diff options
Diffstat (limited to 'usrp2/extram/wb_zbt16_b.v')
-rw-r--r-- | usrp2/extram/wb_zbt16_b.v | 63 |
1 files changed, 0 insertions, 63 deletions
diff --git a/usrp2/extram/wb_zbt16_b.v b/usrp2/extram/wb_zbt16_b.v deleted file mode 100644 index d93e21c99..000000000 --- a/usrp2/extram/wb_zbt16_b.v +++ /dev/null @@ -1,63 +0,0 @@ - -module wb_zbt16_b - (input clk, - input rst, - // Wishbone bus A, highest priority, with prefetch - input [19:0] wb_adr_i, - input [15:0] wb_dat_i, - output reg [15:0] wb_dat_o, - input [ 1:0] wb_sel_i, - input wb_cyc_i, - input wb_stb_i, - output reg wb_ack_o, - input wb_we_i, - // Memory connection - output sram_clk, - output [18:0] sram_a, - inout [15:0] sram_d, - output sram_we, - output [ 1:0] sram_bw, - output sram_adv, - output sram_ce, - output sram_oe, - output sram_mode, - output sram_zz - ); - - assign sram_clk = ~clk; - //assign sram_oe = 1'b0; - assign sram_ce = 1'b0; - assign sram_adv = 1'b0; - assign sram_mode = 1'b0; - assign sram_zz = 1'b0; - assign sram_bw = 2'b0; - - // need to drive wb_dat_o, wb_ack_o, - // sram_a, sram_d, sram_we - wire myOE; - assign sram_d = myOE ? wb_dat_i : 16'bzzzz; - assign sram_a = wb_adr_i[19:1]; - - reg read_d1, read_d2, read_d3, write_d1, write_d2, write_d3; - wire acc = wb_cyc_i & wb_stb_i; - wire read_acc = wb_cyc_i & wb_stb_i & ~wb_we_i & ~read_d1 & ~read_d2 & ~read_d3; - wire write_acc = wb_cyc_i & wb_stb_i & wb_we_i & ~write_d1 & ~write_d2 & ~write_d3; - - assign sram_we = ~write_acc; - assign sram_oe = ~(read_d2 | read_d3); - assign myOE = write_d1 | write_d2; - wire latch_now = read_d2; - - always @(posedge clk) - if(latch_now) - wb_dat_o <= sram_d; - - always @(posedge clk) wb_ack_o <= read_d2 | write_d2; - always @(posedge clk) read_d1 <= read_acc; - always @(posedge clk) read_d2 <= read_d1; - always @(posedge clk) read_d3 <= read_d2; - always @(posedge clk) write_d1 <= write_acc; - always @(posedge clk) write_d2 <= write_d1; - always @(posedge clk) write_d3 <= write_d2; -endmodule // wb_zbt16_b - |