#else
struct termios term;
int controlbits;
- int rts;
- int cts;
- int dtr;
- int dsr;
#endif
};
#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);
+static int get_config(struct sp_port *port, struct sp_port_data *data, struct sp_port_config *config);
+static int set_config(struct sp_port *port, struct sp_port_data *data, struct sp_port_config *config);
int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr)
{
#else
int flags_local = 0;
struct sp_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;
#endif
}
-static int start_config(struct sp_port *port, struct sp_port_data *data)
-{
- CHECK_PORT();
-#ifdef _WIN32
- if (!GetCommState(port->hdl, &data->dcb))
- return SP_ERR_FAIL;
-#else
- if (tcgetattr(port->fd, &data->term) < 0)
- return SP_ERR_FAIL;
-
- if (ioctl(port->fd, TIOCMGET, &data->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 = (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)
+static int get_config(struct sp_port *port, struct sp_port_data *data, struct sp_port_config *config)
{
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 7:
- 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;
-}
-
-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:
- data->dcb.StopBits = ONESTOPBIT;
- break;
- case 2:
- data->dcb.StopBits = TWOSTOPBITS;
- break;
- default:
- return SP_ERR_ARG;
- }
-#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;
- }
-#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;
- }
-#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;
- }
-#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;
- }
-#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;
- }
-#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;
- }
-#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;
-
- /* 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, data->rts == SP_RTS_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;
-
- /* Write the configured settings. */
- if (tcsetattr(port->fd, TCSADRAIN, &data->term) < 0)
+ if (!GetCommState(port->hdl, &data->dcb))
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) {
+ if (data->dcb.BaudRate == std_baudrates[i].index) {
config->baudrate = std_baudrates[i].value;
break;
}
if (i == NUM_STD_BAUDRATES)
/* BaudRate field can be either an index or a custom baud rate. */
- config->baudrate = data.dcb.BaudRate;
+ config->baudrate = data->dcb.BaudRate;
- config->bits = data.dcb.ByteSize;
+ config->bits = data->dcb.ByteSize;
- if (data.dcb.fParity)
- switch (data.dcb.Parity) {
+ if (data->dcb.fParity)
+ switch (data->dcb.Parity) {
case NOPARITY:
config->parity = SP_PARITY_NONE;
break;
else
config->parity = SP_PARITY_NONE;
- switch (data.dcb.StopBits) {
+ switch (data->dcb.StopBits) {
case ONESTOPBIT:
config->stopbits = 1;
break;
config->stopbits = -1;
}
- switch (data.dcb.fRtsControl) {
+ switch (data->dcb.fRtsControl) {
case RTS_CONTROL_DISABLE:
config->rts = SP_RTS_OFF;
break;
config->rts = -1;
}
- config->cts = data.dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
+ config->cts = data->dcb.fOutxCtsFlow ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE;
- switch (data.dcb.fDtrControl) {
+ switch (data->dcb.fDtrControl) {
case DTR_CONTROL_DISABLE:
config->dtr = SP_DTR_OFF;
break;
config->dtr = -1;
}
- config->dsr = data.dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
-#else
+ config->dsr = data->dcb.fOutxDsrFlow ? SP_DSR_FLOW_CONTROL : SP_DSR_IGNORE;
+
+#else // !_WIN32
+
+ if (tcgetattr(port->fd, &data->term) < 0)
+ return SP_ERR_FAIL;
+
+ 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) {
+ 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) {
+ switch (data->term.c_cflag & CSIZE) {
case CS8:
config->bits = 8;
break;
config->bits = -1;
}
- if (!(data.term.c_cflag & PARENB) && (data.term.c_iflag & IGNPAR))
+ 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))
+ 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->parity = (data->term.c_cflag & PARODD) ? SP_PARITY_ODD : SP_PARITY_EVEN;
- config->stopbits = (data.term.c_cflag & CSTOPB) ? 2 : 1;
+ config->stopbits = (data->term.c_cflag & CSTOPB) ? 2 : 1;
- if (data.term.c_cflag & CRTSCTS) {
+ 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->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->dtr = (data->controlbits & TIOCM_DTR) ? SP_DTR_ON : SP_DTR_OFF;
config->dsr = SP_DSR_IGNORE;
#endif
return SP_OK;
}
-int sp_set_flowcontrol(struct sp_port *port, int flowcontrol)
+static int set_config(struct sp_port *port, struct sp_port_data *data, struct sp_port_config *config)
{
- struct sp_port_data data;
+ unsigned int i;
- TRY(start_config(port, &data));
+#ifdef _WIN32
+ 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 (flowcontrol == SP_FLOWCONTROL_XONXOFF)
- TRY_SET(xon_xoff, SP_XONXOFF_INOUT);
- else
- TRY_SET(xon_xoff, SP_XONXOFF_DISABLED);
+ if (i == NUM_STD_BAUDRATES)
+ data->dcb.BaudRate = config->baudrate;
+ }
- 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 (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;
+ }
}
- 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);
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ 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;
+ }
}
- TRY(apply_config(port, &data));
+ 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;
+ }
+ }
+
+ if (!SetCommState(port->hdl, &data->dcb))
+ return SP_ERR_FAIL;
+
+#else // !_WIN32
+
+ 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 (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)
+ {
+ /* 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;
+ }
+ }
+
+ 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;
+ }
+ }
+
+ 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)
+
+int sp_set_config(struct sp_port *port, struct sp_port_config *config)
+{
+ struct sp_port_data data;
+ struct sp_port_config prev_config;
+
+ 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)); \
+ struct sp_port_config config; \
+ TRY(get_config(port, &data, &config)); \
+ config.x = x; \
+ TRY(set_config(port, &data, &config)); \
return SP_OK; \
}
CREATE_SETTER(dsr)
CREATE_SETTER(xon_xoff)
+int sp_set_flowcontrol(struct sp_port *port, int flowcontrol)
+{
+ struct sp_port_data data;
+ struct sp_port_config config;
+
+ 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)
{
#ifdef _WIN32
projects / libserialport.git / commitdiff