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C1) hange syntax of KEYCODE-parameter from SystemVerilog to Verilog. 2) Fix if-else problem

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Samuel Huang 2021-11-26 17:59:29 +08:00
parent 55edf9006f
commit e8ee999e8f
1 changed files with 56 additions and 55 deletions
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101
Keyboard Sample Code/SampleDisplay.v
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@ -9,31 +9,29 @@ module SampleDisplay(
parameter [8:0] LEFT_SHIFT_CODES = 9'b0_0001_0010;
parameter [8:0] RIGHT_SHIFT_CODES = 9'b0_0101_1001;
parameter [8:0] KEY_CODES [0:19] = {
9'b0_0100_0101, // 0 => 45
9'b0_0001_0110, // 1 => 16
9'b0_0001_1110, // 2 => 1E
9'b0_0010_0110, // 3 => 26
9'b0_0010_0101, // 4 => 25
9'b0_0010_1110, // 5 => 2E
9'b0_0011_0110, // 6 => 36
9'b0_0011_1101, // 7 => 3D
9'b0_0011_1110, // 8 => 3E
9'b0_0100_0110, // 9 => 46
parameter [8:0] KEY_CODES_00 = 9'b0_0100_0101; // 0 => 45
parameter [8:0] KEY_CODES_01 = 9'b0_0001_0110; // 1 => 16
parameter [8:0] KEY_CODES_02 = 9'b0_0001_1110; // 2 => 1E
parameter [8:0] KEY_CODES_03 = 9'b0_0010_0110; // 3 => 26
parameter [8:0] KEY_CODES_04 = 9'b0_0010_0101; // 4 => 25
parameter [8:0] KEY_CODES_05 = 9'b0_0010_1110; // 5 => 2E
parameter [8:0] KEY_CODES_06 = 9'b0_0011_0110; // 6 => 36
parameter [8:0] KEY_CODES_07 = 9'b0_0011_1101; // 7 => 3D
parameter [8:0] KEY_CODES_08 = 9'b0_0011_1110; // 8 => 3E
parameter [8:0] KEY_CODES_09 = 9'b0_0100_0110; // 9 => 46
9'b0_0111_0000, // right_0 => 70
9'b0_0110_1001, // right_1 => 69
9'b0_0111_0010, // right_2 => 72
9'b0_0111_1010, // right_3 => 7A
9'b0_0110_1011, // right_4 => 6B
9'b0_0111_0011, // right_5 => 73
9'b0_0111_0100, // right_6 => 74
9'b0_0110_1100, // right_7 => 6C
9'b0_0111_0101, // right_8 => 75
9'b0_0111_1101 // right_9 => 7D
};
parameter [8:0] KEY_CODES_10 = 9'b0_0111_0000; // right_0 => 70
parameter [8:0] KEY_CODES_11 = 9'b0_0110_1001; // right_1 => 69
parameter [8:0] KEY_CODES_12 = 9'b0_0111_0010; // right_2 => 72
parameter [8:0] KEY_CODES_13 = 9'b0_0111_1010; // right_3 => 7A
parameter [8:0] KEY_CODES_14 = 9'b0_0110_1011; // right_4 => 6B
parameter [8:0] KEY_CODES_15 = 9'b0_0111_0011; // right_5 => 73
parameter [8:0] KEY_CODES_16 = 9'b0_0111_0100; // right_6 => 74
parameter [8:0] KEY_CODES_17 = 9'b0_0110_1100; // right_7 => 6C
parameter [8:0] KEY_CODES_18 = 9'b0_0111_0101; // right_8 => 75
parameter [8:0] KEY_CODES_19 = 9'b0_0111_1101; // right_9 => 7D
reg [15:0] nums;
reg [15:0] nums, next_nums;
reg [3:0] key_num;
reg [9:0] last_key;
@ -66,41 +64,44 @@ module SampleDisplay(
if (rst) begin
nums <= 16'b0;
end else begin
nums <= nums;
nums <= next_nums;
end
end
always @ (*) begin
next_nums = nums;
if (been_ready && key_down[last_change] == 1'b1) begin
if (key_num != 4'b1111)begin
if (key_num != 4'b1111) begin
if (shift_down == 1'b1) begin
nums <= {key_num, nums[15:4]};
next_nums = {key_num, nums[15:4]};
end else begin
nums <= {nums[11:0], key_num};
end
end
end
next_nums = {nums[11:0], key_num};
end
end else next_nums = next_nums;
end else next_nums = next_nums;
end
always @ (*) begin
case (last_change)
KEY_CODES[00] : key_num = 4'b0000;
KEY_CODES[01] : key_num = 4'b0001;
KEY_CODES[02] : key_num = 4'b0010;
KEY_CODES[03] : key_num = 4'b0011;
KEY_CODES[04] : key_num = 4'b0100;
KEY_CODES[05] : key_num = 4'b0101;
KEY_CODES[06] : key_num = 4'b0110;
KEY_CODES[07] : key_num = 4'b0111;
KEY_CODES[08] : key_num = 4'b1000;
KEY_CODES[09] : key_num = 4'b1001;
KEY_CODES[10] : key_num = 4'b0000;
KEY_CODES[11] : key_num = 4'b0001;
KEY_CODES[12] : key_num = 4'b0010;
KEY_CODES[13] : key_num = 4'b0011;
KEY_CODES[14] : key_num = 4'b0100;
KEY_CODES[15] : key_num = 4'b0101;
KEY_CODES[16] : key_num = 4'b0110;
KEY_CODES[17] : key_num = 4'b0111;
KEY_CODES[18] : key_num = 4'b1000;
KEY_CODES[19] : key_num = 4'b1001;
KEY_CODES_00 : key_num = 4'b0000;
KEY_CODES_01 : key_num = 4'b0001;
KEY_CODES_02 : key_num = 4'b0010;
KEY_CODES_03 : key_num = 4'b0011;
KEY_CODES_04 : key_num = 4'b0100;
KEY_CODES_05 : key_num = 4'b0101;
KEY_CODES_06 : key_num = 4'b0110;
KEY_CODES_07 : key_num = 4'b0111;
KEY_CODES_08 : key_num = 4'b1000;
KEY_CODES_09 : key_num = 4'b1001;
KEY_CODES_10 : key_num = 4'b0000;
KEY_CODES_11 : key_num = 4'b0001;
KEY_CODES_12 : key_num = 4'b0010;
KEY_CODES_13 : key_num = 4'b0011;
KEY_CODES_14 : key_num = 4'b0100;
KEY_CODES_15 : key_num = 4'b0101;
KEY_CODES_16 : key_num = 4'b0110;
KEY_CODES_17 : key_num = 4'b0111;
KEY_CODES_18 : key_num = 4'b1000;
KEY_CODES_19 : key_num = 4'b1001;
default : key_num = 4'b1111;
endcase
end