CodeWarrior for MCUのトピックRe: Float compute error

Float compute error

alonjun — Thu, 28 Jul 2016 07:14:25 GMT

PC: Windows XP

IDE: CodeWarrior for S12x V5.1

Chip: S12XEP100

Code:

When run this code, VTST_BattOverCurrTh1_A not equal VTST_BattOverCurrTh2_A and get a wrong value

So I view assembly code,

When execute SEX A,X JSR _FUFLOAT, get a wrong value, it seems SEX A,X wrong, compiler's bug?

Original Attachment has been moved to: Project.zip

Re: Float compute error

ZhangJennie — Fri, 29 Jul 2016 08:57:15 GMT

Hi,

thanks for posting your questions.

can you please upload your entire demo project folder in zip format here. thus i can debug and check your problem directly. thanks!

Have a great day,
Jennie Zhang

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Re: Float compute error

alonjun — Fri, 29 Jul 2016 09:31:53 GMT

Have uploaded the project, thank you!

Re: Float compute error

ZhangJennie — Fri, 29 Jul 2016 10:07:44 GMT

I reproduced your problem. Will escalated it to development team.

for the moment please define HVSamples3_o2 as unsigned short as a workaround:

unsigned short HVSamples3_o2[8] = {0x0,0x0,0x10,0x0,0x10,0x0,0x0,0x0};

thus

both VTST_BattOverCurrTh1_A and VTST_BattOverCurrTh2_A will be 40.95996.

Have a great day,
Jennie Zhang

Re: Float compute error

alonjun — Mon, 01 Aug 2016 01:11:12 GMT

Thanks, it is not the best way to fix this problem, my code generated by Simulink, I can not control all the code. If it is the compiler's bug, hope can fix it fast. It is also exists in CodeWarrior for S12x V5.2, thank you!

Re: Float compute error

ZhangJennie — Fri, 05 Aug 2016 06:30:39 GMT

Hi Alon.

this problem has been reported to development team. I will let you know if I get any update.

Have a great day,
Jennie Zhang