FEE Diagnostic Mode

ron chow

i write data in FEMU_xxxx registers (ECC Data Correction Mode 1)

FEMUADDR=0xF0200004u
flashWREG->FEMUDMSW =0U;// most significant data ,64 bit
flashWREG->FEMUDLSW = 0U;// least significant data ,64 bit

ecc = flashWREG->FEMUECC;

flashWREG->FEMUDLSW = FEE_TEST_DATA ^ BIT(FEE_ERROR_POS);// cause one or two bit error

the i enable diagnostic mode

flashWREG->FEMUECC = ecc;

and trig the diag, i found flashWREG->FEMUDLSW data is corrected ,but no error register is flaged???why？？

over 11 years ago

0 Charles Tsai over 11 years ago

TI__Guru**** 190836 points

Hello Ron,

Which status register did you check? You are doing a diagnostic on an FEE address. Your test address is 0xF020_0004 and this is a FEE address. So you should be checking the status register EE_STATUS at address 0xFFF8_731C. Do you see the flag get set in this register?

0 ron chow over 11 years ago in reply to Charles Tsai

Prodigy 240 points

thank u for ur attention! F021F_EE_STATUS_D_CORR_ERR_FLG or F021F_EE_STATUS_ERR_ONE_FLG or EE_STATUS is not indicated in one bit error ,while error is indicated.

0 Charles Tsai over 11 years ago in reply to ron chow

TI__Guru**** 190836 points

Hello Ron,

Are you saying the entire EE_STATUS register is zero? Since this is a diagostic test, bit 12 or bit 3 shouild set for either uncorrectable error or correctable error respectively. Also did you first enable EE_EOFEN and EE_EZFEN bits in the EE_CTRL1 register?

0 ron chow over 11 years ago in reply to Charles Tsai

Prodigy 240 points

you are genius！！

0 Charles Tsai over 11 years ago in reply to ron chow

TI__Guru**** 190836 points

Hello Ron, Glad that you resolved the problem. Let me know if you have further questions.

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FEE Diagnostic Mode