TMS570LS1114: the problem of Flash Diagnose

Hi Xiaohong,

For LS12x or LS11x, the diagnostic function can be execute out of flash, so you don't have to copy the code to SRAM.

zhang xiaohong said:

What is the possible cause of this phenomenon?

Which diag test did you performed?  FLASH_ECC_TEST_MODE_1BIT, or  FLASH_ECC_TEST_MODE_2BIT, or FLASH_ADDRESS_ECC_SELF_TEST, etc

These three types of diagnostics are called periodically, and I think it has little to do with the interface of these diagnostics, because the captured fault address is different from the self-check address

zhang xiaohong said:

 When the module is working for about 20 hours, there will be Flash 1 bit ECC error, and it is on different address, may I ask what is the possible cause?

I am not very clear about your question. Do you get 1-bit ECC error in normal flash operation? or you get 1-bit ECC error i your periodic flash self-test? 

For flash self-test, the 1-bit or 2-bit ECC error is injected intentionally to check the ECC logic and event signaling path to ESM.

I called the SL_SelfTest_Flash () interface，diagnosis types are as follows：FLASH_ECC_TEST_MODE_1BIT,  FLASH_ECC_TEST_MODE_2BIT,  FLASH_ADDRESS_ECC_ADDR_ECC，these Test is ok.

but  I get 1-bit ECC error in normal flash operation at different flash address.

It is strange. If you don't call SL_SelfTest_Flash(), will you get the ECC error at those flash addresses?

After flash ECC self-test, do you restore the flash registers (Diag control register, Parity override register, and Status registers), and ESM status registers to their original values?