| Line 44... |
Line 44... |
// use to enable global buffers for high fan out signals such as clock and reset
|
// use to enable global buffers for high fan out signals such as clock and reset
|
altera
|
altera
|
// ALTERA
|
// ALTERA
|
//ACTEL
|
//ACTEL
|
// sync reset
|
// sync reset
|
// input active lo async reset, normally from external reset generetaor and/or switch
|
// input active lo async reset, normally from external reset generator and/or switch
|
// output active high global reset sync with two DFFs
|
// output active high global reset sync with two DFFs
|
`timescale 1 ns/100 ps
|
`timescale 1 ns/100 ps
|
module vl_sync_rst ( rst_n_i, rst_o, clk);
|
module vl_sync_rst ( rst_n_i, rst_o, clk);
|
input rst_n_i, clk;
|
input rst_n_i, clk;
|
output rst_o;
|
output rst_o;
|
reg [0:1] tmp;
|
reg [0:1] tmp;
|
always @ (posedge clk or negedge rst_n_i)
|
always @ (posedge clk or negedge rst_n_i)
|
if (!rst_n_i)
|
if (!rst_n_i)
|
tmp <= 2'b00;
|
tmp <= 2'b11;
|
else
|
else
|
tmp <= {1'b1,tmp[0]};
|
tmp <= {1'b0,tmp[0]};
|
vl_gbuf buf_i0( .i(tmp[1]), .o(rst_o));
|
vl_gbuf buf_i0( .i(tmp[0]), .o(rst_o));
|
endmodule
|
endmodule
|
// vl_pll
|
// vl_pll
|
//altera
|
//altera
|
//actel
|
//actel
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
| Line 278... |
Line 278... |
input d, le;
|
input d, le;
|
output q;
|
output q;
|
input clk;
|
input clk;
|
dff_sr i0 (.aclr(), .aset(), .clock(1'b1), .data(1'b1), .q(q));
|
dff_sr i0 (.aclr(), .aset(), .clock(1'b1), .data(1'b1), .q(q));
|
endmodule
|
endmodule
|
|
module shreg ( d, q, clk, rst);
|
|
parameter depth = 10;
|
|
input d;
|
|
output q;
|
|
input clk, rst;
|
|
reg [1:depth] dffs;
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
dffs <= {depth{1'b0}};
|
|
else
|
|
dffs <= {d,dffs[1:depth-1]};
|
|
assign q = dffs[depth];
|
|
endmodule
|
|
module shreg_ce ( d, ce, q, clk, rst);
|
|
parameter depth = 10;
|
|
input d, ce;
|
|
output q;
|
|
input clk, rst;
|
|
reg [1:depth] dffs;
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
dffs <= {depth{1'b0}};
|
|
else
|
|
if (ce)
|
|
dffs <= {d,dffs[1:depth-1]};
|
|
assign q = dffs[depth];
|
|
endmodule
|
module delay ( d, q, clk, rst);
|
module delay ( d, q, clk, rst);
|
parameter depth = 10;
|
parameter depth = 10;
|
input d;
|
input d;
|
output q;
|
output q;
|
input clk, rst;
|
input clk, rst;
|
| Line 291... |
Line 318... |
dffs <= {depth{1'b0}};
|
dffs <= {depth{1'b0}};
|
else
|
else
|
dffs <= {d,dffs[1:depth-1]};
|
dffs <= {d,dffs[1:depth-1]};
|
assign q = dffs[depth];
|
assign q = dffs[depth];
|
endmodule
|
endmodule
|
|
module delay_emptyflag ( d, q, emptyflag, clk, rst);
|
|
parameter depth = 10;
|
|
input d;
|
|
output q, emptyflag;
|
|
input clk, rst;
|
|
reg [1:depth] dffs;
|
|
always @ (posedge clk or posedge rst)
|
|
if (rst)
|
|
dffs <= {depth{1'b0}};
|
|
else
|
|
dffs <= {d,dffs[1:depth-1]};
|
|
assign q = dffs[depth];
|
|
assign emptyflag = !(|dffs);
|
|
endmodule
|
//////////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////////
|
//// ////
|
//// ////
|
//// Versatile counter ////
|
//// Versatile counter ////
|
//// ////
|
//// ////
|
//// Description ////
|
//// Description ////
|
| Line 1894... |
Line 1935... |
.b_fifo_empty(b_fifo_empty),
|
.b_fifo_empty(b_fifo_empty),
|
.b_clk(wbm_clk),
|
.b_clk(wbm_clk),
|
.b_rst(wbm_rst)
|
.b_rst(wbm_rst)
|
);
|
);
|
endmodule
|
endmodule
|
|
// WB ROM
|
|
module wb_boot_rom (
|
|
wb_adr_i, wb_stb_i, wb_cyc_i,
|
|
wb_dat_o, wb_ack_o, wb_clk, wb_rst);
|
|
//E2_ifndef BOOT_ROM
|
|
//E2_define BOOT_ROM "boot_rom.v"
|
|
//E2_endif
|
|
parameter addr_width = 5;
|
|
input [(addr_width+2)-1:2] wb_adr_i;
|
|
input wb_stb_i;
|
|
input wb_cyc_i;
|
|
output reg [31:0] wb_dat_o;
|
|
output reg wb_ack_o;
|
|
input wb_clk;
|
|
input wb_rst;
|
|
always @ (posedge wb_clk or posedge wb_rst)
|
|
if (wb_rst)
|
|
wb_dat_o <= 32'h15000000;
|
|
else
|
|
case (wb_adr_i)
|
|
//E2_include `BOOT_ROM
|
|
/*
|
|
// Zero r0 and jump to 0x00000100
|
|
0 : wb_dat_o <= 32'h18000000;
|
|
1 : wb_dat_o <= 32'hA8200000;
|
|
2 : wb_dat_o <= 32'hA8C00100;
|
|
3 : wb_dat_o <= 32'h44003000;
|
|
4 : wb_dat_o <= 32'h15000000;
|
|
*/
|
|
default:
|
|
wb_dat_o <= 32'h00000000;
|
|
endcase // case (wb_adr_i)
|
|
always @ (posedge wb_clk or posedge wb_rst)
|
|
if (wb_rst)
|
|
wb_ack_o <= 1'b0;
|
|
else
|
|
wb_ack_o <= wb_stb_i & wb_cyc_i & !wb_ack_o;
|
|
endmodule
|
|
|
No newline at end of file
|
No newline at end of file
|
