-
Notifications
You must be signed in to change notification settings - Fork 0
/
hardware.v
132 lines (110 loc) · 3.33 KB
/
hardware.v
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
module hardware (
input clk_16mhz,
inout user_led,
inout pin_1,
inout pin_2,
inout pin_3,
inout pin_4,
inout pin_5,
inout pin_6,
inout pin_7,
inout pin_8,
inout pin_9,
inout pin_10,
inout pin_11,
inout pin_12,
inout pin_13,
output flash_csb,
output flash_clk,
inout flash_io0,
inout flash_io1,
inout flash_io2,
inout flash_io3
);
wire clk = clk_16mhz;
reg [5:0] reset_cnt = 0;
wire rstn = &reset_cnt;
always @ (posedge clk) reset_cnt = reset_cnt + !rstn;
wire flash_io0_oe, flash_io0_do, flash_io0_di;
wire flash_io1_oe, flash_io1_do, flash_io1_di;
wire flash_io2_oe, flash_io2_do, flash_io2_di;
wire flash_io3_oe, flash_io3_do, flash_io3_di;
wire iomem_valid;
wire [31:0] iomem_addr;
wire [31:0] iomem_wdata;
wire [3:0] iomem_wstrb;
wire gpio_valid = iomem_valid && iomem_addr[31:16] == 28'h0300;
wire gpio_ready;
wire [31:0] gpio_rdata;
wire iomem_ready = (gpio_valid && gpio_ready);
wire [31:0] iomem_rdata = gpio_valid ? gpio_rdata : 32'h00000000;
wire ser_tx;
wire ser_rx;
soc #(
.ICACHE_DEPTH(6),
.RAM_DEPTH(11)
) soc (
.clk(clk), .rstn(rstn),
.iomem_valid(iomem_valid), .iomem_ready(iomem_ready),
.iomem_addr(iomem_addr), .iomem_rdata(iomem_rdata),
.iomem_wdata(iomem_wdata), .iomem_wstrb(iomem_wstrb),
.flash_csb(flash_csb), .flash_clk(flash_clk),
.flash_io0_oe(flash_io0_oe),
.flash_io1_oe(flash_io1_oe),
.flash_io2_oe(flash_io2_oe),
.flash_io3_oe(flash_io3_oe),
.flash_io0_do(flash_io0_do),
.flash_io1_do(flash_io1_do),
.flash_io2_do(flash_io2_do),
.flash_io3_do(flash_io3_do),
.flash_io0_di(flash_io0_di),
.flash_io1_di(flash_io1_di),
.flash_io2_di(flash_io2_di),
.flash_io3_di(flash_io3_di),
.ser_tx(ser_tx),
.ser_rx(ser_rx)
);
SB_IO #(
.PIN_TYPE(6'b 1010_01),
.PULLUP(1'b 0)
) flash_io_buf [3:0] (
.PACKAGE_PIN({flash_io3, flash_io2, flash_io1, flash_io0}),
.OUTPUT_ENABLE({flash_io3_oe, flash_io2_oe, flash_io1_oe, flash_io0_oe}),
.D_OUT_0({flash_io3_do, flash_io2_do, flash_io1_do, flash_io0_do}),
.D_IN_0({flash_io3_di, flash_io2_di, flash_io1_di, flash_io0_di})
);
wire [31:0] gpio_oe;
wire [31:0] gpio_do;
wire [31:0] gpio_di;
wire [31:0] alt_oe;
wire [31:0] alt_do;
wire [31:0] alt_di;
assign alt_oe[3] = 0;
assign ser_rx = alt_di[3];
assign alt_oe[4] = 1;
assign alt_do[4] = ser_tx;
mem_gpio gpio (
.clk(clk), .rstn(rstn),
.mem_valid(gpio_valid),
.mem_ready(gpio_ready),
.mem_addr(iomem_addr),
.mem_rdata(gpio_rdata),
.mem_wdata(iomem_wdata),
.mem_wstrb(iomem_wstrb),
.gpio_oe(gpio_oe),
.gpio_do(gpio_do),
.gpio_di(gpio_di),
.alt_oe(alt_oe),
.alt_do(alt_do),
.alt_di(alt_di)
);
SB_IO #(
.PIN_TYPE(6'b101001),
.PULLUP(1'b1)
) gpio_buf [13:0] (
.PACKAGE_PIN({pin_13, pin_12, pin_11, pin_10, pin_9, pin_8, pin_7, pin_6, pin_5, pin_4, pin_3, pin_2, pin_1, user_led}),
.OUTPUT_ENABLE(gpio_oe[13:0]),
.D_OUT_0(gpio_do[13:0]),
.D_IN_0(gpio_di[13:0])
);
endmodule