SRAM ECC Check problems

[MMali.10]

I am having trouble with SRAM ECC check on an H7 MCU.

When i enable the registries the system trigger contiuouslly the ISR for a detected error and the status flags/registries are empty.

Also initializing the SRAM at startup dosen't solve the problem.

This is the piece of code that enable the check:

NVIC_DisableIRQ(ECC_IRQn);
RAMECC1->IER &= ~(RAMECC_IER_GIE | RAMECC_IER_GECCSEIE | RAMECC_IER_GECCDEIE | RAMECC_IER_GECCDEBWIE);
RAMECC1_Monitor1->CR &= ~(RAMECC_CR_ECCSEIE | RAMECC_CR_ECCDEIE | RAMECC_CR_ECCDEBWIE);
RAMECC1_Monitor1->SR &= ~(RAMECC_SR_SEDCF | RAMECC_SR_DEDF | RAMECC_SR_DEBWDF);
	
RAMECC1_Monitor1->CR |= RAMECC_CR_ECCDEBWIE | RAMECC_CR_ECCDEIE;
// RAMECC interrupt enable register (RAMECC_IER) on UNIT1 (D1 Domain)
RAMECC1->IER |= RAMECC_IER_GECCDEBWIE | RAMECC_IER_GECCDEIE;
// Enable Int
NVIC_SetPriority(ECC_IRQn, NVIC_EncodePriority(NVIC_GetPriorityGrouping(), 5, 0));
NVIC_EnableIRQ(ECC_IRQn);
RAMECC1->IER |= RAMECC_IER_GIE;
RAMECC1_Monitor1->CR |= RAMECC_CR_ECCELEN;

After this code the system start to call continuously the ISR.

I read the RM0399 manual, the AN5342 and also the HAL example in this community, none of them solved the issue.

May someone help me?

Good work

[FBL]

Hello @MMali.10,

Could you please provide more details about the issue? Is it before during initialization? a screenshot of RAMECC registers would be of great help.

[KevinG]

Did you get anywhere with this? I am seeing that if bits 0, 1 or 2 in RAMECC_IER are set (as the documentation suggests that they should be) then no values are returned in RAMECC_MxFAR, RAMECC_MxFDRL, RAMECC_x1FDRH or RAMECC_MxFECR.

Working:

0x52009000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0000002C 00000001 ................................,.......
0x52009028 00007488 516434BB 7EFC8B96 00000035 00000000 00000000 00000000 00000003 00000000 00000000 .t..»4dQ..ü~5...........................

Not working:

0x52009000 0000000F 00000000 00000000 00000000 00000000 00000000 00000000 00000000 0000002C 00000000 ................................,.......
0x52009028 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000003 00000000 00000000 ........................................