SP_FLOWCONTROL_DTRDSR = 3,
};
+/** Input signals. */
+enum sp_signal {
+ /** Clear to send. */
+ SP_SIG_CTS = 1,
+ /** Data set ready. */
+ SP_SIG_DSR = 2,
+ /** Data carrier detect. */
+ SP_SIG_DCD = 4,
+ /** Ring indicator. */
+ SP_SIG_RI = 8,
+};
+
/** A serial port. */
struct sp_port {
/** Name used to open the port. */
/**
* Wait for buffered data to be transmitted.
*
+ * @param port Pointer to port structure.
+ *
* @return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
* if an invalid port is passed.
*/
* @{
*/
+/**
+ * Gets the status of the control signals for the specified port.
+ *
+ * The user should allocate a variable of type "enum sp_signal" and pass a
+ * pointer to this variable to receive the result. The result is a bitmask
+ * in which individual signals can be checked by bitwise OR with values of
+ * the sp_signal enum.
+ *
+ * @param port Pointer to port structure.
+ * @param signals Pointer to variable to receive result.
+ *
+ * @return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
+ * if an an invalid port or pointer is passed.
+ */
+enum sp_return sp_get_signals(struct sp_port *port, enum sp_signal *signals);
+
/**
* Put the port transmit line into the break state.
*
+ * @param port Pointer to port structure.
+ *
* @return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
* if an invalid port is passed.
*/
/**
* Take the port transmit line out of the break state.
*
+ * @param port Pointer to port structure.
+ *
* @return SP_OK on success, SP_ERR_FAIL on failure, or SP_ERR_ARG
* if an invalid port is passed.
*/