devc-ser* options

Description:

All serial character drivers support the generic options described below.

Generic options

-b number

Set the baud rates. The supported baud rates depend on the board that the driver is running on. Default baud rate is 57600.

-E

Set options to “raw” (default). Software flow control is disabled by default.

When set in raw mode, the following terminal flags are initialized:

c_cflag = CREAD | CS8 | IHFLOW | OHFLOW | HUPCL;
c_iflag = IMAXBEL | INPCK;
c_lflag = 0;
c_oflag = ONLCR;

The order in which you specify the -E, and -S or -s options matters:

Options	Mode	Software flow control
-E	Raw	Disabled
-s -E	Raw	Disabled
-E -s	Raw	Enabled

-e

Start in “edited” mode (default raw). Software flow control is enabled by default.

When set in edited mode, the following terminal flags are initialized:

c_cflag = CREAD | CS8 | HUPCL;
c_iflag = IMAXBEL | INPCK | BRKINT | ICRNL | IXON | IXOFF;
c_lflag = ECHO | ECHOCTL | ECHOE | ECHOKE | ICANON | ISIG | IEXTEN;
c_oflag = ONLCR | OPOST;

The order in which you specify the -e, and -S or -s options matters:

Options	Mode	Software flow control
-e	Edited	Enabled
-S -e	Edited	Enabled
-e -S	Edited	Disabled

-F

Disable hardware flow control. The default depends on the mode: in raw mode (-E, the default), hardware flow control is enabled; in edited mode (-e), hardware flow control is enabled. Hardware flow control isn't supported in edited mode.

-f

Enable hardware flow control. The default depends on the mode: in raw mode (-E, the default), hardware flow control is enabled; in edited mode (-e), hardware flow control is enabled. Hardware flow control isn't supported in edited mode.

-C size

The size of the canonical buffer in bytes (default 256).

-I number

The size of the raw input buffer in bytes. The default is 2048.

-O number

(“Oh”) The size of the output buffer in bytes. The default is 2048.

-o opt[,opt...]

Additional options, separated by commas. The options include:

• devperm — Set permissions to the serial device.
• disable=rx — Disable the UART receiver on driver startup.
• highwater=prio — Set the receive highwater mark for input flow control. This specifies when to assert input flow control based on the byte level in ibuf.
• log=flow[@directory_path]—Specify whether to log data for receive, transmit, or both. If directory_path isn't specified, the default log directory is /dev/shmem. Specify one of these values for flow:
  • tx — transmit data only
  • rx — receive data only
  • all — both transmit and receive
• nodaemon — Don't call procmgr_daemon() to make the driver run in the background. Use this option if you need to know when the device terminates.
• priority=prio — Set the working priority of the internal pulse as a numeric value.
• smmu=0|1|off|on — (QNX Neutrino 7.0.4 or later) Specify whether or not support for the system memory management unit (IOMMU/SMMU) manager is required:
  • 0 or off — disable SMMU support. This is the default.
  • 1 or on — SMMU support is required; the driver exits if it isn't available

  For more information, see the SMMUMAN User's Guide.

-s

Enable software flow control. The default depends on the mode: in raw mode (-E, the default), it's disabled; in edited mode (-e), it's enabled.

-S

Disable software flow control. The default depends on the mode: in raw mode (-E, the default), it's disabled; in edited mode (-e), it's enabled.

-v[v]...

Be verbose; additional v characters cause more verbosity.