Procedure to perform RAM and FLASH self tests ECC on RM57 board

You have asked simple questions which require long answers. I will try to give you an overview and then you might want to follow up with more specific questions.

On the RM57L843 device ECC is always enabled for the Flash and the main RAM. Single bit errors can be corrected and operation can continue. Multi bit errors are uncorrectable and usually imply that the MCU operation cannot continue. Uncorrectable errors generate an event out of the Cortex R5 CPU. That event goes to the ESM (Error Signaling Module) which generates an NMI (non-maskable interrupt) and a toggle of the nERROR pin.

Single bit errors in the flash or RAM can be corrected and proper operation continues. To avoid the overhead of repeatedly correcting a hard single bit error the EPC (Error Profiling Controller) captures the address and the correct data in a content addressable memory (CAM). You can choose to generate an interrupt from the ESM when a single bit error is detected and corrected, or only when the CAM is full.

1. What is the test procedure to be followed to validate RAM and ROM

The safety manual, SPNU575, has many suggestions on testing the RAM and Flash contents, as well as checking the ECC logic which checks the contents on all reads and most writes. PBIST can be used as an initial flash test and CRC checks can be run periodically on critical Flash or RAM contents.

2. Is it EPC and ESM are mandatory to enable, to validate these components

As described above, the EPC and ESM are an integral part of the notification of errors in the flash or RAM.

3. Steps to enable the EPC and ESM

In the safety library file "HL_sys_startup.c" line calls esmInit() and line 477 calls epcInit(). esmInit() is defined in the file HL_esm.c. epcInit() is defined in the file HL_epc.c. All three files are generated by HALCoGen.

3. Does the tests need to run on only on boot mode, not in user mode

Some of the tests are run only at startup, others may be run periodically. Table 4 in appendix A of the safety Manual, SPNU575, identifies diagnostic features as continuous or periodic on demand.