How to access Statistics Counters in TSE

Hi,

I am using triple speed Ethernet MAC. When I read statistics counters, such as aFramesTransmittedOK, etherStatsPkts, etc. But they all read zeros.

I know there are definitely good packets are transmitted, and some packets are received.

In the struct np_tse_mac, the command status register, frame length registers, etc. they are all read correctly.

Can any one tell me, why these statistics counters are always zero?

Thank you,

David