1
0
mirror of git://sigrok.org/libserialport synced 2023-08-10 21:13:24 +03:00
libserialport/serialport.c

984 lines
21 KiB
C

/*
* This file is part of the libserialport project.
*
* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
* Copyright (C) 2010-2012 Uwe Hermann <uwe@hermann-uwe.de>
* Copyright (C) 2013 Martin Ling <martin-libserialport@earth.li>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#ifdef _WIN32
#include <windows.h>
#include <tchar.h>
#include <stdio.h>
#else
#include <termios.h>
#include <sys/ioctl.h>
#endif
#ifdef __APPLE__
#include <IOKit/IOKitLib.h>
#include <IOKit/serial/IOSerialKeys.h>
#include <sys/syslimits.h>
#endif
#ifdef __linux__
#include "libudev.h"
#include "linux/serial.h"
#endif
#include "libserialport.h"
struct sp_port_data {
#ifdef _WIN32
DCB dcb;
#else
struct termios term;
int controlbits;
int rts;
int cts;
int dtr;
int dsr;
#endif
};
/* Standard baud rates. */
#ifdef _WIN32
#define BAUD_TYPE DWORD
#define BAUD(n) {CBR_##n, n}
#else
#define BAUD_TYPE speed_t
#define BAUD(n) {B##n, n}
#endif
struct std_baudrate {
BAUD_TYPE index;
int value;
};
const struct std_baudrate std_baudrates[] = {
#ifdef _WIN32
/*
* The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
* have documented CBR_* macros.
*/
BAUD(110), BAUD(300), BAUD(600), BAUD(1200), BAUD(2400), BAUD(4800),
BAUD(9600), BAUD(14400), BAUD(19200), BAUD(38400), BAUD(57600),
BAUD(115200), BAUD(128000), BAUD(256000)
#else
BAUD(50), BAUD(75), BAUD(110), BAUD(134), BAUD(150), BAUD(200), BAUD(300),
BAUD(600), BAUD(1200), BAUD(1800), BAUD(2400), BAUD(4800), BAUD(9600),
BAUD(19200), BAUD(38400), BAUD(57600), BAUD(115200), BAUD(230400),
#if !defined(__APPLE__) && !defined(__OpenBSD__)
BAUD(460800)
#endif
#endif
};
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
/* Helper functions for configuring ports. */
static int start_config(struct sp_port *port, struct sp_port_data *data);
static int set_baudrate(struct sp_port_data *data, int baudrate);
static int set_bits(struct sp_port_data *data, int bits);
static int set_parity(struct sp_port_data *data, int parity);
static int set_stopbits(struct sp_port_data *data, int stopbits);
static int set_rts(struct sp_port_data *data, int rts);
static int set_cts(struct sp_port_data *data, int cts);
static int set_dtr(struct sp_port_data *data, int dtr);
static int set_dsr(struct sp_port_data *data, int dsr);
static int set_xon_xoff(struct sp_port_data *data, int xon_xoff);
static int apply_config(struct sp_port *port, struct sp_port_data *data);
int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
{
struct sp_port *port;
int len;
if (!port_ptr)
return SP_ERR_ARG;
*port_ptr = NULL;
if (!portname)
return SP_ERR_ARG;
if (!(port = malloc(sizeof(struct sp_port))))
return SP_ERR_MEM;
len = strlen(portname) + 1;
if (!(port->name = malloc(len)))
{
free(port);
return SP_ERR_MEM;
}
memcpy(port->name, portname, len);
*port_ptr = port;
return SP_OK;
}
int sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
{
if (!copy_ptr)
return SP_ERR_ARG;
*copy_ptr = NULL;
if (!port || !port->name)
return SP_ERR_ARG;
return sp_get_port_by_name(port->name, copy_ptr);
}
void sp_free_port(struct sp_port *port)
{
if (!port)
return;
if (port->name)
free(port->name);
free(port);
}
static struct sp_port **sp_list_append(struct sp_port **list, const char *portname)
{
void *tmp;
unsigned int count;
for (count = 0; list[count]; count++);
if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
goto fail;
list = tmp;
if (sp_get_port_by_name(portname, &list[count]) != SP_OK)
goto fail;
list[count + 1] = NULL;
return list;
fail:
sp_free_port_list(list);
return NULL;
}
int sp_list_ports(struct sp_port ***list_ptr)
{
struct sp_port **list;
int ret = SP_OK;
if (!(list = malloc(sizeof(struct sp_port **))))
return SP_ERR_MEM;
list[0] = NULL;
#ifdef _WIN32
HKEY key;
TCHAR *value, *data;
DWORD max_value_len, max_data_size, max_data_len;
DWORD value_len, data_size, data_len;
DWORD type, index = 0;
char *name;
int name_len;
if (RegOpenKeyEx(HKEY_LOCAL_MACHINE, _T("HARDWARE\\DEVICEMAP\\SERIALCOMM"),
0, KEY_QUERY_VALUE, &key) != ERROR_SUCCESS)
{
ret = SP_ERR_FAIL;
goto out_done;
}
if (RegQueryInfoKey(key, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
&max_value_len, &max_data_size, NULL, NULL) != ERROR_SUCCESS)
{
ret = SP_ERR_FAIL;
goto out_close;
}
max_data_len = max_data_size / sizeof(TCHAR);
if (!(value = malloc((max_value_len + 1) * sizeof(TCHAR))))
{
ret = SP_ERR_MEM;
goto out_close;
}
if (!(data = malloc((max_data_len + 1) * sizeof(TCHAR))))
{
ret = SP_ERR_MEM;
goto out_free_value;
}
while (
value_len = max_value_len + 1,
data_size = max_data_size,
RegEnumValue(key, index, value, &value_len,
NULL, &type, (LPBYTE)data, &data_size) == ERROR_SUCCESS)
{
data_len = data_size / sizeof(TCHAR);
data[data_len] = '\0';
#ifdef UNICODE
name_len = WideCharToMultiByte(CP_ACP, 0, data, -1, NULL, 0, NULL, NULL)
#else
name_len = data_len + 1;
#endif
if (!(name = malloc(name_len)))
{
ret = SP_ERR_MEM;
goto out;
}
#ifdef UNICODE
WideCharToMultiByte(CP_ACP, 0, data, -1, name, name_len, NULL, NULL);
#else
strcpy(name, data);
#endif
if (type == REG_SZ && !(list = sp_list_append(list, name)))
{
ret = SP_ERR_MEM;
goto out;
}
index++;
}
out:
free(data);
out_free_value:
free(value);
out_close:
RegCloseKey(key);
out_done:
#endif
#ifdef __APPLE__
mach_port_t master;
CFMutableDictionaryRef classes;
io_iterator_t iter;
char *path;
io_object_t port;
CFTypeRef cf_path;
Boolean result;
if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS)
{
ret = SP_ERR_FAIL;
goto out_done;
}
if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue)))
{
ret = SP_ERR_FAIL;
goto out_done;
}
CFDictionarySetValue(classes,
CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
if (IOServiceGetMatchingServices(master, classes, &iter) != KERN_SUCCESS)
{
ret = SP_ERR_FAIL;
goto out_done;
}
if (!(path = malloc(PATH_MAX)))
{
ret = SP_ERR_MEM;
goto out_release;
}
while ((port = IOIteratorNext(iter))) {
cf_path = IORegistryEntryCreateCFProperty(port,
CFSTR(kIOCalloutDeviceKey), kCFAllocatorDefault, 0);
if (cf_path) {
result = CFStringGetCString(cf_path,
path, PATH_MAX, kCFStringEncodingASCII);
CFRelease(cf_path);
if (result && !(list = sp_list_append(list, path)))
{
ret = SP_ERR_MEM;
IOObjectRelease(port);
goto out;
}
}
IOObjectRelease(port);
}
out:
free(path);
out_release:
IOObjectRelease(iter);
out_done:
#endif
#ifdef __linux__
struct udev *ud;
struct udev_enumerate *ud_enumerate;
struct udev_list_entry *ud_list;
struct udev_list_entry *ud_entry;
const char *path;
struct udev_device *ud_dev, *ud_parent;
const char *name;
const char *driver;
int fd, ioctl_result;
struct serial_struct serial_info;
ud = udev_new();
ud_enumerate = udev_enumerate_new(ud);
udev_enumerate_add_match_subsystem(ud_enumerate, "tty");
udev_enumerate_scan_devices(ud_enumerate);
ud_list = udev_enumerate_get_list_entry(ud_enumerate);
udev_list_entry_foreach(ud_entry, ud_list)
{
path = udev_list_entry_get_name(ud_entry);
ud_dev = udev_device_new_from_syspath(ud, path);
/* If there is no parent device, this is a virtual tty. */
ud_parent = udev_device_get_parent(ud_dev);
if (ud_parent == NULL)
{
udev_device_unref(ud_dev);
continue;
}
name = udev_device_get_devnode(ud_dev);
/* The serial8250 driver has a hardcoded number of ports.
* The only way to tell which actually exist on a given system
* is to try to open them and make an ioctl call. */
driver = udev_device_get_driver(ud_parent);
if (driver && !strcmp(driver, "serial8250"))
{
if ((fd = open(name, O_RDWR | O_NONBLOCK | O_NOCTTY)) < 0)
goto skip;
ioctl_result = ioctl(fd, TIOCGSERIAL, &serial_info);
close(fd);
if (ioctl_result != 0)
goto skip;
if (serial_info.type == PORT_UNKNOWN)
goto skip;
}
list = sp_list_append(list, name);
skip:
udev_device_unref(ud_dev);
if (!list)
{
ret = SP_ERR_MEM;
goto out;
}
}
out:
udev_enumerate_unref(ud_enumerate);
udev_unref(ud);
#endif
if (ret == SP_OK)
{
*list_ptr = list;
}
else
{
if (list)
sp_free_port_list(list);
*list_ptr = NULL;
}
return ret;
}
void sp_free_port_list(struct sp_port **list)
{
unsigned int i;
for (i = 0; list[i]; i++)
sp_free_port(list[i]);
free(list);
}
static int sp_validate_port(struct sp_port *port)
{
if (port == NULL)
return 0;
#ifdef _WIN32
if (port->hdl == INVALID_HANDLE_VALUE)
return 0;
#else
if (port->fd < 0)
return 0;
#endif
return 1;
}
#define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0)
int sp_open(struct sp_port *port, int flags)
{
if (!port)
return SP_ERR_ARG;
#ifdef _WIN32
DWORD desired_access = 0, flags_and_attributes = 0;
char *escaped_port_name;
/* Prefix port name with '\\.\' to work with ports above COM9. */
if (!(escaped_port_name = malloc(strlen(port->name + 5))))
return SP_ERR_MEM;
sprintf(escaped_port_name, "\\\\.\\%s", port->name);
/* Map 'flags' to the OS-specific settings. */
desired_access |= GENERIC_READ;
flags_and_attributes = FILE_ATTRIBUTE_NORMAL;
if (flags & SP_MODE_RDWR)
desired_access |= GENERIC_WRITE;
if (flags & SP_MODE_NONBLOCK)
flags_and_attributes |= FILE_FLAG_OVERLAPPED;
port->hdl = CreateFile(escaped_port_name, desired_access, 0, 0,
OPEN_EXISTING, flags_and_attributes, 0);
free(escaped_port_name);
if (port->hdl == INVALID_HANDLE_VALUE)
return SP_ERR_FAIL;
#else
int flags_local = 0;
struct sp_port_data data;
/* Map 'flags' to the OS-specific settings. */
if (flags & SP_MODE_RDWR)
flags_local |= O_RDWR;
if (flags & SP_MODE_RDONLY)
flags_local |= O_RDONLY;
if (flags & SP_MODE_NONBLOCK)
flags_local |= O_NONBLOCK;
if ((port->fd = open(port->name, flags_local)) < 0)
return SP_ERR_FAIL;
start_config(port, &data);
/* Turn off all serial port cooking. */
data.term.c_iflag &= ~(ISTRIP | INLCR | ICRNL);
data.term.c_oflag &= ~(ONLCR | OCRNL | ONOCR);
#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
data.term.c_oflag &= ~OFILL;
#endif
/* Disable canonical mode, and don't echo input characters. */
data.term.c_lflag &= ~(ICANON | ECHO);
/* Ignore modem status lines; enable receiver */
data.term.c_cflag |= (CLOCAL | CREAD);
apply_config(port, &data);
#endif
return SP_OK;
}
int sp_close(struct sp_port *port)
{
CHECK_PORT();
#ifdef _WIN32
/* Returns non-zero upon success, 0 upon failure. */
if (CloseHandle(port->hdl) == 0)
return SP_ERR_FAIL;
#else
/* Returns 0 upon success, -1 upon failure. */
if (close(port->fd) == -1)
return SP_ERR_FAIL;
#endif
return SP_OK;
}
int sp_flush(struct sp_port *port)
{
CHECK_PORT();
#ifdef _WIN32
/* Returns non-zero upon success, 0 upon failure. */
if (PurgeComm(port->hdl, PURGE_RXCLEAR | PURGE_TXCLEAR) == 0)
return SP_ERR_FAIL;
#else
/* Returns 0 upon success, -1 upon failure. */
if (tcflush(port->fd, TCIOFLUSH) < 0)
return SP_ERR_FAIL;
#endif
return SP_OK;
}
int sp_write(struct sp_port *port, const void *buf, size_t count)
{
CHECK_PORT();
if (!buf)
return SP_ERR_ARG;
#ifdef _WIN32
DWORD written = 0;
/* Returns non-zero upon success, 0 upon failure. */
if (WriteFile(port->hdl, buf, count, &written, NULL) == 0)
return SP_ERR_FAIL;
return written;
#else
/* Returns the number of bytes written, or -1 upon failure. */
ssize_t written = write(port->fd, buf, count);
if (written < 0)
return SP_ERR_FAIL;
else
return written;
#endif
}
int sp_read(struct sp_port *port, void *buf, size_t count)
{
CHECK_PORT();
if (!buf)
return SP_ERR_ARG;
#ifdef _WIN32
DWORD bytes_read = 0;
/* Returns non-zero upon success, 0 upon failure. */
if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0)
return SP_ERR_FAIL;
return bytes_read;
#else
ssize_t bytes_read;
/* Returns the number of bytes read, or -1 upon failure. */
if ((bytes_read = read(port->fd, buf, count)) < 0)
return SP_ERR_FAIL;
return bytes_read;
#endif
}
static int start_config(struct sp_port *port, struct sp_port_data *data)
{
CHECK_PORT();
#ifdef _WIN32
if (!GetCommState(port->hdl, &data->dcb))
return SP_ERR_FAIL;
#else
if (tcgetattr(port->fd, &data->term) < 0)
return SP_ERR_FAIL;
if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
return SP_ERR_FAIL;
if (data->term.c_cflag & CRTSCTS) {
data->rts = SP_RTS_FLOW_CONTROL;
data->cts = SP_CTS_FLOW_CONTROL;
} else {
data->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
data->cts = SP_CTS_IGNORE;
}
data->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
data->dsr = SP_DSR_IGNORE;
#endif
return SP_OK;
}
static int set_baudrate(struct sp_port_data *data, int baudrate)
{
unsigned int i;
for (i = 0; i < NUM_STD_BAUDRATES; i++) {
if (baudrate == std_baudrates[i].value) {
#ifdef _WIN32
data->dcb.BaudRate = std_baudrates[i].index;
#else
if (cfsetospeed(&data->term, std_baudrates[i].index) < 0)
return SP_ERR_FAIL;
if (cfsetispeed(&data->term, std_baudrates[i].index) < 0)
return SP_ERR_FAIL;
#endif
break;
}
}
if (i == NUM_STD_BAUDRATES)
return SP_ERR_ARG;
return SP_OK;
}
static int set_bits(struct sp_port_data *data, int bits)
{
#ifdef _WIN32
data->dcb.ByteSize = bits;
#else
data->term.c_cflag &= ~CSIZE;
switch (bits) {
case 8:
data->term.c_cflag |= CS8;
break;
case 7:
data->term.c_cflag |= CS7;
break;
case 6:
data->term.c_cflag |= CS6;
break;
default:
return SP_ERR_ARG;
}
#endif
return SP_OK;
}
static int set_parity(struct sp_port_data *data, int parity)
{
#ifdef _WIN32
switch (parity) {
/* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
case SP_PARITY_NONE:
data->dcb.Parity = NOPARITY;
break;
case SP_PARITY_EVEN:
data->dcb.Parity = EVENPARITY;
break;
case SP_PARITY_ODD:
data->dcb.Parity = ODDPARITY;
break;
default:
return SP_ERR_ARG;
}
#else
data->term.c_iflag &= ~IGNPAR;
data->term.c_cflag &= ~(PARENB | PARODD);
switch (parity) {
case SP_PARITY_NONE:
data->term.c_iflag |= IGNPAR;
break;
case SP_PARITY_EVEN:
data->term.c_cflag |= PARENB;
break;
case SP_PARITY_ODD:
data->term.c_cflag |= PARENB | PARODD;
break;
default:
return SP_ERR_ARG;
}
#endif
return SP_OK;
}
static int set_stopbits(struct sp_port_data *data, int stopbits)
{
#ifdef _WIN32
switch (stopbits) {
/* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
case 1:
data->dcb.StopBits = ONESTOPBIT;
break;
case 2:
data->dcb.StopBits = TWOSTOPBITS;
break;
default:
return SP_ERR_ARG;
}
#else
data->term.c_cflag &= ~CSTOPB;
switch (stopbits) {
case 1:
data->term.c_cflag &= ~CSTOPB;
break;
case 2:
data->term.c_cflag |= CSTOPB;
break;
default:
return SP_ERR_ARG;
}
#endif
return SP_OK;
}
static int set_rts(struct sp_port_data *data, int rts)
{
#ifdef _WIN32
switch (rts) {
case SP_RTS_OFF:
data->dcb.fRtsControl = RTS_CONTROL_DISABLE;
break;
case SP_RTS_ON:
data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
break;
case SP_RTS_FLOW_CONTROL:
data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
break;
default:
return SP_ERR_ARG;
}
#else
data->rts = rts;
#endif
return SP_OK;
}
static int set_cts(struct sp_port_data *data, int cts)
{
#ifdef _WIN32
switch (cts) {
case SP_CTS_IGNORE:
data->dcb.fOutxCtsFlow = FALSE;
break;
case SP_CTS_FLOW_CONTROL:
data->dcb.fOutxCtsFlow = TRUE;
break;
default:
return SP_ERR_ARG;
}
#else
data->cts = cts;
#endif
return SP_OK;
}
static int set_dtr(struct sp_port_data *data, int dtr)
{
#ifdef _WIN32
switch (dtr) {
case SP_DTR_OFF:
data->dcb.fDtrControl = DTR_CONTROL_DISABLE;
break;
case SP_DTR_ON:
data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
break;
case SP_DTR_FLOW_CONTROL:
data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
break;
default:
return SP_ERR_ARG;
}
#else
data->dtr = dtr;
#endif
return SP_OK;
}
static int set_dsr(struct sp_port_data *data, int dsr)
{
#ifdef _WIN32
switch (dsr) {
case SP_DSR_IGNORE:
data->dcb.fOutxDsrFlow = FALSE;
break;
case SP_DSR_FLOW_CONTROL:
data->dcb.fOutxDsrFlow = TRUE;
break;
default:
return SP_ERR_ARG;
}
#else
data->dsr = dsr;
#endif
return SP_OK;
}
static int set_xon_xoff(struct sp_port_data *data, int xon_xoff)
{
#ifdef _WIN32
switch (xon_xoff) {
case SP_XONXOFF_DISABLED:
data->dcb.fInX = FALSE;
data->dcb.fOutX = FALSE;
break;
case SP_XONXOFF_IN:
data->dcb.fInX = TRUE;
data->dcb.fOutX = FALSE;
break;
case SP_XONXOFF_OUT:
data->dcb.fInX = FALSE;
data->dcb.fOutX = TRUE;
break;
case SP_XONXOFF_INOUT:
data->dcb.fInX = TRUE;
data->dcb.fOutX = TRUE;
break;
default:
return SP_ERR_ARG;
}
#else
data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
switch (xon_xoff) {
case SP_XONXOFF_DISABLED:
break;
case SP_XONXOFF_IN:
data->term.c_iflag |= IXOFF;
break;
case SP_XONXOFF_OUT:
data->term.c_iflag |= IXON | IXANY;
break;
case SP_XONXOFF_INOUT:
data->term.c_iflag |= IXON | IXOFF | IXANY;
break;
default:
return SP_ERR_ARG;
}
#endif
return SP_OK;
}
static int apply_config(struct sp_port *port, struct sp_port_data *data)
{
#ifdef _WIN32
if (!SetCommState(port->hdl, &data->dcb))
return SP_ERR_FAIL;
#else
int controlbits;
/* Asymmetric use of RTS/CTS not supported yet. */
if ((data->rts == SP_RTS_FLOW_CONTROL) != (data->cts == SP_CTS_FLOW_CONTROL))
return SP_ERR_ARG;
/* DTR/DSR flow control not supported yet. */
if (data->dtr == SP_DTR_FLOW_CONTROL || data->dsr == SP_DSR_FLOW_CONTROL)
return SP_ERR_ARG;
if (data->rts == SP_RTS_FLOW_CONTROL)
data->term.c_iflag |= CRTSCTS;
else
{
controlbits = TIOCM_RTS;
if (ioctl(port->fd, data->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
&controlbits) < 0)
return SP_ERR_FAIL;
}
controlbits = TIOCM_DTR;
if (ioctl(port->fd, data->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
&controlbits) < 0)
return SP_ERR_FAIL;
/* Write the configured settings. */
if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
return SP_ERR_FAIL;
#endif
return SP_OK;
}
#define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
#define TRY_SET(x, y) do { if (y >= 0) TRY(set_##x(&data, y)); } while (0)
#define TRY_SET_CONFIG(x) TRY_SET(x, config->x)
int sp_set_config(struct sp_port *port, struct sp_port_config *config)
{
struct sp_port_data data;
TRY(start_config(port, &data));
TRY_SET_CONFIG(baudrate);
TRY_SET_CONFIG(bits);
TRY_SET_CONFIG(parity);
TRY_SET_CONFIG(stopbits);
TRY_SET_CONFIG(rts);
TRY_SET_CONFIG(cts);
TRY_SET_CONFIG(dtr);
TRY_SET_CONFIG(dsr);
TRY_SET_CONFIG(xon_xoff);
TRY(apply_config(port, &data));
return SP_OK;
}
int sp_set_flowcontrol(struct sp_port *port, int flowcontrol)
{
struct sp_port_data data;
TRY(start_config(port, &data));
if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
TRY_SET(xon_xoff, SP_XONXOFF_INOUT);
else
TRY_SET(xon_xoff, SP_XONXOFF_DISABLED);
if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
TRY_SET(rts, SP_RTS_FLOW_CONTROL);
TRY_SET(cts, SP_CTS_FLOW_CONTROL);
} else {
TRY_SET(rts, SP_RTS_ON);
TRY_SET(cts, SP_CTS_IGNORE);
}
if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
TRY_SET(dtr, SP_DTR_FLOW_CONTROL);
TRY_SET(dsr, SP_DSR_FLOW_CONTROL);
} else {
TRY_SET(dtr, SP_DTR_ON);
TRY_SET(dsr, SP_DSR_IGNORE);
}
TRY(apply_config(port, &data));
return SP_OK;
}
#define CREATE_SETTER(x) int sp_set_##x(struct sp_port *port, int x) { \
struct sp_port_data data; \
TRY(start_config(port, &data)); \
TRY(set_##x(&data, x)); \
TRY(apply_config(port, &data)); \
return SP_OK; \
}
CREATE_SETTER(baudrate)
CREATE_SETTER(bits)
CREATE_SETTER(parity)
CREATE_SETTER(stopbits)
CREATE_SETTER(rts)
CREATE_SETTER(cts)
CREATE_SETTER(dtr)
CREATE_SETTER(dsr)
CREATE_SETTER(xon_xoff)
int sp_last_error_code(void)
{
#ifdef _WIN32
return GetLastError();
#else
return errno;
#endif
}
char *sp_last_error_message(void)
{
#ifdef _WIN32
LPVOID message;
DWORD error = GetLastError();
FormatMessage(
FORMAT_MESSAGE_ALLOCATE_BUFFER |
FORMAT_MESSAGE_FROM_SYSTEM |
FORMAT_MESSAGE_IGNORE_INSERTS,
NULL,
error,
MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &message,
0, NULL );
return message;
#else
return strerror(errno);
#endif
}
void sp_free_error_message(char *message)
{
#ifdef _WIN32
LocalFree(message);
#else
(void)message;
#endif
}