| wdenk | bca52d6 | 2001-10-15 12:12:42 +0000 | [diff] [blame] | 1 | #include <unistd.h> |
| 2 | #include <string.h> |
| 3 | #include <fcntl.h> |
| 4 | #include <sys/time.h> |
| 5 | #include "serial.h" |
| 6 | |
| 7 | #if defined(__sun__) || \ |
| 8 | defined(__OpenBSD__) || \ |
| 9 | defined(__FreeBSD__) || \ |
| 10 | defined(__NetBSD__) || \ |
| 11 | defined(__APPLE__) |
| 12 | static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, { 0 } }; |
| 13 | #else |
| 14 | static struct termios tios = { BRKINT, 0, B115200|CS8|CREAD, 0, 0 }; |
| 15 | #endif |
| 16 | |
| 17 | static struct speedmap { |
| 18 | char *str; |
| 19 | speed_t val; |
| 20 | } speedmap[] = { |
| 21 | { "50", B50 }, { "75", B75 }, { "110", B110 }, |
| 22 | { "134", B134 }, { "150", B150 }, { "200", B200 }, |
| 23 | { "300", B300 }, { "600", B600 }, { "1200", B1200 }, |
| 24 | { "1800", B1800 }, { "2400", B2400 }, { "4800", B4800 }, |
| 25 | { "9600", B9600 }, { "19200", B19200 }, { "38400", B38400 }, |
| 26 | { "57600", B57600 }, |
| 27 | #ifdef B76800 |
| 28 | { "76800", B76800 }, |
| 29 | #endif |
| 30 | { "115200", B115200 }, |
| 31 | #ifdef B153600 |
| 32 | { "153600", B153600 }, |
| 33 | #endif |
| 34 | { "230400", B230400 }, |
| 35 | #ifdef B307200 |
| 36 | { "307200", B307200 }, |
| 37 | #endif |
| 38 | #ifdef B460800 |
| 39 | { "460800", B460800 } |
| 40 | #endif |
| 41 | }; |
| 42 | static int nspeeds = sizeof speedmap / sizeof speedmap[0]; |
| 43 | |
| 44 | speed_t |
| 45 | cvtspeed(char *str) |
| 46 | { |
| 47 | struct speedmap *smp = speedmap, *esmp = &speedmap[nspeeds]; |
| 48 | |
| 49 | while (smp < esmp) { |
| 50 | if (strcmp(str, smp->str) == 0) |
| 51 | return (smp->val); |
| 52 | smp++; |
| 53 | } |
| 54 | return B0; |
| 55 | } |
| 56 | |
| 57 | int |
| 58 | serialopen(char *device, speed_t speed) |
| 59 | { |
| 60 | int fd; |
| 61 | |
| 62 | if (cfsetospeed(&tios, speed) < 0) |
| 63 | return -1; |
| 64 | |
| 65 | if ((fd = open(device, O_RDWR)) < 0) |
| 66 | return -1; |
| 67 | |
| 68 | if (tcsetattr(fd, TCSAFLUSH, &tios) < 0) { |
| 69 | (void)close(fd); |
| 70 | return -1; |
| 71 | } |
| 72 | |
| 73 | return fd; |
| 74 | } |
| 75 | |
| 76 | int |
| 77 | serialreadchar(int fd, int timeout) |
| 78 | { |
| 79 | fd_set fds; |
| 80 | struct timeval tv; |
| 81 | int n; |
| 82 | char ch; |
| 83 | |
| 84 | tv.tv_sec = timeout; |
| 85 | tv.tv_usec = 0; |
| 86 | |
| 87 | FD_ZERO(&fds); |
| 88 | FD_SET(fd, &fds); |
| 89 | |
| 90 | /* this is a fucking horrible quick hack - fix this */ |
| 91 | |
| 92 | if ((n = select(fd + 1, &fds, 0, 0, &tv)) < 0) |
| 93 | return SERIAL_ERROR; |
| 94 | |
| 95 | if (n == 0) |
| 96 | return SERIAL_TIMEOUT; |
| 97 | |
| 98 | if ((n = read(fd, &ch, 1)) < 0) |
| 99 | return SERIAL_ERROR; |
| 100 | |
| 101 | if (n == 0) |
| 102 | return SERIAL_EOF; |
| 103 | |
| 104 | return ch; |
| 105 | } |
| 106 | |
| 107 | int |
| 108 | serialwrite(int fd, char *buf, int len) |
| 109 | { |
| 110 | int n; |
| 111 | |
| 112 | do { |
| 113 | n = write(fd, buf, len); |
| 114 | if (n < 0) |
| 115 | return 1; |
| 116 | len -= n; |
| 117 | buf += n; |
| 118 | } while (len > 0); |
| 119 | return 0; |
| 120 | } |
| 121 | |
| 122 | int |
| 123 | serialclose(int fd) |
| 124 | { |
| 125 | return close(fd); |
| 126 | } |