Linux下串口C語言編程
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串口操作代碼#include #include #include #include #include #include #include #include #include #define BUFFER_SIZE 1024#define HOST_PORT 1int set_port(int fd, int baud_rate, int data_bits, char parity, int stop_bits){ struct termios newtio,oldtio; if( tcgetattr(fd,&oldtio) != 0) { perror("Setup Serial 1"); return -1; } bzero(&newtio,sizeof(newtio)); newtio.c_cflag |= CLOCAL | CREAD; newtio.c_cflag &= ~CSIZE; /* set baud_speed*/ switch(baud_rate) { case 2400: cfsetispeed(&newtio,B2400); cfsetospeed(&newtio,B2400); break; case 4800: cfsetispeed(&newtio,B4800); cfsetospeed(&newtio,B4800); break; case 9600: cfsetispeed(&newtio,B9600); cfsetospeed(&newtio,B9600); break; case 19200: cfsetispeed(&newtio,B19200); cfsetospeed(&newtio,B19200); break; case 38400: cfsetispeed(&newtio,B38400); cfsetospeed(&newtio,B38400); break; default: case 115200: cfsetispeed(&newtio,B115200); cfsetospeed(&newtio,B115200); break; } /* set data_bits upon 7 or 8*/ switch(data_bits) { case 7: newtio.c_cflag |= CS7; break; default : case 8: newtio.c_cflag |= CS8; break; } /**/ switch(parity) { default: case 'N': case 'n': { newtio.c_cflag &= ~PARENB; newtio.c_iflag &= ~INPCK; } break; case 'o': case 'O': { newtio.c_cflag |= (PARODD | PARENB); newtio.c_iflag |= INPCK; } break; case 'e': case 'E': { newtio.c_cflag |= PARENB; newtio.c_cflag &= ~PARODD; newtio.c_iflag |= INPCK; } break; case 's': case 'S': { newtio.c_cflag &= ~PARENB; newtio.c_cflag &= ~CSTOPB; } break; } /*set stop_bits 1 or 2 */ switch(stop_bits) { default: case 1: { newtio.c_cflag &= ~CSTOPB; } break; case 2: { newtio.c_cflag |= CSTOPB; } break; } newtio.c_cc[VTIME] = 0; newtio.c_cc[VMIN] = 1; tcflush(fd,TCIFLUSH); if((tcsetattr(fd,TCSANOW,&newtio)) != 0) { perror("com set error"); return -1; } printf("set UART done!\n"); return 0;}int open_port(int com_port){ int fd = 0; char *dev[] = { 關?鍵?詞： Linux 串口 語言 編程
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