CCS/TM4C1294NCPDT: Fault ISR - Precise Data Bus Error - Tiva C Series

Sakthi sun pandy Thamilmani

Prodigy 20 points

Part Number: TM4C1294NCPDT

Tool/software: Code Composer Studio

Hello,

I am working in TM4C1294 launch pad, The program is running to FaultISR,

Following are the status found in debug mode

NVIC_FAULT_STAT_BFARV 1 Bus Fault Address Register Valid

NVIC_FAULT_STAT_PRECISE 1 Precise Data Bus Error

NVIC_FAULT_ADDR 0x432B546A Bus Fault Address [Memory Mapped]

I have referred for the memory mapping in the TM4C1294ncpdt data sheet.

The address in the register comes under Peripheral bit-band alias, what might be the issue that force the controller to fault ISR?

over 9 years ago

0 Sai Reddy over 9 years ago

TI__Mastermind 22640 points

Hello Sakthi,

One classic case is when the code tries to access a peripheral that has not been enabled in the System Control block. Please check your code and refer with similar TivaWare examples to see if all the correct initializing steps are followed before accessing a peripheral.

Also refer the following document to diagnose software faults: www.ti.com/.../spma043

Regards,
Sai

0 Sakthi sun pandy Thamilmani over 9 years ago in reply to Sai Reddy

Prodigy 20 points

Hello Sari,

I have solved the trouble, It was not due to accessing the peripheral that was not enabled. It was due to one of the array which was not properly initialized back to zero. It caused array over flow and it resulted in fault ISR.

0 bibin paul over 8 years ago in reply to Sai Reddy

Prodigy 10 points

Dear Sai,

Cant thank you enough. I searched everywhere for the fault and you were spot on.

Cheers,

Paul

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CCS/TM4C1294NCPDT: Fault ISR - Precise Data Bus Error - Tiva C Series