mirror of
git://sigrok.org/libserialport
synced 2023-08-10 21:13:24 +03:00
Add doxygen documentation.
This commit is contained in:
Martin Ling
parent
bf2cbd652f
commit
cd5f52812d
@ -43,3 +43,6 @@ ChangeLog:
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git --git-dir $(top_srcdir)/.git log > ChangeLog || touch ChangeLog
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dist-hook: ChangeLog
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doc: $(library_include_HEADERS) Doxyfile
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doxygen
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273
README
273
README
@ -58,275 +58,4 @@ Run "./autogen.sh" to generate the build system, "./configure" to setup, then
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API
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===
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The API is simple, and designed to be a minimal wrapper around the serial port
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support in each OS.
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Most functions take a pointer to a struct sp_port, which represents a serial
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port. These structures are always allocated and freed by the library, using the
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functions in the 'Enumeration' section below.
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All functions can return only three possible error values. SP_ERR_ARG indicates
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the function was called with invalid arguments. SP_ERR_FAIL indicates that the
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OS reported a failure. SP_ERR_MEM indicates that a memory allocation failed.
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All of these error values are negative.
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When SP_ERR_FAIL is returned, an error code or string description of the error
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can be obtained by calling sp_last_error_code() or sp_last_error_message(). The
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error code or message is that provided by the OS; libserialport does not define
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any error codes or messages of its own.
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Function calls that succeed return SP_OK, which is equal to zero, or where
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otherwise documented a positive value.
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The available functions are as follows:
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Enumeration
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-----------
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int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr);
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Obtains a pointer to a new sp_port structure representing the named port. The
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user should allocate a variable of type "struct sp_port *" and pass a pointer
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to this to receive the result.
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The result should be freed after use by calling sp_free_port().
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Returns: SP_OK on success, SP_ERR_FAIL on failure, SP_ERR_MEM on allocation
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failure, or SP_ERR_ARG if an invalid pointer is passed. If any error
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is returned, the variable pointed to by port_ptr will be set to NULL.
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Otherwise, it will be set to point to the newly allocated port.
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void sp_free_port(struct sp_port *port);
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Frees a port structure obtained from sp_get_port_by_name().
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int sp_list_ports(struct sp_port ***list_ptr);
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Lists the serial ports available on the system. The result obtained is an
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array of pointers to sp_port structures, terminated by a NULL. The user should
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allocate a variable of type "struct sp_port **" and pass a pointer to this to
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receive the result.
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The result should be freed after use by calling sp_free_port_list(). If a port
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from the list is to be used after freeing the list, it must be copied first
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using sp_copy_port().
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Returns: SP_OK on success, SP_ERR_FAIL on failure, SP_ERR_MEM on allocation
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failure, or SP_ERR_ARG if an invalid pointer is passed. If any error
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is returned, the variable pointed to by list_ptr will be set to NULL.
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Otherwise, it will be set to point to the newly allocated array.
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int sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr);
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Makes a new copy of a sp_port structure. The user should allocate a variable
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of type "struct sp_port *" and pass a pointer to this to receive the result.
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The copy should be freed after use by calling sp_free_port().
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Returns: SP_OK on success, SP_ERR_MEM on allocation failure, or SP_ERR_ARG
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if an invalid port or pointer is passed. If any error is returned,
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the variable pointed to by copy_ptr will be set to NULL. Otherwise,
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it will be set to point to the newly allocated copy.
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void sp_free_port_list(struct sp_port **list);
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Frees a port list obtained from sp_list_ports(). This will also free all
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the sp_port structures referred to from the list; any that are to be retained
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must be copied first using sp_copy_port().
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Opening and closing ports
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-------------------------
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int sp_open(struct sp_port *port, int flags);
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Opens the specified serial port.
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Parameters:
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port: Pointer to port structure.
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flags: Flags to use when opening the serial port. Possible
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flags are: SP_MODE_RDWR, SP_MODE_RDONLY, and SP_MODE_NONBLOCK.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, SP_ERR_MEM on allocation
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failure, or SP_ERR_ARG if an invalid port is passed.
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int sp_close(struct sp_port *port);
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Closes the specified serial port.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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if an invalid port is passed.
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Setting port parameters
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-----------------------
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int sp_set_baudrate(struct sp_port *port, int baudrate)
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Sets the baud rate for the specified serial port.
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Parameters:
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port: Pointer to port structure.
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baud: Baud rate in bits per second.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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for invalid arguments.
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int sp_set_bits(struct sp_port *port, int bits)
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Sets the number of data bits for the specified serial port.
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Parameters:
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port: Pointer to port structure.
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bits: Number of data bits to use. Valid values are 5 to 8.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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for invalid arguments.
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int sp_set_parity(struct sp_port *port, int parity)
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Sets the parity for the specified serial port.
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Parameters:
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port: Pointer to port structure.
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parity: Parity setting to use.
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(SP_PARITY_NONE, SP_PARITY_EVEN or SP_PARITY_ODD)
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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for invalid arguments.
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int sp_set_stopbits(struct sp_port *port, int stopbits)
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Sets the number of stop bits for the specified port.
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Parameters:
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port: Pointer to port structure.
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stopbits: Number of stop bits to use (1 or 2).
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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for invalid arguments.
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int sp_set_flowcontrol(struct sp_port *port, int flowcontrol)
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Sets the flow control type for the specified serial port.
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This function is a wrapper that sets the RTS, CTS, DTR, DSR and
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XON/XOFF settings as necessary for the specified flow control
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type. For more fine-grained control of these settings, use their
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individual configuration functions or the sp_set_config() function.
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Parameters:
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port: Pointer to port structure.
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flowcontrol: Flow control setting to use. Valid settings are:
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SP_FLOWCONTROL_NONE: No flow control.
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SP_FLOWCONTROL_XONXOFF: Software flow control using XON/XOFF characters.
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SP_FLOWCONTROL_RTSCTS: Hardware flow control using RTS/CTS signals.
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SP_FLOWCONTROL_DTRDSR: Hardware flow control using DTR/DSR signals.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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for invalid arguments.
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int sp_set_config(struct sp_port *port, struct sp_port_config *config)
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Sets all parameters for the specified serial port.
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The user should populate a struct sp_port_config, then pass a pointer to it
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as the config parameter.
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The fields of sp_port_config are:
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int baudrate: Baud rate in bits per second.
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int bits: Number of data bits to use. Valid values are 5 to 8.
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int parity: Parity setting to use.
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(SP_PARITY_NONE, SP_PARITY_EVEN or SP_PARITY_ODD)
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int stopbits: Number of stop bits to use (1 or 2).
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int rts: RTS pin mode.
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(SP_RTS_ON, SP_RTS_OFF or SP_RTS_FLOW_CONTROL)
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int cts: CTS pin mode.
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(SP_CTS_IGNORE or SP_CTS_FLOW_CONTROL)
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int dtr: DTR pin mode.
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(SP_DTR_ON, SP_DTR_OFF or SP_DTR_FLOW_CONTROL)
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int dsr: DSR pin mode.
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(SP_DSR_IGNORE or SP_DSR_FLOW_CONTROL)
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int xon_xoff: XON/XOFF flow control mode.
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(SP_XONXOFF_DISABLED, SP_XONXOFF_IN,
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SP_XONXOFF_OUT or SP_XONXOFF_INOUT)
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To retain the current value of any setting, set the field to to a
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negative value.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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for invalid arguments.
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Reading, writing and flushing data
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----------------------------------
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int sp_read(struct sp_port *port, const void *buf, size_t count)
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Reads bytes from the specified serial port. Note that this function may
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return after reading less than the specified number of bytes; it is the
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user's responsibility to iterate as necessary in this case.
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Parameters:
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port: Pointer to port structure.
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buf: Buffer in which to store the bytes read.
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count: Maximum number of bytes to read.
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Returns: The number of bytes read, SP_ERR_FAIL on failure,
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or SP_ERR_ARG for invalid arguments.
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int sp_write(struct sp_port *port, const void *buf, size_t count)
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Write bytes to the specified serial port. Note that this function may
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return after writing less than the specified number of bytes; it is the
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user's responsibility to iterate as necessary in this case.
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Parameters:
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port: Pointer to port structure.
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buf: Buffer containing the bytes to write.
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count: Maximum number of bytes to write.
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Returns: The number of bytes written, SP_ERR_FAIL on failure,
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or SP_ERR_ARG for invalid arguments.
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int sp_flush(struct sp_port *port);
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Flushes serial port buffers.
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Returns: SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
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if an invalid port is passed.
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Error handling
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--------------
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int sp_last_error_code();
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Gets the error code for a failed operation.
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In order to obtain the correct result, this function should be called
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straight after the failure, before executing any other system operations.
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Returns: The system's numeric code for the error that caused the last
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operation to fail.
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char *sp_last_error_message();
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Gets the error message for failed operation.
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In order to obtain the correct result, this function should be called
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straight after the failure, before executing other system operations.
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Returns: The system's message for the error that caused the last
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operation to fail. This string may be allocated by the function,
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and should be freed after use by calling sp_free_error_message.
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void sp_free_error_message(char *message);
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Frees the error message returned by sp_last_error_message().
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Doxygen API documentation is included.
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@ -17,6 +17,53 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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\mainpage libserialport API
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Introduction
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============
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libserialport is a minimal library written in C that is intended to take care
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of the OS-specific details when writing software that uses serial ports.
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By writing your serial code to use libserialport, you enable it to work
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transparently on any platform supported by the library.
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The operations that are supported are:
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- Port enumeration (obtaining a list of serial ports on the system).
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- Opening and closing ports.
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- Setting port parameters (baud rate, parity, etc).
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- Reading, writing and flushing data.
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- Obtaining error information.
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libserialport is an open source project released under the LGPL3+ license.
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API
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===
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The API is simple, and designed to be a minimal wrapper around the serial port
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support in each OS.
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Most functions take a pointer to a struct sp_port, which represents a serial
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port. These structures are always allocated and freed by the library.
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All functions can return only three possible error values. SP_ERR_ARG indicates
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the function was called with invalid arguments. SP_ERR_FAIL indicates that the
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OS reported a failure. SP_ERR_MEM indicates that a memory allocation failed.
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All of these error values are negative.
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When SP_ERR_FAIL is returned, an error code or string description of the error
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can be obtained by calling sp_last_error_code() or sp_last_error_message(). The
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error code or message is that provided by the OS; libserialport does not define
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any error codes or messages of its own.
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Function calls that succeed return SP_OK, which is equal to zero, or where
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otherwise documented a positive value.
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*/
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#ifndef LIBSERIALPORT_H
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#define LIBSERIALPORT_H
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@ -40,140 +87,427 @@ extern "C" {
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#define SP_LIB_VERSION_AGE @SP_LIB_VERSION_AGE@
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#define SP_LIB_VERSION_STRING "@SP_LIB_VERSION@"
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/* A serial port. */
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/** A serial port. */
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struct sp_port {
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/* Name used to open the port */
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/** Name used to open the port */
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char *name;
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/** \cond 0 */
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/* OS-specific port handle */
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#ifdef _WIN32
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HANDLE hdl;
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#else
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int fd;
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#endif
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/** \endcond */
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};
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/* Configuration for a serial port. */
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/** Configuration for a serial port. */
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struct sp_port_config {
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/** Baud rate in bits per second. */
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int baudrate;
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/** Number of data bits to use. Valid values are 5 to 8. */
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int bits;
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/** Parity setting to use. */
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int parity;
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/** Number of stop bits to use (1 or 2). */
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int stopbits;
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/** RTS pin mode. */
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int rts;
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/** CTS pin mode. */
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int cts;
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/** DTR pin mode. */
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int dtr;
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/** DSR pin mode. */
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int dsr;
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/** XON/XOFF flow control mode. */
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int xon_xoff;
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};
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/* Return values. */
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/** Return values. */
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enum {
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/* Operation completed successfully. */
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/** Operation completed successfully. */
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SP_OK = 0,
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/* Invalid arguments were passed to the function. */
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/** Invalid arguments were passed to the function. */
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SP_ERR_ARG = -1,
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/* A system error occured while executing the operation. */
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/** A system error occured while executing the operation. */
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SP_ERR_FAIL = -2,
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/* A memory allocation failed while executing the operation. */
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/** A memory allocation failed while executing the operation. */
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SP_ERR_MEM = -3,
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};
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/* Port access modes. */
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/** Port access modes. */
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enum {
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/* Open port for read/write access. */
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/** Open port for read/write access. */
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SP_MODE_RDWR = 1,
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/* Open port for read access only. */
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/** Open port for read access only. */
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SP_MODE_RDONLY = 2,
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/* Open port in non-blocking mode. */
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/** Open port in non-blocking mode. */
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SP_MODE_NONBLOCK = 4,
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};
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/* Parity settings. */
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/** Parity settings. */
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enum {
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/* No parity. */
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/** No parity. */
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SP_PARITY_NONE = 0,
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/* Even parity. */
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/** Even parity. */
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SP_PARITY_EVEN = 1,
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/* Odd parity. */
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/** Odd parity. */
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SP_PARITY_ODD = 2,
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};
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/* RTS pin behaviour. */
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/** RTS pin behaviour. */
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enum {
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/** RTS off. */
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SP_RTS_OFF = 0,
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/** RTS on. */
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SP_RTS_ON = 1,
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/** RTS used for flow control. */
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SP_RTS_FLOW_CONTROL = 2
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};
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/* CTS pin behaviour. */
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/** CTS pin behaviour. */
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enum {
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/** CTS ignored. */
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SP_CTS_IGNORE = 0,
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/** CTS used for flow control. */
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SP_CTS_FLOW_CONTROL = 1
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};
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/* DTR pin behaviour. */
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/** DTR pin behaviour. */
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enum {
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/** DTR off. */
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SP_DTR_OFF = 0,
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/** DTR on. */
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SP_DTR_ON = 1,
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/** DTR used for flow control. */
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SP_DTR_FLOW_CONTROL = 2
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};
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/* DSR pin behaviour. */
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/** DSR pin behaviour. */
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enum {
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/** DSR ignored. */
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SP_DSR_IGNORE = 0,
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/** DSR used for flow control. */
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SP_DSR_FLOW_CONTROL = 1
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};
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/* XON/XOFF flow control behaviour. */
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/** XON/XOFF flow control behaviour. */
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enum {
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/** XON/XOFF disabled. */
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SP_XONXOFF_DISABLED = 0,
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/** XON/XOFF enabled for input only. */
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SP_XONXOFF_IN = 1,
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/** XON/XOFF enabled for output only. */
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SP_XONXOFF_OUT = 2,
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/** XON/XOFF enabled for input and output. */
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SP_XONXOFF_INOUT = 3
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};
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/* Standard flow control combinations. */
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/** Standard flow control combinations. */
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enum {
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/** No flow control. */
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SP_FLOWCONTROL_NONE = 0,
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/** Software flow control using XON/XOFF characters. */
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SP_FLOWCONTROL_XONXOFF = 1,
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/** Hardware flow control using RTS/CTS signals. */
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SP_FLOWCONTROL_RTSCTS = 2,
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/** Hardware flow control using DTR/DSR signals. */
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SP_FLOWCONTROL_DTRDSR = 3
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};
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/* Enumeration */
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/**
|
||||
Obtains a pointer to a new sp_port structure representing the named port. The
|
||||
user should allocate a variable of type "struct sp_port *" and pass a pointer
|
||||
to this to receive the result.
|
||||
|
||||
The result should be freed after use by calling sp_free_port().
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, SP_ERR_MEM on allocation
|
||||
failure, or SP_ERR_ARG if an invalid pointer is passed. If any error
|
||||
is returned, the variable pointed to by port_ptr will be set to NULL.
|
||||
Otherwise, it will be set to point to the newly allocated port.
|
||||
*/
|
||||
int sp_get_port_by_name(const char *portname, struct sp_port **port_ptr);
|
||||
|
||||
/**
|
||||
Frees a port structure obtained from sp_get_port_by_name() or sp_copy_port().
|
||||
*/
|
||||
void sp_free_port(struct sp_port *port);
|
||||
|
||||
/**
|
||||
Lists the serial ports available on the system. The result obtained is an
|
||||
array of pointers to sp_port structures, terminated by a NULL. The user should
|
||||
allocate a variable of type "struct sp_port **" and pass a pointer to this to
|
||||
receive the result.
|
||||
|
||||
The result should be freed after use by calling sp_free_port_list(). If a port
|
||||
from the list is to be used after freeing the list, it must be copied first
|
||||
using sp_copy_port().
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, SP_ERR_MEM on allocation
|
||||
failure, or SP_ERR_ARG if an invalid pointer is passed. If any error
|
||||
is returned, the variable pointed to by list_ptr will be set to NULL.
|
||||
Otherwise, it will be set to point to the newly allocated array.
|
||||
*/
|
||||
int sp_list_ports(struct sp_port ***list_ptr);
|
||||
|
||||
/**
|
||||
Makes a new copy of a sp_port structure. The user should allocate a variable
|
||||
of type "struct sp_port *" and pass a pointer to this to receive the result.
|
||||
|
||||
The copy should be freed after use by calling sp_free_port().
|
||||
|
||||
@return SP_OK on success, SP_ERR_MEM on allocation failure, or SP_ERR_ARG
|
||||
if an invalid port or pointer is passed. If any error is returned,
|
||||
the variable pointed to by copy_ptr will be set to NULL. Otherwise,
|
||||
it will be set to point to the newly allocated copy.
|
||||
*/
|
||||
int sp_copy_port(const struct sp_port *port, struct sp_port **copy_ptr);
|
||||
|
||||
/**
|
||||
Frees a port list obtained from sp_list_ports(). This will also free all
|
||||
the sp_port structures referred to from the list; any that are to be retained
|
||||
must be copied first using sp_copy_port().
|
||||
*/
|
||||
void sp_free_port_list(struct sp_port **ports);
|
||||
|
||||
/* Opening & closing ports */
|
||||
/**
|
||||
Opens the specified serial port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param flags Flags to use when opening the serial port. Possible
|
||||
flags are: SP_MODE_RDWR, SP_MODE_RDONLY, and
|
||||
SP_MODE_NONBLOCK.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, SP_ERR_MEM on allocation
|
||||
failure, or SP_ERR_ARG if an invalid port is passed.
|
||||
*/
|
||||
int sp_open(struct sp_port *port, int flags);
|
||||
|
||||
/**
|
||||
Closes the specified serial port.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
if an invalid port is passed.
|
||||
*/
|
||||
int sp_close(struct sp_port *port);
|
||||
|
||||
/* Reading, writing and flushing. */
|
||||
/**
|
||||
Reads bytes from the specified serial port. Note that this function may
|
||||
return after reading less than the specified number of bytes; it is the
|
||||
user's responsibility to iterate as necessary in this case.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param buf Buffer in which to store the bytes read.
|
||||
@param count Maximum number of bytes to read.
|
||||
|
||||
@return The number of bytes read, SP_ERR_FAIL on failure,
|
||||
or SP_ERR_ARG for invalid arguments.
|
||||
*/
|
||||
int sp_read(struct sp_port *port, void *buf, size_t count);
|
||||
|
||||
/**
|
||||
Write bytes to the specified serial port. Note that this function may
|
||||
return after writing less than the specified number of bytes; it is the
|
||||
user's responsibility to iterate as necessary in this case.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param buf Buffer containing the bytes to write.
|
||||
@param count Maximum number of bytes to write.
|
||||
|
||||
@return The number of bytes written, SP_ERR_FAIL on failure,
|
||||
or SP_ERR_ARG for invalid arguments.
|
||||
*/
|
||||
int sp_write(struct sp_port *port, const void *buf, size_t count);
|
||||
|
||||
/**
|
||||
Flushes serial port buffers.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
if an invalid port is passed.
|
||||
*/
|
||||
int sp_flush(struct sp_port *port);
|
||||
|
||||
/* Basic port configuration */
|
||||
/**
|
||||
Gets current configuration of the specified serial port.
|
||||
|
||||
The user should allocate a struct sp_port_config, then pass a pointer to it
|
||||
as the config parameter. The struct will be populated with the port
|
||||
configuration.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_get_config(struct sp_port *port, struct sp_port_config *config);
|
||||
|
||||
/**
|
||||
Sets all parameters for the specified serial port.
|
||||
|
||||
The user should populate a struct sp_port_config, then pass a pointer to it
|
||||
as the config parameter.
|
||||
|
||||
To retain the current value of any setting, set the field to to a
|
||||
negative value.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_config(struct sp_port *port, const struct sp_port_config *config);
|
||||
|
||||
/**
|
||||
Sets the baud rate for the specified serial port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param baud Baud rate in bits per second.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_baudrate(struct sp_port *port, int baudrate);
|
||||
|
||||
/**
|
||||
Sets the number of data bits for the specified serial port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param bits Number of data bits to use. Valid values are 5 to 8.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_bits(struct sp_port *port, int bits);
|
||||
|
||||
/**
|
||||
Sets the parity for the specified serial port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param parity Parity setting to use.
|
||||
(SP_PARITY_NONE, SP_PARITY_EVEN or SP_PARITY_ODD)
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_parity(struct sp_port *port, int parity);
|
||||
|
||||
/**
|
||||
Sets the number of stop bits for the specified port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param stopbits Number of stop bits to use (1 or 2).
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_stopbits(struct sp_port *port, int stopbits);
|
||||
|
||||
/**
|
||||
Sets the flow control type for the specified serial port.
|
||||
|
||||
This function is a wrapper that sets the RTS, CTS, DTR, DSR and
|
||||
XON/XOFF settings as necessary for the specified flow control
|
||||
type. For more fine-grained control of these settings, use their
|
||||
individual configuration functions or the sp_set_config() function.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param flowcontrol Flow control setting to use. Valid settings are:
|
||||
|
||||
SP_FLOWCONTROL_NONE: No flow control.
|
||||
SP_FLOWCONTROL_XONXOFF: Software flow control using XON/XOFF characters.
|
||||
SP_FLOWCONTROL_RTSCTS: Hardware flow control using RTS/CTS signals.
|
||||
SP_FLOWCONTROL_DTRDSR: Hardware flow control using DTR/DSR signals.
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_flowcontrol(struct sp_port *port, int flowcontrol);
|
||||
|
||||
/* Advanced port configuration */
|
||||
/**
|
||||
Sets the RTS pin behaviour for the specified port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param rts RTS pin mode.
|
||||
(SP_RTS_ON, SP_RTS_OFF or SP_RTS_FLOW_CONTROL)
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_rts(struct sp_port *port, int rts);
|
||||
|
||||
/**
|
||||
Sets the CTS pin behaviour for the specified port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param cts CTS pin mode.
|
||||
(SP_CTS_IGNORE or SP_CTS_FLOW_CONTROL)
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_cts(struct sp_port *port, int cts);
|
||||
|
||||
/**
|
||||
Sets the DTR pin behaviour for the specified port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param dtr DTR pin mode.
|
||||
(SP_DTR_ON, SP_DTR_OFF or SP_DTR_FLOW_CONTROL)
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_dtr(struct sp_port *port, int dtr);
|
||||
|
||||
/**
|
||||
Sets the RTS pin behaviour for the specified port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param dsr DSR pin mode.
|
||||
(SP_DSR_IGNORE or SP_DSR_FLOW_CONTROL)
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_dsr(struct sp_port *port, int dsr);
|
||||
|
||||
/**
|
||||
Configures XON/XOFF flow control for the specified port.
|
||||
|
||||
@param port Pointer to port structure.
|
||||
@param xon_xoff XON/XOFF flow control mode.
|
||||
(SP_XONXOFF_DISABLED, SP_XONXOFF_IN,
|
||||
SP_XONXOFF_OUT or SP_XONXOFF_INOUT)
|
||||
|
||||
@return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
|
||||
for invalid arguments.
|
||||
*/
|
||||
int sp_set_xon_xoff(struct sp_port *port, int xon_xoff);
|
||||
|
||||
/* Error handling */
|
||||
/**
|
||||
Gets the error code for a failed operation.
|
||||
|
||||
In order to obtain the correct result, this function should be called
|
||||
straight after the failure, before executing any other system operations.
|
||||
|
||||
@return The system's numeric code for the error that caused the last
|
||||
operation to fail.
|
||||
*/
|
||||
int sp_last_error_code(void);
|
||||
|
||||
/**
|
||||
Gets the error message for a failed operation.
|
||||
|
||||
In order to obtain the correct result, this function should be called
|
||||
straight after the failure, before executing other system operations.
|
||||
|
||||
@return The system's message for the error that caused the last
|
||||
operation to fail. This string may be allocated by the function,
|
||||
and should be freed after use by calling sp_free_error_message.
|
||||
*/
|
||||
char *sp_last_error_message(void);
|
||||
|
||||
/**
|
||||
Frees an error message returned by sp_last_error_message().
|
||||
*/
|
||||
void sp_free_error_message(char *message);
|
||||
|
||||
#ifdef __cplusplus
|
||||
@ -181,3 +515,4 @@ void sp_free_error_message(char *message);
|
||||
#endif
|
||||
|
||||
#endif /* LIBSERIALPORT_H */
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user