* 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>
+ * Copyright (C) 2013 Matthias Heidbrink <m-sigrok@heidbrink.biz>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
+#include <stdio.h>
+#include <stdarg.h>
#ifdef _WIN32
#include <windows.h>
#include <tchar.h>
#ifdef __APPLE__
#include <IOKit/IOKitLib.h>
#include <IOKit/serial/IOSerialKeys.h>
+#include <IOKit/serial/ioss.h>
#include <sys/syslimits.h>
#endif
#ifdef __linux__
#include "libudev.h"
#include "linux/serial.h"
+#include "linux_termios.h"
+#if defined(TCGETX) && defined(TCSETX) && defined(HAVE_TERMIOX)
+#define USE_TERMIOX
+#endif
+#endif
+
+#ifndef _WIN32
+#include "linux_termios.h"
#endif
#include "libserialport.h"
#else
struct termios term;
int controlbits;
+ int termiox_supported;
+ int flow;
#endif
};
#endif
};
+void (*sp_debug_handler)(const char *format, ...) = sp_default_debug_handler;
+
#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
+#define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
+
/* Helper functions. */
static enum sp_return validate_port(struct sp_port *port);
static struct sp_port **list_append(struct sp_port **list, const char *portname);
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)
+ 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;
int ret;
/* Map 'flags' to the OS-specific settings. */
- if (flags & SP_MODE_RDWR)
+ if (flags & (SP_MODE_READ | SP_MODE_WRITE))
flags_local |= O_RDWR;
- if (flags & SP_MODE_RDONLY)
+ else if (flags & SP_MODE_READ)
flags_local |= O_RDONLY;
+ else if (flags & SP_MODE_WRITE)
+ flags_local |= O_WRONLY;
if (flags & SP_MODE_NONBLOCK)
flags_local |= O_NONBLOCK;
return SP_OK;
}
-enum sp_return sp_flush(struct sp_port *port)
+enum sp_return sp_flush(struct sp_port *port, enum sp_buffer buffers)
+{
+ CHECK_PORT();
+
+#ifdef _WIN32
+ DWORD flags = 0;
+ if (buffers & SP_BUF_INPUT)
+ flags |= PURGE_RXCLEAR;
+ if (buffers & SP_BUF_OUTPUT)
+ flags |= PURGE_TXCLEAR;
+
+ /* Returns non-zero upon success, 0 upon failure. */
+ if (PurgeComm(port->hdl, flags) == 0)
+ return SP_ERR_FAIL;
+#else
+ int flags = 0;
+ if (buffers & SP_BUF_BOTH)
+ flags = TCIOFLUSH;
+ else if (buffers & SP_BUF_INPUT)
+ flags = TCIFLUSH;
+ else if (buffers & SP_BUF_OUTPUT)
+ flags = TCOFLUSH;
+
+ /* Returns 0 upon success, -1 upon failure. */
+ if (tcflush(port->fd, flags) < 0)
+ return SP_ERR_FAIL;
+#endif
+ return SP_OK;
+}
+
+enum sp_return sp_drain(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)
+ if (FlushFileBuffers(port->hdl) == 0)
return SP_ERR_FAIL;
#else
/* Returns 0 upon success, -1 upon failure. */
- if (tcflush(port->fd, TCIOFLUSH) < 0)
+ if (tcdrain(port->fd) < 0)
return SP_ERR_FAIL;
#endif
+
return SP_OK;
}
#endif
}
+#ifdef __linux__
+static enum sp_return get_baudrate(int fd, int *baudrate)
+{
+ void *data;
+
+ if (!(data = malloc(get_termios_size())))
+ return SP_ERR_MEM;
+
+ if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
+ free(data);
+ return SP_ERR_FAIL;
+ }
+
+ *baudrate = get_termios_speed(data);
+
+ free(data);
+
+ return SP_OK;
+}
+
+static enum sp_return set_baudrate(int fd, int baudrate)
+{
+ void *data;
+
+ if (!(data = malloc(get_termios_size())))
+ return SP_ERR_MEM;
+
+ if (ioctl(fd, get_termios_get_ioctl(), data) < 0) {
+ free(data);
+ return SP_ERR_FAIL;
+ }
+
+ set_termios_speed(data, baudrate);
+
+ if (ioctl(fd, get_termios_set_ioctl(), data) < 0) {
+ free(data);
+ return SP_ERR_FAIL;
+ }
+
+ free(data);
+
+ return SP_OK;
+}
+
+#ifdef USE_TERMIOX
+static enum sp_return get_flow(int fd, int *flow)
+{
+ void *data;
+
+ if (!(data = malloc(get_termiox_size())))
+ return SP_ERR_MEM;
+
+ if (ioctl(fd, TCGETX, data) < 0) {
+ free(data);
+ return SP_ERR_FAIL;
+ }
+
+ *flow = get_termiox_flow(data);
+
+ free(data);
+
+ return SP_OK;
+}
+
+static enum sp_return set_flow(int fd, int flow)
+{
+ void *data;
+
+ if (!(data = malloc(get_termiox_size())))
+ return SP_ERR_MEM;
+
+ if (ioctl(fd, TCGETX, data) < 0) {
+ free(data);
+ return SP_ERR_FAIL;
+ }
+
+ set_termiox_flow(data, flow);
+
+ if (ioctl(fd, TCSETX, data) < 0) {
+ free(data);
+ return SP_ERR_FAIL;
+ }
+
+ free(data);
+
+ return SP_OK;
+}
+#endif /* USE_TERMIOX */
+#endif /* __linux__ */
+
static enum sp_return get_config(struct sp_port *port, struct port_data *data,
struct sp_port_config *config)
{
if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
return SP_ERR_FAIL;
+
+#ifdef USE_TERMIOX
+ int ret = get_flow(port->fd, &data->flow);
+
+ if (ret == SP_ERR_FAIL && errno == EINVAL)
+ data->termiox_supported = 0;
+ else if (ret < 0)
+ return ret;
+ else
+ data->termiox_supported = 1;
+#else
+ data->termiox_supported = 0;
+#endif
+
for (i = 0; i < NUM_STD_BAUDRATES; i++) {
if (cfgetispeed(&data->term) == std_baudrates[i].index) {
config->baudrate = std_baudrates[i].value;
}
}
- if (i == NUM_STD_BAUDRATES)
+ if (i == NUM_STD_BAUDRATES) {
+#ifdef __APPLE__
+ config->baudrate = (int)data->term.c_ispeed;
+#elif defined(__linux__)
+ TRY(get_baudrate(port->fd, &config->baudrate));
+#else
config->baudrate = -1;
+#endif
+ }
switch (data->term.c_cflag & CSIZE) {
case CS8:
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;
+ if (data->termiox_supported && data->flow & RTS_FLOW)
+ config->rts = SP_RTS_FLOW_CONTROL;
+ else
+ config->rts = (data->controlbits & TIOCM_RTS) ? SP_RTS_ON : SP_RTS_OFF;
+
+ config->cts = (data->termiox_supported && data->flow & CTS_FLOW) ?
+ SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
}
- config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
- config->dsr = SP_DSR_IGNORE;
+ if (data->termiox_supported && data->flow & DTR_FLOW)
+ config->dtr = SP_DTR_FLOW_CONTROL;
+ else
+ config->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
+
+ config->dsr = (data->termiox_supported && data->flow & DSR_FLOW) ?
+ SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
if (data->term.c_iflag & IXOFF) {
if (data->term.c_iflag & IXON)
return SP_OK;
}
-static enum sp_return set_config(struct sp_port *port, struct port_data *data,
+static enum sp_return set_config(struct sp_port *port, struct port_data *data,
const struct sp_port_config *config)
{
unsigned int i;
+#ifdef __APPLE__
+ BAUD_TYPE baud_nonstd;
+
+ baud_nonstd = B0;
+#endif
+#ifdef __linux__
+ int baud_nonstd = 0;
+#endif
#ifdef _WIN32
if (config->baudrate >= 0) {
if (!SetCommState(port->hdl, &data->dcb))
return SP_ERR_FAIL;
-#else // !_WIN32
+#else /* !_WIN32 */
+
+ int controlbits;
if (config->baudrate >= 0) {
for (i = 0; i < NUM_STD_BAUDRATES; i++) {
}
}
- if (i == NUM_STD_BAUDRATES)
- return SP_ERR_ARG;
+ /* Non-standard baud rate */
+ if (i == NUM_STD_BAUDRATES) {
+#ifdef __APPLE__
+ /* Set "dummy" baud rate. */
+ if (cfsetspeed(&data->term, B9600) < 0)
+ return SP_ERR_FAIL;
+ baud_nonstd = config->baudrate;
+#elif defined(__linux__)
+ baud_nonstd = 1;
+#else
+ return SP_ERR_SUPP;
+#endif
+ }
}
if (config->bits >= 0) {
}
if (config->rts >= 0 || config->cts >= 0) {
- /* Asymmetric use of RTS/CTS not supported yet. */
-
- if (data->term.c_iflag & CRTSCTS) {
- /* Flow control can only be disabled for both RTS & CTS together. */
- if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
- if (config->cts != SP_CTS_IGNORE)
- return SP_ERR_ARG;
- }
- if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
- if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
- return SP_ERR_ARG;
+ if (data->termiox_supported) {
+ data->flow &= ~(RTS_FLOW | CTS_FLOW);
+ switch (config->rts) {
+ case SP_RTS_OFF:
+ case SP_RTS_ON:
+ controlbits = TIOCM_RTS;
+ if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
+ return SP_ERR_FAIL;
+ break;
+ case SP_RTS_FLOW_CONTROL:
+ data->flow |= RTS_FLOW;
+ break;
+ default:
+ break;
}
- } else {
- /* Flow control can only be enabled for both RTS & CTS together. */
- if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
- ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
- return SP_ERR_ARG;
- }
+ if (config->cts == SP_CTS_FLOW_CONTROL)
+ data->flow |= CTS_FLOW;
- if (config->rts >= 0) {
- if (config->rts == SP_RTS_FLOW_CONTROL) {
+ if (data->flow & (RTS_FLOW | CTS_FLOW))
data->term.c_iflag |= CRTSCTS;
+ else
+ data->term.c_iflag &= ~CRTSCTS;
+ } else {
+ /* Asymmetric use of RTS/CTS not supported. */
+ if (data->term.c_iflag & CRTSCTS) {
+ /* Flow control can only be disabled for both RTS & CTS together. */
+ if (config->rts >= 0 && config->rts != SP_RTS_FLOW_CONTROL) {
+ if (config->cts != SP_CTS_IGNORE)
+ return SP_ERR_SUPP;
+ }
+ if (config->cts >= 0 && config->cts != SP_CTS_FLOW_CONTROL) {
+ if (config->rts <= 0 || config->rts == SP_RTS_FLOW_CONTROL)
+ return SP_ERR_SUPP;
+ }
} else {
- int controlbits = TIOCM_RTS;
- if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
- &controlbits) < 0)
- return SP_ERR_FAIL;
+ /* Flow control can only be enabled for both RTS & CTS together. */
+ if (((config->rts == SP_RTS_FLOW_CONTROL) && (config->cts != SP_CTS_FLOW_CONTROL)) ||
+ ((config->cts == SP_CTS_FLOW_CONTROL) && (config->rts != SP_RTS_FLOW_CONTROL)))
+ return SP_ERR_SUPP;
+ }
+
+ if (config->rts >= 0) {
+ if (config->rts == SP_RTS_FLOW_CONTROL) {
+ data->term.c_iflag |= CRTSCTS;
+ } else {
+ controlbits = TIOCM_RTS;
+ if (ioctl(port->fd, config->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
+ &controlbits) < 0)
+ return SP_ERR_FAIL;
+ }
}
}
}
if (config->dtr >= 0 || config->dsr >= 0) {
- /* DTR/DSR flow control not supported yet. */
- if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
- return SP_ERR_ARG;
+ if (data->termiox_supported) {
+ data->flow &= ~(DTR_FLOW | DSR_FLOW);
+ switch (config->dtr) {
+ case SP_DTR_OFF:
+ case SP_DTR_ON:
+ controlbits = TIOCM_DTR;
+ if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC, &controlbits) < 0)
+ return SP_ERR_FAIL;
+ break;
+ case SP_DTR_FLOW_CONTROL:
+ data->flow |= DTR_FLOW;
+ break;
+ default:
+ break;
+ }
+ if (config->dsr == SP_DSR_FLOW_CONTROL)
+ data->flow |= DSR_FLOW;
+ } else {
+ /* DTR/DSR flow control not supported. */
+ if (config->dtr == SP_DTR_FLOW_CONTROL || config->dsr == SP_DSR_FLOW_CONTROL)
+ return SP_ERR_SUPP;
- if (config->dtr >= 0) {
- int controlbits = TIOCM_DTR;
- if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
- &controlbits) < 0)
- return SP_ERR_FAIL;
+ if (config->dtr >= 0) {
+ controlbits = TIOCM_DTR;
+ if (ioctl(port->fd, config->dtr == SP_DTR_ON ? TIOCMBIS : TIOCMBIC,
+ &controlbits) < 0)
+ return SP_ERR_FAIL;
+ }
}
}
if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
return SP_ERR_FAIL;
+
+#ifdef __APPLE__
+ if (baud_nonstd != B0) {
+ if (ioctl(port->fd, IOSSIOSPEED, &baud_nonstd) == -1)
+ return SP_ERR_FAIL;
+ /* Set baud rates in data->term to correct, but incompatible
+ * with tcsetattr() value, same as delivered by tcgetattr(). */
+ if (cfsetspeed(&data->term, baud_nonstd) < 0)
+ return SP_ERR_FAIL;
+ }
+#elif defined(__linux__)
+ if (baud_nonstd)
+ TRY(set_baudrate(port->fd, config->baudrate));
+#ifdef USE_TERMIOX
+ if (data->termiox_supported)
+ TRY(set_flow(port->fd, data->flow));
+#endif
#endif
+#endif /* !_WIN32 */
+
return SP_OK;
}
-#define TRY(x) do { int ret = x; if (ret != SP_OK) return ret; } while (0)
-
enum sp_return sp_set_config(struct sp_port *port, const struct sp_port_config *config)
{
struct port_data data;
return SP_OK;
}
+enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signals)
+{
+ CHECK_PORT();
+
+ if (!signals)
+ return SP_ERR_ARG;
+
+ *signals = 0;
+#ifdef _WIN32
+ DWORD bits;
+ if (GetCommModemStatus(port->hdl, &bits) == 0)
+ return SP_ERR_FAIL;
+ if (bits & MS_CTS_ON)
+ *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_RI;
+#else
+ int bits;
+ if (ioctl(port->fd, TIOCMGET, &bits) < 0)
+ return SP_ERR_FAIL;
+ if (bits & TIOCM_CTS)
+ *signals |= SP_SIG_CTS;
+ if (bits & TIOCM_DSR)
+ *signals |= SP_SIG_DSR;
+ if (bits & TIOCM_CAR)
+ *signals |= SP_SIG_DCD;
+ if (bits & TIOCM_RNG)
+ *signals |= SP_SIG_RI;
+#endif
+ return SP_OK;
+}
+
+enum sp_return sp_start_break(struct sp_port *port)
+{
+ CHECK_PORT();
+#ifdef _WIN32
+ if (SetCommBreak(port->hdl) == 0)
+ return SP_ERR_FAIL;
+#else
+ if (ioctl(port->fd, TIOCSBRK, 1) < 0)
+ return SP_ERR_FAIL;
+#endif
+
+ return SP_OK;
+}
+
+enum sp_return sp_end_break(struct sp_port *port)
+{
+ CHECK_PORT();
+#ifdef _WIN32
+ if (ClearCommBreak(port->hdl) == 0)
+ return SP_ERR_FAIL;
+#else
+ if (ioctl(port->fd, TIOCCBRK, 1) < 0)
+ return SP_ERR_FAIL;
+#endif
+
+ return SP_OK;
+}
+
int sp_last_error_code(void)
{
#ifdef _WIN32
(void)message;
#endif
}
+
+void sp_set_debug_handler(void (*handler)(const char *format, ...))
+{
+ sp_debug_handler = handler;
+}
+
+void sp_default_debug_handler(const char *format, ...)
+{
+ va_list args;
+ va_start(args, format);
+ if (getenv("LIBSERIALPORT_DEBUG")) {
+ fputs("libserialport: ", stderr);
+ vfprintf(stderr, format, args);
+ }
+ va_end(args);
+}
projects / libserialport.git / blobdiff