SERIAL_LINE_CONTROL structure (ntddser.h)
The SERIAL_LINE_CONTROL structure describes the control settings for the serial line.
Syntax
typedef struct _SERIAL_LINE_CONTROL {
UCHAR StopBits;
UCHAR Parity;
UCHAR WordLength;
} SERIAL_LINE_CONTROL, *PSERIAL_LINE_CONTROL;
Members
StopBits
The number of stop bits used at the end of each character that is transmitted or received. This member is set to one of the following values.
| Value | Description |
|---|---|
| STOP_BIT_1 | One stop bit. |
| STOP_BITS_1_5 | One and a half stop bits. |
| STOP_BITS_2 | Two stop bits. Not valid if WordLength = 5. |
Parity
The type of parity checking used for each character that is transmitted or received. This member is set to one of the following values.
| Value | Description |
|---|---|
| NO_PARITY | No parity bit is used. |
| ODD_PARITY | Odd parity is used. The parity bit is 0 if the number of 1s in the character value is odd. Otherwise, the parity bit is 1. |
| EVEN_PARITY | Even parity is used. The parity bit is 0 if the number of 1s in the character value is even. Otherwise, the parity bit is 1. |
| MARK_PARITY | The parity bit is always set to 1. |
| SPACE_PARITY | The parity bit is always set to 0. |
WordLength
Data bits per character. This member indicates the number of data bits in each character value that is transmitted or received, and does not include parity bits or stop bits. WordLength values in the range 5 to 8 are typically supported.
Remarks
This structure is used by the IOCTL_SERIAL_GET_LINE_CONTROL and IOCTL_SERIAL_SET_LINE_CONTROL requests.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddser.h |