topic Re: Error when building project with sprintf in LPCXpresso IDE

Error when building project with sprintf

flamehaze — Wed, 21 Dec 2016 11:59:03 GMT

Hello,

(Sorry if my english sucks, I hope you'll understand)

So i'm in internship and i'm working on a project. So I got a problem when I build the project. Everything is fine, I don't have any errors on the code but I got this at the end : make: ***[Test_UART_v1.axf] Error 1. So I know that the problem is from the sprintf because when I delete it, everything works.

I'll just put the part with the sprintf :

#include stdio.h

[...]

int voltage = ADC_Read(); //function created by myself

char volt_final[10];

sprintf(vol_final,"%d",voltage);

[...]

So I read some articles about the librairies and I'm new to LPCXpresso so maybe I need to do something ?

I tried itoa but it doesnt seems to work, I don't get a good result ,maybe I did something wrong with my ADC_Read().

Thank you for your help :smileyhappy:

Re: Error when building project with sprintf

lpcxpresso_supp — Wed, 21 Dec 2016 15:50:33 GMT

To use sprintf, you need to make sure that you are building against the "Nohost" or "Semihost" variants of the C library. For more information see:

What are none, nohost and semihost libraries?

Switching the selected C library

Linker error "Undefined reference to 'xxx' "

If you need more assistance, please post full details of the error message(s) that you get in the build log:

https://community.nxp.com/message/630853

Regards,

LPCXpresso Support

Re: Error when building project with sprintf

flamehaze — Wed, 21 Dec 2016 16:08:01 GMT

Perfect, thank you very much ! The 2 articles were usefull and I understand now :smileyhappy:.