#ifdef _WIN32
#include <windows.h>
#include <tchar.h>
+#include <stdio.h>
#else
#include <termios.h>
#include <sys/ioctl.h>
#include "linux/serial.h"
#endif
-#include "serialport.h"
+#include "libserialport.h"
-static struct sp_port *sp_port_new(char *portname, size_t len)
+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 NULL;
+ return SP_ERR_MEM;
+
+ len = strlen(portname) + 1;
if (!(port->name = malloc(len)))
{
free(port);
- return NULL;
+ return SP_ERR_MEM;
}
memcpy(port->name, portname, len);
- return port;
+ *port_ptr = port;
+
+ return SP_OK;
}
-static struct sp_port **sp_list_append(struct sp_port **list, char *portname, size_t len)
+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 (!(list[count] = sp_port_new(portname, len)))
+ 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;
}
-/**
- * List the serial ports available on the system.
- *
- * @return A null-terminated array of port name strings.
- */
-struct sp_port **sp_list_ports(void)
+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 NULL;
+ return SP_ERR_MEM;
list[0] = NULL;
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)
- return NULL;
+ {
+ 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,
+ 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';
- if (type == REG_SZ)
- if (!(list = sp_list_append(list,
- data, (data_len + 1) * sizeof(TCHAR))))
- goto out;
+#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(value);
out_close:
RegCloseKey(key);
- return list;
+out_done:
#endif
#ifdef __APPLE__
mach_port_t master;
Boolean result;
if (IOMasterPort(MACH_PORT_NULL, &master) != KERN_SUCCESS)
- return NULL;
+ {
+ ret = SP_ERR_FAIL;
+ goto out_done;
+ }
if (!(classes = IOServiceMatching(kIOSerialBSDServiceValue)))
- return NULL;
+ {
+ ret = SP_ERR_FAIL;
+ goto out_done;
+ }
CFDictionarySetValue(classes,
CFSTR(kIOSerialBSDTypeKey), CFSTR(kIOSerialBSDAllTypes));
- if (!(IOServiceGetMatchingServices(master, classes, &iter)))
- return NULL;
+ 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,
result = CFStringGetCString(cf_path,
path, PATH_MAX, kCFStringEncodingASCII);
CFRelease(cf_path);
- if (result)
- if (!(list = sp_list_append(list, path, strlen(path) + 1)))
- {
- IOObjectRelease(port);
- goto out;
- }
+ 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);
- return list;
+out_done:
#endif
#ifdef __linux__
struct udev *ud;
if (serial_info.type == PORT_UNKNOWN)
goto skip;
}
- list = sp_list_append(list, (void *)name, strlen(name) + 1);
+ 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);
- return list;
#endif
+
+ if (ret == SP_OK)
+ {
+ *list_ptr = list;
+ }
+ else
+ {
+ if (list)
+ sp_free_port_list(list);
+
+ *list_ptr = NULL;
+ }
+
+ return ret;
}
-/**
- * Free a port list returned by sp_list_ports.
- */
void sp_free_port_list(struct sp_port **list)
{
unsigned int i;
+
for (i = 0; list[i]; i++)
- free(list[i]);
+ sp_free_port(list[i]);
free(list);
}
#define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0)
-/**
- * Open the specified serial port.
- *
- * @param port Pointer to empty port structure allocated by caller.
- * @param portname Name of port to open.
- * @param flags Flags to use when opening the serial port. Possible flags
- * are: SP_MODE_RDWR, SP_MODE_RDONLY, SP_MODE_NONBLOCK.
- *
- * @return SP_OK on success, SP_ERR_FAIL on failure,
- * or SP_ERR_ARG if an invalid port or name is passed.
- */
int sp_open(struct sp_port *port, int flags)
{
if (!port)
#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_NONBLOCK)
flags_and_attributes |= FILE_FLAG_OVERLAPPED;
- port->hdl = CreateFile(port->name, desired_access, 0, 0,
+ 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 ((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;
}
-/**
- * Close the specified serial port.
- *
- * @param port Pointer to port structure.
- *
- * @return SP_OK on success, SP_ERR_FAIL on failure,
- * or SP_ERR_ARG if an invalid port is passed.
- */
int sp_close(struct sp_port *port)
{
CHECK_PORT();
return SP_OK;
}
-/**
- * Flush serial port buffers.
- *
- * @param port Pointer to port structure.
- *
- * @return SP_OK on success, SP_ERR_FAIL on failure,
- * or SP_ERR_ARG if an invalid port is passed.
- */
int sp_flush(struct sp_port *port)
{
CHECK_PORT();
return SP_OK;
}
-/**
- * Write a number of bytes to the specified serial port.
- *
- * @param port Pointer to port structure.
- * @param buf Buffer containing the bytes to write.
- * @param count Number of bytes to write.
- *
- * @return The number of bytes written, SP_ERR_FAIL on failure,
- * or SP_ERR_ARG if an invalid port is passed.
- */
int sp_write(struct sp_port *port, const void *buf, size_t count)
{
CHECK_PORT();
#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;
#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;;
+ return written;
#endif
}
-/**
- * Read a number of bytes from the specified serial port.
- *
- * @param port Pointer to port structure.
- * @param buf Buffer where to store the bytes that are read.
- * @param count The number of bytes to read.
- *
- * @return The number of bytes read, SP_ERR_FAIL on failure,
- * or SP_ERR_ARG if an invalid port is passed.
- */
int sp_read(struct sp_port *port, void *buf, size_t count)
{
CHECK_PORT();
#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;
#endif
}
-/**
- * Set serial parameters for the specified serial port.
- *
- * @param port Pointer to port structure.
- * @param baudrate The baudrate to set.
- * @param bits The number of data bits to use.
- * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd).
- * @param stopbits The number of stop bits to use (1 or 2).
- * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS,
- * 2 = XON/XOFF).
- *
- * @return The number of bytes read, SP_ERR_FAIL on failure,
- * or SP_ERR_ARG if an invalid argument is passed.
- */
-int sp_set_params(struct sp_port *port, int baudrate,
- int bits, int parity, int stopbits,
- int flowcontrol, int rts, int dtr)
+static int start_config(struct sp_port *port, struct sp_port_data *data)
{
CHECK_PORT();
-
#ifdef _WIN32
- DCB dcb;
+ if (!GetCommState(port->hdl, &data->dcb))
+ return SP_ERR_FAIL;
+#else
+ if (tcgetattr(port->fd, &data->term) < 0)
+ return SP_ERR_FAIL;
- if (!GetCommState(port->hdl, &dcb))
+ if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
return SP_ERR_FAIL;
- switch (baudrate) {
- /*
- * The baudrates 50/75/134/150/200/1800/230400/460800 do not seem to
- * have documented CBR_* macros.
- */
- case 110:
- dcb.BaudRate = CBR_110;
- break;
- case 300:
- dcb.BaudRate = CBR_300;
- break;
- case 600:
- dcb.BaudRate = CBR_600;
- break;
- case 1200:
- dcb.BaudRate = CBR_1200;
- break;
- case 2400:
- dcb.BaudRate = CBR_2400;
- break;
- case 4800:
- dcb.BaudRate = CBR_4800;
+ 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 9600:
- dcb.BaudRate = CBR_9600;
+ case 7:
+ data->term.c_cflag |= CS7;
break;
- case 14400:
- dcb.BaudRate = CBR_14400; /* Not available on Unix? */
+ case 6:
+ data->term.c_cflag |= CS6;
break;
- case 19200:
- dcb.BaudRate = CBR_19200;
+ 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 38400:
- dcb.BaudRate = CBR_38400;
+ case SP_PARITY_EVEN:
+ data->dcb.Parity = EVENPARITY;
break;
- case 57600:
- dcb.BaudRate = CBR_57600;
+ case SP_PARITY_ODD:
+ data->dcb.Parity = ODDPARITY;
break;
- case 115200:
- dcb.BaudRate = CBR_115200;
+ 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 128000:
- dcb.BaudRate = CBR_128000; /* Not available on Unix? */
+ case SP_PARITY_EVEN:
+ data->term.c_cflag |= PARENB;
break;
- case 256000:
- dcb.BaudRate = CBR_256000; /* Not available on Unix? */
+ 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:
- dcb.StopBits = ONESTOPBIT;
+ data->dcb.StopBits = ONESTOPBIT;
break;
case 2:
- dcb.StopBits = TWOSTOPBITS;
+ data->dcb.StopBits = TWOSTOPBITS;
break;
default:
return SP_ERR_ARG;
}
-
- switch (parity) {
- /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
- case SP_PARITY_NONE:
- dcb.Parity = NOPARITY;
- break;
- case SP_PARITY_EVEN:
- dcb.Parity = EVENPARITY;
+#else
+ data->term.c_cflag &= ~CSTOPB;
+ switch (stopbits) {
+ case 1:
+ data->term.c_cflag &= ~CSTOPB;
break;
- case SP_PARITY_ODD:
- dcb.Parity = ODDPARITY;
+ case 2:
+ data->term.c_cflag |= CSTOPB;
break;
default:
return SP_ERR_ARG;
}
+#endif
+ return SP_OK;
+}
- if (rts != -1) {
- if (rts)
- dcb.fRtsControl = RTS_CONTROL_ENABLE;
- else
- dcb.fRtsControl = RTS_CONTROL_DISABLE;
- }
-
- if (dtr != -1) {
- if (dtr)
- dcb.fDtrControl = DTR_CONTROL_ENABLE;
- else
- dcb.fDtrControl = DTR_CONTROL_DISABLE;
- }
-
- if (!SetCommState(port->hdl, &dcb))
- return SP_ERR_FAIL;
-#else
- struct termios term;
- speed_t baud;
- int controlbits;
-
- if (tcgetattr(port->fd, &term) < 0)
- return SP_ERR_FAIL;
-
- switch (baudrate) {
- case 50:
- baud = B50;
- break;
- case 75:
- baud = B75;
+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 110:
- baud = B110;
+ case SP_RTS_ON:
+ data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
break;
- case 134:
- baud = B134;
+ case SP_RTS_FLOW_CONTROL:
+ data->dcb.fRtsControl = RTS_CONTROL_HANDSHAKE;
break;
- case 150:
- baud = B150;
+ 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 200:
- baud = B200;
+ case SP_CTS_FLOW_CONTROL:
+ data->dcb.fOutxCtsFlow = TRUE;
break;
- case 300:
- baud = B300;
+ 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 600:
- baud = B600;
+ case SP_DTR_ON:
+ data->dcb.fDtrControl = DTR_CONTROL_ENABLE;
break;
- case 1200:
- baud = B1200;
+ case SP_DTR_FLOW_CONTROL:
+ data->dcb.fDtrControl = DTR_CONTROL_HANDSHAKE;
break;
- case 1800:
- baud = B1800;
+ 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 2400:
- baud = B2400;
+ case SP_DSR_FLOW_CONTROL:
+ data->dcb.fOutxDsrFlow = TRUE;
break;
- case 4800:
- baud = B4800;
+ 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 9600:
- baud = B9600;
+ case SP_XONXOFF_IN:
+ data->dcb.fInX = TRUE;
+ data->dcb.fOutX = FALSE;
break;
- case 19200:
- baud = B19200;
+ case SP_XONXOFF_OUT:
+ data->dcb.fInX = FALSE;
+ data->dcb.fOutX = TRUE;
break;
- case 38400:
- baud = B38400;
+ case SP_XONXOFF_INOUT:
+ data->dcb.fInX = TRUE;
+ data->dcb.fOutX = TRUE;
break;
- case 57600:
- baud = B57600;
+ default:
+ return SP_ERR_ARG;
+ }
+#else
+ data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
+ switch (xon_xoff) {
+ case SP_XONXOFF_DISABLED:
break;
- case 115200:
- baud = B115200;
+ case SP_XONXOFF_IN:
+ data->term.c_iflag |= IXOFF;
break;
- case 230400:
- baud = B230400;
+ case SP_XONXOFF_OUT:
+ data->term.c_iflag |= IXON | IXANY;
break;
-#if !defined(__APPLE__) && !defined(__OpenBSD__)
- case 460800:
- baud = B460800;
+ case SP_XONXOFF_INOUT:
+ data->term.c_iflag |= IXON | IXOFF | IXANY;
break;
-#endif
default:
return SP_ERR_ARG;
}
+#endif
+ return SP_OK;
+}
- if (cfsetospeed(&term, baud) < 0)
+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;
- if (cfsetispeed(&term, baud) < 0)
- return SP_ERR_FAIL;
+ /* 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;
- term.c_cflag &= ~CSIZE;
- switch (bits) {
- case 8:
- term.c_cflag |= CS8;
- break;
- case 7:
- term.c_cflag |= CS7;
- break;
- default:
+ /* 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;
}
- term.c_cflag &= ~CSTOPB;
- switch (stopbits) {
- case 1:
- term.c_cflag &= ~CSTOPB;
- break;
- case 2:
- term.c_cflag |= CSTOPB;
- break;
- default:
- return SP_ERR_ARG;
+ 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_get_config(struct sp_port *port, struct sp_port_config *config)
+{
+ struct sp_port_data data;
+ unsigned int i;
+
+ TRY(start_config(port, &data));
+
+#ifdef _WIN32
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (data.dcb.BaudRate == std_baudrates[i].index) {
+ config->baudrate = std_baudrates[i].value;
+ break;
+ }
}
- term.c_iflag &= ~(IXON | IXOFF | IXANY);
- term.c_cflag &= ~CRTSCTS;
- switch (flowcontrol) {
- case 0:
- /* No flow control. */
- break;
- case 1:
- term.c_cflag |= CRTSCTS;
+ if (i == NUM_STD_BAUDRATES)
+ /* BaudRate field can be either an index or a custom baud rate. */
+ config->baudrate = data.dcb.BaudRate;
+
+ config->bits = data.dcb.ByteSize;
+
+ if (data.dcb.fParity)
+ switch (data.dcb.Parity) {
+ case NOPARITY:
+ config->parity = SP_PARITY_NONE;
+ break;
+ case EVENPARITY:
+ config->parity = SP_PARITY_EVEN;
+ break;
+ case ODDPARITY:
+ config->parity = SP_PARITY_ODD;
+ break;
+ default:
+ config->parity = -1;
+ }
+ else
+ config->parity = SP_PARITY_NONE;
+
+ switch (data.dcb.StopBits) {
+ case ONESTOPBIT:
+ config->stopbits = 1;
break;
- case 2:
- term.c_iflag |= IXON | IXOFF | IXANY;
+ case TWOSTOPBITS:
+ config->stopbits = 2;
break;
default:
- return SP_ERR_ARG;
+ config->stopbits = -1;
}
- term.c_iflag &= ~IGNPAR;
- term.c_cflag &= ~(PARENB | PARODD);
- switch (parity) {
- case SP_PARITY_NONE:
- term.c_iflag |= IGNPAR;
+ switch (data.dcb.fRtsControl) {
+ case RTS_CONTROL_DISABLE:
+ config->rts = SP_RTS_OFF;
+ break;
+ case RTS_CONTROL_ENABLE:
+ config->rts = SP_RTS_ON;
+ break;
+ case RTS_CONTROL_HANDSHAKE:
+ config->rts = SP_RTS_FLOW_CONTROL;
+ break;
+ default:
+ config->rts = -1;
+ }
+
+ config->cts = data.dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
+
+ switch (data.dcb.fDtrControl) {
+ case DTR_CONTROL_DISABLE:
+ config->dtr = SP_DTR_OFF;
+ break;
+ case DTR_CONTROL_ENABLE:
+ config->dtr = SP_DTR_ON;
+ break;
+ case DTR_CONTROL_HANDSHAKE:
+ config->dtr = SP_DTR_FLOW_CONTROL;
+ break;
+ default:
+ config->dtr = -1;
+ }
+
+ config->dsr = data.dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
+#else
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (cfgetispeed(&data.term) == std_baudrates[i].index) {
+ config->baudrate = std_baudrates[i].value;
+ break;
+ }
+ }
+
+ if (i == NUM_STD_BAUDRATES)
+ config->baudrate = -1;
+
+ switch (data.term.c_cflag & CSIZE) {
+ case CS8:
+ config->bits = 8;
break;
- case SP_PARITY_EVEN:
- term.c_cflag |= PARENB;
+ case CS7:
+ config->bits = 7;
break;
- case SP_PARITY_ODD:
- term.c_cflag |= PARENB | PARODD;
+ case CS6:
+ config->bits = 6;
+ break;
+ case CS5:
+ config->bits = 5;
break;
default:
- return SP_ERR_ARG;
+ config->bits = -1;
}
- /* Turn off all serial port cooking. */
- term.c_iflag &= ~(ISTRIP | INLCR | ICRNL);
- term.c_oflag &= ~(ONLCR | OCRNL | ONOCR);
-#if !defined(__FreeBSD__) && !defined(__OpenBSD__) && !defined(__NetBSD__)
- term.c_oflag &= ~OFILL;
+ if (!(data.term.c_cflag & PARENB) && (data.term.c_iflag & IGNPAR))
+ config->parity = SP_PARITY_NONE;
+ else if (!(data.term.c_cflag & PARENB) || (data.term.c_iflag & IGNPAR))
+ config->parity = -1;
+ else
+ config->parity = (data.term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
+
+ config->stopbits = (data.term.c_cflag & CSTOPB) ? 2 : 1;
+
+ if (data.term.c_cflag & CRTSCTS) {
+ config->rts = SP_RTS_FLOW_CONTROL;
+ config->cts = SP_CTS_FLOW_CONTROL;
+ } else {
+ config->rts = (data.controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
+ config->cts = SP_CTS_IGNORE;
+ }
+
+ config->dtr = (data.controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
+ config->dsr = SP_DSR_IGNORE;
#endif
- /* Disable canonical mode, and don't echo input characters. */
- term.c_lflag &= ~(ICANON | ECHO);
+ return SP_OK;
+}
- /* Ignore modem status lines; enable receiver */
- term.c_cflag |= (CLOCAL | CREAD);
+int sp_set_flowcontrol(struct sp_port *port, int flowcontrol)
+{
+ struct sp_port_data data;
- /* Write the configured settings. */
- if (tcsetattr(port->fd, TCSADRAIN, &term) < 0)
- return SP_ERR_FAIL;
+ TRY(start_config(port, &data));
- if (rts != -1) {
- controlbits = TIOCM_RTS;
- if (ioctl(port->fd, rts ? TIOCMBIS : TIOCMBIC,
- &controlbits) < 0)
- return SP_ERR_FAIL;
+ 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 (dtr != -1) {
- controlbits = TIOCM_DTR;
- if (ioctl(port->fd, dtr ? TIOCMBIS : TIOCMBIC,
- &controlbits) < 0)
- return SP_ERR_FAIL;
+ 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);
}
-#endif
+
+ TRY(apply_config(port, &data));
return SP_OK;
}
-/**
- * Get error code for failed operation.
- *
- * In order to obtain the correct result, this function should be called
- * straight after the failure, before executing any other system operations.
- *
- * @return The system's numeric code for the error that caused the last
- * operation to fail.
- */
+#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
#endif
}
-/**
- * Get error message for failed operation.
- *
- * In order to obtain the correct result, this function should be called
- * straight after the failure, before executing other system operations.
- *
- * @return The system's message for the error that caused the last
- * operation to fail. This string may be allocated by the function,
- * and can be freed after use by calling sp_free_error_message.
- */
char *sp_last_error_message(void)
{
#ifdef _WIN32
#endif
}
-/**
- * Free error message.
- *
- * This function can be used to free a string returned by the
- * sp_last_error_message function.
- */
void sp_free_error_message(char *message)
{
#ifdef _WIN32
projects / libserialport.git / blobdiff