在VM7.1下给虚拟机添加一个串口（运用物理串口），留意此刻在虚拟机中是串口1。
linux端程序（接纳）：
#include/*规范输入输出界说*/#include /*规范函数库界说*/#include /*Unix 规范函数界说*/#include #include #include /*文件操控界说*/#include /*PPSIX 终端操控界说*/#include /*过错号界说*/#define BAUDRATE B9600 #define MODEMDEVICE "/dev/ttyS1"int main(){int fd,c=0,res;struct termios oldtio,newtio;int ch;static char s1[20],buf[19];printf("start ...\n");/*翻开PC的COM1口*/fd = open(MODEMDEVICE,O_RDWR|O_NOCTTY);if (fd == -1 ){perror(MODEMDEVICE);exit(1);}printf("open...\n");/*将旧的通讯参数存入oldtio结构*/tcgetattr(fd,&oldtio);/*初始化新的newtio */bzero((char*)&newtio,sizeof(newtio));/*8N1*/newtio.c_cflag = BAUDRATE|CS8|CLOCAL|CREAD;newtio.c_iflag = IGNPAR;newtio.c_oflag = 0;/*正常形式*//*newtio.c_lflag = ICANON;*//*非正常形式*/newtio.c_lflag = 0;newtio.c_cc[VTIME] = 0;newtio.c_cc[VMIN] = 10;tcflush(fd,TCIFLUSH);/*新的temios作为通讯端口参数*/tcsetattr(fd,TCSANOW,&newtio);printf("writing...\n");res = read(fd,buf,10);printf("%s\n",buf);printf("close...\n");/*还原旧参数*/tcsetattr(fd,TCSANOW,&oldtio);close(fd);return 0;}
51端（运用keil2）发送：
#include#define uchar unsigned char#define uint unsigned intuchar code trdata[]={R,I,C,H,M,C,U,R,Z,-,5,1,V,2,.,0,0x0d,0x0a,0x00};sbit K1=P3^2; //对应开发板K1按键/*-------------------------------------------------------------*///串口初始化void UART_Init(void){SCON = 0x40; //串口作业方法为1TMOD = 0x20; //定时器1 作业在方法2//PCON = 0x80; //SMOD = 1; 波特率加倍TH1 = 0xfd; //波特率 9600bps fosc="11".0592MHzTL1 = 0xfd;TR1 = 1; //答应定时器1作业EA = 1; //开总中止}void delay1ms(uint i){uchar j;while(i--){for(j=0;j<115;j++) //1ms基准延时程序;}}/*-------------------------------------------------------------*///串口发送一个字符串void Uart_SendString(){ uchar i=0;while(trdata!=0x00){ SBUF=trdata;while(!TI);TI=0;i++;}}/*-------------------------------------------------------------*///主函数void main(void){UART_Init(); //初始化串口while(1){if(K1==0){delay1ms(20);if(K1==0){Uart_SendString(); //发送数据while(!K1); //等候按键开释}}}}
linux发 51接纳的差不多，仅仅51端要多出一个中止处理程序。
