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)
513 /* Returns non-zero upon success, 0 upon failure. */
514 if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0)
517 /* Returns 0 upon success, -1 upon failure. */
518 if (tcflush(port->fd, TCIOFLUSH) < 0)
524 enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count)
534 /* Returns non-zero upon success, 0 upon failure. */
535 if (WriteFile(port->hdl, buf, count, &written, NULL) == 0)
539 /* Returns the number of bytes written, or -1 upon failure. */
540 ssize_t written = write(port->fd, buf, count);
549 enum sp_return sp_read(struct sp_port *port, void *buf, size_t count)
557 DWORD bytes_read = 0;
559 /* Returns non-zero upon success, 0 upon failure. */
560 if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0)
566 /* Returns the number of bytes read, or -1 upon failure. */
567 if ((bytes_read = read(port->fd, buf, count)) < 0)
574 static enum sp_return get_baudrate(int fd, int *baudrate)
578 if (!(data = malloc(get_termios_size())))
581 if (ioctl(fd, get_termios_get_ioctl(), data) < 0)
584 *baudrate = get_termios_speed(data);
589 static enum sp_return set_baudrate(int fd, int baudrate)
593 if (!(data = malloc(get_termios_size())))
596 if (ioctl(fd, get_termios_get_ioctl(), data) < 0)
599 set_termios_speed(data, baudrate);
601 if (ioctl(fd, get_termios_set_ioctl(), data) < 0)
608 static enum sp_return get_flow(int fd, int *flow)
612 if (!(data = malloc(get_termiox_size())))
615 if (ioctl(fd, TCGETX, data) < 0)
618 *flow = get_termiox_flow(data);
623 static enum sp_return set_flow(int fd, int flow)
627 if (!(data = malloc(get_termiox_size())))
630 if (ioctl(fd, TCGETX, data) < 0)
633 set_termiox_flow(data, flow);
635 if (ioctl(fd, TCSETX, data) < 0)
640 #endif /* USE_TERMIOX */
641 #endif /* __linux__ */
643 static enum sp_return get_config(struct sp_port *port, struct port_data *data,
644 struct sp_port_config *config)
649 if (!GetCommState(port->hdl, &data->dcb))
652 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
653 if (data->dcb.BaudRate == std_baudrates[i].index) {
654 config->baudrate = std_baudrates[i].value;
659 if (i == NUM_STD_BAUDRATES)
660 /* BaudRate field can be either an index or a custom baud rate. */
661 config->baudrate = data->dcb.BaudRate;
663 config->bits = data->dcb.ByteSize;
665 if (data->dcb.fParity)
666 switch (data->dcb.Parity) {
668 config->parity = SP_PARITY_NONE;
671 config->parity = SP_PARITY_EVEN;
674 config->parity = SP_PARITY_ODD;
680 config->parity = SP_PARITY_NONE;
682 switch (data->dcb.StopBits) {
684 config->stopbits = 1;
687 config->stopbits = 2;
690 config->stopbits = -1;
693 switch (data->dcb.fRtsControl) {
694 case RTS_CONTROL_DISABLE:
695 config->rts = SP_RTS_OFF;
697 case RTS_CONTROL_ENABLE:
698 config->rts = SP_RTS_ON;
700 case RTS_CONTROL_HANDSHAKE:
701 config->rts = SP_RTS_FLOW_CONTROL;
707 config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
709 switch (data->dcb.fDtrControl) {
710 case DTR_CONTROL_DISABLE:
711 config->dtr = SP_DTR_OFF;
713 case DTR_CONTROL_ENABLE:
714 config->dtr = SP_DTR_ON;
716 case DTR_CONTROL_HANDSHAKE:
717 config->dtr = SP_DTR_FLOW_CONTROL;
723 config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
725 if (data->dcb.fInX) {
727 config->xon_xoff = SP_XONXOFF_INOUT;
729 config->xon_xoff = SP_XONXOFF_IN;
732 config->xon_xoff = SP_XONXOFF_OUT;
734 config->xon_xoff = SP_XONXOFF_DISABLED;
739 if (tcgetattr(port->fd, &data->term) < 0)
742 if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
746 TRY(get_flow(port->fd, &data->flow));
749 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
750 if (cfgetispeed(&data->term) == std_baudrates[i].index) {
751 config->baudrate = std_baudrates[i].value;
756 if (i == NUM_STD_BAUDRATES) {
758 config->baudrate = (int)data->term.c_ispeed;
759 #elif defined(__linux__)
760 TRY(get_baudrate(port->fd, &config->baudrate));
762 config->baudrate = -1;
766 switch (data->term.c_cflag & CSIZE) {
783 if (!(data->term.c_cflag & PARENB) && (data->term.c_iflag & IGNPAR))
784 config->parity = SP_PARITY_NONE;
785 else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
788 config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
790 config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
792 if (data->term.c_cflag & CRTSCTS) {
793 config->rts = SP_RTS_FLOW_CONTROL;
794 config->cts = SP_CTS_FLOW_CONTROL;
797 if (data->flow & RTS_FLOW)
798 config->rts = SP_RTS_FLOW_CONTROL;
800 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
802 config->cts = (data->flow & CTS_FLOW) ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
804 config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
805 config->cts = SP_CTS_IGNORE;
810 if (data->flow & DTR_FLOW)
811 config->dtr = SP_DTR_FLOW_CONTROL;
813 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
815 config->dsr = (data->flow & DSR_FLOW) ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
817 config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
818 config->dsr = SP_DSR_IGNORE;
821 if (data->term.c_iflag & IXOFF) {
822 if (data->term.c_iflag & IXON)
823 config->xon_xoff = SP_XONXOFF_INOUT;
825 config->xon_xoff = SP_XONXOFF_IN;
827 if (data->term.c_iflag & IXON)
828 config->xon_xoff = SP_XONXOFF_OUT;
830 config->xon_xoff = SP_XONXOFF_DISABLED;
837 static enum sp_return set_config(struct sp_port *port, struct port_data *data,
838 const struct sp_port_config *config)
842 BAUD_TYPE baud_nonstd;
851 if (config->baudrate >= 0) {
852 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
853 if (config->baudrate == std_baudrates[i].value) {
854 data->dcb.BaudRate = std_baudrates[i].index;
859 if (i == NUM_STD_BAUDRATES)
860 data->dcb.BaudRate = config->baudrate;
863 if (config->bits >= 0)
864 data->dcb.ByteSize = config->bits;
866 if (config->parity >= 0) {
867 switch (config->parity) {
868 /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
870 data->dcb.Parity = NOPARITY;
873 data->dcb.Parity = EVENPARITY;
876 data->dcb.Parity = ODDPARITY;
883 if (config->stopbits >= 0) {
884 switch (config->stopbits) {
885 /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
887 data->dcb.StopBits = ONESTOPBIT;
890 data->dcb.StopBits = TWOSTOPBITS;
897 if (config->rts >= 0) {
898 switch (config->rts) {
900 data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
903 data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
905 case SP_RTS_FLOW_CONTROL:
906 data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
913 if (config->cts >= 0) {
914 switch (config->cts) {
916 data->dcb.fOutxCtsFlow = FALSE;
918 case SP_CTS_FLOW_CONTROL:
919 data->dcb.fOutxCtsFlow = TRUE;
926 if (config->dtr >= 0) {
927 switch (config->dtr) {
929 data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
932 data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
934 case SP_DTR_FLOW_CONTROL:
935 data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
942 if (config->dsr >= 0) {
943 switch (config->dsr) {
945 data->dcb.fOutxDsrFlow = FALSE;
947 case SP_DSR_FLOW_CONTROL:
948 data->dcb.fOutxDsrFlow = TRUE;
955 if (config->xon_xoff >= 0) {
956 switch (config->xon_xoff) {
957 case SP_XONXOFF_DISABLED:
958 data->dcb.fInX = FALSE;
959 data->dcb.fOutX = FALSE;
962 data->dcb.fInX = TRUE;
963 data->dcb.fOutX = FALSE;
966 data->dcb.fInX = FALSE;
967 data->dcb.fOutX = TRUE;
969 case SP_XONXOFF_INOUT:
970 data->dcb.fInX = TRUE;
971 data->dcb.fOutX = TRUE;
978 if (!SetCommState(port->hdl, &data->dcb))
985 if (config->baudrate >= 0) {
986 for (i = 0; i < NUM_STD_BAUDRATES; i++) {
987 if (config->baudrate == std_baudrates[i].value) {
988 if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
991 if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
997 /* Non-standard baud rate */
998 if (i == NUM_STD_BAUDRATES) {
1000 /* Set "dummy" baud rate */
1001 if (cfsetspeed(&data->term, B9600) < 0)
1003 baud_nonstd = config->baudrate;
1004 #elif defined(__linux__)
1012 if (config->bits >= 0) {
1013 data->term.c_cflag &= ~CSIZE;
1014 switch (config->bits) {
1016 data->term.c_cflag |= CS8;
1019 data->term.c_cflag |= CS7;
1022 data->term.c_cflag |= CS6;
1025 data->term.c_cflag |= CS5;
1032 if (config->parity >= 0) {
1033 data->term.c_iflag &= ~IGNPAR;
1034 data->term.c_cflag &= ~(PARENB | PARODD);
1035 switch (config->parity) {
1036 case SP_PARITY_NONE:
1037 data->term.c_iflag |= IGNPAR;
1039 case SP_PARITY_EVEN:
1040 data->term.c_cflag |= PARENB;
1043 data->term.c_cflag |= PARENB | PARODD;
1050 if (config->stopbits >= 0) {
1051 data->term.c_cflag &= ~CSTOPB;
1052 switch (config->stopbits) {
1054 data->term.c_cflag &= ~CSTOPB;
1057 data->term.c_cflag |= CSTOPB;
1064 if (config->rts >= 0 || config->cts >= 0) {
1066 data->flow &= ~(RTS_FLOW | CTS_FLOW);
1067 switch (config->rts) {
1070 controlbits = TIOCM_RTS;
1071 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1075 case SP_RTS_FLOW_CONTROL:
1076 data->flow |= RTS_FLOW;
1081 if (config->cts == SP_CTS_FLOW_CONTROL)
1082 data->flow |= CTS_FLOW;
1084 if (data->flow & (RTS_FLOW | CTS_FLOW))
1085 data->term.c_iflag |= CRTSCTS;
1087 data->term.c_iflag &= ~CRTSCTS;
1089 /* Asymmetric use of RTS/CTS not supported. */
1090 if (data->term.c_iflag & CRTSCTS) {
1091 /* Flow control can only be disabled for both RTS & CTS together. */
1092 if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
1093 if (config->cts != SP_CTS_IGNORE)
1096 if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
1097 if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
1101 /* Flow control can only be enabled for both RTS & CTS together. */
1102 if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
1103 ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
1107 if (config->rts >= 0) {
1108 if (config->rts == SP_RTS_FLOW_CONTROL) {
1109 data->term.c_iflag |= CRTSCTS;
1111 controlbits = TIOCM_RTS;
1112 if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
1120 if (config->dtr >= 0 || config->dsr >= 0) {
1122 data->flow &= ~(DTR_FLOW | DSR_FLOW);
1123 switch (config->dtr) {
1126 controlbits = TIOCM_DTR;
1127 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1131 case SP_DTR_FLOW_CONTROL:
1132 data->flow |= DTR_FLOW;
1137 if (config->dsr == SP_DSR_FLOW_CONTROL)
1138 data->flow |= DSR_FLOW;
1140 /* DTR/DSR flow control not supported. */
1141 if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
1144 if (config->dtr >= 0) {
1145 controlbits = TIOCM_DTR;
1146 if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
1153 if (config->xon_xoff >= 0) {
1154 data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
1155 switch (config->xon_xoff) {
1156 case SP_XONXOFF_DISABLED:
1159 data->term.c_iflag |= IXOFF;
1161 case SP_XONXOFF_OUT:
1162 data->term.c_iflag |= IXON | IXANY;
1164 case SP_XONXOFF_INOUT:
1165 data->term.c_iflag |= IXON | IXOFF | IXANY;
1172 if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
1176 if (baud_nonstd != B0) {
1177 if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
1179 /* Set baud rates in data->term to correct, but incompatible
1180 * with tcsetattr() value, same as delivered by tcgetattr(). */
1181 if (cfsetspeed(&data->term, baud_nonstd) < 0)
1184 #elif defined(__linux__)
1186 TRY(set_baudrate(port->fd, config->baudrate));
1188 TRY(set_flow(port->fd, data->flow));
1192 #endif /* !_WIN32 */
1197 enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
1199 struct port_data data;
1200 struct sp_port_config prev_config;
1207 TRY(get_config(port, &data, &prev_config));
1208 TRY(set_config(port, &data, config));
1213 #define CREATE_SETTER(x, type) int sp_set_##x(struct sp_port *port, type x) { \
1214 struct port_data data; \
1215 struct sp_port_config config; \
1217 TRY(get_config(port, &data, &config)); \
1219 TRY(set_config(port, &data, &config)); \
1223 CREATE_SETTER(baudrate, int)
1224 CREATE_SETTER(bits, int)
1225 CREATE_SETTER(parity, enum sp_parity)
1226 CREATE_SETTER(stopbits, int)
1227 CREATE_SETTER(rts, enum sp_rts)
1228 CREATE_SETTER(cts, enum sp_cts)
1229 CREATE_SETTER(dtr, enum sp_dtr)
1230 CREATE_SETTER(dsr, enum sp_dsr)
1231 CREATE_SETTER(xon_xoff, enum sp_xonxoff)
1233 enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
1235 struct port_data data;
1236 struct sp_port_config config;
1240 TRY(get_config(port, &data, &config));
1242 if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
1243 config.xon_xoff = SP_XONXOFF_INOUT;
1245 config.xon_xoff = SP_XONXOFF_DISABLED;
1247 if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
1248 config.rts = SP_RTS_FLOW_CONTROL;
1249 config.cts = SP_CTS_FLOW_CONTROL;
1251 if (config.rts == SP_RTS_FLOW_CONTROL)
1252 config.rts = SP_RTS_ON;
1253 config.cts = SP_CTS_IGNORE;
1256 if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
1257 config.dtr = SP_DTR_FLOW_CONTROL;
1258 config.dsr = SP_DSR_FLOW_CONTROL;
1260 if (config.dtr == SP_DTR_FLOW_CONTROL)
1261 config.dtr = SP_DTR_ON;
1262 config.dsr = SP_DSR_IGNORE;
1265 TRY(set_config(port, &data, &config));
1270 int sp_last_error_code(void)
1273 return GetLastError();
1279 char *sp_last_error_message(void)
1283 DWORD error = GetLastError();
1286 FORMAT_MESSAGE_ALLOCATE_BUFFER |
1287 FORMAT_MESSAGE_FROM_SYSTEM |
1288 FORMAT_MESSAGE_IGNORE_INSERTS,
1291 MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
1297 return strerror(errno);
1301 void sp_free_error_message(char *message)