Why cannot the Serial Baud rate value in Packet Input/Output blocks be set to anything greater than 256000 in Real-Time Windows Target 3.2 (R2008b) library?

I am using the Packet Input/Output blocks from the Real-Time Windows Target 3.2 (R2008b) library. I need to communicate with serial port from these blocks at a baud rate of 921600, however it appears that the blocks only allow a maximum rate of 256000. Can I use higher baud rates for these blocks? If yes, how?

Answer 1

[MathWorks Support Team]

This enhancement has been incorporated in Release 2010a (R2010a). For previous product releases, read below for any possible workarounds:

This limitation of setting the baud rate for the Packet Input/Output blocks exists only if you are using the GUI.

As a workaround, it is possible to change the baud rate to any desired value from the command line using SET_PARAM command. To do so, please use the following code:

% Click on the Packet input or output block in your model

get_param(gcb, 'DrvOptions')  % returns current options as [19200 8 0 0 0 0 0]

% baud rate is the first option in the answer from above command

% Change the baud rate and leave the rest intact

set_param(gcb, 'DrvOptions', '[921600 8 0 0 0 0 0]')