Re: Configuration of the RGA200 communication baud rate

[Eric Norum via Tech-talk <tech-talk at aps.anl.gov>]

What platform is this?  The error message implies that your system is not providing a definition for B28800.

Perhaps drvAsynSerialPort.c should be modified to use termios2 where it exists.

On Jan 11, 2026, at 9:29 PM, LONG FENG via Tech-talk <tech-talk at aps.anl.gov> wrote:

Hi all,

We encountered an issue while configuring the communication baud rate for the RGA200. As you know, the RGA uses a baud rate of 28,800, but EPICS does not seem to allow setting this baud rate. As a result, it reports the following error:  

drvAsynSerialPortConfigure ("RGA200", "/dev/ttyUSB0")
asynSetOption("RGA200", 0, "baud", "28800")
setOption failed Unsupported data rate (28800 baud)

How should this issue be resolved?

Feng  

— 

Eric Norum

eric at norum.ca