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Rev 188 → Rev 187

/trunk/bench/verilog/eth_phy.v
41,9 → 41,6
// CVS Revision History
//
// $Log: not supported by cvs2svn $
// Revision 1.3 2002/09/13 14:50:15 mohor
// Bug in MIIM fixed.
//
// Revision 1.2 2002/09/13 12:29:14 mohor
// Headers changed.
//
825,18 → 822,10
reg task_mcoll;
// carrier sense signal set or rest within task for controling carrier sense
reg task_mcrs;
reg task_mcrs_lost;
// do not generate collision in half duplex - not normal operation
reg no_collision_in_half_duplex;
// generate collision in full-duplex mode also - not normal operation
reg collision_in_full_duplex;
// do not generate carrier sense in half duplex mode - not normal operation
reg no_carrier_sense_in_tx_half_duplex;
reg no_carrier_sense_in_rx_half_duplex;
// generate carrier sense during TX in full-duplex mode also - not normal operation
reg carrier_sense_in_tx_full_duplex;
// do not generate carrier sense during RX in full-duplex mode - not normal operation
reg no_carrier_sense_in_rx_full_duplex;
// on RX: delay after carrier sense signal; on TX: carrier sense delayed (delay is one clock period)
reg real_carrier_sense;
 
846,19 → 835,14
mcrs_tx = 0;
task_mcoll = 0;
task_mcrs = 0;
task_mcrs_lost = 0;
no_collision_in_half_duplex = 0;
collision_in_full_duplex = 0;
no_carrier_sense_in_tx_half_duplex = 0;
no_carrier_sense_in_rx_half_duplex = 0;
carrier_sense_in_tx_full_duplex = 0;
no_carrier_sense_in_rx_full_duplex = 0;
real_carrier_sense = 0;
end
 
// Collision
always@(m_rst_n_i or control_bit8_0 or collision_in_full_duplex or
mcrs_rx or mcrs_tx or task_mcoll or no_collision_in_half_duplex
mcrs_rx or mcrs_tx or task_mcoll
)
begin
if (!m_rst_n_i)
869,7 → 853,7
begin
if (collision_in_full_duplex) // collision is usually not asserted in full duplex
begin
mcoll_o = ((mcrs_rx && mcrs_tx) || task_mcoll);
mcoll_o = (mcrs_rx && mcrs_tx) || task_mcoll;
`ifdef VERBOSE
if (mcrs_rx && mcrs_tx)
$fdisplay(phy_log, " (%0t)(%m) Collision set in FullDuplex!", $time);
888,8 → 872,7
end
else // half duplex
begin
mcoll_o = ((mcrs_rx && mcrs_tx && !no_collision_in_half_duplex) ||
task_mcoll);
mcoll_o = (mcrs_rx && mcrs_tx) || task_mcoll;
`ifdef VERBOSE
if (mcrs_rx && mcrs_tx)
$fdisplay(phy_log, " (%0t)(%m) Collision set in HalfDuplex!", $time);
902,10 → 885,7
 
// Carrier sense
always@(m_rst_n_i or control_bit8_0 or carrier_sense_in_tx_full_duplex or
no_carrier_sense_in_rx_full_duplex or
no_carrier_sense_in_tx_half_duplex or
no_carrier_sense_in_rx_half_duplex or
mcrs_rx or mcrs_tx or task_mcrs or task_mcrs_lost
mcrs_rx or mcrs_tx or task_mcrs
)
begin
if (!m_rst_n_i)
915,17 → 895,13
if (control_bit8_0[8]) // full duplex
begin
if (carrier_sense_in_tx_full_duplex) // carrier sense is usually not asserted during TX in full duplex
mcrs_o = ((mcrs_rx && !no_carrier_sense_in_rx_full_duplex) ||
mcrs_tx || task_mcrs) && !task_mcrs_lost;
mcrs_o = mcrs_rx || mcrs_tx || task_mcrs;
else
mcrs_o = ((mcrs_rx && !no_carrier_sense_in_rx_full_duplex) ||
task_mcrs) && !task_mcrs_lost;
mcrs_o = mcrs_rx || task_mcrs;
end
else // half duplex
begin
mcrs_o = ((mcrs_rx && !no_carrier_sense_in_rx_half_duplex) ||
(mcrs_tx && !no_carrier_sense_in_tx_half_duplex) ||
task_mcrs) && !task_mcrs_lost;
mcrs_o = mcrs_rx || mcrs_tx || task_mcrs;
end
end
end
1291,22 → 1267,6
end
endtask
 
// Carrier sense lost - higher priority than Carrier sense task
task carrier_sense_lost;
input test_op;
begin
#1 task_mcrs_lost = test_op;
end
endtask
 
// No collision detection in half duplex
task no_collision_hd_detect;
input test_op;
begin
#1 no_collision_in_half_duplex = test_op;
end
endtask
 
// Collision detection in full duplex also
task collision_fd_detect;
input test_op;
1315,22 → 1275,6
end
endtask
 
// No carrier sense detection at TX in half duplex
task no_carrier_sense_tx_hd_detect;
input test_op;
begin
#1 no_carrier_sense_in_tx_half_duplex = test_op;
end
endtask
 
// No carrier sense detection at RX in half duplex
task no_carrier_sense_rx_hd_detect;
input test_op;
begin
#1 no_carrier_sense_in_rx_half_duplex = test_op;
end
endtask
 
// Carrier sense detection at TX in full duplex also
task carrier_sense_tx_fd_detect;
input test_op;
1339,15 → 1283,7
end
endtask
 
// No carrier sense detection at RX in full duplex
task no_carrier_sense_rx_fd_detect;
input test_op;
begin
#1 no_carrier_sense_in_rx_full_duplex = test_op;
end
endtask
 
// Set real delay on carrier sense signal (and therefor collision signal)
// Set real delay on carrier sense signal
task carrier_sense_real_delay;
input test_op;
begin

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