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  Topic: using float64 and cos; sin; acos and asin
longtu

Replies: 21
Views: 30613

PostForum: General CCS C Discussion   Posted: Fri May 04, 2012 5:45 am   Subject: using float64 and cos; sin; acos and asin
I am using PIC18F26K22. Do you think my problem cause by PIC18F26K22?
  Topic: using float64 and cos; sin; acos and asin
longtu

Replies: 21
Views: 30613

PostForum: General CCS C Discussion   Posted: Fri May 04, 2012 3:21 am   Subject: using float64 and cos; sin; acos and asin
Dear Ttemah,

I have just test your code(using CCS V4.114). The result is WRONG.
http://i657.photobucket.com/albums/uu294/longtupic/Testcode.jpg
  Topic: using float64 and cos; sin; acos and asin
longtu

Replies: 21
Views: 30613

PostForum: General CCS C Discussion   Posted: Fri May 04, 2012 3:10 am   Subject: using float64 and cos; sin; acos and asin
Dear Ttemah,

Could you please test your code with distance less than 50m. Example:
- Point 1: (0.0002,0)
- Point 2: (0.0000,0)

I want to detect with between 10 - 50m only.

Thanks you adva ...
  Topic: using float64 and cos; sin; acos and asin
longtu

Replies: 21
Views: 30613

PostForum: General CCS C Discussion   Posted: Thu May 03, 2012 11:07 am   Subject: using float64 and cos; sin; acos and asin
Thanks for your all answer.

I think this problem cause by all trigonometrical functions will be answer approximations value. And limits of digit by float type in CCS.

Here is my solution for my ...
  Topic: using float64 and cos; sin; acos and asin
longtu

Replies: 21
Views: 30613

PostForum: General CCS C Discussion   Posted: Thu May 03, 2012 6:22 am   Subject: using float64 and cos; sin; acos and asin
Dear RF_Developer,

That is a big help. Thank you very much with your explaination. Now, I know that all trigonemtrical functions will be received the approximations result. BUT I need the the near ...
  Topic: using float64 and cos; sin; acos and asin
longtu

Replies: 21
Views: 30613

PostForum: General CCS C Discussion   Posted: Thu May 03, 2012 2:26 am   Subject: using float64 and cos; sin; acos and asin
Hi Jochen Kochner,

I have the same problem when to use sin(), cos(), acos()...in CCS. Did you have a solution for this?

Thanks for your answer quickly.
 
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