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Altera_Forum's avatar
Altera_Forum
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13 years ago

vhdl for reading pwm

hi i'm using ultrasonic sensor to detect water level and implement on De2 board. The output of the sensor is in pulse width which is 147uS/inch. Can anyone guide me how i can write the vhdl code for ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

Hello

I work whith EPM570 and I need help if is possible.

I have 4 button 2 is for increase and decrease one counter "std_logic 14 bit, (That are the maximum frequency of my step motor) the other 2, is for start cw and ccw.

Now I need, when I push one off the cw/ccw button, to send out the step clock for step motor whith ramp, and when the frequency arrive equal to my counter, it stop to increase,

and it continous to run until i release the button.

When I release the button, the frequency decrease automatic until arrive to zero.

The program for direction is ok tested, but for the clock, for me is very difficolty, I have not a big experience whith VHDL

Can somebody help me??

Thanks in advance

Maurizio