[U-Boot-Users] Query Regarding Ethernet LoopBack Test for EP8260 Board

[Vikrant_Basotra]

Dear all,
We are customizing U-boot for the embedded planet ep8260 reference board.
I am working on customizing Ethernet in Uboot.
The ep8260 reference board has the LXT971 Fast Ethernet chip.
After customizing the code for Ethernet i tried doing an external Loop back
test.
Changes i made in the function
u-boot-1.1.1/cpu/mpc8260/ether_fcc.c/eth_loopback_test(void)->

1.I changed the FCC to FCC3:
  #define FCC_START_LOOP 2
  #define FCC_END_LOOP 2
  
2.I added a few extra printf for debugging purpose.

After connecting my board to the HyperTerminal and giving the command "elbt"
 i see the following messages:
****************************************************************************
***                         
Net:   FCC3 ETHERNET                    
BEDBUG:ready            
=> elbt       
FCC Ethernet External loop back test                                   
Initialize FCC channels: 2inside transmit: values are aa         inside
transmit

: Value are bb   inside transmit: value are cc   inside transmit: value are
dd

done    
Starting test... (Ctrl-C to Finish)                                   
ecp->state=Runningecp->state=closingHELLO EVERYONE..Just before Closed
Inside Clo

sedTest Finished in 2364ms (plus 1000ms close wait period)!


received da          
received data is   ff                     
received data is   ff                     
received data is   ff                     
Channel 2: 4 rcvd (1 pps, 4 rxerrs), 4 sent (1 pps, 0 txerrs)


        First 4 rx errs: 0c80 0c80 0c80 0c80

Receive Error Counts:                     
                                  Channel 0  Channel 1  Channel 2

Not Last in Frame                  32701792          0          0

Not First in Frame                 33180376         25          0

Address Miss                             25          0          0

Broadcast Address                  32702316   32965304

Multicast Address                         0   32965328          0

Frame Length Violation                   11          1          0

Non-Octet Alignment                       0          0          0

Short Frame                               0        113          0

CRC Error                                 1    7103092          0

Overrun                                   0          0          0

Collision                                 0          0          0

Bad Src Address                           0          0

Bad Frame Type                            0          0          0

Bad Frame Length                          0          0          0

Data Compare Errors                33308296          0          0


Transmit Error Counts:                      
                                  Channel 0  Channel 1  Channel 2

Defer Indication                   32701792          0          0

Heartbeat                          33180376         25          0

Late Collision                           25          0          0

Late Collision                           25          0          0

Retry Count                               0   32965328          0
Underrun                                 11          1          0
Carrier Sense Lost                        0          0          0

RMON(-like) Counters:
                                  Channel 0  Channel 1  Channel 2
CRC Errors                         33171496          0          0
Alignment Errors                          0          0          0
Discarded Frames                   32702316          0          0
Octets                                    0          2       4096
Collisions                                2          0          0
Broadcast Frames                   32702064          0          4
Multicast Frames                   32702032          0          0
Undersize Frames                   32965064          0          0
Fragments                          32702316          2          0
Oversize Frames                    33321116          0          0
Jabbers                                   0         25          0
64 Octet Frames                    32702016          0          0
65-127 Octet Frames                33191720          0          0
128-255 Octet Frames                      0          0          0
256-511 Octet Frames                      2          0          0
512-1023 Octet Frames              32702064          2          0
1024-1518 Octet Frames             32702032         25          4 
=>
****************************************************************************
*********************
The value I have given for patbytes is : patbytes[ELBT_NTXBD] = {0xaa, 0xbb,
0xcc, 0xdd };
But when i see the received bytes on the HyperTerminal by giving a printf
for the received bytes 
after the printf which says "Test Finished" I get the following result in
the received data:
 
received da          
received data is   ff                     
received data is   ff                     
received data is   ff                     
Channel 2: 4 rcvd (1 pps, 4 rxerrs), 4 sent (1 pps, 0 txerrs) 

Can anyone please tell me how i can remove the 4 rxerrs and get the same
data that i have transmitted.

Thanks & Regards,
Vikrant Basotra.  
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