1 | // Return: <0 bei Fehler sonst handle
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2 | int openCDC(char *device, int baud, char stopbits)
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3 | {
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4 | int fdser=0;
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5 |
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6 | /* das Device öffnen */
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7 | if( (fdser = open(device, O_RDWR | O_NOCTTY | O_NDELAY)) < 0 )
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8 | {
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9 | if ( CDCverbose )
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10 | printf("Fehler: Serielles Device %s kann nicht geoeffnet werden:%04x.\n", device, fdser);
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11 | return -2;
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12 | }
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13 |
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14 | if ( CDCverbose )
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15 | printf("Serielles Device %s geöffnet:%04x.\n", device, fdser);
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16 |
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17 | //fcntl(fd, F_SETFL, 0); // Set the file status flags
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18 | fcntl(fdser, F_SETFL, FNDELAY); // return imediate if no input available
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19 |
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20 | if ( tcgetattr(fdser,&oldtios)!=0 && CDCverbose )
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21 | printf("tcgetattr failed\n");
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22 |
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23 | if (tcgetattr(fdser, &options) != 0)
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24 | return -1;
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25 |
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26 | if ( CDCverbose )
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27 | {
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28 | printf("cflag:%x\n", options.c_cflag);
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29 | printf("lflag:%x\n", options.c_lflag);
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30 | printf("oflag:%x\n", options.c_oflag);
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31 | printf("iflag:%x\n", options.c_iflag);
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32 | printf("Serielles Device %s initialisiert.\n", device);
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33 | }
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34 |
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35 | switch ( baud )
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36 | {
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37 | case 2400: baud = B2400; break;
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38 | case 4800: baud = B4800; break;
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39 | case 9600: baud = B9600; break;
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40 | default: baud = B19200;
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41 | }
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42 | cfsetispeed(&options, baud); /* setze baudrates */
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43 | cfsetospeed(&options, baud);
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44 |
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45 | options.c_cflag &= ~PARENB; /* Paritybit */
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46 | if ( stopbits==1 )
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47 | options.c_cflag &= ~CSTOPB; /* 1 Stopbit */
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48 | else
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49 | options.c_cflag |= CSTOPB; /* 2 Stopbits */
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50 | options.c_cflag &= ~CSIZE; /* 8 Datenbits */
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51 | options.c_cflag |= CS8;
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52 | options.c_cflag |= (CLOCAL | CREAD); /* CD-Signal ignorieren */
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53 | /* Kein Echo, keine Steuerzeichen, keine Interrupts */
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54 | options.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG);
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55 | options.c_oflag &= ~OPOST; /* setze "raw" output */
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56 | options.c_iflag &= ~ICRNL; /* CR nicht auf LF setzen */
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57 | options.c_cc[VMIN] = 0; /* warten auf min. 0 Zeichen */
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58 | options.c_cc[VTIME] = 10; /* Timeout 10 Sekunden */
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59 |
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60 | tcflush(fdser,TCIOFLUSH);
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61 | if (tcsetattr(fdser, TCSAFLUSH, &options) != 0)
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62 | {
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63 | if ( CDCverbose )
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64 | printf("Fehler bei tcsetattr.\n");
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65 | fdser = -1;
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66 | }
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67 |
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68 | if ( CDCverbose )
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69 | {
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70 | printf("cflag:%x\n", options.c_cflag);
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71 | printf("lflag:%x\n", options.c_lflag);
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72 | printf("oflag:%x\n", options.c_oflag);
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73 | printf("iflag:%x\n", options.c_iflag);
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74 | }
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75 |
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76 | return fdser;
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77 | }
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