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DP83822H: Bit error counting

Hiroyasu Koike
Prodigy 30 points
Part Number: DP83822H


What I want to do is counting up total error frames (CRC, fragment, undersize, etc).
I thought the following registers have something to do with the implementation. 
  Table 8-101. 0x04A1 Receive Status Register (RXFS)   : bit6
  Table 8-34. 0x0015 Receive Error Count Register (RECR)

My DP83822 setting is like below.
  100base-tx
  rgmii

Could you give me advice? (if it's correct or not)

  • 0
    TI__Mastermind 22106 points

    Hi Koike-san,

    Unfortunately, DP838222 only has error counters for symbol errors (register 15h). For other errors, you will have to utilize MAC’s error counters.

    Best,

    J

  • 0 in reply to J
    Prodigy 30 points

    Hi J,

    Thank you for replying. Let me confirm.

    DP83822 cannot count up CRC errors.

    DP83822 can detect at least one bad CRC frame received by using 0x04A1:6 register.

    Am I correct?

  • +1 in reply to Hiroyasu Koike
    TI__Mastermind 22106 points

    Hi Koike-san, 

    DP83822 cannot count up CRC errors. 
    I just checked on the EVM if the bit you mentioned goes high. However, I do not see the bit going high when packets with CRC error is sent. 
    So, DP83822 cannot detect CRC errors coming in from the RJ45 side. 

    Best,
    J