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Signals
Port signalling operations. More...
Functions | |
| enum sp_return | sp_get_signals (struct sp_port *port, enum sp_signal *signal_mask) |
| Gets the status of the control signals for the specified port. | |
| enum sp_return | sp_start_break (struct sp_port *port) |
| Put the port transmit line into the break state. | |
| enum sp_return | sp_end_break (struct sp_port *port) |
| Take the port transmit line out of the break state. | |
Detailed Description
Port signalling operations.
Function Documentation
| enum sp_return sp_end_break | ( | struct sp_port * | port ) |
Take the port transmit line out of the break state.
- Parameters:
-
[in] port Pointer to a port structure. Must not be NULL.
- Returns:
- SP_OK upon success, a negative error code otherwise.
- Since:
- 0.1.0
| enum sp_return sp_get_signals | ( | struct sp_port * | port, |
| enum sp_signal * | signal_mask | ||
| ) |
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.
- Parameters:
-
[in] port Pointer to a port structure. Must not be NULL. [out] signal_mask Pointer to a variable to receive the result. Must not be NULL.
- Returns:
- SP_OK upon success, a negative error code otherwise.
- Since:
- 0.1.0
| enum sp_return sp_start_break | ( | struct sp_port * | port ) |
Put the port transmit line into the break state.
- Parameters:
-
[in] port Pointer to a port structure. Must not be NULL.
- Returns:
- SP_OK upon success, a negative error code otherwise.
- Since:
- 0.1.0
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