Simple single-color 8x8x8 LED Cube with AVRs
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unixSerial.c 4.6KB

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  1. /*
  2. *
  3. * unixSerial.c
  4. *
  5. * POSIX compatible serial port library
  6. * Uses 8 databits, no parity, 1 stop bit, no handshaking
  7. *
  8. * Copyright 2011 Thomas Buck <xythobuz@me.com>
  9. * Copyright 2011 Max Nuding <max.nuding@gmail.com>
  10. * Copyright 2011 Felix Bäder <baeder.felix@gmail.com>
  11. *
  12. * This file is part of LED-Cube.
  13. *
  14. * LED-Cube is free software: you can redistribute it and/or modify
  15. * it under the terms of the GNU General Public License as published by
  16. * the Free Software Foundation, either version 3 of the License, or
  17. * (at your option) any later version.
  18. *
  19. * LED-Cube is distributed in the hope that it will be useful,
  20. * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21. * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  22. * GNU General Public License for more details.
  23. *
  24. * You should have received a copy of the GNU General Public License
  25. * along with LED-Cube. If not, see <http://www.gnu.org/licenses/>.
  26. */
  27. #include <stdio.h>
  28. #include <string.h>
  29. #include <unistd.h>
  30. #include <fcntl.h>
  31. #include <termios.h>
  32. #include <dirent.h>
  33. #include <errno.h>
  34. #define BAUD B19200
  35. int fd = -1;
  36. // Open the serial port
  37. int serialOpen(char *port) {
  38. struct termios options;
  39. if ((strcmp(ttyname(fileno(stdin)), port) == 0) || (strcmp(ttyname(fileno(stdout)), port) == 0)) {
  40. return -1;
  41. }
  42. if (fd != -1) {
  43. close(fd);
  44. }
  45. fd = open(port, O_RDWR | O_NOCTTY | O_NDELAY);
  46. if (fd == -1) {
  47. return -1;
  48. }
  49. if (fcntl(fd, F_SETFL, FNDELAY) == -1) { // read() isn't blocking'
  50. close(fd);
  51. return -1;
  52. }
  53. if (tcgetattr(fd, &options) == -1) {
  54. close(fd);
  55. return -1;
  56. }
  57. if (cfsetispeed(&options, BAUD) == -1) { // Set speed
  58. close(fd);
  59. return -1;
  60. }
  61. if (cfsetospeed(&options, BAUD) == -1) {
  62. close(fd);
  63. return -1;
  64. }
  65. options.c_cflag |= (CLOCAL | CREAD);
  66. options.c_cflag &= ~PARENB; // 8N1
  67. options.c_cflag &= ~CSTOPB;
  68. options.c_cflag &= ~CSIZE;
  69. options.c_cflag |= CS8;
  70. options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); // Raw input
  71. options.c_oflag &= ~OPOST; // Raw output
  72. options.c_iflag &= ~(IXON | IXOFF | IXANY); // No flow control
  73. if (tcsetattr(fd, TCSANOW, &options) == -1) {
  74. close(fd);
  75. return -1;
  76. }
  77. return 0;
  78. }
  79. // Write to port. Returns number of characters sent, -1 on error
  80. ssize_t serialWrite(char *data, size_t length) {
  81. return write(fd, data, length);
  82. }
  83. // Read from port. Return number of characters read, 0 if none available, -1 on error
  84. ssize_t serialRead(char *data, size_t length) {
  85. ssize_t temp = read(fd, data, length);
  86. if ((temp == -1) && (errno == EAGAIN)) {
  87. return 0;
  88. } else {
  89. return temp;
  90. }
  91. }
  92. // Close the serial Port
  93. void serialClose(void) {
  94. close(fd);
  95. }
  96. char** namesInDev(int *siz) {
  97. DIR *dir;
  98. struct dirent *ent;
  99. int i = 0, size = 0;
  100. char **files = NULL;
  101. dir = opendir("/dev/");
  102. while ((ent = readdir(dir)) != NULL) {
  103. size++;
  104. }
  105. files = (char **)malloc((size + 1) * sizeof(char *));
  106. files[size++] = NULL;
  107. closedir(dir);
  108. dir = opendir("/dev/");
  109. while ((ent = readdir(dir)) != NULL) {
  110. files[i] = (char *)malloc((strlen(ent->d_name) + 1) * sizeof(char));
  111. files[i] = strcpy(files[i], ent->d_name);
  112. i++;
  113. }
  114. closedir(dir);
  115. char *tmp = NULL;
  116. // Fix every string, addin /dev/ in front of it...
  117. for (i = 0; i < (size - 1); i++) {
  118. tmp = (char *)malloc((strlen(files[i]) + 6) * sizeof(char));
  119. tmp[0] = '/';
  120. tmp[1] = 'd';
  121. tmp[2] = 'e';
  122. tmp[3] = 'v';
  123. tmp[4] = '/';
  124. files[i] = strncat(tmp, files[i], strlen(files[i]));
  125. }
  126. *siz = size;
  127. return files;
  128. }
  129. char** getSerialPorts(const char *search) {
  130. int size;
  131. char** files = namesInDev(&size);
  132. char **fin = NULL, **finish = NULL;
  133. int i = 0, j = 0, f, g;
  134. // printf("JNI: Got files in /dev (%d)\n", size);
  135. fin = (char **)malloc(size * sizeof(char *));
  136. // Has space for all files in dev!
  137. while (files[i] != NULL) {
  138. // Filter for SEARCH and if it is a serial port
  139. if (strstr(files[i], search) != NULL) {
  140. // We have a match
  141. // printf("JNI: %s matched %s", files[i], search);
  142. // Don't actually check if it is a serial port
  143. // It causes long delays while trying to connect
  144. // to Bluetooth devices...
  145. // f = serialOpen(files[i]);
  146. // if (f != -1) {
  147. // printf(" and is a serial port\n");
  148. fin[j++] = files[i];
  149. // serialClose();
  150. // } else {
  151. // printf(" and is not a serial port\n");
  152. // free(files[i]);
  153. // }
  154. } else {
  155. free(files[i]);
  156. }
  157. i++;
  158. }
  159. free(files);
  160. // printf("JNI: Found %d serial ports\n", j);
  161. // Copy in memory with matching size, NULL at end
  162. finish = (char **)malloc((j + 1) * sizeof(char *));
  163. finish[j] = NULL;
  164. for (i = 0; i < j; i++) {
  165. finish[i] = fin[i];
  166. }
  167. free(fin);
  168. return finish;
  169. }