TMS570LC4357: Can you help me to solve 4 questions mainly about the EMAC modules?

user5614888

Part Number: TMS570LC4357

During last few days,I have met 3 questions below:

1.can you help me to check the schematics?8267.SB_V1005.pdf

2.when I want to use the Ethernet module, I found that if I write valueto registers,I will read different value.For example:

MDIO_USERACCESS0 =
( 1 << 31 ) /*[31] Go*/
| ( 0 << 30 ) /*[30] Read*/
| ( 0 << 29 ) /*[29] Ack*/
| ( (RegAddr & 0x1F) << 21 ) /*[25-21] PHY register address*/
| ( (PhyAddr & 0x1F) << 16 ) /*[20-16] PHY address*/
| ( 0 << 0 ); /*[15-0] Data*/

(

#define MDIO_BASE (0xFCF78900UL)

#define MDIO_USERACCESS0 *( volatile uint32_t* )( MDIO_BASE + 0x80UL )

)

After writing to MDIO_USERACCESS0 ,I will read 0x0021FFFF or something like that,but obviously I didn't write 0x0021FFFF.

3.I can't read theregisters.

#define ECTRL_BASE (0xFCF78800UL)

#define ECTRL_SOFTRESET *( uint32_t* )( ECTRL_BASE + 0x04UL )

I can't find the register ECTRL_SOFTRESET or read the value of it.

4.I can't connet to DP83640

IsNormal = (MDIO_LINK & 2U) ? TRUE : FALSE;

(

#define MDIO_LINK *( volatile uint32_t* )( MDIO_BASE + 0x0CUL )

#define MDIO_BASE (0xFCF78900UL)

)

MDIO_LINK is always 0;

over 6 years ago

0 QJ Wang over 6 years ago

TI__Guru**** 197036 points

Hello,

1. If you need TI to review your schematics, please contact with local FAEs.
2. Your software must check the status of the GO bit in USERACCESS0 before initiating a new transaction, to ensure that the previous transaction has completed.

//check GO bit
while( MDIO_USERACCESS0 & 0x80000000 );

//read the data
value = MDIO_USERACCESS0;

3. Can you access SOFTRESET register using CCS register window? or are you able to write/read SOFTRESET in your code instead of using CCS expression?

#define ECTRL_SOFTRESET *( volatile uint32_t* )( ECTRL_BASE + 0x04 )
value = ECTRL_SOFTRESET;

4. MDIO Link is set if the PHY with the corresponding address has link and the PHY acknowledges the read transaction. The bit is reset if the PHY indicates it does not have link or fails to acknowledge the read transaction. Writes to the register have no effect.

Can you read the ID or revision number from the PHY?