pwm verilog code

Hello,

check this out !

http://www.ece301.com/fpga-projects/53-pwm.html

REMEMBER : google is your best friend :)

Hi,

I would like to know whether attached code is right to generate pwm wave.

please reply

Hi,

Your code will generate a wave that looks like a PWM !

To create a PWM you need a duty cycle (how often do you want to refresh your signal) : You need to know your board frequency and compute the duty of your PWM ...

The link I gave you explain that ! Follow the steps and stop jumping into coding something you don't understand

I recommend you read the page carefully

Hi,

I hope this idea is correct.

my fpga clock is 50mhz.that is period 20ns.

I designed a pwm with 1000ns period.

switch variable given as 2 to get 80 percent duty cycle.

please check.

Thankyou

1000 ns =>

P = 0.000001*50000000 = 50

SC (Steps Count) = 2^3 = 8

==> sd = P / SC = 50/8 =6.25

but you are using sd = 20 !

Please read carefully the page (link I posted) and follow the steps ! It's not that hard !

Hi,

what is mean by refreshing signal?? I didn't get. can't i take p=1000ns?

by refreshing signal we mean the time we need to have a new value (period)

Yes you can take whatever period you want ! For 1000 ns P = 50 (because you multiply the 20 ns by 50 to get 1000 ns)