]>
Commit | Line | Data |
---|---|---|
74510d4b ML |
1 | /* |
2 | * This file is part of the libserialport project. | |
3 | * | |
4 | * Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com> | |
5 | * Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de> | |
6 | * Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li> | |
7 | * | |
8 | * This program is free software: you can redistribute it and/or modify | |
9 | * it under the terms of the GNU Lesser General Public License as | |
10 | * published by the Free Software Foundation, either version 3 of the | |
11 | * License, or (at your option) any later version. | |
12 | * | |
13 | * This program is distributed in the hope that it will be useful, | |
14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | * GNU General Public License for more details. | |
17 | * | |
18 | * You should have received a copy of the GNU Lesser General Public License | |
19 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
22 | #include <string.h> | |
23 | #include <sys/types.h> | |
24 | #include <sys/stat.h> | |
25 | #include <fcntl.h> | |
26 | #include <unistd.h> | |
3b63f34d ML |
27 | #include <stdlib.h> |
28 | #include <errno.h> | |
74510d4b ML |
29 | #ifdef _WIN32 |
30 | #include <windows.h> | |
3b63f34d | 31 | #include <tchar.h> |
74510d4b | 32 | #else |
74510d4b ML |
33 | #include <termios.h> |
34 | #include <sys/ioctl.h> | |
35 | #endif | |
3b63f34d | 36 | #ifdef __APPLE__ |
1ebf4347 ML |
37 | #include <IOKit/IOKitLib.h> |
38 | #include <IOKit/serial/IOSerialKeys.h> | |
39 | #include <sys/syslimits.h> | |
3b63f34d ML |
40 | #endif |
41 | #ifdef __linux__ | |
42 | #include "libudev.h" | |
4b97c9fc | 43 | #include "linux/serial.h" |
3b63f34d | 44 | #endif |
74510d4b ML |
45 | |
46 | #include "serialport.h" | |
47 | ||
77f262c4 | 48 | int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr) |
d54e9004 ML |
49 | { |
50 | struct sp_port *port; | |
5919c913 | 51 | int len; |
d54e9004 | 52 | |
77f262c4 ML |
53 | *port_ptr = NULL; |
54 | ||
d4babed2 | 55 | if (!portname) |
77f262c4 | 56 | return SP_ERR_ARG; |
d4babed2 | 57 | |
d54e9004 | 58 | if (!(port = malloc(sizeof(struct sp_port)))) |
77f262c4 | 59 | return SP_ERR_MEM; |
d54e9004 | 60 | |
5919c913 ML |
61 | len = strlen(portname) + 1; |
62 | ||
d54e9004 ML |
63 | if (!(port->name = malloc(len))) |
64 | { | |
65 | free(port); | |
77f262c4 | 66 | return SP_ERR_MEM; |
d54e9004 ML |
67 | } |
68 | ||
69 | memcpy(port->name, portname, len); | |
70 | ||
77f262c4 ML |
71 | *port_ptr = port; |
72 | ||
73 | return SP_OK; | |
d54e9004 ML |
74 | } |
75 | ||
e3b2f7a4 ML |
76 | void sp_free_port(struct sp_port *port) |
77 | { | |
78 | if (!port) | |
79 | return; | |
80 | ||
81 | if (port->name) | |
82 | free(port->name); | |
83 | ||
84 | free(port); | |
85 | } | |
86 | ||
5919c913 | 87 | static struct sp_port **sp_list_append(struct sp_port **list, const char *portname) |
3b63f34d ML |
88 | { |
89 | void *tmp; | |
90 | unsigned int count; | |
91 | for (count = 0; list[count]; count++); | |
d54e9004 | 92 | if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2)))) |
3b63f34d ML |
93 | goto fail; |
94 | list = tmp; | |
77f262c4 | 95 | if (sp_get_port_by_name(portname, &list[count]) != SP_OK) |
3b63f34d | 96 | goto fail; |
db2794ce | 97 | list[count + 1] = NULL; |
3b63f34d ML |
98 | return list; |
99 | fail: | |
100 | sp_free_port_list(list); | |
101 | return NULL; | |
102 | } | |
103 | ||
68ab64cc ML |
104 | /** |
105 | * List the serial ports available on the system. | |
106 | * | |
107 | * @return A null-terminated array of port name strings. | |
108 | */ | |
77f262c4 | 109 | int sp_list_ports(struct sp_port ***list_ptr) |
3b63f34d | 110 | { |
d54e9004 | 111 | struct sp_port **list; |
77f262c4 | 112 | int ret = SP_OK; |
24c1a4bb | 113 | |
d54e9004 | 114 | if (!(list = malloc(sizeof(struct sp_port **)))) |
77f262c4 | 115 | return SP_ERR_MEM;; |
24c1a4bb ML |
116 | |
117 | list[0] = NULL; | |
3b63f34d ML |
118 | |
119 | #ifdef _WIN32 | |
120 | HKEY key; | |
bdfb5b8c ML |
121 | TCHAR *value, *data; |
122 | DWORD max_value_len, max_data_size, max_data_len; | |
123 | DWORD value_len, data_size, data_len; | |
3b63f34d | 124 | DWORD type, index = 0; |
8b532d9c ML |
125 | char *name; |
126 | int name_len; | |
3b63f34d ML |
127 | |
128 | if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"), | |
129 | 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) | |
77f262c4 ML |
130 | { |
131 | ret = SP_ERR_FAIL; | |
132 | goto out_done; | |
133 | } | |
3b63f34d | 134 | if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
bdfb5b8c | 135 | &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) |
77f262c4 ML |
136 | { |
137 | ret = SP_ERR_FAIL; | |
3b63f34d | 138 | goto out_close; |
77f262c4 | 139 | } |
3b63f34d | 140 | max_data_len = max_data_size / sizeof(TCHAR); |
bdfb5b8c | 141 | if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) |
77f262c4 ML |
142 | { |
143 | ret = SP_ERR_MEM; | |
3b63f34d | 144 | goto out_close; |
77f262c4 | 145 | } |
3b63f34d | 146 | if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) |
77f262c4 ML |
147 | { |
148 | ret = SP_ERR_MEM; | |
bdfb5b8c | 149 | goto out_free_value; |
77f262c4 | 150 | } |
3b63f34d | 151 | while ( |
bdfb5b8c | 152 | value_len = max_value_len, |
3b63f34d | 153 | data_size = max_data_size, |
bdfb5b8c | 154 | RegEnumValue(key, index, value, &value_len, |
3b63f34d ML |
155 | NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS) |
156 | { | |
157 | data_len = data_size / sizeof(TCHAR); | |
158 | data[data_len] = '\0'; | |
8b532d9c ML |
159 | #ifdef UNICODE |
160 | name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL) | |
161 | #else | |
162 | name_len = data_len + 1; | |
163 | #endif | |
164 | if (!(name = malloc(name_len))) | |
77f262c4 ML |
165 | { |
166 | ret = SP_ERR_MEM; | |
8b532d9c | 167 | goto out; |
77f262c4 | 168 | } |
8b532d9c ML |
169 | #ifdef UNICODE |
170 | WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL); | |
171 | #else | |
172 | strcpy(name, data); | |
173 | #endif | |
77f262c4 ML |
174 | if (type == REG_SZ && !(list = sp_list_append(list, name))) |
175 | { | |
176 | ret = SP_ERR_MEM; | |
177 | goto out; | |
178 | } | |
3b63f34d ML |
179 | index++; |
180 | } | |
181 | out: | |
182 | free(data); | |
bdfb5b8c ML |
183 | out_free_value: |
184 | free(value); | |
3b63f34d ML |
185 | out_close: |
186 | RegCloseKey(key); | |
77f262c4 | 187 | out_done: |
3b63f34d ML |
188 | #endif |
189 | #ifdef __APPLE__ | |
190 | mach_port_t master; | |
191 | CFMutableDictionaryRef classes; | |
192 | io_iterator_t iter; | |
193 | char *path; | |
194 | io_object_t port; | |
195 | CFTypeRef cf_path; | |
196 | Boolean result; | |
197 | ||
198 | if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) | |
77f262c4 ML |
199 | { |
200 | ret = SP_ERR_FAIL; | |
201 | goto out_done; | |
202 | } | |
3b63f34d ML |
203 | |
204 | if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) | |
77f262c4 ML |
205 | { |
206 | ret = SP_ERR_FAIL; | |
207 | goto out_done; | |
208 | } | |
3b63f34d ML |
209 | |
210 | CFDictionarySetValue(classes, | |
211 | CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes)); | |
212 | ||
213 | if (!(IOServiceGetMatchingServices(master, classes, &iter))) | |
77f262c4 ML |
214 | { |
215 | ret = SP_ERR_FAIL; | |
216 | goto out_done; | |
217 | } | |
3b63f34d ML |
218 | |
219 | if (!(path = malloc(PATH_MAX))) | |
77f262c4 ML |
220 | { |
221 | ret = SP_ERR_MEM; | |
3b63f34d | 222 | goto out_release; |
77f262c4 | 223 | } |
3b63f34d | 224 | |
1ebf4347 | 225 | while ((port = IOIteratorNext(iter))) { |
3b63f34d ML |
226 | cf_path = IORegistryEntryCreateCFProperty(port, |
227 | CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0); | |
228 | if (cf_path) { | |
229 | result = CFStringGetCString(cf_path, | |
230 | path, PATH_MAX, kCFStringEncodingASCII); | |
231 | CFRelease(cf_path); | |
77f262c4 ML |
232 | if (result && !(list = sp_list_append(list, path))) |
233 | { | |
234 | ret = SP_ERR_MEM; | |
235 | IOObjectRelease(port); | |
236 | goto out; | |
237 | } | |
3b63f34d ML |
238 | } |
239 | IOObjectRelease(port); | |
240 | } | |
3b63f34d ML |
241 | out: |
242 | free(path); | |
243 | out_release: | |
244 | IOObjectRelease(iter); | |
77f262c4 | 245 | out_done: |
3b63f34d ML |
246 | #endif |
247 | #ifdef __linux__ | |
248 | struct udev *ud; | |
249 | struct udev_enumerate *ud_enumerate; | |
250 | struct udev_list_entry *ud_list; | |
251 | struct udev_list_entry *ud_entry; | |
252 | const char *path; | |
08fe0bdb | 253 | struct udev_device *ud_dev, *ud_parent; |
3b63f34d | 254 | const char *name; |
4b97c9fc ML |
255 | const char *driver; |
256 | int fd, ioctl_result; | |
257 | struct serial_struct serial_info; | |
3b63f34d ML |
258 | |
259 | ud = udev_new(); | |
260 | ud_enumerate = udev_enumerate_new(ud); | |
261 | udev_enumerate_add_match_subsystem(ud_enumerate, "tty"); | |
262 | udev_enumerate_scan_devices(ud_enumerate); | |
263 | ud_list = udev_enumerate_get_list_entry(ud_enumerate); | |
3b63f34d ML |
264 | udev_list_entry_foreach(ud_entry, ud_list) |
265 | { | |
266 | path = udev_list_entry_get_name(ud_entry); | |
267 | ud_dev = udev_device_new_from_syspath(ud, path); | |
08fe0bdb ML |
268 | /* If there is no parent device, this is a virtual tty. */ |
269 | ud_parent = udev_device_get_parent(ud_dev); | |
270 | if (ud_parent == NULL) | |
271 | { | |
272 | udev_device_unref(ud_dev); | |
273 | continue; | |
274 | } | |
3b63f34d | 275 | name = udev_device_get_devnode(ud_dev); |
4b97c9fc ML |
276 | /* The serial8250 driver has a hardcoded number of ports. |
277 | * The only way to tell which actually exist on a given system | |
278 | * is to try to open them and make an ioctl call. */ | |
279 | driver = udev_device_get_driver(ud_parent); | |
280 | if (driver && !strcmp(driver, "serial8250")) | |
281 | { | |
282 | if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0) | |
283 | goto skip; | |
284 | ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info); | |
285 | close(fd); | |
286 | if (ioctl_result != 0) | |
287 | goto skip; | |
288 | if (serial_info.type == PORT_UNKNOWN) | |
289 | goto skip; | |
290 | } | |
5919c913 | 291 | list = sp_list_append(list, name); |
4b97c9fc | 292 | skip: |
3b63f34d ML |
293 | udev_device_unref(ud_dev); |
294 | if (!list) | |
77f262c4 ML |
295 | { |
296 | ret = SP_ERR_MEM; | |
3b63f34d | 297 | goto out; |
77f262c4 | 298 | } |
3b63f34d ML |
299 | } |
300 | out: | |
301 | udev_enumerate_unref(ud_enumerate); | |
302 | udev_unref(ud); | |
3b63f34d | 303 | #endif |
77f262c4 ML |
304 | |
305 | if (ret == SP_OK) | |
306 | { | |
307 | *list_ptr = list; | |
308 | } | |
309 | else | |
310 | { | |
311 | if (list) | |
312 | sp_free_port_list(list); | |
313 | ||
314 | *list_ptr = NULL; | |
315 | } | |
316 | ||
317 | return ret; | |
3b63f34d ML |
318 | } |
319 | ||
68ab64cc ML |
320 | /** |
321 | * Free a port list returned by sp_list_ports. | |
322 | */ | |
d54e9004 | 323 | void sp_free_port_list(struct sp_port **list) |
3b63f34d ML |
324 | { |
325 | unsigned int i; | |
326 | for (i = 0; list[i]; i++) | |
e3b2f7a4 | 327 | sp_free_port(list[i]); |
3b63f34d ML |
328 | free(list); |
329 | } | |
330 | ||
74510d4b ML |
331 | static int sp_validate_port(struct sp_port *port) |
332 | { | |
333 | if (port == NULL) | |
334 | return 0; | |
335 | #ifdef _WIN32 | |
336 | if (port->hdl == INVALID_HANDLE_VALUE) | |
337 | return 0; | |
338 | #else | |
339 | if (port->fd < 0) | |
340 | return 0; | |
341 | #endif | |
342 | return 1; | |
343 | } | |
344 | ||
345 | #define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0) | |
346 | ||
347 | /** | |
348 | * Open the specified serial port. | |
349 | * | |
350 | * @param port Pointer to empty port structure allocated by caller. | |
351 | * @param portname Name of port to open. | |
352 | * @param flags Flags to use when opening the serial port. Possible flags | |
353 | * are: SP_MODE_RDWR, SP_MODE_RDONLY, SP_MODE_NONBLOCK. | |
354 | * | |
355 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
356 | * or SP_ERR_ARG if an invalid port or name is passed. | |
357 | */ | |
d54e9004 | 358 | int sp_open(struct sp_port *port, int flags) |
74510d4b ML |
359 | { |
360 | if (!port) | |
361 | return SP_ERR_ARG; | |
362 | ||
74510d4b ML |
363 | #ifdef _WIN32 |
364 | DWORD desired_access = 0, flags_and_attributes = 0; | |
365 | /* Map 'flags' to the OS-specific settings. */ | |
366 | desired_access |= GENERIC_READ; | |
367 | flags_and_attributes = FILE_ATTRIBUTE_NORMAL; | |
368 | if (flags & SP_MODE_RDWR) | |
369 | desired_access |= GENERIC_WRITE; | |
370 | if (flags & SP_MODE_NONBLOCK) | |
371 | flags_and_attributes |= FILE_FLAG_OVERLAPPED; | |
372 | ||
373 | port->hdl = CreateFile(port->name, desired_access, 0, 0, | |
374 | OPEN_EXISTING, flags_and_attributes, 0); | |
375 | if (port->hdl == INVALID_HANDLE_VALUE) | |
376 | return SP_ERR_FAIL; | |
377 | #else | |
378 | int flags_local = 0; | |
379 | /* Map 'flags' to the OS-specific settings. */ | |
380 | if (flags & SP_MODE_RDWR) | |
381 | flags_local |= O_RDWR; | |
382 | if (flags & SP_MODE_RDONLY) | |
383 | flags_local |= O_RDONLY; | |
384 | if (flags & SP_MODE_NONBLOCK) | |
385 | flags_local |= O_NONBLOCK; | |
386 | ||
387 | if ((port->fd = open(port->name, flags_local)) < 0) | |
388 | return SP_ERR_FAIL; | |
389 | #endif | |
390 | ||
391 | return SP_OK; | |
392 | } | |
393 | ||
394 | /** | |
395 | * Close the specified serial port. | |
396 | * | |
397 | * @param port Pointer to port structure. | |
398 | * | |
399 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
400 | * or SP_ERR_ARG if an invalid port is passed. | |
401 | */ | |
402 | int sp_close(struct sp_port *port) | |
403 | { | |
404 | CHECK_PORT(); | |
405 | ||
406 | #ifdef _WIN32 | |
407 | /* Returns non-zero upon success, 0 upon failure. */ | |
408 | if (CloseHandle(port->hdl) == 0) | |
409 | return SP_ERR_FAIL; | |
410 | #else | |
411 | /* Returns 0 upon success, -1 upon failure. */ | |
412 | if (close(port->fd) == -1) | |
413 | return SP_ERR_FAIL; | |
414 | #endif | |
415 | ||
416 | return SP_OK; | |
417 | } | |
418 | ||
419 | /** | |
420 | * Flush serial port buffers. | |
421 | * | |
422 | * @param port Pointer to port structure. | |
423 | * | |
424 | * @return SP_OK on success, SP_ERR_FAIL on failure, | |
425 | * or SP_ERR_ARG if an invalid port is passed. | |
426 | */ | |
427 | int sp_flush(struct sp_port *port) | |
428 | { | |
429 | CHECK_PORT(); | |
430 | ||
431 | #ifdef _WIN32 | |
432 | /* Returns non-zero upon success, 0 upon failure. */ | |
433 | if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0) | |
434 | return SP_ERR_FAIL; | |
435 | #else | |
436 | /* Returns 0 upon success, -1 upon failure. */ | |
437 | if (tcflush(port->fd, TCIOFLUSH) < 0) | |
438 | return SP_ERR_FAIL; | |
439 | #endif | |
440 | return SP_OK; | |
441 | } | |
442 | ||
443 | /** | |
444 | * Write a number of bytes to the specified serial port. | |
445 | * | |
446 | * @param port Pointer to port structure. | |
447 | * @param buf Buffer containing the bytes to write. | |
448 | * @param count Number of bytes to write. | |
449 | * | |
450 | * @return The number of bytes written, SP_ERR_FAIL on failure, | |
451 | * or SP_ERR_ARG if an invalid port is passed. | |
452 | */ | |
453 | int sp_write(struct sp_port *port, const void *buf, size_t count) | |
454 | { | |
455 | CHECK_PORT(); | |
456 | ||
457 | if (!buf) | |
458 | return SP_ERR_ARG; | |
459 | ||
460 | #ifdef _WIN32 | |
461 | DWORD written = 0; | |
462 | /* Returns non-zero upon success, 0 upon failure. */ | |
463 | if (WriteFile(port->hdl, buf, count, &written, NULL) == 0) | |
464 | return SP_ERR_FAIL; | |
465 | return written; | |
466 | #else | |
467 | /* Returns the number of bytes written, or -1 upon failure. */ | |
468 | ssize_t written = write(port->fd, buf, count); | |
469 | if (written < 0) | |
470 | return SP_ERR_FAIL; | |
471 | else | |
472 | return written;; | |
473 | #endif | |
474 | } | |
475 | ||
476 | /** | |
477 | * Read a number of bytes from the specified serial port. | |
478 | * | |
479 | * @param port Pointer to port structure. | |
480 | * @param buf Buffer where to store the bytes that are read. | |
481 | * @param count The number of bytes to read. | |
482 | * | |
483 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
484 | * or SP_ERR_ARG if an invalid port is passed. | |
485 | */ | |
486 | int sp_read(struct sp_port *port, void *buf, size_t count) | |
487 | { | |
488 | CHECK_PORT(); | |
489 | ||
490 | if (!buf) | |
491 | return SP_ERR_ARG; | |
492 | ||
493 | #ifdef _WIN32 | |
494 | DWORD bytes_read = 0; | |
495 | /* Returns non-zero upon success, 0 upon failure. */ | |
496 | if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0) | |
497 | return SP_ERR_FAIL; | |
498 | return bytes_read; | |
499 | #else | |
500 | ssize_t bytes_read; | |
501 | /* Returns the number of bytes read, or -1 upon failure. */ | |
502 | if ((bytes_read = read(port->fd, buf, count)) < 0) | |
503 | return SP_ERR_FAIL; | |
504 | return bytes_read; | |
505 | #endif | |
506 | } | |
507 | ||
508 | /** | |
509 | * Set serial parameters for the specified serial port. | |
510 | * | |
511 | * @param port Pointer to port structure. | |
512 | * @param baudrate The baudrate to set. | |
513 | * @param bits The number of data bits to use. | |
514 | * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). | |
515 | * @param stopbits The number of stop bits to use (1 or 2). | |
516 | * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, | |
517 | * 2 = XON/XOFF). | |
518 | * | |
519 | * @return The number of bytes read, SP_ERR_FAIL on failure, | |
520 | * or SP_ERR_ARG if an invalid argument is passed. | |
521 | */ | |
522 | int sp_set_params(struct sp_port *port, int baudrate, | |
523 | int bits, int parity, int stopbits, | |
524 | int flowcontrol, int rts, int dtr) | |
525 | { | |
526 | CHECK_PORT(); | |
527 | ||
528 | #ifdef _WIN32 | |
529 | DCB dcb; | |
530 | ||
531 | if (!GetCommState(port->hdl, &dcb)) | |
532 | return SP_ERR_FAIL; | |
533 | ||
534 | switch (baudrate) { | |
535 | /* | |
536 | * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to | |
537 | * have documented CBR_* macros. | |
538 | */ | |
539 | case 110: | |
540 | dcb.BaudRate = CBR_110; | |
541 | break; | |
542 | case 300: | |
543 | dcb.BaudRate = CBR_300; | |
544 | break; | |
545 | case 600: | |
546 | dcb.BaudRate = CBR_600; | |
547 | break; | |
548 | case 1200: | |
549 | dcb.BaudRate = CBR_1200; | |
550 | break; | |
551 | case 2400: | |
552 | dcb.BaudRate = CBR_2400; | |
553 | break; | |
554 | case 4800: | |
555 | dcb.BaudRate = CBR_4800; | |
556 | break; | |
557 | case 9600: | |
558 | dcb.BaudRate = CBR_9600; | |
559 | break; | |
560 | case 14400: | |
561 | dcb.BaudRate = CBR_14400; /* Not available on Unix? */ | |
562 | break; | |
563 | case 19200: | |
564 | dcb.BaudRate = CBR_19200; | |
565 | break; | |
566 | case 38400: | |
567 | dcb.BaudRate = CBR_38400; | |
568 | break; | |
569 | case 57600: | |
570 | dcb.BaudRate = CBR_57600; | |
571 | break; | |
572 | case 115200: | |
573 | dcb.BaudRate = CBR_115200; | |
574 | break; | |
575 | case 128000: | |
576 | dcb.BaudRate = CBR_128000; /* Not available on Unix? */ | |
577 | break; | |
578 | case 256000: | |
579 | dcb.BaudRate = CBR_256000; /* Not available on Unix? */ | |
580 | break; | |
581 | default: | |
582 | return SP_ERR_ARG; | |
583 | } | |
584 | ||
585 | switch (stopbits) { | |
586 | /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */ | |
587 | case 1: | |
588 | dcb.StopBits = ONESTOPBIT; | |
589 | break; | |
590 | case 2: | |
591 | dcb.StopBits = TWOSTOPBITS; | |
592 | break; | |
593 | default: | |
594 | return SP_ERR_ARG; | |
595 | } | |
596 | ||
597 | switch (parity) { | |
598 | /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */ | |
599 | case SP_PARITY_NONE: | |
600 | dcb.Parity = NOPARITY; | |
601 | break; | |
602 | case SP_PARITY_EVEN: | |
603 | dcb.Parity = EVENPARITY; | |
604 | break; | |
605 | case SP_PARITY_ODD: | |
606 | dcb.Parity = ODDPARITY; | |
607 | break; | |
608 | default: | |
609 | return SP_ERR_ARG; | |
610 | } | |
611 | ||
612 | if (rts != -1) { | |
613 | if (rts) | |
614 | dcb.fRtsControl = RTS_CONTROL_ENABLE; | |
615 | else | |
616 | dcb.fRtsControl = RTS_CONTROL_DISABLE; | |
617 | } | |
618 | ||
619 | if (dtr != -1) { | |
620 | if (dtr) | |
621 | dcb.fDtrControl = DTR_CONTROL_ENABLE; | |
622 | else | |
623 | dcb.fDtrControl = DTR_CONTROL_DISABLE; | |
624 | } | |
625 | ||
626 | if (!SetCommState(port->hdl, &dcb)) | |
627 | return SP_ERR_FAIL; | |
628 | #else | |
629 | struct termios term; | |
630 | speed_t baud; | |
631 | int controlbits; | |
632 | ||
633 | if (tcgetattr(port->fd, &term) < 0) | |
634 | return SP_ERR_FAIL; | |
635 | ||
636 | switch (baudrate) { | |
637 | case 50: | |
638 | baud = B50; | |
639 | break; | |
640 | case 75: | |
641 | baud = B75; | |
642 | break; | |
643 | case 110: | |
644 | baud = B110; | |
645 | break; | |
646 | case 134: | |
647 | baud = B134; | |
648 | break; | |
649 | case 150: | |
650 | baud = B150; | |
651 | break; | |
652 | case 200: | |
653 | baud = B200; | |
654 | break; | |
655 | case 300: | |
656 | baud = B300; | |
657 | break; | |
658 | case 600: | |
659 | baud = B600; | |
660 | break; | |
661 | case 1200: | |
662 | baud = B1200; | |
663 | break; | |
664 | case 1800: | |
665 | baud = B1800; | |
666 | break; | |
667 | case 2400: | |
668 | baud = B2400; | |
669 | break; | |
670 | case 4800: | |
671 | baud = B4800; | |
672 | break; | |
673 | case 9600: | |
674 | baud = B9600; | |
675 | break; | |
676 | case 19200: | |
677 | baud = B19200; | |
678 | break; | |
679 | case 38400: | |
680 | baud = B38400; | |
681 | break; | |
682 | case 57600: | |
683 | baud = B57600; | |
684 | break; | |
685 | case 115200: | |
686 | baud = B115200; | |
687 | break; | |
688 | case 230400: | |
689 | baud = B230400; | |
690 | break; | |
691 | #if !defined(__APPLE__) && !defined(__OpenBSD__) | |
692 | case 460800: | |
693 | baud = B460800; | |
694 | break; | |
695 | #endif | |
696 | default: | |
697 | return SP_ERR_ARG; | |
698 | } | |
699 | ||
700 | if (cfsetospeed(&term, baud) < 0) | |
701 | return SP_ERR_FAIL; | |
702 | ||
703 | if (cfsetispeed(&term, baud) < 0) | |
704 | return SP_ERR_FAIL; | |
705 | ||
706 | term.c_cflag &= ~CSIZE; | |
707 | switch (bits) { | |
708 | case 8: | |
709 | term.c_cflag |= CS8; | |
710 | break; | |
711 | case 7: | |
712 | term.c_cflag |= CS7; | |
713 | break; | |
714 | default: | |
715 | return SP_ERR_ARG; | |
716 | } | |
717 | ||
718 | term.c_cflag &= ~CSTOPB; | |
719 | switch (stopbits) { | |
720 | case 1: | |
721 | term.c_cflag &= ~CSTOPB; | |
722 | break; | |
723 | case 2: | |
724 | term.c_cflag |= CSTOPB; | |
725 | break; | |
726 | default: | |
727 | return SP_ERR_ARG; | |
728 | } | |
729 | ||
8683177b | 730 | term.c_iflag &= ~(IXON | IXOFF | IXANY); |
74510d4b ML |
731 | term.c_cflag &= ~CRTSCTS; |
732 | switch (flowcontrol) { | |
733 | case 0: | |
734 | /* No flow control. */ | |
735 | break; | |
736 | case 1: | |
737 | term.c_cflag |= CRTSCTS; | |
738 | break; | |
739 | case 2: | |
8683177b | 740 | term.c_iflag |= IXON | IXOFF | IXANY; |
74510d4b ML |
741 | break; |
742 | default: | |
743 | return SP_ERR_ARG; | |
744 | } | |
745 | ||
746 | term.c_iflag &= ~IGNPAR; | |
8683177b | 747 | term.c_cflag &= ~(PARENB | PARODD); |
74510d4b ML |
748 | switch (parity) { |
749 | case SP_PARITY_NONE: | |
750 | term.c_iflag |= IGNPAR; | |
751 | break; | |
752 | case SP_PARITY_EVEN: | |
753 | term.c_cflag |= PARENB; | |
754 | break; | |
755 | case SP_PARITY_ODD: | |
756 | term.c_cflag |= PARENB | PARODD; | |
757 | break; | |
758 | default: | |
759 | return SP_ERR_ARG; | |
760 | } | |
761 | ||
762 | /* Turn off all serial port cooking. */ | |
763 | term.c_iflag &= ~(ISTRIP | INLCR | ICRNL); | |
764 | term.c_oflag &= ~(ONLCR | OCRNL | ONOCR); | |
765 | #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__) | |
766 | term.c_oflag &= ~OFILL; | |
767 | #endif | |
768 | ||
769 | /* Disable canonical mode, and don't echo input characters. */ | |
770 | term.c_lflag &= ~(ICANON | ECHO); | |
771 | ||
8683177b ML |
772 | /* Ignore modem status lines; enable receiver */ |
773 | term.c_cflag |= (CLOCAL | CREAD); | |
774 | ||
74510d4b ML |
775 | /* Write the configured settings. */ |
776 | if (tcsetattr(port->fd, TCSADRAIN, &term) < 0) | |
777 | return SP_ERR_FAIL; | |
778 | ||
779 | if (rts != -1) { | |
780 | controlbits = TIOCM_RTS; | |
781 | if (ioctl(port->fd, rts ? TIOCMBIS : TIOCMBIC, | |
782 | &controlbits) < 0) | |
783 | return SP_ERR_FAIL; | |
784 | } | |
785 | ||
786 | if (dtr != -1) { | |
787 | controlbits = TIOCM_DTR; | |
788 | if (ioctl(port->fd, dtr ? TIOCMBIS : TIOCMBIC, | |
789 | &controlbits) < 0) | |
790 | return SP_ERR_FAIL; | |
791 | } | |
792 | #endif | |
793 | ||
794 | return SP_OK; | |
795 | } | |
796 | ||
797 | /** | |
798 | * Get error code for failed operation. | |
799 | * | |
800 | * In order to obtain the correct result, this function should be called | |
801 | * straight after the failure, before executing any other system operations. | |
802 | * | |
803 | * @return The system's numeric code for the error that caused the last | |
804 | * operation to fail. | |
805 | */ | |
806 | int sp_last_error_code(void) | |
807 | { | |
808 | #ifdef _WIN32 | |
809 | return GetLastError(); | |
810 | #else | |
811 | return errno; | |
812 | #endif | |
813 | } | |
814 | ||
815 | /** | |
816 | * Get error message for failed operation. | |
817 | * | |
818 | * In order to obtain the correct result, this function should be called | |
819 | * straight after the failure, before executing other system operations. | |
820 | * | |
821 | * @return The system's message for the error that caused the last | |
822 | * operation to fail. This string may be allocated by the function, | |
823 | * and can be freed after use by calling sp_free_error_message. | |
824 | */ | |
825 | char *sp_last_error_message(void) | |
826 | { | |
827 | #ifdef _WIN32 | |
828 | LPVOID message; | |
829 | DWORD error = GetLastError(); | |
830 | ||
831 | FormatMessage( | |
832 | FORMAT_MESSAGE_ALLOCATE_BUFFER | | |
833 | FORMAT_MESSAGE_FROM_SYSTEM | | |
834 | FORMAT_MESSAGE_IGNORE_INSERTS, | |
835 | NULL, | |
836 | error, | |
837 | MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), | |
838 | (LPTSTR) &message, | |
839 | 0, NULL ); | |
840 | ||
841 | return message; | |
842 | #else | |
843 | return strerror(errno); | |
844 | #endif | |
845 | } | |
846 | ||
847 | /** | |
848 | * Free error message. | |
849 | * | |
850 | * This function can be used to free a string returned by the | |
851 | * sp_last_error_message function. | |
852 | */ | |
853 | void sp_free_error_message(char *message) | |
854 | { | |
855 | #ifdef _WIN32 | |
856 | LocalFree(message); | |
64eec30d ML |
857 | #else |
858 | (void)message; | |
74510d4b ML |
859 | #endif |
860 | } |