#include <tchar.h>
#include <stdio.h>
#else
+#include <limits.h>
#include <termios.h>
#include <sys/ioctl.h>
+#include <sys/time.h>
+#include <limits.h>
#endif
#ifdef __APPLE__
#include <IOKit/IOKitLib.h>
#include <sys/syslimits.h>
#endif
#ifdef __linux__
+#ifdef HAVE_LIBUDEV
#include "libudev.h"
+#endif
+#ifndef __ANDROID__
#include "linux/serial.h"
+#endif
#include "linux_termios.h"
+
+/* TCGETX/TCSETX is not available everywhere. */
#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
#define USE_TERMIOX
#endif
#endif
+/* TIOCINQ/TIOCOUTQ is not available everywhere. */
+#if !defined(TIOCINQ) && defined(FIONREAD)
+#define TIOCINQ FIONREAD
+#endif
+#if !defined(TIOCOUTQ) && defined(FIONWRITE)
+#define TIOCOUTQ FIONWRITE
+#endif
+
#ifndef _WIN32
#include "linux_termios.h"
#endif
#include "libserialport.h"
+struct sp_port {
+ char *name;
+#ifdef _WIN32
+ HANDLE hdl;
+ COMMTIMEOUTS timeouts;
+ OVERLAPPED write_ovl;
+ OVERLAPPED read_ovl;
+ BYTE pending_byte;
+ BOOL writing;
+#else
+ int fd;
+#endif
+};
+
+struct sp_port_config {
+ int baudrate;
+ int bits;
+ enum sp_parity parity;
+ int stopbits;
+ enum sp_rts rts;
+ enum sp_cts cts;
+ enum sp_dtr dtr;
+ enum sp_dsr dsr;
+ enum sp_xonxoff xon_xoff;
+};
+
struct port_data {
#ifdef _WIN32
DCB dcb;
#define RETURN_OK() RETURN_CODE(SP_OK);
#define RETURN_ERROR(err, msg) do { DEBUG_ERROR(err, msg); return err; } while (0)
#define RETURN_FAIL(msg) do { DEBUG_FAIL(msg); return SP_ERR_FAIL; } while (0)
-#define RETURN_VALUE(fmt, x) do { DEBUG("%s returning " fmt, __func__, x); return x; } while (0)
+#define RETURN_VALUE(fmt, x) do { \
+ typeof(x) _x = x; \
+ DEBUG("%s returning " fmt, __func__, _x); \
+ return _x; \
+} while (0)
#define SET_ERROR(val, err, msg) do { DEBUG_ERROR(err, msg); val = err; } while (0)
-#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = err; } while (0)
+#define SET_FAIL(val, msg) do { DEBUG_FAIL(msg); val = SP_ERR_FAIL; } while (0)
#define TRACE(fmt, ...) DEBUG("%s(" fmt ") called", __func__, ##__VA_ARGS__)
#define TRY(x) do { int ret = x; if (ret != SP_OK) RETURN_CODEVAL(ret); } while (0)
RETURN_OK();
}
+char *sp_get_port_name(const struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ if (!port)
+ return NULL;
+
+ RETURN_VALUE("%s", port->name);
+}
+
+enum sp_return sp_get_port_handle(const struct sp_port *port, void *result_ptr)
+{
+ TRACE("%p, %p", port, result_ptr);
+
+ if (!port)
+ RETURN_ERROR(SP_ERR_ARG, "Null port");
+
+#ifdef _WIN32
+ HANDLE *handle_ptr = result_ptr;
+ *handle_ptr = port->hdl;
+#else
+ int *fd_ptr = result_ptr;
+ *fd_ptr = port->fd;
+#endif
+
+ RETURN_OK();
+}
+
enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
{
TRACE("%p, %p", port, copy_ptr);
{
TRACE("%p", port);
- if (!port)
- {
+ if (!port) {
DEBUG("Null port");
RETURN();
}
IOObjectRelease(iter);
out_done:
#endif
-#ifdef __linux__
+#if defined(__linux__) && defined(HAVE_LIBUDEV)
struct udev *ud;
struct udev_enumerate *ud_enumerate;
struct udev_list_entry *ud_list;
*list_ptr = list;
RETURN_OK();
case SP_ERR_SUPP:
- DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform.");
+ DEBUG_ERROR(SP_ERR_SUPP, "Enumeration not supported on this platform");
default:
if (list)
sp_free_port_list(list);
enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
{
- TRACE("%p, %x", port, flags);
+ struct port_data data;
+ struct sp_port_config config;
+ enum sp_return ret;
+
+ TRACE("%p, 0x%x", port, flags);
CHECK_PORT();
- if (flags > (SP_MODE_READ | SP_MODE_WRITE | SP_MODE_NONBLOCK))
+ if (flags > (SP_MODE_READ | SP_MODE_WRITE))
RETURN_ERROR(SP_ERR_ARG, "Invalid flags");
DEBUG("Opening port %s", port->name);
#ifdef _WIN32
- DWORD desired_access = 0, flags_and_attributes = 0;
+ DWORD desired_access = 0, flags_and_attributes = 0, errors;
char *escaped_port_name;
+ COMSTAT status;
/* Prefix port name with '\\.\' to work with ports above COM9. */
if (!(escaped_port_name = malloc(strlen(port->name + 5))))
sprintf(escaped_port_name, "\\\\.\\%s", port->name);
/* Map 'flags' to the OS-specific settings. */
- flags_and_attributes = FILE_ATTRIBUTE_NORMAL;
+ flags_and_attributes = FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED;
if (flags & SP_MODE_READ)
desired_access |= GENERIC_READ;
if (flags & SP_MODE_WRITE)
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_FAIL("CreateFile() failed");
+ RETURN_FAIL("port CreateFile() failed");
+
+ /* All timeouts initially disabled. */
+ port->timeouts.ReadIntervalTimeout = 0;
+ port->timeouts.ReadTotalTimeoutMultiplier = 0;
+ port->timeouts.ReadTotalTimeoutConstant = 0;
+ port->timeouts.WriteTotalTimeoutMultiplier = 0;
+ port->timeouts.WriteTotalTimeoutConstant = 0;
+
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0) {
+ sp_close(port);
+ RETURN_FAIL("SetCommTimeouts() failed");
+ }
+
+ /* Prepare OVERLAPPED structures. */
+ memset(&port->read_ovl, 0, sizeof(port->read_ovl));
+ memset(&port->write_ovl, 0, sizeof(port->write_ovl));
+ port->read_ovl.hEvent = INVALID_HANDLE_VALUE;
+ port->write_ovl.hEvent = INVALID_HANDLE_VALUE;
+ if ((port->read_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
+ sp_close(port);
+ RETURN_FAIL("read event CreateEvent() failed");
+ }
+ if ((port->write_ovl.hEvent = CreateEvent(NULL, TRUE, FALSE, NULL)) == INVALID_HANDLE_VALUE) {
+ sp_close(port);
+ RETURN_FAIL("write event CreateEvent() failed");
+ }
+
+ port->writing = FALSE;
+
#else
- int flags_local = 0;
- struct port_data data;
- struct sp_port_config config;
- int ret;
+ int flags_local = O_NONBLOCK | O_NOCTTY;
/* Map 'flags' to the OS-specific settings. */
if (flags & (SP_MODE_READ | SP_MODE_WRITE))
flags_local |= O_RDONLY;
else if (flags & SP_MODE_WRITE)
flags_local |= O_WRONLY;
- if (flags & SP_MODE_NONBLOCK)
- flags_local |= O_NONBLOCK;
if ((port->fd = open(port->name, flags_local)) < 0)
RETURN_FAIL("open() failed");
+#endif
ret = get_config(port, &data, &config);
RETURN_CODEVAL(ret);
}
- /* 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__)
+ /* Set sane port settings. */
+#ifdef _WIN32
+ data.dcb.fBinary = TRUE;
+ data.dcb.fDsrSensitivity = FALSE;
+ data.dcb.fErrorChar = FALSE;
+ data.dcb.fNull = FALSE;
+ data.dcb.fAbortOnError = TRUE;
+#else
+ /* Turn off all fancy termios tricks, give us a raw channel. */
+ data.term.c_iflag &= ~(IGNBRK | BRKINT | PARMRK | ISTRIP | INLCR | IGNCR | ICRNL | IMAXBEL);
+#ifdef IUCLC
+ data.term.c_iflag &= ~IUCLC;
+#endif
+ data.term.c_oflag &= ~(OPOST | ONLCR | OCRNL | ONOCR | ONLRET);
+#ifdef OLCUC
+ data.term.c_oflag &= ~OLCUC;
+#endif
+#ifdef NLDLY
+ data.term.c_oflag &= ~NLDLY;
+#endif
+#ifdef CRDLY
+ data.term.c_oflag &= ~CRDLY;
+#endif
+#ifdef TABDLY
+ data.term.c_oflag &= ~TABDLY;
+#endif
+#ifdef BSDLY
+ data.term.c_oflag &= ~BSDLY;
+#endif
+#ifdef VTDLY
+ data.term.c_oflag &= ~VTDLY;
+#endif
+#ifdef FFDLY
+ data.term.c_oflag &= ~FFDLY;
+#endif
+#ifdef OFILL
data.term.c_oflag &= ~OFILL;
#endif
- /* Disable canonical mode, and don't echo input characters. */
- data.term.c_lflag &= ~(ICANON | ECHO);
+ data.term.c_lflag &= ~(ISIG | ICANON | ECHO | IEXTEN);
+ data.term.c_cc[VMIN] = 0;
+ data.term.c_cc[VTIME] = 0;
- /* Ignore modem status lines; enable receiver */
- data.term.c_cflag |= (CLOCAL | CREAD);
+ /* Ignore modem status lines; enable receiver; leave control lines alone on close. */
+ data.term.c_cflag |= (CLOCAL | CREAD | HUPCL);
+#endif
+
+#ifdef _WIN32
+ if (ClearCommError(port->hdl, &errors, &status) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+#endif
ret = set_config(port, &data, &config);
sp_close(port);
RETURN_CODEVAL(ret);
}
-#endif
RETURN_OK();
}
#ifdef _WIN32
/* Returns non-zero upon success, 0 upon failure. */
if (CloseHandle(port->hdl) == 0)
- RETURN_FAIL("CloseHandle() failed");
+ RETURN_FAIL("port CloseHandle() failed");
port->hdl = INVALID_HANDLE_VALUE;
+ /* Close event handle created for overlapped reads. */
+ if (port->read_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->read_ovl.hEvent) == 0)
+ RETURN_FAIL("read event CloseHandle() failed");
+ /* Close event handle created for overlapped writes. */
+ if (port->write_ovl.hEvent != INVALID_HANDLE_VALUE && CloseHandle(port->write_ovl.hEvent) == 0)
+ RETURN_FAIL("write event CloseHandle() failed");
#else
/* Returns 0 upon success, -1 upon failure. */
if (close(port->fd) == -1)
enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
{
- TRACE("%p, %x", port, buffers);
+ TRACE("%p, 0x%x", port, buffers);
CHECK_OPEN_PORT();
if (buffers > SP_BUF_BOTH)
RETURN_ERROR(SP_ERR_ARG, "Invalid buffer selection");
- const char *buffer_names[] = {"input", "output", "both"};
+ const char *buffer_names[] = {"no", "input", "output", "both"};
DEBUG("Flushing %s buffers on port %s", buffer_names[buffers], port->name);
/* Returns non-zero upon success, 0 upon failure. */
if (FlushFileBuffers(port->hdl) == 0)
RETURN_FAIL("FlushFileBuffers() failed");
+ RETURN_OK();
#else
- /* Returns 0 upon success, -1 upon failure. */
- if (tcdrain(port->fd) < 0)
- RETURN_FAIL("tcdrain() failed");
+ int result;
+ while (1) {
+#ifdef __ANDROID__
+ int arg = 1;
+ result = ioctl(port->fd, TCSBRK, &arg);
+#else
+ result = tcdrain(port->fd);
#endif
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("tcdrain() was interrupted");
+ continue;
+ } else {
+ RETURN_FAIL("tcdrain() failed");
+ }
+ } else {
+ RETURN_OK();
+ }
+ }
+#endif
+}
- RETURN_OK();
+enum sp_return sp_blocking_write(struct sp_port *port, const void *buf, size_t count, unsigned int timeout)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (timeout)
+ DEBUG("Writing %d bytes to port %s, timeout %d ms", count, port->name, timeout);
+ else
+ DEBUG("Writing %d bytes to port %s, no timeout", count, port->name);
+
+ if (count == 0)
+ RETURN_VALUE("0", 0);
+
+#ifdef _WIN32
+ DWORD bytes_written = 0;
+ BOOL result;
+
+ /* Wait for previous non-blocking write to complete, if any. */
+ if (port->writing) {
+ DEBUG("Waiting for previous write to complete");
+ result = GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
+ port->writing = 0;
+ if (!result)
+ RETURN_FAIL("Previous write failed to complete");
+ DEBUG("Previous write completed");
+ }
+
+ /* Set timeout. */
+ port->timeouts.WriteTotalTimeoutConstant = timeout;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Start write. */
+ if (WriteFile(port->hdl, buf, count, NULL, &port->write_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for write to complete");
+ GetOverlappedResult(port->hdl, &port->write_ovl, &bytes_written, TRUE);
+ DEBUG("Write completed, %d/%d bytes written", bytes_written, count);
+ RETURN_VALUE("%d", bytes_written);
+ } else {
+ RETURN_FAIL("WriteFile() failed");
+ }
+ } else {
+ DEBUG("Write completed immediately");
+ RETURN_VALUE("%d", count);
+ }
+#else
+ size_t bytes_written = 0;
+ unsigned char *ptr = (unsigned char *) buf;
+ struct timeval start, delta, now, end = {0, 0};
+ fd_set fds;
+ int result;
+
+ if (timeout) {
+ /* Get time at start of operation. */
+ gettimeofday(&start, NULL);
+ /* Define duration of timeout. */
+ delta.tv_sec = timeout / 1000;
+ delta.tv_usec = (timeout % 1000) * 1000;
+ /* Calculate time at which we should give up. */
+ timeradd(&start, &delta, &end);
+ }
+
+ /* Loop until we have written the requested number of bytes. */
+ while (bytes_written < count)
+ {
+ /* Wait until space is available. */
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+ if (timeout) {
+ gettimeofday(&now, NULL);
+ if (timercmp(&now, &end, >)) {
+ DEBUG("write timed out");
+ RETURN_VALUE("%d", bytes_written);
+ }
+ timersub(&end, &now, &delta);
+ }
+ result = select(port->fd + 1, NULL, &fds, NULL, timeout ? &delta : NULL);
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ DEBUG("write timed out");
+ RETURN_VALUE("%d", bytes_written);
+ }
+
+ /* Do write. */
+ result = write(port->fd, ptr, count - bytes_written);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /* This shouldn't happen because we did a select() first, but handle anyway. */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("write() failed");
+ }
+
+ bytes_written += result;
+ ptr += result;
+ }
+
+ RETURN_VALUE("%d", bytes_written);
+#endif
}
-enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count)
+enum sp_return sp_nonblocking_write(struct sp_port *port, const void *buf, size_t count)
{
TRACE("%p, %p, %d", port, buf, count);
DEBUG("Writing up to %d bytes to port %s", count, port->name);
+ if (count == 0)
+ RETURN_VALUE("0", 0);
+
#ifdef _WIN32
DWORD written = 0;
+ BYTE *ptr = (BYTE *) buf;
+
+ /* Check whether previous write is complete. */
+ if (port->writing) {
+ if (HasOverlappedIoCompleted(&port->write_ovl)) {
+ DEBUG("Previous write completed");
+ port->writing = 0;
+ } else {
+ DEBUG("Previous write not complete");
+ /* Can't take a new write until the previous one finishes. */
+ RETURN_VALUE("0", 0);
+ }
+ }
+
+ /* Set timeout. */
+ port->timeouts.WriteTotalTimeoutConstant = 0;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Keep writing data until the OS has to actually start an async IO for it.
+ * At that point we know the buffer is full. */
+ while (written < count)
+ {
+ /* Copy first byte of user buffer. */
+ port->pending_byte = *ptr++;
+
+ /* Start asynchronous write. */
+ if (WriteFile(port->hdl, &port->pending_byte, 1, NULL, &port->write_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ if (HasOverlappedIoCompleted(&port->write_ovl)) {
+ DEBUG("Asynchronous write completed immediately");
+ port->writing = 0;
+ written++;
+ continue;
+ } else {
+ DEBUG("Asynchronous write running");
+ port->writing = 1;
+ RETURN_VALUE("%d", ++written);
+ }
+ } else {
+ /* Actual failure of some kind. */
+ RETURN_FAIL("WriteFile() failed");
+ }
+ } else {
+ DEBUG("Single byte written immediately");
+ written++;
+ }
+ }
+
+ DEBUG("All bytes written immediately");
- /* Returns non-zero upon success, 0 upon failure. */
- if (WriteFile(port->hdl, buf, count, &written, NULL) == 0)
- RETURN_FAIL("WriteFile() failed");
RETURN_VALUE("%d", written);
#else
/* Returns the number of bytes written, or -1 upon failure. */
#endif
}
-enum sp_return sp_read(struct sp_port *port, void *buf, size_t count)
+enum sp_return sp_blocking_read(struct sp_port *port, void *buf, size_t count, unsigned int timeout)
+{
+ TRACE("%p, %p, %d, %d", port, buf, count, timeout);
+
+ CHECK_OPEN_PORT();
+
+ if (!buf)
+ RETURN_ERROR(SP_ERR_ARG, "Null buffer");
+
+ if (timeout)
+ DEBUG("Reading %d bytes from port %s, timeout %d ms", count, port->name, timeout);
+ else
+ DEBUG("Reading %d bytes from port %s, no timeout", count, port->name);
+
+ if (count == 0)
+ RETURN_VALUE("0", 0);
+
+#ifdef _WIN32
+ DWORD bytes_read = 0;
+
+ /* Set timeout. */
+ port->timeouts.ReadIntervalTimeout = 0;
+ port->timeouts.ReadTotalTimeoutConstant = timeout;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Start read. */
+ if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0) {
+ if (GetLastError() == ERROR_IO_PENDING) {
+ DEBUG("Waiting for read to complete");
+ GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE);
+ DEBUG("Read completed, %d/%d bytes read", bytes_read, count);
+ RETURN_VALUE("%d", bytes_read);
+ } else {
+ RETURN_FAIL("ReadFile() failed");
+ }
+ } else {
+ DEBUG("Read completed immediately");
+ RETURN_VALUE("%d", count);
+ }
+#else
+ size_t bytes_read = 0;
+ unsigned char *ptr = (unsigned char *) buf;
+ struct timeval start, delta, now, end = {0, 0};
+ fd_set fds;
+ int result;
+
+ if (timeout) {
+ /* Get time at start of operation. */
+ gettimeofday(&start, NULL);
+ /* Define duration of timeout. */
+ delta.tv_sec = timeout / 1000;
+ delta.tv_usec = (timeout % 1000) * 1000;
+ /* Calculate time at which we should give up. */
+ timeradd(&start, &delta, &end);
+ }
+
+ /* Loop until we have the requested number of bytes. */
+ while (bytes_read < count)
+ {
+ /* Wait until data is available. */
+ FD_ZERO(&fds);
+ FD_SET(port->fd, &fds);
+ if (timeout) {
+ gettimeofday(&now, NULL);
+ if (timercmp(&now, &end, >))
+ /* Timeout has expired. */
+ RETURN_VALUE("%d", bytes_read);
+ timersub(&end, &now, &delta);
+ }
+ result = select(port->fd + 1, &fds, NULL, NULL, timeout ? &delta : NULL);
+ if (result < 0) {
+ if (errno == EINTR) {
+ DEBUG("select() call was interrupted, repeating");
+ continue;
+ } else {
+ RETURN_FAIL("select() failed");
+ }
+ } else if (result == 0) {
+ DEBUG("read timed out");
+ RETURN_VALUE("%d", bytes_read);
+ }
+
+ /* Do read. */
+ result = read(port->fd, ptr, count - bytes_read);
+
+ if (result < 0) {
+ if (errno == EAGAIN)
+ /* This shouldn't happen because we did a select() first, but handle anyway. */
+ continue;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
+
+ bytes_read += result;
+ ptr += result;
+ }
+
+ RETURN_VALUE("%d", bytes_read);
+#endif
+}
+
+enum sp_return sp_nonblocking_read(struct sp_port *port, void *buf, size_t count)
{
TRACE("%p, %p, %d", port, buf, count);
DEBUG("Reading up to %d bytes from port %s", count, port->name);
#ifdef _WIN32
- DWORD bytes_read = 0;
+ DWORD bytes_read;
- /* Returns non-zero upon success, 0 upon failure. */
- if (ReadFile(port->hdl, buf, count, &bytes_read, NULL) == 0)
+ /* Set timeout. */
+ port->timeouts.ReadIntervalTimeout = MAXDWORD;
+ port->timeouts.ReadTotalTimeoutConstant = 0;
+ if (SetCommTimeouts(port->hdl, &port->timeouts) == 0)
+ RETURN_FAIL("SetCommTimeouts() failed");
+
+ /* Do read. */
+ if (ReadFile(port->hdl, buf, count, NULL, &port->read_ovl) == 0)
RETURN_FAIL("ReadFile() failed");
+
+ /* Get number of bytes read. */
+ if (GetOverlappedResult(port->hdl, &port->read_ovl, &bytes_read, TRUE) == 0)
+ RETURN_FAIL("GetOverlappedResult() failed");
+
RETURN_VALUE("%d", 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_FAIL("read() failed");
+ if ((bytes_read = read(port->fd, buf, count)) < 0) {
+ if (errno == EAGAIN)
+ /* No bytes available. */
+ bytes_read = 0;
+ else
+ /* This is an actual failure. */
+ RETURN_FAIL("read() failed");
+ }
RETURN_VALUE("%d", bytes_read);
#endif
}
+enum sp_return sp_input_waiting(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG("Checking input bytes waiting on port %s", port->name);
+
+#ifdef _WIN32
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+ RETURN_VALUE("%d", comstat.cbInQue);
+#else
+ int bytes_waiting;
+ if (ioctl(port->fd, TIOCINQ, &bytes_waiting) < 0)
+ RETURN_FAIL("TIOCINQ ioctl failed");
+ RETURN_VALUE("%d", bytes_waiting);
+#endif
+}
+
+enum sp_return sp_output_waiting(struct sp_port *port)
+{
+ TRACE("%p", port);
+
+ CHECK_OPEN_PORT();
+
+ DEBUG("Checking output bytes waiting on port %s", port->name);
+
+#ifdef _WIN32
+ DWORD errors;
+ COMSTAT comstat;
+
+ if (ClearCommError(port->hdl, &errors, &comstat) == 0)
+ RETURN_FAIL("ClearCommError() failed");
+ RETURN_VALUE("%d", comstat.cbOutQue);
+#else
+ int bytes_waiting;
+ if (ioctl(port->fd, TIOCOUTQ, &bytes_waiting) < 0)
+ RETURN_FAIL("TIOCOUTQ ioctl failed");
+ RETURN_VALUE("%d", bytes_waiting);
+#endif
+}
+
#ifdef __linux__
static enum sp_return get_baudrate(int fd, int *baudrate)
{
case NOPARITY:
config->parity = SP_PARITY_NONE;
break;
+ case ODDPARITY:
+ config->parity = SP_PARITY_ODD;
+ break;
case EVENPARITY:
config->parity = SP_PARITY_EVEN;
break;
- case ODDPARITY:
- config->parity = SP_PARITY_ODD;
+ case MARKPARITY:
+ config->parity = SP_PARITY_MARK;
+ break;
+ case SPACEPARITY:
+ config->parity = SP_PARITY_SPACE;
break;
default:
config->parity = -1;
config->parity = SP_PARITY_NONE;
else if (!(data->term.c_cflag & PARENB) || (data->term.c_iflag & IGNPAR))
config->parity = -1;
+#ifdef CMSPAR
+ else if (data->term.c_cflag & CMSPAR)
+ config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_MARK : SP_PARITY_SPACE;
+#endif
else
config->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
if (config->parity >= 0) {
switch (config->parity) {
- /* Note: There's also SPACEPARITY, MARKPARITY (unneeded so far). */
case SP_PARITY_NONE:
data->dcb.Parity = NOPARITY;
break;
+ case SP_PARITY_ODD:
+ data->dcb.Parity = ODDPARITY;
+ break;
case SP_PARITY_EVEN:
data->dcb.Parity = EVENPARITY;
break;
- case SP_PARITY_ODD:
- data->dcb.Parity = ODDPARITY;
+ case SP_PARITY_MARK:
+ data->dcb.Parity = MARKPARITY;
+ break;
+ case SP_PARITY_SPACE:
+ data->dcb.Parity = SPACEPARITY;
break;
default:
RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
if (config->parity >= 0) {
data->term.c_iflag &= ~IGNPAR;
data->term.c_cflag &= ~(PARENB | PARODD);
+#ifdef CMSPAR
+ data->term.c_cflag &= ~CMSPAR;
+#endif
switch (config->parity) {
case SP_PARITY_NONE:
data->term.c_iflag |= IGNPAR;
case SP_PARITY_ODD:
data->term.c_cflag |= PARENB | PARODD;
break;
+#ifdef CMSPAR
+ case SP_PARITY_MARK:
+ data->term.c_cflag |= PARENB | PARODD;
+ data->term.c_cflag |= CMSPAR;
+ break;
+ case SP_PARITY_SPACE:
+ data->term.c_cflag |= PARENB;
+ data->term.c_cflag |= CMSPAR;
+ break;
+#else
+ case SP_PARITY_MARK:
+ case SP_PARITY_SPACE:
+ RETURN_ERROR(SP_ERR_SUPP, "Mark/space parity not supported");
+#endif
default:
RETURN_ERROR(SP_ERR_ARG, "Invalid parity setting");
}
}
}
- if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
+ if (tcsetattr(port->fd, TCSANOW, &data->term) < 0)
RETURN_FAIL("tcsetattr() failed");
#ifdef __APPLE__
RETURN_OK();
}
+enum sp_return sp_new_config(struct sp_port_config **config_ptr)
+{
+ struct sp_port_config *config;
+
+ TRACE("%p", config_ptr);
+
+ if (!config_ptr)
+ RETURN_ERROR(SP_ERR_ARG, "Null result pointer");
+
+ *config_ptr = NULL;
+
+ if (!(config = malloc(sizeof(struct sp_port_config))))
+ RETURN_ERROR(SP_ERR_MEM, "config malloc failed");
+
+ config->baudrate = -1;
+ config->bits = -1;
+ config->parity = -1;
+ config->stopbits = -1;
+ config->rts = -1;
+ config->cts = -1;
+ config->dtr = -1;
+ config->dsr = -1;
+
+ *config_ptr = config;
+
+ RETURN_OK();
+}
+
+void sp_free_config(struct sp_port_config *config)
+{
+ TRACE("%p", config);
+
+ if (!config)
+ DEBUG("Null config");
+ else
+ free(config);
+
+ RETURN();
+}
+
+enum sp_return sp_get_config(struct sp_port *port, struct sp_port_config *config)
+{
+ struct port_data data;
+
+ TRACE("%p, %p", port, config);
+
+ CHECK_OPEN_PORT();
+
+ if (!config)
+ RETURN_ERROR(SP_ERR_ARG, "Null config");
+
+ TRY(get_config(port, &data, config));
+
+ RETURN_OK();
+}
+
enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
{
struct port_data data;
RETURN_OK();
}
-#define CREATE_SETTER(x, type) int sp_set_##x(struct sp_port *port, type x) { \
+#define CREATE_ACCESSORS(x, type) \
+enum sp_return sp_set_##x(struct sp_port *port, type x) { \
struct port_data data; \
struct sp_port_config config; \
TRACE("%p, %d", port, x); \
config.x = x; \
TRY(set_config(port, &data, &config)); \
RETURN_OK(); \
+} \
+enum sp_return sp_get_config_##x(const struct sp_port_config *config, type *x) { \
+ TRACE("%p, %p", config, x); \
+ if (!config) \
+ RETURN_ERROR(SP_ERR_ARG, "Null config"); \
+ *x = config->x; \
+ RETURN_OK(); \
+} \
+enum sp_return sp_set_config_##x(struct sp_port_config *config, type x) { \
+ TRACE("%p, %d", config, x); \
+ if (!config) \
+ RETURN_ERROR(SP_ERR_ARG, "Null config"); \
+ config->x = x; \
+ RETURN_OK(); \
}
-CREATE_SETTER(baudrate, int)
-CREATE_SETTER(bits, int)
-CREATE_SETTER(parity, enum sp_parity)
-CREATE_SETTER(stopbits, int)
-CREATE_SETTER(rts, enum sp_rts)
-CREATE_SETTER(cts, enum sp_cts)
-CREATE_SETTER(dtr, enum sp_dtr)
-CREATE_SETTER(dsr, enum sp_dsr)
-CREATE_SETTER(xon_xoff, enum sp_xonxoff)
-
-enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
+CREATE_ACCESSORS(baudrate, int)
+CREATE_ACCESSORS(bits, int)
+CREATE_ACCESSORS(parity, enum sp_parity)
+CREATE_ACCESSORS(stopbits, int)
+CREATE_ACCESSORS(rts, enum sp_rts)
+CREATE_ACCESSORS(cts, enum sp_cts)
+CREATE_ACCESSORS(dtr, enum sp_dtr)
+CREATE_ACCESSORS(dsr, enum sp_dsr)
+CREATE_ACCESSORS(xon_xoff, enum sp_xonxoff)
+
+enum sp_return sp_set_config_flowcontrol(struct sp_port_config *config, enum sp_flowcontrol flowcontrol)
{
- struct port_data data;
- struct sp_port_config config;
-
- TRACE("%p, %d", port, flowcontrol);
-
- CHECK_OPEN_PORT();
+ if (!config)
+ RETURN_ERROR(SP_ERR_ARG, "Null configuration");
if (flowcontrol > SP_FLOWCONTROL_DTRDSR)
RETURN_ERROR(SP_ERR_ARG, "Invalid flow control setting");
- TRY(get_config(port, &data, &config));
-
if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
- config.xon_xoff = SP_XONXOFF_INOUT;
+ config->xon_xoff = SP_XONXOFF_INOUT;
else
- config.xon_xoff = SP_XONXOFF_DISABLED;
+ config->xon_xoff = SP_XONXOFF_DISABLED;
if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
- config.rts = SP_RTS_FLOW_CONTROL;
- config.cts = SP_CTS_FLOW_CONTROL;
+ config->rts = SP_RTS_FLOW_CONTROL;
+ config->cts = SP_CTS_FLOW_CONTROL;
} else {
- if (config.rts == SP_RTS_FLOW_CONTROL)
- config.rts = SP_RTS_ON;
- config.cts = SP_CTS_IGNORE;
+ if (config->rts == SP_RTS_FLOW_CONTROL)
+ config->rts = SP_RTS_ON;
+ config->cts = SP_CTS_IGNORE;
}
if (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
- config.dtr = SP_DTR_FLOW_CONTROL;
- config.dsr = SP_DSR_FLOW_CONTROL;
+ config->dtr = SP_DTR_FLOW_CONTROL;
+ config->dsr = SP_DSR_FLOW_CONTROL;
} else {
- if (config.dtr == SP_DTR_FLOW_CONTROL)
- config.dtr = SP_DTR_ON;
- config.dsr = SP_DSR_IGNORE;
+ if (config->dtr == SP_DTR_FLOW_CONTROL)
+ config->dtr = SP_DTR_ON;
+ config->dsr = SP_DSR_IGNORE;
}
+ RETURN_OK();
+}
+
+enum sp_return sp_set_flowcontrol(struct sp_port *port, enum sp_flowcontrol flowcontrol)
+{
+ struct port_data data;
+ struct sp_port_config config;
+
+ TRACE("%p, %d", port, flowcontrol);
+
+ CHECK_OPEN_PORT();
+
+ TRY(get_config(port, &data, &config));
+
+ TRY(sp_set_config_flowcontrol(&config, flowcontrol));
+
TRY(set_config(port, &data, &config));
RETURN_OK();
*signals |= SP_SIG_CTS;
if (bits & MS_DSR_ON)
*signals |= SP_SIG_DSR;
- if (bits & MS_RING_ON)
- *signals |= SP_SIG_DCD;
if (bits & MS_RLSD_ON)
+ *signals |= SP_SIG_DCD;
+ if (bits & MS_RING_ON)
*signals |= SP_SIG_RI;
#else
int bits;
va_list args;
va_start(args, format);
if (getenv("LIBSERIALPORT_DEBUG")) {
- fputs("libserialport: ", stderr);
+ fputs("sp: ", stderr);
vfprintf(stderr, format, args);
}
va_end(args);
projects / libserialport.git / blobdiff