EmbDev.net

Forum: FPGA, VHDL & Verilog Spartan 6, PCS/PMA Ethernet 1000BASE-X


von Alexander L. (lutovid)


Attached files:

Rate this post
useful
not useful
Hi

I am using IP core Ethernet 1000BASE-X PCS/PMA or SGMII v.11.5,  and i 
have a problem with transmitting frame from PCS/PMA to GTP transciever 
while using gmii user interface - according datasheet I turn gmii_tx_en 
on first octet of preambule and turn it down at the end of frame, so i 
thought that out signal from PCS/PMA will be like <interframe gap><my 
frame><interframe gap>. But chip scope shows that instead of the first 
octet of my frame placed FB(hex) byte, and at the end of frame added 5 
bytes. So as I understand, I have broken frame as result. Could anybody 
help?

Sorry for my english)

: Edited by User
von coding expert (Guest)


Rate this post
useful
not useful
to my my your preamble is not ok

von Alexander L. (lutovid)


Rate this post
useful
not useful
10101010 10101010 10101010 10101010 10101010 10101010 10101010 10101011 
this is standart preambule in ethernet, and here it is on the 1st 
picture but it comes as "downto" 55 = 01010101 and D5 = 11010101

von RIM (Guest)


Attached files:

Rate this post
useful
not useful
help me

von RIM (Guest)


Attached files:

Rate this post
useful
not useful
mon projet affichage par écran tactile a l'aide d'une carte spartan 
6XC6LX16-CS324

Please log in before posting. Registration is free and takes only a minute.
Existing account
Do you have a Google/GoogleMail account? No registration required!
Log in with Google account
No account? Register here.