Mini2440 with DAC

Judau
Hello everyone!
I have a mini2440 board and it runs Win CE 6.0. Now, i have a problem with
DAC. I want to create a trapezoidal pulse with 2us edge. My DAC has 10 bit
resolution. Does anyone can help me how to do this?

Hope this not take much your time.
Best regards,
Judau