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Fang Lu
osu-fpga
Commits
33858f9e
Commit
33858f9e
authored
7 years ago
by
Fang Lu
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Merge remote-tracking branch 'origin/jxt' into ilufang
parents
1c6f209b
96c3f4eb
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1 changed file
final_sd_interface.sv
+99
-41
99 additions, 41 deletions
final_sd_interface.sv
with
99 additions
and
41 deletions
final_sd_interface.sv
+
99
−
41
View file @
33858f9e
...
...
@@ -32,8 +32,8 @@ logic [7:0] sd_cmd_message [6], sd_cmd_message_next[6];
logic
[
10
:
0
]
counter
,
counter_next
;
logic
c_reset
;
//c_continue;
logic
sd_clk_tog
;
logic
sd_cmd_in
,
sd_dat_in
;
//
logic sd_clk_tog;
logic
sd_cmd_in
,
sd_dat_in
,
sd_cmd_in_next
;
//logic [3:0] sd_dat_buffer;
///logic sd_cmd_reg_output;
logic
[
47
:
0
]
reg_48
,
reg_48_next
;
...
...
@@ -89,6 +89,7 @@ always_ff @(posedge CLK) begin
sd_cmd_message
[
i
]
<=
8'b0
;
end
interface_status
<=
0
;
sd_cmd_in
<=
1
;
end
else
begin
state
<=
state_next
;
reg_48
<=
reg_48_next
;
...
...
@@ -98,6 +99,7 @@ always_ff @(posedge CLK) begin
sd_cmd_message
[
i
]
<=
sd_cmd_message_next
[
i
];
end
interface_status
<=
interface_status_next
;
sd_cmd_in
<=
sd_cmd_in_next
;
end
end
...
...
@@ -111,27 +113,29 @@ end
always_comb
begin
for
(
int
i
=
0
;
i
<
6
;
++
i
)
begin
sd_cmd_message_next
[
i
]
<
=
sd_cmd_message
[
i
];
sd_cmd_message_next
[
i
]
=
sd_cmd_message
[
i
];
end
sd_readdata
=
32'hCCCC
;
c_reset
=
1'b0
;
//sd_clk_tog = 0;
for
(
int
i
=
0
;
i
<
128
;
++
i
)
begin
dataBuffer_next
[
i
]
<
=
dataBuffer
[
i
];
dataBuffer_next
[
i
]
=
dataBuffer
[
i
];
end
counter_next
=
counter
;
state_next
=
state
;
sd_cmd_in_next
=
sd_cmd_in
;
reg_48_next
=
reg_48
;
reg_8_next
=
reg_8
;
interface_status_next
=
interface_status
;
interface_command_mes
=
3'b0
;
sd_cmd_in
=
1
;
//set cmd line to output
//
sd_cmd_in = 1; //set cmd line to output
sd_dat_in
=
1
;
//set data line to input
//
SD_CLK_next =
SD_CLK
;
sd_clk_tog
=
0
;
SD_CLK_next
=
1
;
//
sd_clk_tog = 0;
...
...
@@ -180,10 +184,10 @@ always_comb begin
//state case
case
(
state
)
Init
:
begin
sd_cmd_in
=
0
;
//set cmd line to output
sd_cmd_in
_next
=
1
;
sd_dat_in
=
1
;
//set data line to input
SD_CLK_next
=
1
;
sd_clk_tog
=
0
;
//
sd_clk_tog = 0;
//SD_CMD = 1;
//SD_DAT = 0;
if
(
interface_command_mes
==
3'b111
)
begin
...
...
@@ -199,47 +203,53 @@ always_comb begin
3'b001
:
begin
//send message routine
c_reset
=
1
;
sd_clk_tog
=
1
;
SD_CLK_next
=
0
;
//sd_clk_tog = 1;
//sd_cmd_reg_load = 1;
//sd_cmd_reg_input = sd_cmd_message [0];
reg_48_next
=
{
sd_cmd_message
[
0
],
sd_cmd_message
[
1
],
sd_cmd_message
[
2
],
sd_cmd_message
[
3
],
sd_cmd_message
[
4
],
sd_cmd_message
[
5
]
}
;
state_next
=
Send_cmd
;
sd_cmd_in_next
=
0
;
interface_status_next
=
2'b00
;
end
3'b010
:
begin
//receive cmd state
c_reset
=
1
;
sd_clk_tog
=
1
;
//
sd_clk_tog = 1;
//sd_cmd_rec_shift = 1;
SD_CLK_next
=
0
;
state_next
=
Receive_cmd
;
interface_status_next
=
2'b00
;
end
3'b011
:
begin
//read data state
c_reset
=
1
;
sd_clk_tog
=
1
;
//sd_clk_tog = 1;
SD_CLK_next
=
0
;
state_next
=
Read_data_0
;
interface_status_next
=
2'b00
;
end
3'b100
:
begin
//toggle 8 SD_CLK
c_reset
=
1
;
sd_clk_tog
=
1
;
//sd_clk_tog = 1;
SD_CLK_next
=
0
;
state_next
=
Dummy_clk
;
interface_status_next
=
2'b00
;
end
3'b101
:
begin
c_reset
=
1
;
sd_clk_tog
=
1
;
//sd_clk_tog = 1;
SD_CLK_next
=
0
;
state_next
=
Dummy_clk2
;
interface_status_next
=
2'b00
;
end
3'b110
:
begin
//probe read
c_reset
=
1
;
sd_clk_tog
=
1
;
//sd_clk_tog = 1;
SD_CLK_next
=
0
;
state_next
=
Receive_cmd_probe_0
;
interface_status_next
=
2'b00
;
end
...
...
@@ -249,55 +259,73 @@ always_comb begin
Send_cmd:
begin
//sd_clk_tog = 1;
sd_cmd_in
=
0
;
//set cmd line to output
//
sd_cmd_in = 0; //set cmd line to output
counter_next
=
counter
+
1
;
if
(
counter
[
0
])
if
(
counter
[
0
])
begin
reg_48_next
=
{
reg_48
[
46
:
0
],
1'b0
}
;
SD_CLK_next
=
0
;
end
else
SD_CLK_next
=
1
;
if
(
counter
==
11'b00001011111
)
begin
c_reset
=
1
;
state_next
=
Idle
;
interface_status_next
=
2'b01
;
sd_cmd_in_next
=
1
;
SD_CLK_next
=
1
;
end
else
begin
state_next
=
Send_cmd
;
sd_clk_tog
=
1
;
//
sd_clk_tog = 1;
end
end
Receive_cmd:
begin
sd_cmd_in
=
1
;
// set cmd line to be input
//
sd_cmd_in = 1; // set cmd line to be input
counter_next
=
counter
+
1
;
if
(
counter
[
0
])
begin
reg_8_next
=
{
reg_8
[
6
:
0
],
SD_CMD
}
;
end
SD_CLK_next
=
0
;
end
else
SD_CLK_next
=
1
;
if
(
counter
==
11'b00000001111
)
begin
c_reset
=
1
;
state_next
=
Idle
;
interface_status_next
=
2'b01
;
SD_CLK_next
=
1
;
end
else
begin
//sd_cmd_rec_shift = 1;
state_next
=
Receive_cmd
;
sd_clk_tog
=
1
;
//
sd_clk_tog = 1;
end
end
Receive_cmd_probe_0:
begin
counter_next
=
counter
+
1
;
sd_cmd_in
=
1
;
// set cmd line to be input
sd_clk_tog
=
1
;
//sd_cmd_in = 1; // set cmd line to be input
//sd_clk_tog = 1;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
//sd_cmd_rec_shift = 1;
state_next
=
Receive_cmd_probe_1
;
end
Receive_cmd_probe_1:
begin
counter_next
=
counter
+
1
;
sd_cmd_in
=
1
;
// set cmd line to be input
sd_clk_tog
=
1
;
//sd_cmd_in = 1; // set cmd line to be input
//sd_clk_tog = 1;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
reg_8_next
=
{
reg_8
[
6
:
0
],
SD_CMD
}
;
if
(
counter
>=
11'b00100111111
)
begin
c_reset
=
1
;
state_next
=
Init
;
interface_status_next
=
2'b11
;
SD_CLK_next
=
1
;
end
else
if
(
SD_CMD
)
begin
state_next
=
Receive_cmd_probe_0
;
end
else
begin
...
...
@@ -306,15 +334,25 @@ always_comb begin
end
Receive_cmd_probe_2:
begin
counter_next
=
counter
+
1
;
sd_cmd_in
=
1
;
// set cmd line to be input
sd_clk_tog
=
1
;
//sd_cmd_in = 1; // set cmd line to be input
//sd_clk_tog = 1;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
//sd_cmd_rec_shift = 1;
state_next
=
Receive_cmd_probe_3
;
end
Receive_cmd_probe_3:
begin
counter_next
=
counter
+
1
;
sd_cmd_in
=
1
;
// set cmd line to be input
sd_clk_tog
=
1
;
//sd_cmd_in = 1; // set cmd line to be input
//sd_clk_tog = 1;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
reg_8_next
=
{
reg_8
[
6
:
0
],
SD_CMD
}
;
if
((
!
SD_CMD
)
||
(
counter
>=
11'b00100111111
))
begin
...
...
@@ -322,6 +360,7 @@ always_comb begin
c_reset
=
1
;
state_next
=
Init
;
interface_status_next
=
2'b11
;
SD_CLK_next
=
1
;
end
else
begin
state_next
=
Receive_cmd
;
counter_next
=
11'b00000000100
;
...
...
@@ -331,12 +370,16 @@ always_comb begin
end
end
Read_data_0:
begin
sd_clk_tog
=
1
;
//sd_clk_tog = 1;
SD_CLK_next
=
1
;
state_next
=
Read_data_1
;
end
Read_data_1:
begin
sd_clk_tog
=
1
;
//sd_clk_tog = 1;
SD_CLK_next
=
0
;
if
(
SD_DAT
)
begin
state_next
=
Read_data_0
;
end
else
begin
...
...
@@ -346,6 +389,10 @@ always_comb begin
Read_data:
begin
counter_next
=
counter
+
1
;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
if
(
counter
[
0
])
begin
dataBuffer_next
[
counter
[
10
:
4
]][
{
(
counter
[
3
:
2
]),
~
counter
[
1
],
2'b11
}
]
=
SD_DAT
[
3
];
dataBuffer_next
[
counter
[
10
:
4
]][
{
(
counter
[
3
:
2
]),
~
counter
[
1
],
2'b10
}
]
=
SD_DAT
[
2
];
...
...
@@ -356,41 +403,52 @@ always_comb begin
c_reset
=
1
;
state_next
=
Idle
;
interface_status_next
=
2'b01
;
SD_CLK_next
=
1
;
end
else
begin
state_next
=
Read_data
;
sd_clk_tog
=
1
;
//
sd_clk_tog = 1;
end
end
Dummy_clk:
begin
counter_next
=
counter
+
1
;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
if
(
counter
==
11'b00000001111
)
begin
c_reset
=
1
;
state_next
=
Idle
;
interface_status_next
=
2'b01
;
SD_CLK_next
=
1
;
end
else
begin
state_next
=
Dummy_clk
;
sd_clk_tog
=
1
;
//
sd_clk_tog = 1;
end
end
//default : /* default */;
Dummy_clk2:
begin
counter_next
=
counter
+
1
;
if
(
counter
[
0
])
SD_CLK_next
=
0
;
else
SD_CLK_next
=
1
;
if
(
counter
==
11'b00000110001
)
begin
c_reset
=
1
;
state_next
=
Idle
;
interface_status_next
=
2'b01
;
SD_CLK_next
=
1
;
end
else
begin
state_next
=
Dummy_clk2
;
sd_clk_tog
=
1
;
//
sd_clk_tog = 1;
end
end
endcase
if
(
sd_clk_tog
)
SD_CLK_next
=
~
SD_CLK
;
else
SD_CLK_next
=
SD_CLK
;
//
if (
//
sd_clk_tog)
//
SD_CLK_next = ~SD_CLK;
//
else
//
SD_CLK_next = SD_CLK;
end
/*
reg_48 sd_cmd_register(.Clk(CLK),.SD_CLK(SD_CLK),.Reset(RESET),.Shift_In(1'b0),.Load(sd_cmd_reg_load),
...
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