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`include "util.svh"
module panel
#( DEBOUNCE_MAX = 100
)
( input bit clk
, input bit reset
, input bit [8:1][12:1] led
, output bit [3:1][12:1] switch
, inout wire [10:1] gpioa
, inout wire [28:13] gpiob
, inout wire [40:31] gpioc
);
localparam DEBOUNCE_BITS = $clog2(DEBOUNCE_MAX+1);
enum
{ LED_ROW1
, DEAD_ROW2
, LED_ROW2
, DEAD_ROW3
, LED_ROW3
, DEAD_ROW4
, LED_ROW4
, DEAD_ROW5
, LED_ROW5
, DEAD_ROW6
, LED_ROW6
, DEAD_ROW7
, LED_ROW7
, DEAD_ROW8
, LED_ROW8
, DEAD_ROW9
, SWITCH_PREP
, SWITCH_ROW1
, SWITCH_ROW2
, SWITCH_ROW3
} state;
bit [3:1][12:1] switch_raw;
bit [DEBOUNCE_BITS-1:0] switch_debounce;
`define LEDROW1 gpioc[38]
`define LEDROW2 gpioc[40]
`define LEDROW3 gpiob[15]
`define LEDROW4 gpiob[16]
`define LEDROW5 gpiob[18]
`define LEDROW6 gpiob[22]
`define LEDROW7 gpioc[37]
`define LEDROW8 gpiob[13]
`define SWROW1 gpioc[36]
`define SWROW2 gpioa[1]
`define SWROW3 gpioa[2]
`define COL1 gpioa[8]
`define COL2 gpioa[10]
`define COL3 gpioa[7]
`define COL4 gpiob[27]
`define COL5 gpioc[31]
`define COL6 gpiob[26]
`define COL7 gpiob[24]
`define COL8 gpiob[21]
`define COL9 gpiob[19]
`define COL10 gpiob[23]
`define COL11 gpioc[32]
`define COL12 gpioc[33]
`define DO_LEDS
`define DO_SWITCHES
always_ff @(posedge clk) begin
// LED rows (active high)
`LEDROW1 = 1'b0;
`LEDROW2 = 1'b0;
`LEDROW3 = 1'b0;
`LEDROW4 = 1'b0;
`LEDROW5 = 1'b0;
`LEDROW6 = 1'b0;
`LEDROW7 = 1'b0;
`LEDROW8 = 1'b0;
// Switch rows (active low)
`SWROW1 = 1'b1;
`SWROW2 = 1'b1;
`SWROW3 = 1'b1;
if (reset) begin
switch = 0;
switch_raw = 0;
switch_debounce = 0;
state = state.first;
end else begin
automatic bit [3:1][12:1] new_switch = switch_raw;
case (state)
`ifdef DO_LEDS
`define LED_ROW(n) \
LED_ROW``n: begin \
`LEDROW``n = 1'b1; \
`COL1 = ~led[n][1]; \
`COL2 = ~led[n][2]; \
`COL3 = ~led[n][3]; \
`COL4 = ~led[n][4]; \
`COL5 = ~led[n][5]; \
`COL6 = ~led[n][6]; \
`COL7 = ~led[n][7]; \
`COL8 = ~led[n][8]; \
`COL9 = ~led[n][9]; \
`COL10 = ~led[n][10]; \
`COL11 = ~led[n][11]; \
`COL12 = ~led[n][12]; \
end
`LED_ROW(1)
`LED_ROW(2)
`LED_ROW(3)
`LED_ROW(4)
`LED_ROW(5)
`LED_ROW(6)
`LED_ROW(7)
`LED_ROW(8)
`endif
`ifdef DO_SWITCHES
SWITCH_PREP: begin
`SWROW1 = 1'b0;
`COL1 = 1'bZ;
`COL2 = 1'bZ;
`COL3 = 1'bZ;
`COL4 = 1'bZ;
`COL5 = 1'bZ;
`COL6 = 1'bZ;
`COL7 = 1'bZ;
`COL8 = 1'bZ;
`COL9 = 1'bZ;
`COL10 = 1'bZ;
`COL11 = 1'bZ;
`COL12 = 1'bZ;
end
SWITCH_ROW1: begin
`SWROW2 = 1'b0;
new_switch[1][1] = ~`COL1;
new_switch[1][2] = ~`COL2;
new_switch[1][3] = ~`COL3;
new_switch[1][4] = ~`COL4;
new_switch[1][5] = ~`COL5;
new_switch[1][6] = ~`COL6;
new_switch[1][7] = ~`COL7;
new_switch[1][8] = ~`COL8;
new_switch[1][9] = ~`COL9;
new_switch[1][10] = ~`COL10;
new_switch[1][11] = ~`COL11;
new_switch[1][12] = ~`COL12;
end
SWITCH_ROW2: begin
`SWROW3 = 1'b0;
new_switch[2][1] = ~`COL1;
new_switch[2][2] = ~`COL2;
new_switch[2][3] = ~`COL3;
new_switch[2][4] = ~`COL4;
new_switch[2][5] = ~`COL5;
new_switch[2][6] = ~`COL6;
new_switch[2][7] = ~`COL7;
new_switch[2][8] = ~`COL8;
new_switch[2][9] = ~`COL9;
new_switch[2][10] = ~`COL10;
new_switch[2][11] = ~`COL11;
new_switch[2][12] = ~`COL12;
end
SWITCH_ROW3: begin
new_switch[3][1] = ~`COL1;
new_switch[3][2] = ~`COL2;
new_switch[3][3] = ~`COL3;
new_switch[3][4] = ~`COL4;
new_switch[3][5] = ~`COL5;
new_switch[3][6] = ~`COL6;
new_switch[3][7] = ~`COL7;
new_switch[3][8] = ~`COL8;
new_switch[3][9] = ~`COL9;
new_switch[3][10] = ~`COL10;
new_switch[3][11] = ~`COL11;
new_switch[3][12] = ~`COL12;
end
`endif
endcase
if (state == state.last)
state = state.first;
else
state = state.next;
if (new_switch == switch_raw) begin
if (switch_debounce == 0)
switch = switch_raw;
else
--switch_debounce;
end else begin
switch_raw = new_switch;
switch_debounce = DEBOUNCE_MAX;
end
end
end
endmodule
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