URL https://opencores.org/ocsvn/lpffir/lpffir/trunk

Subversion Repositories lpffir

[/] [lpffir/] [trunk/] [rtl/] [lpffir_core.sv] - Diff between revs 2 and 7

Rev 2	Rev 7
Line 41...	Line 41...
`//// from http://www.opencores.org/lgpl.shtml ////`	`//// from http://www.opencores.org/lgpl.shtml ////`
`//// ////`	`//// ////`
`//////////////////////////////////////////////////////////////////////`	`//////////////////////////////////////////////////////////////////////`

`module lpffir_core (`	`module lpffir_core (`
`input [15:0] x_i,`
`input clk_i,`	`input clk_i,`
	`input rstn_i,`
	`input en_i,`
	`input [15:0] x_i,`
`output logic [15:0] y_o`	`output logic [15:0] y_o`
`);`	`);`

`reg [15:0] x1;`	`reg [15:0] x1;`
`reg [15:0] x2;`	`reg [15:0] x2;`
Line 70...	Line 72...
`rca rca_inst1 (.a(x1),.b(x4),.ci(0),.co(co1),.s(h1));`	`rca rca_inst1 (.a(x1),.b(x4),.ci(0),.co(co1),.s(h1));`
`rca rca_inst2 (.a(x2),.b(x3),.ci(0),.co(co2),.s(h2));`	`rca rca_inst2 (.a(x2),.b(x3),.ci(0),.co(co2),.s(h2));`
`rca rca_inst3 (.a(h0),.b(h1),.ci(0),.co(co3),.s(h01));`	`rca rca_inst3 (.a(h0),.b(h1),.ci(0),.co(co3),.s(h01));`
`rca rca_inst4 (.a(h01),.b(h2),.ci(0),.co(co4),.s(y_o));`	`rca rca_inst4 (.a(h01),.b(h2),.ci(0),.co(co4),.s(y_o));`

`always_ff @(posedge clk_i)`	`always_ff @(posedge clk_i or posedge rstn_i)`
	`if(!rstn_i)`
	`begin`
	`x1 <= 0;`
	`x2 <= 0;`
	`x3 <= 0;`
	`x4 <= 0;`
	`x5 <= 0;`
	`end`
	`else if (en_i)`
`begin`	`begin`
`x1 <= x_i;`	`x1 <= x_i;`
`x2 <= x1;`	`x2 <= x1;`
`x3 <= x2;`	`x3 <= x2;`
`x4 <= x3;`	`x4 <= x3;`