VM7.1 下Ubuntu10.10 與 51單片機的串口通信實驗

linux端程序（接收）：

#include           /*標準輸入輸出定義*/#include          /*標準函數庫定義*/#include          /*Unix 標準函數定義*/#include       #include       #include           /*文件控制定義*/#include         /*PPSIX 終端控制定義*/#include           /*錯誤號定義*/#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");/*打開PC的COM1口*/fd = open(MODEMDEVICE,O_RDWR|O_NOCTTY);if (fd == -1 ){perror(MODEMDEVICE);exit(1);}printf("open...n");/*將舊的通訊參數存入oldtio結構*/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;/*正常模式*//*newtio.c_lflag = ICANON;*//*非正常模式*/newtio.c_lflag = 0;newtio.c_cc[VTIME] = 0;newtio.c_cc[VMIN] = 10;tcflush(fd,TCIFLUSH);/*新的temios作為通訊端口參數*/tcsetattr(fd,TCSANOW,&newtio);printf("writing...n");res = read(fd,buf,10);printf("%sn",buf);printf("close...n");/*還原舊參數*/tcsetattr(fd,TCSANOW,&oldtio);close(fd);return 0;}

#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; //對應開發板K1按鍵/*-------------------------------------------------------------*///串口初始化void UART_Init(void){SCON = 0x40; //串口工作方式為1TMOD = 0x20; //定時器1 工作在方式2//PCON = 0x80; //SMOD = 1; 波特率加倍TH1 = 0xfd; //波特率 9600bps fosc="11".0592MHzTL1 = 0xfd;TR1 = 1; //允許定時器1工作EA = 1; //開總中斷}void delay1ms(uint i){uchar j;while(i--){for(j=0;j<115;j++)      //1ms基準延時程序;}}/*-------------------------------------------------------------*///串口發送一個字符串void Uart_SendString(){    uchar i=0;while(trdata!=0x00){    SBUF=trdata;while(!TI);TI=0;i++;}}/*-------------------------------------------------------------*///主函數void main(void){UART_Init(); //初始化串口while(1){if(K1==0){delay1ms(20);if(K1==0){Uart_SendString(); //發送數據while(!K1);    //等待按鍵釋放}}}}