CCS/TMS320F280049: How to generate LIN wakeup signal using TMS320F280049？

Tool/software: Code Composer Studio

Hi everyone：

     I am doing a project ，we need use LIN communication with TMS320F280049. And if my produce is mian node in a LIN bus. I need send a wakeup signal to wake up other salve nodes. How can i set LIN_sendWakeupSignal(LINA_BASE); i mention that i need set the LIN_SCIGCR1_SWNRST bit. it means that  i should set function like follow list:

LIN_enterSoftwareReset(LINA_BASE);
LIN_sendWakeupSignal(LINA_BASE);
LIN_exitSoftwareReset(LINA_BASE);

bur it doesn't work?

so my question is where and when i need set these functions?

best wish 

YJ