TMS320F280049C: ECC Flash Test NMI triggered

Jordan Cantillano

Part Number: TMS320F280049C

We are testing the ECC flash feature.

We are using the linker command file to insert the ECC in the flash

We disabled the ECC calculation in ECC_ENABLE register.

Then enter the initial data in FDATAL_TEST, FDATAH_TEST, FADDR_TEST, FECC_TEST registers.

After entered the data the ECC_TEST_EN bit was set in FECC_CTRL register.

The first part of the test check if there is an error.

When an uncorrectable error is triggered in the test (injecting a double bit error or address error). The NMI is triggered.

Then the NMI handler clears the NMI interrupt and the status of the ECC register.

The problem is when it finished running the NMI handler, return to the end of the test. Then the code breaks at address "0x3fb02a"

SW Toolset:
Code Composer Studio 10.0.0.00010
C2800 Compiler Tools 20.2.1 com.ti.cgt.c2000.19.win32.feature.group Texas Instruments

HW Toolset:
TMDSCNCD280049C Eval Board + TMDSHSECDOCK

0 Vamsi Gudivada over 5 years ago

Jordan,

That address refers to wait-boot. Device would have got reset due to NMI watchdog. Can you check RESC register to confirm the same?

Thanks and regards,

Vamsi

0 Jordan Cantillano over 5 years ago in reply to Vamsi Gudivada

Vamsi,

The problem was an illegal operation (ITRAP) due to the NMI handler was missing the __interrupt symbol in the function declaration.

Thanks for your help,

Jordan

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