reset MAX II

Hello, sorry for question and for my bad english, i am a student, and I am doing a card whith EPM570, for drive a small

step motor, I have to generated one pulse an direction, I have already done a part of program in VHDL, where

I put in 2 location the maximum speed and the mimimum speed, and now, whith 2 buttons up and down, i

whant start my frequency which low speed and increase until arrive at maximum frequency, whith ramp on when

i push button, and decrease whith ramp when I release the button, example,

I start whith one duty cicle off 50 ms, for low speed, and in about 1 second to arrive to reduce the duty cycle until,

the value off max frequency is equal to value in the location already done, and decrease when the button are released,

I have used many system but do not work, can somebody send suggestion how I can do??

Thanks in advance

regards

Maurizio