MCUXpresso IDEのトピックRe: sprintf not functioning correctly

sprintf not functioning correctly

christopher_hes — Wed, 17 Jul 2019 16:48:08 GMT

I am working on a project in MCUXpresso that was originally written in code warrior. I am having difficulty using a sprintf() function and the problem seems to be with MCUXpresso. I have checked that I am using the original compiler and I am using the Redlib semihost C library. Below is the code:

char tString[50];

float current = 1.2;

sprintf(tString, "%3.0f",current);

After stepping through this code, the first three entries of tString are 32 ' '. What could be causing this issue?

Re: sprintf not functioning correctly

BlackNight — Wed, 17 Jul 2019 18:47:21 GMT

Are you using RedLib (the default)?

If yes, see https://community.nxp.com/docs/DOC-342727

I hope this helps,

Erich

Re: sprintf not functioning correctly

christopher_hes — Wed, 17 Jul 2019 19:17:16 GMT

I am using RedLib, I followed the instructions in the article you have referenced and when I opened that window the only directive from the article was PRINTF_FLOAT_ENABLE=0. I modified the directives as seen below and this has still not solved the issue. Additionally, I have included a snip of the tString after sprintf is called.

Re: sprintf not functioning correctly

BlackNight — Thu, 18 Jul 2019 04:40:27 GMT

I see you still have that CR_INTEGER_PRINTF in the list of defines. Remove it.

I hope this helps,

Erich

Re: sprintf not functioning correctly

christopher_hes — Thu, 18 Jul 2019 13:13:56 GMT

This seems to have solved the issue, thank you. I additionally found that it works using the NewLibNano library and selecting enable printf float and enable scanf float in the Managed Linker Script.