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mcbsp as uart

hello

i am trying to use mcbsp2 on C5509A as a uart. i have done the following:

1.  write a user defined driver "called _uart", using the guide for ddk 1.2 for C55x

2. then i wrote a task, where i declare the uart handle, and open it. then i use the "uart writechar" command to write B and then C on the uart lines.

3. the mcbps is also set using the uart params option using dma4 and using dma5.

4. however finally on the "FXS" line of hte mcbsp2 i am unable to see any data come out.

can you please help me understand what am i doing wrong?