TI RTOS crash when calling GrStringDraw with a char[]

Grant Dare

Other Parts Discussed in Thread: EK-TM4C1294XL, TM4C1294NCPDT

Hi, I am trying to draw sensor data to my screen. If I just call

GrStringDraw(&sContext, "Test : 0.0", -1, 10, 30, 0);

it will work no problem. However trying to call

char buf[64];
    float i = 2.232;
    sprintf(buf, "Test: %f", i);//
    GrContextFontSet(&sContext, &g_sFontCm14);
    GrStringDraw(&sContext, buf, -1, 10, 30, 0);

I get the error

FSR = 0x0004
HFSR = 0x40000000
DFSR = 0x0000000b
MMAR = 0xe000ed34
BFAR = 0xe000ed38
AFSR = 0x00000000
Terminating execution...

Does anyone know why I would be getting this issue? I can't solve it as I have attempted similar tasks before without error.

EDIT: I have now found that if I use sprintf with a integer it's no problem, however, a float will still crash

over 5 years ago

0 Keith Barkley over 5 years ago

Guru 42095 points

Generally it is *sprintf()* that crashes due to its requiring a lot of stack and/or heap. Are you sure the sprintf() call is working?

Did you try just initializing buf (char buf = "Test: 123.4";) and see if that works?

0 ToddMullanix over 5 years ago

TI__Guru* 96960 points

Hi Grant,

What device are you using? What software (and version) are you using?

Todd

0 Grant Dare over 5 years ago in reply to Keith Barkley

Prodigy 30 points

Hi Keith Barkley,

I have tried initialising the buffer like that and it worked. It is clear that it's the sprintf that's causing it but personally, I don't believe I have used another method before. the sprintf call is working, I add a break point after the call and the char array is filled with the data I need.

0 Grant Dare over 5 years ago in reply to ToddMullanix

Prodigy 30 points

Hi @Todd, I am using the EK-TM4C1294XL evaluation kit which has the TM4C1294NCPDT micro controller.

0 ToddMullanix over 5 years ago in reply to Grant Dare

TI__Guru* 96960 points

Grant,

Are you using TI-RTOS? If so, this might be helpful: https://training.ti.com/debugging-common-application-issues-ti-rtos

Todd

0 Keith Barkley over 5 years ago in reply to Grant Dare

Guru 42095 points

Is it properly 0 terminated?

(Are you using snprintf() with too small a buffer?)

As a lark, try adding a '\0' at the end of your string.

Generally with sprintf() issues it is due to too small a stack or heap.

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TI RTOS crash when calling GrStringDraw with a char[]