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


Author: Alexander Lutovid (lutovid)
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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
Author: coding expert (Guest)
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to my my your preamble is not ok

Author: Alexander Lutovid (lutovid)
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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

Author: RIM (Guest)
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help me

Author: RIM (Guest)
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mon projet affichage par écran tactile a l'aide d'une carte spartan 
6XC6LX16-CS324

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