#ifdef _WIN32
#include <windows.h>
#include <tchar.h>
+#include <stdio.h>
#else
#include <termios.h>
#include <sys/ioctl.h>
#include "libserialport.h"
+struct sp_port_data {
+#ifdef _WIN32
+ DCB dcb;
+#else
+ struct termios term;
+ int rts;
+ int cts;
+ int dtr;
+ int dsr;
+#endif
+};
+
+/* 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_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)
{
void *tmp;
unsigned int count;
+
for (count = 0; list[count]; count++);
if (!(tmp = realloc(list, sizeof(struct sp_port *) * (count + 2))))
goto fail;
goto fail;
list[count + 1] = NULL;
return list;
+
fail:
sp_free_port_list(list);
return NULL;
int ret = SP_OK;
if (!(list = malloc(sizeof(struct sp_port **))))
- return SP_ERR_MEM;;
+ return SP_ERR_MEM;
list[0] = NULL;
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);
#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;
#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
}
#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
}
-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
+ int controlbits;
- if (!GetCommState(port->hdl, &dcb))
+ if (tcgetattr(port->fd, &data->term) < 0)
return SP_ERR_FAIL;
+ if (ioctl(port->fd, TIOCMGET, &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 = (controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
+ data->cts = SP_CTS_IGNORE;
+ }
+
+ data->dtr = (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)
+{
+#ifdef _WIN32
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;
+ data->dcb.BaudRate = CBR_110;
break;
case 300:
- dcb.BaudRate = CBR_300;
+ data->dcb.BaudRate = CBR_300;
break;
case 600:
- dcb.BaudRate = CBR_600;
+ data->dcb.BaudRate = CBR_600;
break;
case 1200:
- dcb.BaudRate = CBR_1200;
+ data->dcb.BaudRate = CBR_1200;
break;
case 2400:
- dcb.BaudRate = CBR_2400;
+ data->dcb.BaudRate = CBR_2400;
break;
case 4800:
- dcb.BaudRate = CBR_4800;
+ data->dcb.BaudRate = CBR_4800;
break;
case 9600:
- dcb.BaudRate = CBR_9600;
+ data->dcb.BaudRate = CBR_9600;
break;
case 14400:
- dcb.BaudRate = CBR_14400; /* Not available on Unix? */
+ data->dcb.BaudRate = CBR_14400; /* Not available on Unix? */
break;
case 19200:
- dcb.BaudRate = CBR_19200;
+ data->dcb.BaudRate = CBR_19200;
break;
case 38400:
- dcb.BaudRate = CBR_38400;
+ data->dcb.BaudRate = CBR_38400;
break;
case 57600:
- dcb.BaudRate = CBR_57600;
+ data->dcb.BaudRate = CBR_57600;
break;
case 115200:
- dcb.BaudRate = CBR_115200;
+ data->dcb.BaudRate = CBR_115200;
break;
case 128000:
- dcb.BaudRate = CBR_128000; /* Not available on Unix? */
+ data->dcb.BaudRate = CBR_128000; /* Not available on Unix? */
break;
case 256000:
- dcb.BaudRate = CBR_256000; /* Not available on Unix? */
+ data->dcb.BaudRate = CBR_256000; /* Not available on Unix? */
break;
default:
return SP_ERR_ARG;
}
-
- switch (stopbits) {
- /* Note: There's also ONE5STOPBITS == 1.5 (unneeded so far). */
- case 1:
- dcb.StopBits = ONESTOPBIT;
- break;
- case 2:
- 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;
- break;
- case SP_PARITY_ODD:
- dcb.Parity = ODDPARITY;
- break;
- default:
- return SP_ERR_ARG;
- }
-
- 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;
return SP_ERR_ARG;
}
- if (cfsetospeed(&term, baud) < 0)
+ if (cfsetospeed(&data->term, baud) < 0)
return SP_ERR_FAIL;
- if (cfsetispeed(&term, baud) < 0)
+ if (cfsetispeed(&data->term, baud) < 0)
return SP_ERR_FAIL;
- term.c_cflag &= ~CSIZE;
+#endif
+ 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:
- term.c_cflag |= CS8;
+ data->term.c_cflag |= CS8;
break;
case 7:
- term.c_cflag |= CS7;
+ 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;
+}
- term.c_cflag &= ~CSTOPB;
+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:
- term.c_cflag &= ~CSTOPB;
+ data->dcb.StopBits = ONESTOPBIT;
break;
case 2:
- term.c_cflag |= CSTOPB;
+ data->dcb.StopBits = TWOSTOPBITS;
break;
default:
return SP_ERR_ARG;
}
-
- term.c_iflag &= ~(IXON | IXOFF | IXANY);
- term.c_cflag &= ~CRTSCTS;
- switch (flowcontrol) {
- case 0:
- /* No flow control. */
- break;
+#else
+ data->term.c_cflag &= ~CSTOPB;
+ switch (stopbits) {
case 1:
- term.c_cflag |= CRTSCTS;
+ data->term.c_cflag &= ~CSTOPB;
break;
case 2:
- term.c_iflag |= IXON | IXOFF | IXANY;
+ data->term.c_cflag |= CSTOPB;
break;
default:
return SP_ERR_ARG;
}
+#endif
+ return SP_OK;
+}
- term.c_iflag &= ~IGNPAR;
- term.c_cflag &= ~(PARENB | PARODD);
- switch (parity) {
- case SP_PARITY_NONE:
- term.c_iflag |= IGNPAR;
+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_PARITY_EVEN:
- term.c_cflag |= PARENB;
+ case SP_RTS_ON:
+ data->dcb.fRtsControl = RTS_CONTROL_ENABLE;
break;
- case SP_PARITY_ODD:
- term.c_cflag |= PARENB | PARODD;
+ 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;
+}
- /* 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;
+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;
+}
- /* Disable canonical mode, and don't echo input characters. */
- term.c_lflag &= ~(ICANON | ECHO);
+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;
+}
- /* Ignore modem status lines; enable receiver */
- term.c_cflag |= (CLOCAL | CREAD);
+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;
+}
- /* Write the configured settings. */
- if (tcsetattr(port->fd, TCSADRAIN, &term) < 0)
+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;
- if (rts != -1) {
+ /* 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, rts ? TIOCMBIS : TIOCMBIC,
+ if (ioctl(port->fd, data->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
&controlbits) < 0)
return SP_ERR_FAIL;
}
- if (dtr != -1) {
- controlbits = TIOCM_DTR;
- if (ioctl(port->fd, dtr ? 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) do { if (config->x >= 0) TRY(set_##x(&data, config->x)); } while (0)
+
+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(baudrate);
+ TRY_SET(bits);
+ TRY_SET(parity);
+ TRY_SET(stopbits);
+ TRY_SET(rts);
+ TRY_SET(cts);
+ TRY_SET(dtr);
+ TRY_SET(dsr);
+ TRY_SET(xon_xoff);
+ 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
projects / libserialport.git / blobdiff