TMS320F280025C: Can't use sprintf for the error '64bit floating point operations are not allowed'

Hello Jim,

I'm guessing BUCK_vInSensed_Volts is a float64_t datatype? If not, are there any other 64-bit floating point numbers in your program? Have you tried doing the type-casting outside of the sprintf function call to determine whether the problem is the conversion or something with calling sprintf?

Best regards,

Omer Amir

Hi Omer,

Thanks for reply!

BUCK_vInSensed_Volts is float32_t. I try to delete float64_t datatype defination to find if there is someplace use it, but there is no error due to that.

Omer Amir said:

Have you tried doing the type-casting outside of the sprintf function call to determine whether the problem is the conversion or something with calling sprintf?

Yes, BUCK_vInSensed_Volts  itself is float32_t, so i think when calling sprintf and using float32_t, there is some operations transform float32_t to float64_t in sprintf.

Pls help to check how to use sprintf in F280025C, Thanks!

BR

Jim

Hello Jim,

Are you using any libraries for this project? If so, can you verify that they are built with the FPU32 configuration in the Project Properties > Build > C2000 Compiler > Processor Options?

Also, can you show what that sprintf function is calling? When I enter it in my code and include the stdio.h header file and the below sample code I have no errors building.

char *temp = "Test";
float32_t val = 5.06f;
sprintf(temp, "%3.0f", (float32_t)val);

Best regards,

Omer Amir

Hi Omer,

Thanks a lot!

I find there is a setting in Project Properties result in that error.

I used '32' in that setting, and when i change to 'all', there is no errors.

Can I use 'all' in that setting?

BR

Jim