/** * Set serial parameters for the specified serial port. * * @param serial Previously initialized serial port structure. * @param[in] baudrate The baudrate to set. * @param[in] bits The number of data bits to use (5, 6, 7 or 8). * @param[in] parity The parity setting to use (0 = none, 1 = even, 2 = odd). * @param[in] stopbits The number of stop bits to use (1 or 2). * @param[in] flowcontrol The flow control settings to use (0 = none, * 1 = RTS/CTS, 2 = XON/XOFF). * @param[in] rts Status of RTS line (0 or 1; required by some interfaces). * @param[in] dtr Status of DTR line (0 or 1; required by some interfaces). * * @retval SR_OK Success. * @retval SR_ERR Failure. * * @private */ SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate, int bits, int parity, int stopbits, int flowcontrol, int rts, int dtr) { int ret; char *error; struct sp_port_config *config; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (!serial->data) { sr_dbg("Cannot configure unopened serial port %s.", serial->port); return SR_ERR; } sr_spew("Setting serial parameters on port %s.", serial->port); sp_new_config(&config); sp_set_config_baudrate(config, baudrate); sp_set_config_bits(config, bits); switch (parity) { case 0: sp_set_config_parity(config, SP_PARITY_NONE); break; case 1: sp_set_config_parity(config, SP_PARITY_EVEN); break; case 2: sp_set_config_parity(config, SP_PARITY_ODD); break; default: return SR_ERR_ARG; } sp_set_config_stopbits(config, stopbits); sp_set_config_rts(config, flowcontrol == 1 ? SP_RTS_FLOW_CONTROL : rts); sp_set_config_cts(config, flowcontrol == 1 ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE); sp_set_config_dtr(config, dtr); sp_set_config_dsr(config, SP_DSR_IGNORE); sp_set_config_xon_xoff(config, flowcontrol == 2 ? SP_XONXOFF_INOUT : SP_XONXOFF_DISABLED); ret = sp_set_config(serial->data, config); sp_free_config(config); switch (ret) { case SP_ERR_ARG: sr_err("Invalid arguments for setting serial port parameters."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Error setting serial port parameters (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return SR_ERR; } return SR_OK; }
/** * Write a number of bytes to the specified serial port. * * @param serial Previously initialized serial port structure. * @param buf Buffer containing the bytes to write. * @param count Number of bytes to write. * * @return The number of bytes written, or a negative error code upon failure. */ SR_PRIV int serial_write(struct sr_serial_dev_inst *serial, const void *buf, size_t count) { ssize_t ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (serial->fd == -1) { sr_dbg("Cannot use unopened serial port %s (fd %d).", serial->port, serial->fd); return SR_ERR; } ret = sp_write(serial->data, buf, count); switch (ret) { case SP_ERR_ARG: sr_err("Attempted serial port write with invalid arguments."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Write error: %s.", error); sp_free_error_message(error); return SR_ERR; } sr_spew("Wrote %d/%d bytes (fd %d).", ret, count, serial->fd); return ret; }
/** * Flush serial port buffers. * * @param serial Previously initialized serial port structure. * * @retval SR_OK Success. * @retval SR_ERR Failure. * * @private */ SR_PRIV int serial_flush(struct sr_serial_dev_inst *serial) { int ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (!serial->data) { sr_dbg("Cannot flush unopened serial port %s.", serial->port); return SR_ERR; } sr_spew("Flushing serial port %s.", serial->port); ret = sp_flush(serial->data, SP_BUF_BOTH); switch (ret) { case SP_ERR_ARG: sr_err("Attempt to flush an invalid serial port."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Error flushing port (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return SR_ERR; } return SR_OK; }
/** * Drain serial port buffers. * * @param serial Previously initialized serial port structure. * * @retval SR_OK Success. * @retval SR_ERR Failure. * * @private */ SR_PRIV int serial_drain(struct sr_serial_dev_inst *serial) { int ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (!serial->data) { sr_dbg("Cannot drain unopened serial port %s.", serial->port); return SR_ERR; } sr_spew("Draining serial port %s.", serial->port); ret = sp_drain(serial->data); if (ret == SP_ERR_FAIL) { error = sp_last_error_message(); sr_err("Error draining port (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return SR_ERR; } return SR_OK; }
static int _serial_write(struct serial_device_t *serial, const void *buf, size_t count, int nonblocking, unsigned int timeout_ms) { if (!serial) { log_error("serial_write: invalid serial port device."); return -DEVICE_CONN_ERROR; } if (!serial->data) { log_error("serial_write: cannot use unopened serial port %s.", serial->port); return -DEVICE_CONN_ERROR; } int ret; if (nonblocking) { ret = sp_nonblocking_write(serial->data, buf, count); } else { ret = sp_blocking_write(serial->data, buf, count, timeout_ms); } char *error; switch (ret) { case SP_ERR_ARG: log_error("serial_write: invalid serial port parameters."); return -DEVICE_CONF_ERROR; case SP_ERR_FAIL: error = sp_last_error_message(); log_error("serial_write: write error (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return -DEVICE_CONN_ERROR; } return ret; }
int serial_close(struct serial_device_t *serial) { if (!serial) { log_error("serial_close: invalid serial port device."); return -DEVICE_CONN_ERROR; } if (!serial->data) { log_error("serial_close: cannot close unopened serial port %s.", serial->port); return -DEVICE_CONN_ERROR; } log_info("serial_close: closing serial port %s.", serial->port); int ret = sp_close(serial->data); char *error; switch (ret) { case SP_ERR_ARG: log_error("serial_close: attempt to close an invalid serial port."); return -DEVICE_CONF_ERROR; case SP_ERR_FAIL: error = sp_last_error_message(); log_error("serial_close: error closing port (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return -DEVICE_CONN_ERROR; } sp_free_port(serial->data); serial->data = NULL; return NO_ERROR; }
int serial_read_nonblocking(struct serial_device_t *serial, void *buf, size_t count) { if (!serial) { log_error("serial_read_nonblocking: invalid serial port device."); return -DEVICE_CONN_ERROR; } if (!serial->data) { log_error("serial_read_nonblocking: cannot use unopened serial port %s.", serial->port); return -DEVICE_CONN_ERROR; } int ret = sp_nonblocking_read(serial->data, buf, count); char *error; switch (ret) { case SP_ERR_ARG: log_error("serial_read_nonblocking: invalid serial port parameters."); return -DEVICE_CONF_ERROR; case SP_ERR_FAIL: error = sp_last_error_message(); log_error("serial_read_nonblocking: read error (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return -DEVICE_CONN_ERROR; } return ret; }
int serial_set_params(struct serial_device_t *serial, int baudrate, int bits, int parity, int stopbits, int flowcontrol, int rts, int dtr) { if (!serial) { log_error("serial_set_params: invalid serial port device."); return -DEVICE_CONN_ERROR; } if (!serial->data) { log_error("serial_set_params: cannot configure unopened serial port %s.", serial->port); return -DEVICE_CONN_ERROR; } log_debug("serial_set_params: setting serial parameters on port %s.", serial->port); struct sp_port_config *config; sp_new_config(&config); sp_set_config_baudrate(config, baudrate); sp_set_config_bits(config, bits); sp_set_config_parity(config, parity); sp_set_config_stopbits(config, stopbits); sp_set_config_rts(config, flowcontrol == 1 ? SP_RTS_FLOW_CONTROL : rts); sp_set_config_cts(config, flowcontrol == 1 ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE); sp_set_config_dtr(config, dtr); sp_set_config_dsr(config, SP_DSR_IGNORE); sp_set_config_xon_xoff(config, flowcontrol == 2 ? SP_XONXOFF_INOUT : SP_XONXOFF_DISABLED); int ret = sp_set_config(serial->data, config); sp_free_config(config); char *error; switch (ret) { case SP_ERR_ARG: log_error("serial_set_params: invalid serial port parameters."); return -DEVICE_CONF_ERROR; case SP_ERR_FAIL: error = sp_last_error_message(); log_error("serial_set_params: error setting serial port parameters (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return -DEVICE_CONN_ERROR; } return NO_ERROR; }
/** * Set serial parameters for the specified serial port. * * @param serial Previously initialized serial port structure. * @param baudrate The baudrate to set. * @param bits The number of data bits to use. * @param parity The parity setting to use (0 = none, 1 = even, 2 = odd). * @param stopbits The number of stop bits to use (1 or 2). * @param flowcontrol The flow control settings to use (0 = none, 1 = RTS/CTS, * 2 = XON/XOFF). * * @return SR_OK upon success, SR_ERR upon failure. */ SR_PRIV int serial_set_params(struct sr_serial_dev_inst *serial, int baudrate, int bits, int parity, int stopbits, int flowcontrol, int rts, int dtr) { int ret; char *error; struct sp_port_config config; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (serial->fd == -1) { sr_dbg("Cannot configure unopened serial port %s (fd %d).", serial->port, serial->fd); return SR_ERR; } sr_spew("Setting serial parameters on port %s (fd %d).", serial->port, serial->fd); config.baudrate = baudrate; config.bits = bits; config.parity = parity; config.stopbits = stopbits; config.rts = flowcontrol == 1 ? SP_RTS_FLOW_CONTROL : rts; config.cts = flowcontrol == 1 ? SP_CTS_FLOW_CONTROL : SP_CTS_IGNORE; config.dtr = dtr; config.dsr = SP_DSR_IGNORE; config.xon_xoff = flowcontrol == 2 ? SP_XONXOFF_INOUT : SP_XONXOFF_DISABLED; ret = sp_set_config(serial->data, &config); switch (ret) { case SP_ERR_ARG: sr_err("Invalid arguments for setting serial port parameters."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Error setting serial port parameters: %s.", error); sp_free_error_message(error); return SR_ERR; } return SR_OK; }
/** * Open the specified serial port. * * @param serial Previously initialized serial port structure. * @param flags Flags to use when opening the serial port. Possible flags * include SERIAL_RDWR, SERIAL_RDONLY, SERIAL_NONBLOCK. * * If the serial structure contains a serialcomm string, it will be * passed to serial_set_paramstr() after the port is opened. * * @return SR_OK on success, SR_ERR on failure. */ SR_PRIV int serial_open(struct sr_serial_dev_inst *serial, int flags) { int ret; char *error; int sp_flags = 0; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } sr_spew("Opening serial port '%s' (flags %d).", serial->port, flags); sp_get_port_by_name(serial->port, &serial->data); if (flags & SERIAL_RDWR) sp_flags = (SP_MODE_READ | SP_MODE_WRITE); else if (flags & SERIAL_RDONLY) sp_flags = SP_MODE_READ; serial->nonblocking = (flags & SERIAL_NONBLOCK) ? 1 : 0; ret = sp_open(serial->data, sp_flags); switch (ret) { case SP_ERR_ARG: sr_err("Attempt to open serial port with invalid parameters."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Error opening port: %s.", error); sp_free_error_message(error); return SR_ERR; } #ifndef _WIN32 sp_get_port_handle(serial->data, &serial->fd); #endif if (serial->serialcomm) return serial_set_paramstr(serial, serial->serialcomm); else return SR_OK; }
/** * Read a number of bytes from the specified serial port. * * @param serial Previously initialized serial port structure. * @param buf Buffer where to store the bytes that are read. * @param count The number of bytes to read. * * @return The number of bytes read, or a negative error code upon failure. */ SR_PRIV int serial_read(struct sr_serial_dev_inst *serial, void *buf, size_t count) { ssize_t ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (serial->fd == -1) { sr_dbg("Cannot use unopened serial port %s (fd %d).", serial->port, serial->fd); return SR_ERR; } if (serial->nonblocking) ret = sp_nonblocking_read(serial->data, buf, count); else ret = sp_blocking_read(serial->data, buf, count, 0); switch (ret) { case SP_ERR_ARG: sr_err("Attempted serial port read with invalid arguments."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Read error: %s.", error); sp_free_error_message(error); return SR_ERR; } if (ret > 0) sr_spew("Read %d/%d bytes (fd %d).", ret, count, serial->fd); return ret; }
static int _serial_read(struct sr_serial_dev_inst *serial, void *buf, size_t count, int nonblocking, unsigned int timeout_ms) { ssize_t ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (!serial->data) { sr_dbg("Cannot use unopened serial port %s.", serial->port); return SR_ERR; } if (nonblocking) ret = sp_nonblocking_read(serial->data, buf, count); else ret = sp_blocking_read(serial->data, buf, count, timeout_ms); switch (ret) { case SP_ERR_ARG: sr_err("Attempted serial port read with invalid arguments."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Read error (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return SR_ERR; } if (ret > 0) sr_spew("Read %zd/%zu bytes.", ret, count); return ret; }
static int _serial_read(struct serial_device_t *serial, void *buf, size_t count, int nonblocking, unsigned int timeout_ms) { if (!serial) { log_error("serial_read_nonblocking: invalid serial port device."); return -DEVICE_CONN_ERROR; } if (!serial->data) { log_error("serial_read_nonblocking: cannot use unopened serial port %s.", serial->port); return -DEVICE_CONN_ERROR; } int ret; if (nonblocking) { ret = sp_nonblocking_read(serial->data, buf, count); } else { // TODO read or read_next? Bailing early is probably better than waiting. ret = sp_blocking_read_next(serial->data, buf, count, timeout_ms); } char *error; switch (ret) { case SP_ERR_ARG: log_error("serial_read_nonblocking: invalid serial port parameters."); return -DEVICE_CONF_ERROR; case SP_ERR_FAIL: error = sp_last_error_message(); log_error("serial_read_nonblocking: read error (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return -DEVICE_CONN_ERROR; } return ret; }
/** * Close the specified serial port. * * @param serial Previously initialized serial port structure. * * @retval SR_OK Success. * @retval SR_ERR Failure. * * @private */ SR_PRIV int serial_close(struct sr_serial_dev_inst *serial) { int ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (!serial->data) { sr_dbg("Cannot close unopened serial port %s.", serial->port); return SR_ERR; } sr_spew("Closing serial port %s.", serial->port); ret = sp_close(serial->data); switch (ret) { case SP_ERR_ARG: sr_err("Attempt to close an invalid serial port."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Error closing port (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return SR_ERR; } sp_free_port(serial->data); serial->data = NULL; return SR_OK; }
int serial_open(struct serial_device_t *serial, int flags) { if (!serial) { log_error("serial_open: invalid serial port device."); return -DEVICE_CONN_ERROR; } log_info("serial_open: opening serial port '%s' (flags %d).", serial->port, flags); sp_get_port_by_name(serial->port, &serial->data); int ret = sp_open(serial->data, flags); char *error; switch (ret) { case SP_ERR_ARG: log_error("serial_open: invalid serial port parameters."); return -DEVICE_CONF_ERROR; case SP_ERR_FAIL: error = sp_last_error_message(); log_error("serial_open: error opening serial port (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return -DEVICE_CONN_ERROR; } return NO_ERROR; }
static int _serial_write(struct sr_serial_dev_inst *serial, const void *buf, size_t count, int nonblocking) { ssize_t ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } if (!serial->data) { sr_dbg("Cannot use unopened serial port %s.", serial->port); return SR_ERR; } if (nonblocking) ret = sp_nonblocking_write(serial->data, buf, count); else ret = sp_blocking_write(serial->data, buf, count, 0); switch (ret) { case SP_ERR_ARG: sr_err("Attempted serial port write with invalid arguments."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Write error (%d): %s.", sp_last_error_code(), error); sp_free_error_message(error); return SR_ERR; } sr_spew("Wrote %d/%d bytes.", ret, count); return ret; }
/** * Open the specified serial port. * * @param serial Previously initialized serial port structure. * @param flags Flags to use when opening the serial port. Possible flags * include SERIAL_RDWR, SERIAL_RDONLY, SERIAL_NONBLOCK. * * If the serial structure contains a serialcomm string, it will be * passed to serial_set_paramstr() after the port is opened. * * @return SR_OK on success, SR_ERR on failure. */ SR_PRIV int serial_open(struct sr_serial_dev_inst *serial, int flags) { int ret; char *error; if (!serial) { sr_dbg("Invalid serial port."); return SR_ERR; } sr_spew("Opening serial port '%s' (flags %d).", serial->port, flags); sp_get_port_by_name(serial->port, &serial->data); ret = sp_open(serial->data, flags); switch (ret) { case SP_ERR_ARG: sr_err("Attempt to open serial port with invalid parameters."); return SR_ERR_ARG; case SP_ERR_FAIL: error = sp_last_error_message(); sr_err("Error opening port: %s.", error); sp_free_error_message(error); return SR_ERR; } #ifndef _WIN32 serial->fd = serial->data->fd; #endif if (serial->serialcomm) return serial_set_paramstr(serial, serial->serialcomm); else return SR_OK; }