asynDriver: Asynchronous Driver Support - Release Notes

Febuary 14, 2005

Release 4-2


If read reads maxchars, it forced the last character to be 0 and returned asynOverflow if it wasn't. This is fixed.

drvAsynSerialPort,drvAsynIPPort - Error reporting

These did not properly set an error message in asynUser.errorMessage when they returned asynError. This is fixed.

drvAsynSerialPort - serial port options

Changes were made to the way serial port options are handled.

asynRecord - Serial Port Options

This has a new option to set Modem Control.

Release 4-1

The only code change was to fix the drvAsynIPPort and drvAsynSerialPort segmentation faults on cygwin-x86.

Release 4-0

Incompatible Changes.

APOLOGY: Many interfaces have changed since release 3-3. This is the reason this release is called 4-0.

New Features

Release 3-3

Incompatible Changes.

Major New Features


The following changes have been made


Removed the GOPT field. This is no longer necessary because the port options are automatically read whenever connecting to a port. "special" requests are now queued without changing the state of the record, using the new duplicateAsynUser, memMalloc(), and memFree() methods. This means that there is no longer a possibility of a special request being rejected because the record is busy. It is no longer possible to cancel a special request.




Flushes input only.


The EOS read method now calls the low-level read method only once and returns as many characters as the low-level method supplies. This makes the EOS read semantics match those of the low-level serial and IP drivers.


vxi11SetRpcTimeout - now handles fractions of a second properly


A new field has beem added, AQR (Abort Queue Request)

The semantics have been changed as follows: process is responsible for all and only for I/O operations. Only I/O operations cause the alarm status and severity to change. Special is responsible for all other operations performed by asynRecord.

Release 3-2

Changed and obsolete features

Major New Features

Release 3-1

Major New Features

Changed and obsolete features

Release 2-1

Major New Features

Changed and obsolete features

Release 1-2

Release 1-1

This release includes support for the following:

Modifications include:

  1. Added asynSetPortOption and asynGetPortOption to manipulate port options.
  2. Changed serial support to use asynSetPortOption/asynGetPortOption.
  3. Added devGPIB GPIBCVTIO commmand type to allow custom conversion routine to perform all I/O operations.
  4. Changed rules for return value from devGPIB custom conversion routines.
  5. Added dbior support.
  6. Changed devGPIB to no longer cache EOS.

Release 1-0alpha2

Support Provided in addition to asynDriver and asynGpib

Future Support


The vxi11 support has been tested on the following platforms: Solaris, Linux (redhat 9), Darwin, Windows XP (Cygwin), and vxWorks. It has been tested with the following vxi11 controllers:

The generic serial support has been tested with the following:

Two Device Support modules have been converted from the 3.13 gpib support: DG535 and TDS3014B Scope.