2 * This file is part of the libserialport project.
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 * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
9 * This program is free software: you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as
11 * published by the Free Software Foundation, either version 3 of the
12 * License, or (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this program. If not, see <http://www.gnu.org/licenses/>.
24 #include <sys/types.h>
36 #include <sys/ioctl.h>
39 #include <IOKit/IOKitLib.h>
40 #include <IOKit/serial/IOSerialKeys.h>
41 #include <IOKit/serial/ioss.h>
42 #include <sys/syslimits.h>
46 #include "linux/serial.h"
47 #include "linux_termios.h"
48 #if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
53 #include "libserialport.h"
67 /* Standard baud rates. */
69 #define BAUD_TYPE DWORD
70 #define BAUD(n) {CBR_##n, n}
72 #define BAUD_TYPE speed_t
73 #define BAUD(n) {B##n, n}
81 const struct std_baudrate std_baudrates[] = {
84 * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
85 * have documented CBR_* macros.
87 BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
88 BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
89 BAUD(115200), BAUD(128000), BAUD(256000),
91 BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200),
92 BAUD(300), BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800),
93 BAUD(9600), BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200),
95 #if !defined(__APPLE__) && !defined(__OpenBSD__)
101 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
102 #define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
104 #define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
106 /* Helper functions. */
107 static enum sp_return validate_port(struct sp_port *port);
108 static struct sp_port **list_append(struct sp_port **list, const char *portname);
109 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
110 struct sp_port_config *config);
111 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
112 const struct sp_port_config *config);
114 enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
116 struct sp_port *port;
127 if (!(port = malloc(sizeof(struct sp_port))))
130 len = strlen(portname) + 1;
132 if (!(port->name = malloc(len))) {
137 memcpy(port->name, portname, len);
140 port->hdl = INVALID_HANDLE_VALUE;
150 enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
157 if (!port || !port->name)
160 return sp_get_port_by_name(port->name, copy_ptr);
163 void sp_free_port(struct sp_port *port)
174 static struct sp_port **list_append(struct sp_port **list, const char *portname)
179 for (count = 0; list[count]; count++);
180 if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
183 if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
185 list[count + 1] = NULL;
189 sp_free_port_list(list);
193 enum sp_return sp_list_ports(struct sp_port ***list_ptr)
195 struct sp_port **list;
198 if (!(list = malloc(sizeof(struct sp_port **))))
206 DWORD max_value_len, max_data_size, max_data_len;
207 DWORD value_len, data_size, data_len;
208 DWORD type, index = 0;
212 if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
213 0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS) {
217 if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
218 &max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS) {
222 max_data_len = max_data_size / sizeof(TCHAR);
223 if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR)))) {
227 if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR)))) {
232 value_len = max_value_len + 1,
233 data_size = max_data_size,
234 RegEnumValue(key, index, value, &value_len,
235 NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
237 data_len = data_size / sizeof(TCHAR);
238 data[data_len] = '\0';
240 name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL)
242 name_len = data_len + 1;
244 if (!(name = malloc(name_len))) {
249 WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
253 if (type == REG_SZ && !(list = list_append(list, name))) {
269 CFMutableDictionaryRef classes;
276 if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS) {
281 if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue))) {
286 CFDictionarySetValue(classes,
287 CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
289 if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS) {
294 if (!(path = malloc(PATH_MAX))) {
299 while ((port = IOIteratorNext(iter))) {
300 cf_path = IORegistryEntryCreateCFProperty(port,
301 CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
303 result = CFStringGetCString(cf_path,
304 path, PATH_MAX, kCFStringEncodingASCII);
306 if (result && !(list = list_append(list, path))) {
308 IOObjectRelease(port);
312 IOObjectRelease(port);
317 IOObjectRelease(iter);
322 struct udev_enumerate *ud_enumerate;
323 struct udev_list_entry *ud_list;
324 struct udev_list_entry *ud_entry;
326 struct udev_device *ud_dev, *ud_parent;
329 int fd, ioctl_result;
330 struct serial_struct serial_info;
333 ud_enumerate = udev_enumerate_new(ud);
334 udev_enumerate_add_match_subsystem(ud_enumerate, "tty");
335 udev_enumerate_scan_devices(ud_enumerate);
336 ud_list = udev_enumerate_get_list_entry(ud_enumerate);
337 udev_list_entry_foreach(ud_entry, ud_list) {
338 path = udev_list_entry_get_name(ud_entry);
339 ud_dev = udev_device_new_from_syspath(ud, path);
340 /* If there is no parent device, this is a virtual tty. */
341 ud_parent = udev_device_get_parent(ud_dev);
342 if (ud_parent == NULL) {
343 udev_device_unref(ud_dev);
346 name = udev_device_get_devnode(ud_dev);
347 /* The serial8250 driver has a hardcoded number of ports.
348 * The only way to tell which actually exist on a given system
349 * is to try to open them and make an ioctl call. */
350 driver = udev_device_get_driver(ud_parent);
351 if (driver && !strcmp(driver, "serial8250")) {
352 if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0)
354 ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
356 if (ioctl_result != 0)
358 if (serial_info.type == PORT_UNKNOWN)
361 list = list_append(list, name);
363 udev_device_unref(ud_dev);
370 udev_enumerate_unref(ud_enumerate);
378 sp_free_port_list(list);
385 void sp_free_port_list(struct sp_port **list)
389 for (i = 0; list[i]; i++)
390 sp_free_port(list[i]);
394 static enum sp_return validate_port(struct sp_port *port)
399 if (port->hdl == INVALID_HANDLE_VALUE)
408 #define CHECK_PORT() do { if (!validate_port(port)) return SP_ERR_ARG; } while (0)
410 enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
416 DWORD desired_access = 0, flags_and_attributes = 0;
417 char *escaped_port_name;
419 /* Prefix port name with '\\.\' to work with ports above COM9. */
420 if (!(escaped_port_name = malloc(strlen(port->name + 5))))
422 sprintf(escaped_port_name, "\\\\.\\%s", port->name);
424 /* Map 'flags' to the OS-specific settings. */
425 flags_and_attributes = FILE_ATTRIBUTE_NORMAL;
426 if (flags & SP_MODE_READ)
427 desired_access |= GENERIC_READ;
428 if (flags & SP_MODE_WRITE)
429 desired_access |= GENERIC_WRITE;
430 if (flags & SP_MODE_NONBLOCK)
431 flags_and_attributes |= FILE_FLAG_OVERLAPPED;
433 port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
434 OPEN_EXISTING, flags_and_attributes, 0);
436 free(escaped_port_name);
438 if (port->hdl == INVALID_HANDLE_VALUE)
442 struct port_data data;
443 struct sp_port_config config;
446 /* Map 'flags' to the OS-specific settings. */
447 if (flags & (SP_MODE_READ | SP_MODE_WRITE))
448 flags_local |= O_RDWR;
449 else if (flags & SP_MODE_READ)
450 flags_local |= O_RDONLY;
451 else if (flags & SP_MODE_WRITE)
452 flags_local |= O_WRONLY;
453 if (flags & SP_MODE_NONBLOCK)
454 flags_local |= O_NONBLOCK;
456 if ((port->fd = open(port->name, flags_local)) < 0)
459 ret = get_config(port, &data, &config);
466 /* Turn off all serial port cooking. */
467 data.term.c_iflag &= ~(ISTRIP | INLCR | ICRNL);
468 data.term.c_oflag &= ~(ONLCR | OCRNL | ONOCR);
469 #if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
470 data.term.c_oflag &= ~OFILL;
472 /* Disable canonical mode, and don't echo input characters. */
473 data.term.c_lflag &= ~(ICANON | ECHO);
475 /* Ignore modem status lines; enable receiver */
476 data.term.c_cflag |= (CLOCAL | CREAD);
478 ret = set_config(port, &data, &config);
489 enum sp_return sp_close(struct sp_port *port)
494 /* Returns non-zero upon success, 0 upon failure. */
495 if (CloseHandle(port->hdl) == 0)
497 port->hdl = INVALID_HANDLE_VALUE;
499 /* Returns 0 upon success, -1 upon failure. */
500 if (close(port->fd) == -1)
508 enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
514 if (buffers & SP_BUF_INPUT)
515 flags |= PURGE_RXCLEAR;
516 if (buffers & SP_BUF_OUTPUT)
517 flags |= PURGE_TXCLEAR;
519 /* Returns non-zero upon success, 0 upon failure. */
520 if (PurgeComm(port->hdl, flags) == 0)
524 if (buffers & SP_BUF_BOTH)
526 else if (buffers & SP_BUF_INPUT)
528 if (buffers & SP_BUF_OUTPUT)
531 /* Returns 0 upon success, -1 upon failure. */
532 if (tcflush(port->fd, flags) < 0)
538 enum sp_return sp_drain(struct sp_port *port)
543 /* Returns non-zero upon success, 0 upon failure. */
544 if (FlushFileBuffers(port->hdl) == 0)
547 /* Returns 0 upon success, -1 upon failure. */
548 if (tcdrain(port->fd) < 0)
555 enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count)
565 /* Returns non-zero upon success, 0 upon failure. */
566 if (WriteFile(port->hdl, buf, count, &written, NULL) == 0)
570 /* Returns the number of bytes written, or -1 upon failure. */
571 ssize_t written = write(port->fd, buf, count);
580 enum sp_return sp_read(struct sp_port *port, void *buf, size_t count)
588 DWORD bytes_read = 0;
590 /* Returns non-zero upon success, 0 upon failure. */
591 if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0)
597 /* Returns the number of bytes read, or -1 upon failure. */
598 if ((bytes_read = read(port->fd, buf, count)) < 0)
605 static enum sp_return get_baudrate(int fd, int *baudrate)
609 if (!(data = malloc(get_termios_size())))
612 if (ioctl(fd, get_termios_get_ioctl(), data) < 0)
615 *baudrate = get_termios_speed(data);
620 static enum sp_return set_baudrate(int fd, int baudrate)
624 if (!(data = malloc(get_termios_size())))
627 if (ioctl(fd, get_termios_get_ioctl(), data) < 0)
630 set_termios_speed(data, baudrate);
632 if (ioctl(fd, get_termios_set_ioctl(), data) < 0)
639 static enum sp_return get_flow(int fd, int *flow)
643 if (!(data = malloc(get_termiox_size())))
646 if (ioctl(fd, TCGETX, data) < 0)
649 *flow = get_termiox_flow(data);
654 static enum sp_return set_flow(int fd, int flow)
658 if (!(data = malloc(get_termiox_size())))
661 if (ioctl(fd, TCGETX, data) < 0)
664 set_termiox_flow(data, flow);
666 if (ioctl(fd, TCSETX, data) < 0)
671 #endif /* USE_TERMIOX */
672 #endif /* __linux__ */
674 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
675 struct sp_port_config *config)
680 if (!GetCommState(port->hdl, &data->dcb))
683 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
684 if (data->dcb.BaudRate == std_baudrates[i].index) {
685 config->baudrate = std_baudrates[i].value;
690 if (i == NUM_STD_BAUDRATES)
691 /* BaudRate field can be either an index or a custom baud rate. */
692 config->baudrate = data->dcb.BaudRate;
694 config->bits = data->dcb.ByteSize;
696 if (data->dcb.fParity)
697 switch (data->dcb.Parity) {
699 config->parity = SP_PARITY_NONE;
702 config->parity = SP_PARITY_EVEN;
705 config->parity = SP_PARITY_ODD;
711 config->parity = SP_PARITY_NONE;
713 switch (data->dcb.StopBits) {
715 config->stopbits = 1;
718 config->stopbits = 2;
721 config->stopbits = -1;
724 switch (data->dcb.fRtsControl) {
725 case RTS_CONTROL_DISABLE:
726 config->rts = SP_RTS_OFF;
728 case RTS_CONTROL_ENABLE:
729 config->rts = SP_RTS_ON;
731 case RTS_CONTROL_HANDSHAKE:
732 config->rts = SP_RTS_FLOW_CONTROL;
738 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
740 switch (data->dcb.fDtrControl) {
741 case DTR_CONTROL_DISABLE:
742 config->dtr = SP_DTR_OFF;
744 case DTR_CONTROL_ENABLE:
745 config->dtr = SP_DTR_ON;
747 case DTR_CONTROL_HANDSHAKE:
748 config->dtr = SP_DTR_FLOW_CONTROL;
754 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
756 if (data->dcb.fInX) {
758 config->xon_xoff = SP_XONXOFF_INOUT;
760 config->xon_xoff = SP_XONXOFF_IN;
763 config->xon_xoff = SP_XONXOFF_OUT;
765 config->xon_xoff = SP_XONXOFF_DISABLED;
770 if (tcgetattr(port->fd, &data->term) < 0)
773 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
777 TRY(get_flow(port->fd, &data->flow));
780 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
781 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
782 config->baudrate = std_baudrates[i].value;
787 if (i == NUM_STD_BAUDRATES) {
789 config->baudrate = (int)data->term.c_ispeed;
790 #elif defined(__linux__)
791 TRY(get_baudrate(port->fd, &config->baudrate));
793 config->baudrate = -1;
797 switch (data->term.c_cflag & CSIZE) {
814 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
815 config->parity = SP_PARITY_NONE;
816 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
819 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
821 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
823 if (data->term.c_cflag & CRTSCTS) {
824 config->rts = SP_RTS_FLOW_CONTROL;
825 config->cts = SP_CTS_FLOW_CONTROL;
828 if (data->flow & RTS_FLOW)
829 config->rts = SP_RTS_FLOW_CONTROL;
831 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
833 config->cts = (data->flow & CTS_FLOW) ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
835 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
836 config->cts = SP_CTS_IGNORE;
841 if (data->flow & DTR_FLOW)
842 config->dtr = SP_DTR_FLOW_CONTROL;
844 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
846 config->dsr = (data->flow & DSR_FLOW) ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
848 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
849 config->dsr = SP_DSR_IGNORE;
852 if (data->term.c_iflag & IXOFF) {
853 if (data->term.c_iflag & IXON)
854 config->xon_xoff = SP_XONXOFF_INOUT;
856 config->xon_xoff = SP_XONXOFF_IN;
858 if (data->term.c_iflag & IXON)
859 config->xon_xoff = SP_XONXOFF_OUT;
861 config->xon_xoff = SP_XONXOFF_DISABLED;
868 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
869 const struct sp_port_config *config)
873 BAUD_TYPE baud_nonstd;
882 if (config->baudrate >= 0) {
883 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
884 if (config->baudrate == std_baudrates[i].value) {
885 data->dcb.BaudRate = std_baudrates[i].index;
890 if (i == NUM_STD_BAUDRATES)
891 data->dcb.BaudRate = config->baudrate;
894 if (config->bits >= 0)
895 data->dcb.ByteSize = config->bits;
897 if (config->parity >= 0) {
898 switch (config->parity) {
899 /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
901 data->dcb.Parity = NOPARITY;
904 data->dcb.Parity = EVENPARITY;
907 data->dcb.Parity = ODDPARITY;
914 if (config->stopbits >= 0) {
915 switch (config->stopbits) {
916 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
918 data->dcb.StopBits = ONESTOPBIT;
921 data->dcb.StopBits = TWOSTOPBITS;
928 if (config->rts >= 0) {
929 switch (config->rts) {
931 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
934 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
936 case SP_RTS_FLOW_CONTROL:
937 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
944 if (config->cts >= 0) {
945 switch (config->cts) {
947 data->dcb.fOutxCtsFlow = FALSE;
949 case SP_CTS_FLOW_CONTROL:
950 data->dcb.fOutxCtsFlow = TRUE;
957 if (config->dtr >= 0) {
958 switch (config->dtr) {
960 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
963 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
965 case SP_DTR_FLOW_CONTROL:
966 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
973 if (config->dsr >= 0) {
974 switch (config->dsr) {
976 data->dcb.fOutxDsrFlow = FALSE;
978 case SP_DSR_FLOW_CONTROL:
979 data->dcb.fOutxDsrFlow = TRUE;
986 if (config->xon_xoff >= 0) {
987 switch (config->xon_xoff) {
988 case SP_XONXOFF_DISABLED:
989 data->dcb.fInX = FALSE;
990 data->dcb.fOutX = FALSE;
993 data->dcb.fInX = TRUE;
994 data->dcb.fOutX = FALSE;
997 data->dcb.fInX = FALSE;
998 data->dcb.fOutX = TRUE;
1000 case SP_XONXOFF_INOUT:
1001 data->dcb.fInX = TRUE;
1002 data->dcb.fOutX = TRUE;
1009 if (!SetCommState(port->hdl, &data->dcb))
1016 if (config->baudrate >= 0) {
1017 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
1018 if (config->baudrate == std_baudrates[i].value) {
1019 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
1022 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
1028 /* Non-standard baud rate */
1029 if (i == NUM_STD_BAUDRATES) {
1031 /* Set "dummy" baud rate */
1032 if (cfsetspeed(&data->term, B9600) < 0)
1034 baud_nonstd = config->baudrate;
1035 #elif defined(__linux__)
1043 if (config->bits >= 0) {
1044 data->term.c_cflag &= ~CSIZE;
1045 switch (config->bits) {
1047 data->term.c_cflag |= CS8;
1050 data->term.c_cflag |= CS7;
1053 data->term.c_cflag |= CS6;
1056 data->term.c_cflag |= CS5;
1063 if (config->parity >= 0) {
1064 data->term.c_iflag &= ~IGNPAR;
1065 data->term.c_cflag &= ~(PARENB | PARODD);
1066 switch (config->parity) {
1067 case SP_PARITY_NONE:
1068 data->term.c_iflag |= IGNPAR;
1070 case SP_PARITY_EVEN:
1071 data->term.c_cflag |= PARENB;
1074 data->term.c_cflag |= PARENB | PARODD;
1081 if (config->stopbits >= 0) {
1082 data->term.c_cflag &= ~CSTOPB;
1083 switch (config->stopbits) {
1085 data->term.c_cflag &= ~CSTOPB;
1088 data->term.c_cflag |= CSTOPB;
1095 if (config->rts >= 0 || config->cts >= 0) {
1097 data->flow &= ~(RTS_FLOW | CTS_FLOW);
1098 switch (config->rts) {
1101 controlbits = TIOCM_RTS;
1102 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1106 case SP_RTS_FLOW_CONTROL:
1107 data->flow |= RTS_FLOW;
1112 if (config->cts == SP_CTS_FLOW_CONTROL)
1113 data->flow |= CTS_FLOW;
1115 if (data->flow & (RTS_FLOW | CTS_FLOW))
1116 data->term.c_iflag |= CRTSCTS;
1118 data->term.c_iflag &= ~CRTSCTS;
1120 /* Asymmetric use of RTS/CTS not supported. */
1121 if (data->term.c_iflag & CRTSCTS) {
1122 /* Flow control can only be disabled for both RTS & CTS together. */
1123 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1124 if (config->cts != SP_CTS_IGNORE)
1127 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1128 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1132 /* Flow control can only be enabled for both RTS & CTS together. */
1133 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1134 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1138 if (config->rts >= 0) {
1139 if (config->rts == SP_RTS_FLOW_CONTROL) {
1140 data->term.c_iflag |= CRTSCTS;
1142 controlbits = TIOCM_RTS;
1143 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1151 if (config->dtr >= 0 || config->dsr >= 0) {
1153 data->flow &= ~(DTR_FLOW | DSR_FLOW);
1154 switch (config->dtr) {
1157 controlbits = TIOCM_DTR;
1158 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1162 case SP_DTR_FLOW_CONTROL:
1163 data->flow |= DTR_FLOW;
1168 if (config->dsr == SP_DSR_FLOW_CONTROL)
1169 data->flow |= DSR_FLOW;
1171 /* DTR/DSR flow control not supported. */
1172 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1175 if (config->dtr >= 0) {
1176 controlbits = TIOCM_DTR;
1177 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1184 if (config->xon_xoff >= 0) {
1185 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1186 switch (config->xon_xoff) {
1187 case SP_XONXOFF_DISABLED:
1190 data->term.c_iflag |= IXOFF;
1192 case SP_XONXOFF_OUT:
1193 data->term.c_iflag |= IXON | IXANY;
1195 case SP_XONXOFF_INOUT:
1196 data->term.c_iflag |= IXON | IXOFF | IXANY;
1203 if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
1207 if (baud_nonstd != B0) {
1208 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
1210 /* Set baud rates in data->term to correct, but incompatible
1211 * with tcsetattr() value, same as delivered by tcgetattr(). */
1212 if (cfsetspeed(&data->term, baud_nonstd) < 0)
1215 #elif defined(__linux__)
1217 TRY(set_baudrate(port->fd, config->baudrate));
1219 TRY(set_flow(port->fd, data->flow));
1223 #endif /* !_WIN32 */
1228 enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
1230 struct port_data data;
1231 struct sp_port_config prev_config;
1238 TRY(get_config(port, &data, &prev_config));
1239 TRY(set_config(port, &data, config));
1244 #define CREATE_SETTER(x, type) int sp_set_##x(struct sp_port *port, type x) { \
1245 struct port_data data; \
1246 struct sp_port_config config; \
1248 TRY(get_config(port, &data, &config)); \
1250 TRY(set_config(port, &data, &config)); \
1254 CREATE_SETTER(baudrate, int)
1255 CREATE_SETTER(bits, int)
1256 CREATE_SETTER(parity, enum sp_parity)
1257 CREATE_SETTER(stopbits, int)
1258 CREATE_SETTER(rts, enum sp_rts)
1259 CREATE_SETTER(cts, enum sp_cts)
1260 CREATE_SETTER(dtr, enum sp_dtr)
1261 CREATE_SETTER(dsr, enum sp_dsr)
1262 CREATE_SETTER(xon_xoff, enum sp_xonxoff)
1264 enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
1266 struct port_data data;
1267 struct sp_port_config config;
1271 TRY(get_config(port, &data, &config));
1273 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
1274 config.xon_xoff = SP_XONXOFF_INOUT;
1276 config.xon_xoff = SP_XONXOFF_DISABLED;
1278 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
1279 config.rts = SP_RTS_FLOW_CONTROL;
1280 config.cts = SP_CTS_FLOW_CONTROL;
1282 if (config.rts == SP_RTS_FLOW_CONTROL)
1283 config.rts = SP_RTS_ON;
1284 config.cts = SP_CTS_IGNORE;
1287 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
1288 config.dtr = SP_DTR_FLOW_CONTROL;
1289 config.dsr = SP_DSR_FLOW_CONTROL;
1291 if (config.dtr == SP_DTR_FLOW_CONTROL)
1292 config.dtr = SP_DTR_ON;
1293 config.dsr = SP_DSR_IGNORE;
1296 TRY(set_config(port, &data, &config));
1301 enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signals)
1311 if (GetCommModemStatus(port->hdl, &bits) == 0)
1313 if (bits & MS_CTS_ON)
1314 *signals |= SP_SIG_CTS;
1315 if (bits & MS_DSR_ON)
1316 *signals |= SP_SIG_DSR;
1317 if (bits & MS_RING_ON)
1318 *signals |= SP_SIG_DCD;
1319 if (bits & MS_RLSD_ON)
1320 *signals |= SP_SIG_RI;
1323 if (ioctl(port->fd, TIOCMGET, &bits) < 0)
1325 if (bits & TIOCM_CTS)
1326 *signals |= SP_SIG_CTS;
1327 if (bits & TIOCM_DSR)
1328 *signals |= SP_SIG_DSR;
1329 if (bits & TIOCM_CAR)
1330 *signals |= SP_SIG_DCD;
1331 if (bits & TIOCM_RNG)
1332 *signals |= SP_SIG_RI;
1337 enum sp_return sp_start_break(struct sp_port *port)
1341 if (SetCommBreak(port->hdl) == 0)
1344 if (ioctl(port->fd, TIOCSBRK, 1) < 0)
1351 enum sp_return sp_end_break(struct sp_port *port)
1355 if (ClearCommBreak(port->hdl) == 0)
1358 if (ioctl(port->fd, TIOCCBRK, 1) < 0)
1365 int sp_last_error_code(void)
1368 return GetLastError();
1374 char *sp_last_error_message(void)
1378 DWORD error = GetLastError();
1381 FORMAT_MESSAGE_ALLOCATE_BUFFER |
1382 FORMAT_MESSAGE_FROM_SYSTEM |
1383 FORMAT_MESSAGE_IGNORE_INSERTS,
1386 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
1392 return strerror(errno);
1396 void sp_free_error_message(char *message)