Pass data, or error and control codes to
io-char
Synopsis:
#include <sys/io-char.h>
int tti( TTYDEV *dev,
unsigned c );
Arguments:
- dev
- A pointer to the structure that represents the specific device that data has
been received on.
- c
- Contains received data and control codes that modify how the data is read
and processed. One of:
-
- TTI_BREAK — The hardware detected a “break” signal or
received a VINTR character.
- TTI_CARRIER — Indicates to the
io-char library that a carrier was detected
(i.e., the hardware modem is online).
- TTI_FRAME — The hardware detected a framing
error.
- TTI_HANGUP — Indicates to io-char
that the hardware modem is “hung up.” This type is the opposite of
TTI_CARRIER.
- TTI_INTR — Internal to io-char.
Indicates a SIGINT character has been received.
- TTI_OHW_CONT — Used by hardware flow control to start
output.
- TTI_OHW_STOP — Used by hardware flow control to stop
output.
- TTI_OVERRUN — The hardware detected an overrun.
- TTI_PARITY — The hardware detected a parity
error.
- TTI_QUIT — Internal to io-char.
Indicates a VQUIT character has been received.
- TTI_SUSP — Internal to io-char.
Indicates a VSUSP character has been received.
Description:
The tti() function forwards data received by the hardware to
io-char, and passes error and control codes.
Returns:
If this call returns 0, do nothing. If it returns 1, an event
needs to be generated for io-char.
Classification:
QNX OS
| Safety: |
|
| Cancellation point |
No |
| Signal handler |
No |
| Thread |
Yes |
