RTOS/TM4C1292NCPDT: Tiva Controller SW reset reason :- SYSCTL_CAUSE_SW

I suspect that this is a TI-RTOS induced reset caused by the serial RX buffer overflowing.

Ugra,

Are you using TI-RTOS? If so, what version?

Do you have a sample project that shows the issue?

Note: TI-RTOS would not induce a reset.

Todd

ToddMullanix,

Are you using TI-RTOS? If so, what version?

Sorry Am not using TI-RTOS, By mistaken it was tagged did not noticed.

Note: TI-RTOS would not induce a reset ( Yes True )

Am using Tivaware 2.1.0.12573

Best,

Ugra

Besides using TivaWare drivers, what software are you running? Is it just your application code? Are you using buffered UART from uartstdio.c? There is an older post that talks about a similar problem and it appears to be related to stack overflow: https://e2e.ti.com/support/microcontrollers/other/f/908/t/531446#pi320995=2

Note that you are using an old version of the TivaWare library. The latest version is 2.1.4.178.

Thanks for replay Bob,

 what software are you running?

What exactly your asking did not get
Embedded :- CCS 

Python :- IDLE 

Is it just your application code?

Yes it is 

Are you using buffered UART from uartstdio.c? 

Yes am 

Best,

Ugra

hi

it appears to be related to stack overflow:?

Can you suggest me if stack overflow occurs how to resolve it.

I am wondering if it is stack size or UART RX buffer size. The UART buffer sizes are defined in lines 49 and 52 of uartstdio.h

//*****************************************************************************
//
// If built for buffered operation, the following labels define the sizes of
// the transmit and receive buffers respectively.
//
//*****************************************************************************
#ifdef UART_BUFFERED
#ifndef UART_RX_BUFFER_SIZE
#define UART_RX_BUFFER_SIZE     128
#endif
#ifndef UART_TX_BUFFER_SIZE
#define UART_TX_BUFFER_SIZE     1024
#endif
#endif

To increase the stack size, you need to change it in two places. In the link command file, at the end of the file there is a line like this:

__STACK_TOP = __stack + 512;

And in the build settings under the "ARM Linker", "Basic Options".

In both cases my stack size was 512 bytes. Check your value and try increasing it.

Yes resolved thank you Bob