#include "libserialport.h"
-struct sp_port_data {
+struct port_data {
#ifdef _WIN32
DCB dcb;
#else
struct termios term;
- int rts;
- int cts;
- int dtr;
- int dsr;
+ int controlbits;
+#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
};
-/* 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)
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+#define NUM_STD_BAUDRATES ARRAY_SIZE(std_baudrates)
+
+/* 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);
+static enum sp_return get_config(struct sp_port *port, struct port_data *data,
+ struct sp_port_config *config);
+static enum sp_return set_config(struct sp_port *port, struct port_data *data,
+ const struct sp_port_config *config);
+
+enum sp_return sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
{
struct sp_port *port;
int len;
memcpy(port->name, portname, len);
+#ifdef _WIN32
+ port->hdl = INVALID_HANDLE_VALUE;
+#else
+ port->fd = -1;
+#endif
+
*port_ptr = port;
return SP_OK;
}
-int sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
+enum sp_return sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr)
{
if (!copy_ptr)
return SP_ERR_ARG;
free(port);
}
-static struct sp_port **sp_list_append(struct sp_port **list, const char *portname)
+static struct sp_port **list_append(struct sp_port **list, const char *portname)
{
void *tmp;
unsigned int count;
return NULL;
}
-int sp_list_ports(struct sp_port ***list_ptr)
+enum sp_return sp_list_ports(struct sp_port ***list_ptr)
{
struct sp_port **list;
int ret = SP_OK;
#else
strcpy(name, data);
#endif
- if (type == REG_SZ && !(list = sp_list_append(list, name)))
+ if (type == REG_SZ && !(list = list_append(list, name)))
{
ret = SP_ERR_MEM;
goto out;
result = CFStringGetCString(cf_path,
path, PATH_MAX, kCFStringEncodingASCII);
CFRelease(cf_path);
- if (result && !(list = sp_list_append(list, path)))
+ if (result && !(list = list_append(list, path)))
{
ret = SP_ERR_MEM;
IOObjectRelease(port);
if (serial_info.type == PORT_UNKNOWN)
goto skip;
}
- list = sp_list_append(list, name);
+ list = list_append(list, name);
skip:
udev_device_unref(ud_dev);
if (!list)
free(list);
}
-static int sp_validate_port(struct sp_port *port)
+static enum sp_return validate_port(struct sp_port *port)
{
if (port == NULL)
return 0;
return 1;
}
-#define CHECK_PORT() do { if (!sp_validate_port(port)) return SP_ERR_ARG; } while (0)
+#define CHECK_PORT() do { if (!validate_port(port)) return SP_ERR_ARG; } while (0)
-int sp_open(struct sp_port *port, int flags)
+enum sp_return sp_open(struct sp_port *port, enum sp_mode flags)
{
if (!port)
return SP_ERR_ARG;
return SP_ERR_FAIL;
#else
int flags_local = 0;
- struct sp_port_data data;
+ struct port_data data;
+ struct sp_port_config config;
+ int ret;
/* Map 'flags' to the OS-specific settings. */
if (flags & SP_MODE_RDWR)
if ((port->fd = open(port->name, flags_local)) < 0)
return SP_ERR_FAIL;
- start_config(port, &data);
+ ret = get_config(port, &data, &config);
+
+ if (ret < 0)
+ {
+ sp_close(port);
+ return ret;
+ }
/* Turn off all serial port cooking. */
data.term.c_iflag &= ~(ISTRIP | INLCR | ICRNL);
/* Ignore modem status lines; enable receiver */
data.term.c_cflag |= (CLOCAL | CREAD);
- apply_config(port, &data);
+ ret = set_config(port, &data, &config);
+
+ if (ret < 0)
+ {
+ sp_close(port);
+ return ret;
+ }
#endif
return SP_OK;
}
-int sp_close(struct sp_port *port)
+enum sp_return sp_close(struct sp_port *port)
{
CHECK_PORT();
/* Returns non-zero upon success, 0 upon failure. */
if (CloseHandle(port->hdl) == 0)
return SP_ERR_FAIL;
+ port->hdl = INVALID_HANDLE_VALUE;
#else
/* Returns 0 upon success, -1 upon failure. */
if (close(port->fd) == -1)
return SP_ERR_FAIL;
+ port->fd = -1;
#endif
return SP_OK;
}
-int sp_flush(struct sp_port *port)
+enum sp_return sp_flush(struct sp_port *port)
{
CHECK_PORT();
return SP_OK;
}
-int sp_write(struct sp_port *port, const void *buf, size_t count)
+enum sp_return sp_write(struct sp_port *port, const void *buf, size_t count)
{
CHECK_PORT();
#endif
}
-int sp_read(struct sp_port *port, void *buf, size_t count)
+enum sp_return sp_read(struct sp_port *port, void *buf, size_t count)
{
CHECK_PORT();
#endif
}
-static int start_config(struct sp_port *port, struct sp_port_data *data)
+static enum sp_return get_config(struct sp_port *port, struct port_data *data,
+ struct sp_port_config *config)
{
- CHECK_PORT();
+ unsigned int i;
+
#ifdef _WIN32
if (!GetCommState(port->hdl, &data->dcb))
return SP_ERR_FAIL;
-#else
- int controlbits;
-
- 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;
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (data->dcb.BaudRate == std_baudrates[i].index) {
+ config->baudrate = std_baudrates[i].value;
+ break;
+ }
}
- data->dtr = (controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
- data->dsr = SP_DSR_IGNORE;
-#endif
- return SP_OK;
-}
+ 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;
-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:
- data->dcb.BaudRate = CBR_110;
- break;
- case 300:
- data->dcb.BaudRate = CBR_300;
- break;
- case 600:
- data->dcb.BaudRate = CBR_600;
- break;
- case 1200:
- data->dcb.BaudRate = CBR_1200;
- break;
- case 2400:
- data->dcb.BaudRate = CBR_2400;
- break;
- case 4800:
- data->dcb.BaudRate = CBR_4800;
- break;
- case 9600:
- data->dcb.BaudRate = CBR_9600;
- break;
- case 14400:
- data->dcb.BaudRate = CBR_14400; /* Not available on Unix? */
- break;
- case 19200:
- data->dcb.BaudRate = CBR_19200;
+ switch (data->dcb.StopBits) {
+ case ONESTOPBIT:
+ config->stopbits = 1;
break;
- case 38400:
- data->dcb.BaudRate = CBR_38400;
- break;
- case 57600:
- data->dcb.BaudRate = CBR_57600;
- break;
- case 115200:
- data->dcb.BaudRate = CBR_115200;
- break;
- case 128000:
- data->dcb.BaudRate = CBR_128000; /* Not available on Unix? */
- break;
- case 256000:
- data->dcb.BaudRate = CBR_256000; /* Not available on Unix? */
+ case TWOSTOPBITS:
+ config->stopbits = 2;
break;
default:
- return SP_ERR_ARG;
+ config->stopbits = -1;
}
-#else
- speed_t baud;
- switch (baudrate) {
- case 50:
- baud = B50;
- break;
- case 75:
- baud = B75;
- break;
- case 110:
- baud = B110;
- break;
- case 134:
- baud = B134;
- break;
- case 150:
- baud = B150;
- break;
- case 200:
- baud = B200;
- break;
- case 300:
- baud = B300;
- break;
- case 600:
- baud = B600;
- break;
- case 1200:
- baud = B1200;
- break;
- case 1800:
- baud = B1800;
- break;
- case 2400:
- baud = B2400;
- break;
- case 4800:
- baud = B4800;
- break;
- case 9600:
- baud = B9600;
- break;
- case 19200:
- baud = B19200;
- break;
- case 38400:
- baud = B38400;
- break;
- case 57600:
- baud = B57600;
- break;
- case 115200:
- baud = B115200;
- break;
- case 230400:
- baud = B230400;
- break;
-#if !defined(__APPLE__) && !defined(__OpenBSD__)
- case 460800:
- baud = B460800;
- break;
-#endif
- default:
- return SP_ERR_ARG;
+
+ 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;
}
- if (cfsetospeed(&data->term, baud) < 0)
+ 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;
+
+ if (data->dcb.fInX) {
+ if (data->dcb.fOutX)
+ config->xon_xoff = SP_XONXOFF_INOUT;
+ else
+ config->xon_xoff = SP_XONXOFF_IN;
+ } else {
+ if (data->dcb.fOutX)
+ config->xon_xoff = SP_XONXOFF_OUT;
+ else
+ config->xon_xoff = SP_XONXOFF_DISABLED;
+ }
+
+#else // !_WIN32
+
+ if (tcgetattr(port->fd, &data->term) < 0)
return SP_ERR_FAIL;
- if (cfsetispeed(&data->term, baud) < 0)
+ if (ioctl(port->fd, TIOCMGET, &data->controlbits) < 0)
return SP_ERR_FAIL;
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (cfgetispeed(&data->term) == std_baudrates[i].index) {
+ config->baudrate = std_baudrates[i].value;
+ break;
+ }
+ }
-#endif
- return SP_OK;
-}
+ if (i == NUM_STD_BAUDRATES)
+ config->baudrate = -1;
-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;
+ switch (data->term.c_cflag & CSIZE) {
+ case CS8:
+ config->bits = 8;
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;
+ case CS7:
+ config->bits = 7;
break;
- case SP_PARITY_EVEN:
- data->dcb.Parity = EVENPARITY;
+ case CS6:
+ config->bits = 6;
break;
- case SP_PARITY_ODD:
- data->dcb.Parity = ODDPARITY;
+ case CS5:
+ config->bits = 5;
break;
default:
- return SP_ERR_ARG;
+ config->bits = -1;
}
-#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;
+
+ 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
+
return SP_OK;
}
-static int set_stopbits(struct sp_port_data *data, int stopbits)
+static enum sp_return set_config(struct sp_port *port, struct port_data *data,
+ const struct sp_port_config *config)
{
+ unsigned int i;
+
#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;
+ if (config->baudrate >= 0)
+ {
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (config->baudrate == std_baudrates[i].value) {
+ data->dcb.BaudRate = std_baudrates[i].index;
+ break;
+ }
+ }
+
+ if (i == NUM_STD_BAUDRATES)
+ data->dcb.BaudRate = config->baudrate;
}
-#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;
+
+ if (config->bits >= 0)
+ data->dcb.ByteSize = config->bits;
+
+ 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_EVEN:
+ data->dcb.Parity = EVENPARITY;
+ break;
+ case SP_PARITY_ODD:
+ data->dcb.Parity = ODDPARITY;
+ 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;
+ if (config->stopbits >= 0) {
+ switch (config->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->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;
+ if (config->rts >= 0) {
+ switch (config->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->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;
+ if (config->cts >= 0) {
+ switch (config->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->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;
+ if (config->dtr >= 0) {
+ switch (config->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->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;
+ if (config->dsr >= 0) {
+ switch (config->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->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;
+
+ if (config->xon_xoff >= 0) {
+ switch (config->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;
+ }
}
-#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;
+#else // !_WIN32
- /* 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 (config->baudrate >= 0)
+ {
+ for (i = 0; i < NUM_STD_BAUDRATES; i++) {
+ if (config->baudrate == std_baudrates[i].value) {
+ 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;
+ break;
+ }
+ }
- if (data->rts == SP_RTS_FLOW_CONTROL)
- data->term.c_iflag |= CRTSCTS;
- else
+ if (i == NUM_STD_BAUDRATES)
+ return SP_ERR_ARG;
+ }
+
+ if (config->bits >= 0) {
+ data->term.c_cflag &= ~CSIZE;
+ switch (config->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;
+ }
+ }
+
+ if (config->parity >= 0) {
+ data->term.c_iflag &= ~IGNPAR;
+ data->term.c_cflag &= ~(PARENB | PARODD);
+ switch (config->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;
+ }
+ }
+
+ if (config->stopbits >= 0) {
+ data->term.c_cflag &= ~CSTOPB;
+ switch (config->stopbits) {
+ case 1:
+ data->term.c_cflag &= ~CSTOPB;
+ break;
+ case 2:
+ data->term.c_cflag |= CSTOPB;
+ break;
+ default:
+ return SP_ERR_ARG;
+ }
+ }
+
+ 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;
+ }
+ } 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->rts >= 0) {
+ if (config->rts == SP_RTS_FLOW_CONTROL) {
+ data->term.c_iflag |= CRTSCTS;
+ } else {
+ int 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)
{
- controlbits = TIOCM_RTS;
- if (ioctl(port->fd, data->rts == SP_RTS_ON ? TIOCMBIS : TIOCMBIC,
- &controlbits) < 0)
- return SP_ERR_FAIL;
+ /* 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 (config->dtr >= 0) {
+ int controlbits = TIOCM_DTR;
+ if (ioctl(port->fd, config->dtr == SP_DTR_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;
+ if (config->xon_xoff >= 0) {
+ data->term.c_iflag &= ~(IXON | IXOFF | IXANY);
+ switch (config->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;
+ }
+ }
- /* 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)
+enum sp_return sp_set_config(struct sp_port *port, const 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));
+ struct port_data data;
+ struct sp_port_config prev_config;
+
+ CHECK_PORT();
+
+ if (!config)
+ return SP_ERR_ARG;
+
+ TRY(get_config(port, &data, &prev_config));
+ TRY(set_config(port, &data, config));
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)); \
+#define CREATE_SETTER(x, type) int sp_set_##x(struct sp_port *port, type x) { \
+ struct port_data data; \
+ struct sp_port_config config; \
+ CHECK_PORT(); \
+ TRY(get_config(port, &data, &config)); \
+ config.x = x; \
+ TRY(set_config(port, &data, &config)); \
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)
+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)
+{
+ struct port_data data;
+ struct sp_port_config config;
+
+ CHECK_PORT();
+
+ TRY(get_config(port, &data, &config));
+
+ if (flowcontrol == SP_FLOWCONTROL_XONXOFF)
+ config.xon_xoff = SP_XONXOFF_INOUT;
+ else
+ config.xon_xoff = SP_XONXOFF_DISABLED;
+
+ if (flowcontrol == SP_FLOWCONTROL_RTSCTS) {
+ 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 (flowcontrol == SP_FLOWCONTROL_DTRDSR) {
+ 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;
+ }
+
+ TRY(set_config(port, &data, &config));
+
+ return SP_OK;
+}
int sp_last_error_code(void)
{
projects / libserialport.git / blobdiff