Re: ARM GNU Toolchain 13.2Rel1 newlib issue with sprintf and floating point

Ho Dave,
I use FreeRTOS.
I'm going to verify and I let you know

Thanks


Il ven 3 mag 2024, 19:45 Dave Nadler <[email protected]> ha scritto:

> Hi Ernesto- If you are not using FreeRTOS ignore this.
> If you are: Perhaps you have not got a correct sbrk setup.
> Many FreeRTOS demos from NXP and ST have this problem.
> See https://nadler.com/embedded/NXP_newlibAndFreeRTOS.html
> Hope that helps!
> Best Regards, Dave
>
> On 5/3/2024 1:04 PM, Ernesto Vigano' wrote:
>
> It's a copy-paste error.
> The syntax is the right one
>
> Il ven 3 mag 2024, 09:22 Christophe Lyon <[email protected]> ha
> scritto:
>
>> Hi,
>>
>> On 5/3/24 08:11, Ernesto Vigano' wrote:
>> > I need to use sprintf with floating point numbers (%f format specifier)
>> > in a project based on rpmsg_lite_str_echo_rtos on the cortex-M (NXP
>> > Processor).
>> > I use the recommended
>> > arm-gnu-toolchain-12.3.rel1-mingw-w64-i686-arm-none-eabi
>> > I see that when I call
>> >
>> > sprintf(str, "%d" 3);
>> >
>> > the number 3 is printed to the string str.
>> >
>> > But if I have a floating point number and I use "%f" format specifier
>> >
>> > sprintf(str, "%f" 3.5);
>>
>> Is this a copy/paste error, or did you forget the ',' before the number
>> you want to print?
>>
>> Thanks,
>> Christophe
>>
>> >
>> > I get
>> > ASSERT ERROR " Balloc succeeded ": file
>> >
>> "/data/jenkins/workspace/GNU-toolchain/arm-12/src/newlib-cygwin/newlib/libc/stdlib/mprec.c"
>> Line "783" function name ""
>> >
>> > It seems similar to this error
>> > forum.pjrc.com/index.php
>> > <
>> https://forum.pjrc.com/index.php?threads/strange-compiling-problem-assertion-balloc-succeeded-failed-file-data-jenkins-w.72798/
>> >
>> > that points to this fix
>> > github.com/.../f88aece242178ff0c187d56e34a79645fbc44a23
>> > <
>> https://github.com/zephyrproject-rtos/newlib-cygwin/commit/f88aece242178ff0c187d56e34a79645fbc44a23
>> >
>> >
>> > Is there a way to have sprintf working with floating point numbers?
>> >
>> > Thanks
>>
> --
> Dave Nadler, USA East Coast voice (978) 263-0097, [email protected], Skype
>  Dave.Nadler1
>
>