topic Re: How to use mathematicals functions and memory allocation ? in Classic/Legacy CodeWarrior

How to use mathematicals functions and memory allocation ?

GuyRoux — Wed, 27 Jan 2010 17:54:42 GMT

Hello,

I use CodeWarrior for DSC56800E v8.3 and CodeWarrior IDE version 5.9.0 Build 4713. I travel under Windows 32 bits.

I build my project with C language.

I would know to use the functions as cos, sin, tan, ... . I already try librairies "math.h" and "cmath" but it's not good.

Moreover, I would do an allocation memory, I try to use the function "malloc". Somebody say me that existed a function to remplace "malloc".

Best regards,

Guy Roux

Re: How to use mathematicals functions and memory allocation ?

J2MEJediMaster — Wed, 27 Jan 2010 21:40:19 GMT

For trigonometric functions, you also need to link in the library with these functions. The default library is a stripped down version that lacxks these functions in order to reduce the program's memory footprint. Check out the Targeting ColdFire manual for information on which libraries to link into your program. The manual is located in the Help folder of the CodeWarrior installation folder.

---Tom

Re: How to use mathematicals functions and memory allocation ?

GuyRoux — Wed, 27 Jan 2010 21:56:10 GMT

Thank you for your response !

Why do you talk about ColdFire I work DSP 56f807

you said :

"The default library is a stripped down version that lacxks these functions in order to reduce the program's memory footprint"

I don't know what do you mean ? And what I am suppose to do to link the librairy

Best regards !

Re: How to use mathematicals functions and memory allocation ?

J2MEJediMaster — Thu, 28 Jan 2010 22:20:09 GMT

Sorry. I had ColdFire on the brain when I wrote that. For memory configuration information, you need to look at the 568000/E Targeting Manual. For the trigonometric functions, I do not see any sign of them in the two libraries mentioned in this manual, one which is a stripped down version (minimal I/O) and the complete version (complete I/O capabilities). I think you need to file a service request for that.

---Tom

Re: How to use mathematicals functions and memory allocation ?

giacomopetrini — Thu, 30 Sep 2010 21:20:21 GMT

Hi,

there should be a library with trigonometric among aother thing in the resources for DSP56xxx....

...fast check...

there: http://www.freescale.com/webapp/sps/site/prod_summary.jsp?code=FSLESL&fsrch=1

the name is FSLESL.

Hope this helps

Bye Jack