TMS570LS3137: TMS570LS3137 code loaded using Flash F021 API stuck at CheckFlashECC()

Hello Kalyan,

This is a diagnostic to test the ECC logic. If an ECC is detected then the flag ERR_ZERO_FLG in the FEDACSTATUS register is expected to be set. If it is not set, then there is something wrong with the ECC logic.

CheckFlashECC() does check the single bit ECC error and 2-bit ECC error. When CPU detects an uncorrectable 1-bit ECC error or an uncorrectable 2-bit ECC error, it will signal the error event to the flash module. The flash module FEDACSTATUS register should be updated for bit 1 or bit 8. Do you see those bit getting set?

If you run the CheckFlashEcc() twice and the ECC error is forced at the same location (bit 0 of ECC in the example code), the CPU will not able to detect the ECC error, and run into the infinite loop:

if ((flashWREG->FEDACSTATUS & 0x2U) == 0U)
{
selftestFailNotification(CHECKFLASHECC_FAIL1);
}

Hi Wang,

Thanks for your response. I think i haven't conveyed the issue correctly.

We are flashing an image (Image generated by HALCOGEN) using F021 library functions. Below are the PASS and FAIL scenarios:

PASS Scenario:

After successful flashing of image if i power cycle there is no issue in execution of the code.

FAIL Scenario:

After successful flashing of image  if i reset just the controller code execution is stuck at CheckFlashECC() function.

NOTE: we are using "Fapi_issueProgrammingCommand" with "Fapi_AutoEccGeneration" as argument of FAPI function.

Can you please let  us know why this scenario might happen?

Thanks,

Kalyan

Hello Kalyan,

If you run CheckFlashECC() twice, the 2nd call will not capture the ECC error.

In PASS Scenario: doesn't the 2nd image call CheckFlashECC() before jumping to the 1st image?

Hi Wang,

Question: In PASS Scenario: doesn't the 2nd image call CheckFlashECC() before jumping to the 1st image?
Answer: 2nd image just has flash loading functionality and doesn't have CheckFlashECC() function call.

Thanks,
Kalyan

Hello Kalyan,

The sys_startup.c in 2nd image might call CheckFlashECC(), and 1st image may call CheckFlashECC() this function again in its sys_startup.c. 

In the PASS Scenario, what is the value in the ESM status registers before jumping to the 1st image? 

Hi Wang,

Question: In the PASS Scenario, what is the value in the ESM status registers before jumping to the 1st image?
Answer: PASS Scenario is after loading new image each time we have to power cycle to execute successfully.

Thanks,
Kalyan