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did inverse tangent not support FXP

Hi,

 

  I tryed to use tangent inverse with FXP but it does not work, is anybody have idea about why this happen?

 

  Regards,

SASA

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Hi SASA;

 

it happens because trigonometric functions don't support FXP!?

Best regards,
GerdW

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
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HI GerdW,

 

  In did, 

 

  so the solution for me is to use double or SGL

 

  i prefere SGL but results are a litle bit different in the fractional side when using SGL and FXP.

 

 i expected the Ksin to be  

-299,055055

 

 

 (plz see the epicture).

 

 Regards,

SASA

 

 

 

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Hi SASA,

 

is there a specific reason to use SGL instead of DBL on the cRIO9068?

Best regards,
GerdW

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
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Hi GerdW,

 

  We need more precision in computing Ksin,   what do you think ?

 

  Regards,

 

SASA

 

  

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Hi Sasa,

 

my opinion: use DBL for calculations on the RT host. Use FXP for FPGA calculations.

Best regards,
GerdW

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
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Hi GerdW,

 

   yes, but as you see we do all computing  Vis in RT side and FXP in not supported for trigonometric fuctions

 

  Did you have any idea about the NI9375 module, they say that it need external power supply but i did not found wher to connect it in the module?

 

  Best Regards,

 

SASA

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Hi SASA,

 

the manual for the NI9375 explains all in/out pins and the needed connections. It also contains schematics…

Best regards,
GerdW

using LV2011SP1 + LV2017 (+LV2020 sometimes) on Win10+cRIO
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Message 8 of 12
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SASA1 wrote:

   yes, but as you see we do all computing  Vis in RT side and FXP in not supported for trigonometric fuctions


Then use DBL, just like GerdW said to.


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here is the vi there is a difference and pictures, there are differences

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