How to print float value with sprintf in TrueStudio and H7?

Check what libraries you're linking.

I honestly don't understand why this is the default, and not obvious how to turn off. Generates a constant stream of queries. @Markus GIRDLAND​ 

On a part with 512KB+ Flash and an FPU surely there's space for a properly functioning library?

when you select the nano library, select the nano with floating point support in Sprintf

@Community member​  What you mean for "when you select the nano library"?

Thanks

In the meanwhile....

int HELPER_Float_To_Char(char *str, double f, char precision)

{

long a,b,c,k,l=0,m,i=0;

// check for negative float

if(f<0.0)

{

str[i++]='-';

f*=-1;

}

a=f; // extracting whole number

f-=a; // extracting decimal part

k = precision;

// number of digits in whole number

while(k>-1)

{

l = pow(10,k);

m = a/l;

if(m>0)

{

break;

}

k--;

}

// number of digits in whole number are k+1

/*

extracting most significant digit i.e. right most digit , and concatenating to string

obtained as quotient by dividing number by 10^k where k = (number of digit -1)

*/

for(l=k+1;l>0;l--)

{

b = pow(10,l-1);

c = a/b;

str[i++]=c+48;

a%=b;

}

str[i++] = '.';

/* extracting decimal digits till precision */

for(l=0;l<precision;l++)

{

f*=10.0;

b = f;

str[i++]=b+48;

f-=b;

}

str[i]='\0';

return strlen(str);

}

self :face_with_tears_of_joy:

Still needs some changes, but it done the minimum.

​I've been using this: https://github.com/mpaland/printf for my printf needs.