glbl.v

spi接口的vhdl实现

`timescale  1 ps / 1 ps

module glbl ();

    parameter ROC_WIDTH = 100000;
    parameter TOC_WIDTH = 0;

    wire GSR;
    wire GTS;
    wire PRLD;

    reg GSR_int;
    reg GTS_int;
    reg PRLD_int;

//--------   JTAG Globals --------------
    wire JTAG_TDO_GLBL;
    wire JTAG_TCK_GLBL;
    wire JTAG_TDI_GLBL;
    wire JTAG_TMS_GLBL;
    wire JTAG_TRST_GLBL;

    reg JTAG_CAPTURE_GLBL;
    reg JTAG_RESET_GLBL;
    reg JTAG_SHIFT_GLBL;
    reg JTAG_UPDATE_GLBL;

    reg JTAG_SEL1_GLBL = 0;
    reg JTAG_SEL2_GLBL = 0 ;
    reg JTAG_SEL3_GLBL = 0;
    reg JTAG_SEL4_GLBL = 0;

    reg JTAG_USER_TDO1_GLBL = 1'bz;
    reg JTAG_USER_TDO2_GLBL = 1'bz;
    reg JTAG_USER_TDO3_GLBL = 1'bz;
    reg JTAG_USER_TDO4_GLBL = 1'bz;

    assign (weak1, weak0) GSR = GSR_int;
    assign (weak1, weak0) GTS = GTS_int;
    assign (weak1, weak0) PRLD = PRLD_int;

    initial begin
	GSR_int = 1'b1;
	PRLD_int = 1'b1;
	#(ROC_WIDTH)
	GSR_int = 1'b0;
	PRLD_int = 1'b0;
    end

    initial begin
	GTS_int = 1'b1;
	#(TOC_WIDTH)
	GTS_int = 1'b0;
    end

endmodule