QNX RTOS v4 Knowledge Base
QNX RTOS v4 Knowledge Base
| Title |
Serial port questions |
| Ref. No. |
QNX.000001200 |
| Category(ies) |
Development, Character I/O |
| Issue |
How do we handle serial port control lines? We want to handle (read or write) directly (in code) the DSR/DTR/RTS/CTS/DCD signals to interact with a modem.
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| Solution |
You can use the qnx_ioctl() to toggle the serial port. qnx_ioctl() will issue special control requests to a device. There are more details concering the control requests in usr/include/sys/qioctl.h.
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