Behaviotal Modeling part 3

... signal value. The keyword posedge is used for a positive transition, as shown in Example 7- 13 . Example 7- 13 Regular Event Control @(clock) q = d; //q = d is executed whenever signal clock changes ... in the //sensitivity list. always @(*) begin out1 = a ? b+c : d+e; out2 = f ? g+h : p+m; end 7 .3. 3 Level-Sensitive Timing Control Event control discussed earlier waited for the change of a...

Ngày tải lên: 07/11/2013, 19:15

... as follows. time statement executed 0 m = 1'b0; 5 a = 1'b1; 10 x = 1'b0; 30 b = 1'b0; 35 y = 1'b1; 50 $finish; The initial blocks are typically used for initialization, ... port/data declaration can also be combined with an initialization. Example 7 -3 shows such a declaration. Example 7 -3 Combined Port/Data Declaration and Variable Initialization module adder (s...

Ngày tải lên: 28/10/2013, 22:15

... addr[0]) • A part select of these variables (e.g., addr [31 :16]) • A concatenation of any of the above The right-hand side can be any expression that evaluates to a value. In behavioral modeling, ... reg_a[2] = 1'b1; //Bit select assignment with delay #10 reg_b[15: 13] = {x, y, z} //Assign result of concatenation to // part select of a vector count = count + 1; //Assignment to an i...

Ngày tải lên: 28/10/2013, 22:15

... mux4_to_1 (out, i0, i1, i2, i3, s1, s0); // Port declarations from the I/O diagram output out; input i0, i1, i2, i3; input s1, s0; reg out; always @(s1 or s0 or i0 or i1 or i2 or i3) case ({s1, s0}) //Switch ... demultiplexer1_to_4 (out0, out1, out2, out3, in, s1, s0); // Port declarations from the I/O diagram output out0, out1, out2, out3; reg out0, out1, out2, out3; input in; input s1, s0;...

Ngày tải lên: 07/11/2013, 19:15

... elements 'define MAX_STATES 32 integer state [0: 'MAX_STATES-1]; //Integer array state with elements 0 :31 integer i; initial begin for(i = 0; i < 32 ; i = i + 2) //initialize all even ... the control variable The counter described in Example 7-22 can be coded as a for loop (Example 7- 23) . The initialization condition and the incrementing procedural assignment are included in...

Ngày tải lên: 07/11/2013, 19:15

... r_loop [3] .g1 r_loop[0].g2, r_loop[1].g2, r_loop[2].g2, r_loop [3] .g2 // and : r_loop[0].g3, r_loop[1].g3, r_loop[2].g3, r_loop [3] .g3 r_loop[0].g4, r_loop[1].g4, r_loop[2].g4, r_loop [3] .g4 ... r_loop[1].t1, r_loop[1].t2, r_loop[1].t3 // r_loop[2].t1, r_loop[2].t2, r_loop[2].t3 // r_loop [3] .t1, r_loop [3] .t2, r_loop [3] .t3 assign co = carry[N]; endmodule 7.8.2 Generate...

Ngày tải lên: 15/12/2013, 03:15

... using the disable statement as shown in Example 7 -30 . The disable statement terminates the while loop as soon as a true bit is seen. Example 7 -30 Disabling Named Blocks //Illustration: Find the ... z = {x, y}; //completes at simulation time 15 #20 w = {y, x}; //completes at simulation time 35 end Parallel blocks Parallel blocks, specified by keywords fork and join, provide interes...

Ngày tải lên: 15/12/2013, 03:15

... model y(x)=y(x;a, b)=a+bx (15.2.1) 662 Chapter 15. Modeling of Data Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521- 431 08-5) Copyright (C) 1988-1992 by Cambridge ... parameters a and b. 15.2 Fitting Data to a Straight Line 6 63 Sample page from NUMERICAL RECIPES IN C: THE ART OF SCIENTIFIC COMPUTING (ISBN 0-521- 431 08-5) Copyright (C) 1988-1992 by Ca...

Ngày tải lên: 15/12/2013, 04:15

... = 32 'h0000_0006 $fdisplay(desc2, "Display 2");//write to files file1.out & file2.out desc3 = handle3 ; //desc3 = 32 'h0000_0008 $fdisplay(desc3, "Display 3& quot;);//write ... $fopen("file2.out"); //handle2 = 32 'h0000_0004 (bit 2 set) handle3 = $fopen("file3.out"); //handle3 = 32 'h0000_0008 (bit 3 set) end The ad...

Ngày tải lên: 26/01/2014, 14:20

Ngày tải lên: 06/08/2012, 14:59