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Subversion Repositories 1g_ethernet_dpi

[/] [1g_ethernet_dpi/] [tags/] [vmblite_base/] [hw/] [src/] [tb/] [uart_rx_if.sv] - Blame information for rev 7

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Line No.	Rev	Author	Line
1	7	kuzmi4	`//////////////////////////////////////////////////////////////////////////////////`
2			`// Company:`
3			`// Engineer: IK`
4			`//`
5			`// Create Date: 11:35:01 03/21/2013`
6			`// Design Name:`
7			`// Module Name: uart_rx_if`
8			`// Project Name:`
9			`// Target Devices:`
10			`// Tool versions:`
11			`// Description:`
12			`//`
13			`//`
14			`// Revision:`
15			`// Revision 0.01 - File Created, {8N1}-cfg`
16			`//`
17			`//////////////////////////////////////////////////////////////////////////////////`
18			`timescale 1ns / 1ps
19
20			`interface uart_rx_if`
21			`(`
22			`input i_rxd`
23			`);`
24			`//////////////////////////////////////////////////////////////////////////////////`
25			`//`
26			`typedef struct {`
27			`int speed_bod;`
28			`int speed_ns;`
29			`int speed_ns_half;`
30			`} cfg_t;`
31			`//////////////////////////////////////////////////////////////////////////////////`
32			`// RXD`
33			`bit [ 7:0] sv_rxd;`
34			`// ??`
35			`cfg_t sv_cfg;`
36
37			`//////////////////////////////////////////////////////////////////////////////////`
38			`//`
39			`task init(input int ii_speed=115_200);`
40			`//`
41			`sv_rxd = 0;`
42			`//`
43			`sv_cfg.speed_bod = ii_speed;`
44			`sv_cfg.speed_ns = (10**9)/ii_speed;`
45			`sv_cfg.speed_ns_half = sv_cfg.speed_ns/2;`
46
47			`// Final`
48			`endtask : init`
49
50			`task rxd;`
51			`// dec vars`
52			`bit s_done;`
53			`// wait`
54			`@(negedge i_rxd);`
55			`// Data framing`
56			`s_done = 0;`
57			`for (int i = 0 ; i < 1+8+1; i++) // => sta+[0:7]+stp`
58			`begin : DFRAME`
59			`case(i)`
60			`// START`
61
62			`#(sv_cfg.speed_ns_half*1ns);`
63			`if (i_rxd) // must be LOW`
64			`break; // exit-loop`
65			`end`
66			`// STOP`
67			`9 : begin`
68			`#(sv_cfg.speed_ns*1ns);`
69			`if (i_rxd) // must be HIGH`
70			`s_done = 1;`
71			`end`
72			`// DATA`
73			`default : begin`
74			`#(sv_cfg.speed_ns*1ns);`
75			`sv_rxd[i-1] = i_rxd;`
76			`end`
77			`endcase`
78			`end`
79			`//`
80			`if (s_done)`
81			`$display("[%t]: %m: rxd=%x / %c", $time, sv_rxd, (sv_rxd == 8'h0a)? " " : sv_rxd);`
82			`else`
83			`$display("[%t]: %m: rx-err", $time);`
84			`// Final`
85			`endtask : rxd`
86			`//////////////////////////////////////////////////////////////////////////////////`
87			`endinterface : uart_rx_if`

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Subversion Repositories 1g_ethernet_dpi

[/] [1g_ethernet_dpi/] [tags/] [vmblite_base/] [hw/] [src/] [tb/] [uart_rx_if.sv] - Blame information for rev 7