How to setup TI's DSK in simulink model?

[EDIT: 20110605 01:23 CDT - reformat, clarify - WDR]

I have a TI's DSK(c5509A), do speech recognition experiments,

"DSP/BIOS Task" block is normally connected to the trigged subsystem block, so putting a buffer block inside a trigged subsystem block.

err message:

trigger block parameters: Trigger type:function-call Sample time type:triggered
buffer block parameters: Output buffer size (per channel):256 Buffer overlap:156
err "All sample times for 'untitled/Trigger Subsystem/Buffer' must be discrete. No continuous or constant sample times are allowed"

if

trigger block parameters: Trigger type:function-call Sample time type:periodic
buffer block parameters: Output buffer size (per channel):256 Buffer overlap:156

err "Port-based sample time block 'untitled/Trigger Subsystem/Buffer' has a sample time, 100,
 on output port 1 that does not align with the periodic sample time of function-call subsystem 'untitled/Trigger Subsystem'. 
Only constant (inf), inherited (-1), or periodic (1) sample times are allowed in the subsystem."

but I do not know how to do, Because buffer block is necessary,

Can I use "Taskblock connected to the Enabled subsystem" instead of "Taskblock+ triggered subsystem block",

anyone tell me or any idea

thanks

[Kaustubha Govind]

This question is similar to http://www.mathworks.com/matlabcentral/answers/8712-how-to-setup-buff-block-in-trigger-subsystem

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