FPGA case structure

[SASA1]

hi,

  i'm developping a simple LV FPGA program on a compact rio using the 9401 module.

  i'm tryning to controle sequencely the DIO of the module by a flat sequence (sequence -> delay-> sequence->delay) , (see picture attached), i'm not sure it will work, 

  what i your opinion on this side?

  Regards,

SASA

[GerdW]

Hi SASA,

use a flat sequence instead of a stacked one. Until now we cannot see, what's happening in those other 2 frames…

- You only open the FPGA VI ref once, so closing it twice seems not right to me…

- As your while loop never stops you will never close your FPGA VI ref…

Hint: Did you notice this little "Auto Cleanup" button in the menu? Guess what it's for…

[P@Anand]

You have to configure the DIO direction (Input/Output) first before accessing the IOs. By default your DIOs will be in the Input mode and you have to Enable the Output before accessing it as DO.

[SASA1]

Hi GerdW,

  😉 i always used "auto cleanup" button, 

  at the begining  i tried the solution you described, but stacked sequence seems to me less consuming in the vi space 🙂

 but i will re-use it,

 olz see the picture attached,

Regards,

SASA

Hi SASA, use a flat sequence instead of a stacked one. Until now we cannot see, what's happening in those other 2 frames… - You only open the FPGA VI ref once, so closing it twice seems not right to me… - As your while loop never stops you will never close your FPGA VI ref… Hint: Did you notice this little "Auto Cleanup" button in the menu? Guess what it's for… Best regards, GerdW CLAD, using 2009SP1 + LV2011SP1 (sometimes even LV2014) on WinXP+Win7+cRIO Kudos are welcome

[GerdW]

Hi SASA,

between execution of the last and the first frame (when the loop spins) there is no delay. So right after setting/reading DIOs they will be read/set again.

I don't think that's what you want…

[SASA1]

Hi GerdW,

   didi you have seen the waiting "ben" of 200 ms, it's a waiting time, didi you think the opposit?

  Regards,

SASA

[GerdW]

Hi SASA,

yes I have seen the wait instruction between frame 0 and frame 2. But what's the wait time between frame 2 and frame 0?

When frame 2 is finished the loop iterates and frame 0 is executed instantly - resetting all DIOs so you will NOT notice any changes on the output pins…

[SASA1]

HI GerdW,

  so what solution you have in mind (delate the while loop)?

  Regards,

SASA

[GerdW]

Hi SASA,

you need a wait function after frame 2…

[SASA1]

Hi GerdW,

   I will come to you after testing the code.

  Thank you very much.

 SASA