/* * * unixSerial.c * * POSIX compatible serial port library * Uses 8 databits, no parity, 1 stop bit, no handshaking * * Copyright 2011 Thomas Buck * Copyright 2011 Max Nuding * Copyright 2011 Felix Bäder * * This file is part of LED-Cube. * * LED-Cube is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * LED-Cube is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with LED-Cube. If not, see . */ #include #include #include #include #include #include #define BAUD B19200 int fd = -1; // Open the serial port int serialOpen(char *port) { struct termios options; if ((strcmp(ttyname(fileno(stdin)), port) == 0) || (strcmp(ttyname(fileno(stdout)), port) == 0)) { return -1; } if (fd != -1) { close(fd); } fd = open(port, O_RDWR | O_NOCTTY | O_NDELAY); if (fd == -1) { return -1; } if (fcntl(fd, F_SETFL, FNDELAY) == -1) { // read() isn't blocking' close(fd); return -1; } if (tcgetattr(fd, &options) == -1) { close(fd); return -1; } if (cfsetispeed(&options, BAUD) == -1) { // Set speed close(fd); return -1; } if (cfsetospeed(&options, BAUD) == -1) { close(fd); return -1; } options.c_cflag |= (CLOCAL | CREAD); options.c_cflag &= ~PARENB; // 8N1 options.c_cflag &= ~CSTOPB; options.c_cflag &= ~CSIZE; options.c_cflag |= CS8; options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); // Raw input options.c_oflag &= ~OPOST; // Raw output options.c_iflag &= ~(IXON | IXOFF | IXANY); // No flow control if (tcsetattr(fd, TCSANOW, &options) == -1) { close(fd); return -1; } return 0; } // Write to port. Returns number of characters sent, -1 on error ssize_t serialWrite(char *data, size_t length) { return write(fd, data, length); } // Read from port. Return number of characters read, 0 if none available, -1 on error ssize_t serialRead(char *data, size_t length) { return read(fd, data, length); } // Close the serial Port void serialClose(void) { close(fd); } char** namesInDev(int *siz) { DIR *dir; struct dirent *ent; int i = 0, size = 0; char **files = NULL; dir = opendir("/dev/"); while ((ent = readdir(dir)) != NULL) { size++; } files = (char **)malloc((size + 1) * sizeof(char *)); files[size++] = NULL; closedir(dir); dir = opendir("/dev/"); while ((ent = readdir(dir)) != NULL) { files[i] = (char *)malloc((strlen(ent->d_name) + 1) * sizeof(char)); files[i] = strcpy(files[i], ent->d_name); i++; } closedir(dir); char *tmp = NULL; // Fix every string, addin /dev/ in front of it... for (i = 0; i < (size - 1); i++) { tmp = (char *)malloc((strlen(files[i]) + 6) * sizeof(char)); tmp[0] = '/'; tmp[1] = 'd'; tmp[2] = 'e'; tmp[3] = 'v'; tmp[4] = '/'; files[i] = strncat(tmp, files[i], strlen(files[i])); } *siz = size; return files; } char** getSerialPorts(const char *search) { int size; char** files = namesInDev(&size); char **fin = NULL, **finish = NULL; int i = 0, j = 0, f, g; // printf("JNI: Got files in /dev (%d)\n", size); fin = (char **)malloc(size * sizeof(char *)); // Has space for all files in dev! while (files[i] != NULL) { // Filter for SEARCH and if it is a serial port if (strstr(files[i], search) != NULL) { // We have a match // printf("JNI: %s matched %s", files[i], search); // Don't actually check if it is a serial port // It causes long delays while trying to connect // to Bluetooth devices... // f = serialOpen(files[i]); // if (f != -1) { // printf(" and is a serial port\n"); fin[j++] = files[i]; // serialClose(); // } else { // printf(" and is not a serial port\n"); // free(files[i]); // } } else { free(files[i]); } i++; } free(files); // printf("JNI: Found %d serial ports\n", j); // Copy in memory with matching size, NULL at end finish = (char **)malloc((j + 1) * sizeof(char *)); finish[j] = NULL; for (i = 0; i < j; i++) { finish[i] = fin[i]; } free(fin); return finish; }