topic Re: floating to fraction in CodeWarrior Development Tools

floating to fraction

ahnjoseph — Tue, 26 Jan 2016 06:44:32 GMT

MCU : s12zvl

CW: 10.6

I need to convert a floating point variable ram to fraction value for Using Fraction Lib

float f_t1;

tFrac16 test_frac1,test_frac2 ;

f_t1=0.5;

test_frac1 = FRAC16(0.5); // <--- O.K

test_frac1 = FRAC16(f_t1) ; // Compile Err

How can i do ?

Re: floating to fraction

ZhangJennie — Tue, 26 Jan 2016 08:02:11 GMT

Hi Ahn,

what error message do you have? can you please send a screenshot of it?

to solve the problem faster, can you please send your demo project here thus i can work on your issue directly. thanks!

Have a great day,
Jennie Zhang

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Re: floating to fraction

ahnjoseph — Tue, 26 Jan 2016 08:38:32 GMT

Thank you Fast service

Pls check attached Proj.

Thanks your kindly service

Best Regards

……………………………………

Joseph Ahn(안연수)

Assistant Software Design Manager

Avnet Electronic Marketing.

Joseph.ahn@avnet.com<mailto:Joseph.ahn@avnet.com>

……………………………………

12th Floor, KBS Media Center, Maebongsan-ro 45 (Sangam-dong),

Mapo-gu, Seoul, 121-915, Korea

Direct:

82-2-6277-6395

Fax:

82-2-761-2133

Re: floating to fraction

TICS_Fiona — Wed, 27 Jan 2016 04:28:46 GMT

Hello Ahn

Please choose the floating Point Library instead. Please open the Project Properties from ‘Project’ menu-> Properties. Then go to C/C++ Build-> Settings, under <Tool Settings> tab, go to S12Z Linker->Input, please replace :

"${MCUToolsBaseDir}/S12lisa_Support/s12lisac/lib_small/ansii.lib"

With:

"${MCUToolsBaseDir}/S12lisa_Support/s12lisac/lib_small/ansif.lib"

I also attached a simple example project for using FRAC16 macro.

Best Regards

Fiona Kuang

Technical Information & Commercial Support

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Note: If this post answers your question, please click the Correct Answer button. Thank you!

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Re: floating to fraction

ZhangJennie — Wed, 27 Jan 2016 05:43:55 GMT

Hi Ahn,

I built your project from my side, I got error message:

this is because symbols such as __fcmp are supported in floating library only. while this project use integer library ansii.lib which doesn't support symbols.

So Fiona is correct, change ansii.lib(c_no_float support library) to ansif.lib(c_float support library) can correct the problem.

for HCS12z library usage of, see below:

my modified project is attached.

can this help you?

Have a great day,
Jennie Zhang