DP83826AE: DP83826 LED0 blinks issue

Hi team, below is the test data from my customer, pls help on potential reasons.

Customers attempted to configure the MLEDCR Register (Offset = 0x25) [Reset Value = 0x0041] to 0x0001 

via the F28P650SK7 MDIO interface, aiming to set LED0 to work in the LINK OK state.

however, this operation failed.

Customer performed the following read tests: 

Step 1:

Read the BMSR Register (Offset = 0x01) [Reset Value = 0x7849]

PHYDateTest[0] = read_mii_reg(0x01, 0x01); 

The read value was 0x7849, which matches the default reset value. 

Step 2:

Read the MLEDCR Register (Offset = 0x25) [Reset Value = 0x0041]

PHYDateTest[0] = read_mii_reg(0x01, 0x25); 

The read value was 0xC1E1, which is inconsistent with the default reset value. 

Based on the above results, the read function customer used appears to work normally (as verified by Step 1),but the 0x25 register behaves abnormally.

The function implementation is as follows: 

Uint16 read_mii_reg(Uint16 phy_addr, Uint16 reg_addr)

{

    Uint16 ReadData;

    HW_EscWriteWord(0x0100,ESC_MII_ECAT_ACCESS_OFFSET);

    HW_EscWriteWord(((reg_addr<<8) | phy_addr),ESC_PHY_ADDRESS_OFFSET);

    HW_EscWriteWord(0x0100,ESC_MII_CTRL_STATUS_1_OFFSET);

    DELAY_US(30);

    HW_EscReadWord(ReadData, ESC_PHY_DATA_OFFSET);

    return ReadData;

}

#define HW_EscWriteWord(WordValue, Address)    ESC_writeWord(WordValue, Address)

Void ESC_writeWord(uint16_t wordValue, uint16_t address)

{

    DINT;

    ESC_writeWordISR(wordValue, address);

    EINT;

}
Thanks.

Joyce