,asyncint);
enable();
}

/*===================中断端口=====================*/
void interrupt far asyncint()
{
buffer[buffin++]=inportb(0x3f8);
if(buffin>=SPACE)
buffin=0;
outportb(0x20,0x20);
}

/*===================关闭端口=====================*/
void close_com1(void)
{
disable();
outportb(0x3f9,0x00);
outportb(0x3fc,0x00);
outportb(0x21,inportb(0x21)&0x10);
enable();
setvect(0x0c,asyncoldvect);
}

/*===================初试化端口=====================*/
void initial_com1()
{
outportb(0x3FB,0x80);    /****线路控制寄存器LCR***/
outportb(0x3F8,0x0c);    /*******baud 9600********/
outportb(0x3F9,0x00);
outportb(0x3FB,0x03);    /****帧格式：1位停止位，8位数据位，无校验位****/
outportb(0x3FC,0x08);
outportb(0x3F9,0x03);
}