diff options
Diffstat (limited to 'usrp2/fpga/eth/mac_txfifo_int.v')
-rw-r--r-- | usrp2/fpga/eth/mac_txfifo_int.v | 77 |
1 files changed, 0 insertions, 77 deletions
diff --git a/usrp2/fpga/eth/mac_txfifo_int.v b/usrp2/fpga/eth/mac_txfifo_int.v deleted file mode 100644 index 38d8d38fc..000000000 --- a/usrp2/fpga/eth/mac_txfifo_int.v +++ /dev/null @@ -1,77 +0,0 @@ - -module mac_txfifo_int - (input clk, input rst, input mac_clk, - - // To MAC - input Tx_mac_wa, - output Tx_mac_wr, - output [31:0] Tx_mac_data, - output [1:0] Tx_mac_BE, - output Tx_mac_sop, - output Tx_mac_eop, - - // To buffer interface - input [31:0] rd_dat_i, - output rd_read_o, - output rd_done_o, - output rd_error_o, - input rd_sop_i, - input rd_eop_i, - - // FIFO Status - output [15:0] fifo_occupied, - output fifo_full, - output fifo_empty ); - - wire empty, full, sfifo_write, sfifo_read; - wire [33:0] sfifo_in, sfifo_out; - - /* - shortfifo #(.WIDTH(34)) txmac_sfifo - (.clk(clk),.rst(rst),.clear(0), - .datain(sfifo_in),.write(sfifo_write),.full(full), - .dataout(sfifo_out),.read(sfifo_read),.empty(empty)); - */ - fifo_xlnx_512x36_2clk mac_tx_fifo_2clk - (.rst(rst), - .wr_clk(clk),.din({2'b0,sfifo_in}),.full(full),.wr_en(sfifo_write),.wr_data_count(fifo_occupied[8:0]), - .rd_clk(mac_clk),.dout(sfifo_out),.empty(empty),.rd_en(sfifo_read),.rd_data_count() ); - assign fifo_occupied[15:9] = 0; - assign fifo_full = full; - assign fifo_empty = empty; // Note empty is in wrong clock domain - - // MAC side signals - // We are allowed to do one more write after we are told the FIFO is full - // This allows us to register the _wa signal and speed up timing. - - reg tx_mac_wa_d1; - always @(posedge clk) - tx_mac_wa_d1 <= Tx_mac_wa; - - assign sfifo_read = ~empty & tx_mac_wa_d1; - - assign Tx_mac_wr = sfifo_read; - assign Tx_mac_data = sfifo_out[31:0]; - assign Tx_mac_BE = 0; // Since we only deal with packets that are multiples of 32 bits long - assign Tx_mac_sop = sfifo_out[33]; - assign Tx_mac_eop = sfifo_out[32]; - - - // BUFFER side signals - reg xfer_active; - always @(posedge clk) - if(rst) - xfer_active <= 0; - else if(rd_eop_i & ~full) - xfer_active <= 0; - else if(rd_sop_i) - xfer_active <= 1; - - assign sfifo_in = {rd_sop_i, rd_eop_i, rd_dat_i}; - assign sfifo_write = xfer_active & ~full; - - assign rd_read_o = sfifo_write; - assign rd_done_o = 0; // Always send everything we're given? - assign rd_error_o = 0; // No possible error situations? - -endmodule // mac_txfifo_int |