Dividing FPGA labview

[Rayden]

Hi  for all,

my problem look easy but its not real.

 i want to introduce simple equation to my project which simply generate PWM signal with "PWM bridge pair" function. as this function need Ontime and Half_period  with format (I16) and (I32) i want to introduce simple function which convert frequency 32kHz to 625 ticks = Half_period(I32) since FPGA clock its 40MHz so i tried to introduce this equation

Hal_period (PWM pair bridge Block) = (40000 / F) / 2 in order to obtain F like input in kHz and not ticks as input.

 i found in forum many solutions like :

http://www.ni.com/example/29021/en/

or this one also

http://forums.ni.com/t5/LabVIEW/Dividing-in-FPGA/m-p/189324/highlight/true#M109575

 i download it  which in attached piece 2   but how to use it with my existing project.

i do like this my programme is attached in piece 1 with comments  but not fuction   :/.

thanks for all helps.

[Rayden]

No answer !!!!!!!!! Please i need help .

i'am blocked at this problem 😕

[samazing]

Rayden,

Could you clarify what exactly is not working for you? You say your program does not function but it is hard to identify what your problem actually is.

I did notice that in the code you posted, you have a single cycle timed loop warpped around your entire program. The single cycle timed looped is mean to contain a small amount of simple code. In your program, you have a lot going on inside your single cycle timed loop. I would recommend using a regular while loop instead.

[Rayden]

I want simply to divide 4000 by variable I32 . it means i want to convert ticks in frequency as FPGA clock is 40MHz 

F (KHz) = 4000 / Variable (tikcks) thats it. the problem is dividing when i use R and Q fraction or simply bloc  fraction /   is not function in labview with FPGA target.

[samazing]

Comparing your code to the provided example, it seems like you are missing a shift register in your while loop. Could this be the cause of your error?

Again, I would not recommend using a single cycle timed loop with a while loop inside of it. 

[Rayden]

not yet. 😕

the problem is how to inject while loop and FPGA Horloge loop.

there is no other solution without looping to avoid loop problem to do dividing of 2 variables in FPGA !?

[samazing]

You cannot divide or use loops inside a single cycle timed loop.

[Rayden]

Yes i confirm it.  So how can i do to divide 2 variables format U16 ?!!

Please i am blocked for 3 weeks 😕

[samazing]

You should be able to divide two U16s in a normal while loop. Just make sure to remove your single single timed loop. Division takes more than one cycle of a timed loop.

[Rayden]

i didn't understand can you give me some détails !

dividing in labview its different than dividing in labview FPGA  😕

please can you tell me what modification i must introduce to my program a sugestion look very usefull. thanks