TMS570LC4357: Flash, Parity Override Register, how to set a port to idle State

Hello,

You are right, the FPAR_OVR_KEY and the PAR_OVR_SEL is cleared automatically after performing the test.

1) write PAR_OVR_SEL (FPAR_OVR[17:16]) appropriately -- 0 for idle state parity checker
2) Write DIAG_BUF_SEL=0 for PORTA, or DIAG_BUF_SEL=4 for PORTB (FDIACTRL[10:8])
3) Write to PAR_OVR_KEY (FPAR_OVR[11:9]) to enable the flip
4) After performing this for one access, the FPAR_OVR_KEY and the PAR_OVR_SEL is cleared automatically.

/* Idle state parity checker received inverted parity polarity. */
flashWREG->FPAR_OVR = 0x00010000U;

/* Enable diagnostic mode and select diag mode 7 */
/* DIAG_BUF_SEL [10:8] [10:8] = 0 : Port A selected to flip data/ECC */
/* DIAG_BUF_SEL = 4: Port B selected to flip data/ECC */
flashWREG->FDIAGCTRL = 0x00150007U;

/* enables the parity checking on the access */
flashWREG->FPAR_OVR |= 0x00005A00U;

/* disable diagnostic mode */
flashWREG->FDIAGCTRL = 0x000A0007U;

The Parity Error in idle state for port A is set (MCMD_PAR_ERR in FEDAC_PASTATUS register, and L2FMC - parity error is set as well (channel 17 of ESM group 2)

I followed these steps yet when I write in the FPAR_OVR register to enable the parity checking on the access, the register is cleared automatically as expected yet MCMD_PAR_ERR in FEDAC_PASTATUS register is not set .

Sorry for replying so late, yes it does work I just to adjust the code in order that very little instruction occurs between the test trig and the parity overide.

Thanks,
Regards