sprintf causes runtime error

[Jorgie]

Hi, 

I am using sprintf to format data before sending it over a UART. 

STM Cube IDE 1.16.1

STM32F103 

The code works in one project but not in another. I have ticked "Use float with printf in MCU/MPU Settings"

int size = sprintf(&Buffer,"{\"src_addr\":\"%s\",\"PDOP\":%5.2lf,\"HDOP\":%5.2lf,\"VDOP\":%.2lf,\"Volts\":%.2f}\n",
"2", pdop, hdop, vdop,Volts);

for some reason the code end up in syscall.c

void _exit (int status)
{
 _kill(status, -1);
 while (1) {} /* Make sure we hang here */
}

 

[mƎALLEm]

Hello,

---

@Jorgie wrote:

The code works in one project but not in another. I have ticked "Use float with printf in MCU/MPU Settings"

 

 This occurs only when you print floats or whatever the type you print?

[Jorgie]

I have managed to format with a string I will try with an integer tomorrow.

However, as mentioned this same line of code works correctly in a different project.

 

[Jorgie]

I have rebuilt the project from scratch, must be something in the setup that caused an issue, perhaps I somehow put the buffer in an area that was not RAM.

Either way the code above does work correctly.