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190 lines
6.8 KiB
190 lines
6.8 KiB
5 years ago
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module matrix_kbd (input CLK, input RESET, input FREEZE, inout [3:0] ROWS, input [3:0] COLUMNS, output [63:0] kbd_report, output INT);
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// * - ESC (29), 7 - F1 (3A), 4 - F2 (3B), 1 - NUM_LOCK (53)
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// 0 - CAPS LOCK (39), 8 - R (15), 5 - BACKSPACE (2A), 2 - ENTER (58)
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// # - LSHIFT (E1), 9 - C (06), 6 - V (19), 3 - DELETE (4C)
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// D - LCTRL (E0), C - LALT (E2), B - SPACE (2C), A - RGUI (E7)
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parameter ONE_ROW_TIME = 12000;
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reg [15:0] row_time = 0;
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reg [1:0] row_counter;
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reg [15:0] last_data;
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reg [7:0] i;
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reg [63:0] report;
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reg [5:0] report_free_place;
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reg isr;
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reg [3:0] ROWS_EN = 0;
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reg [3:0] ROWS_OUT = 0;
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wire [3:0] ROWS_IN;
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reg [3:0] COLS_SHADOW;
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reg [7:0] kbd_code;
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reg is_pressed;
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always @ (negedge CLK) begin
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COLS_SHADOW <= COLUMNS;
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end
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always @ (posedge CLK) begin
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if (RESET == 0) begin
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last_data <= 16'hFFFF;
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report_free_place <= 6'h3F;
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report <= 63'h_00_00_00_00_00_00_00_00;
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end
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else begin
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if (FREEZE == 0) begin
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if (row_time == ONE_ROW_TIME) begin
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row_time <= 0;
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row_counter = row_counter + 1;
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ROWS_EN = 1 << row_counter;
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end
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else
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row_time <= row_time + 1;
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// ROW 0 - D, 1 - A, 2 - C, 3 - B
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if (row_time == (ONE_ROW_TIME/2 + 0)) begin
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if (COLS_SHADOW[0] != last_data[row_counter*4 + 0]) begin
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case (row_counter) 0: kbd_code = 8'h29; 1: kbd_code = 8'h53; 2: kbd_code = 8'h3A; 3: kbd_code = 8'h3B; // ESC, F1-F2, NUM LOCK
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default: kbd_code = 1;
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endcase
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if ((COLS_SHADOW[0] == 0) && (last_data[row_counter*4 + 0] == 1)) is_pressed = 1;
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else is_pressed = 0;
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end
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else kbd_code = 0;
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last_data[row_counter*4 + 0] <= COLS_SHADOW[0];
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end
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else if (row_time == (ONE_ROW_TIME/2 + 4)) begin
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if (COLS_SHADOW[2] != last_data[row_counter*4 + 2]) begin
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case (row_counter) 0: kbd_code = 8'h39; 1: kbd_code = 8'h58; 2: kbd_code = 8'h15; 3: kbd_code = 8'h2A; // CAPS LOCK, R, BACKSPACE, ENTER
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default: kbd_code = 1;
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endcase
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if ((COLS_SHADOW[2] == 0) && (last_data[row_counter*4 + 2] == 1)) is_pressed = 1;
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else is_pressed = 0;
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end
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else kbd_code = 0;
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last_data[row_counter*4 + 2] <= COLS_SHADOW[2];
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end
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else if (row_time == (ONE_ROW_TIME/2 + 2)) begin
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if (COLS_SHADOW[1] != last_data[row_counter*4 + 1]) begin
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case (row_counter) 0: kbd_code = 8'hE1; 1: kbd_code = 8'h4C; 2: kbd_code = 8'h06; 3: kbd_code = 8'h19; // LEFT SHIFT, C, V, DELETE
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default: kbd_code = 1;
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endcase
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if ((COLS_SHADOW[1] == 0) && (last_data[row_counter*4 + 1] == 1)) is_pressed = 1;
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else is_pressed = 0;
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end
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else kbd_code = 0;
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last_data[row_counter*4 + 1] <= COLS_SHADOW[1];
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end
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else if (row_time == (ONE_ROW_TIME/2 + 6)) begin
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if (COLS_SHADOW[3] != last_data[row_counter*4 + 3]) begin
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case (row_counter) 0: kbd_code = 8'hE0; 1: kbd_code = 8'hE7; 2: kbd_code = 8'hE2; 3: kbd_code = 8'h2C; // LCTRL, LALT, SPACE, RGUI
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default: kbd_code = 1;
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endcase
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if ((COLS_SHADOW[3] == 0) && (last_data[row_counter*4 + 3] == 1)) is_pressed = 1;
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else is_pressed = 0;
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end
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else kbd_code = 0;
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last_data[row_counter*4 + 3] <= COLS_SHADOW[3];
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end
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else
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kbd_code = 0;
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// START PACK I2C_HID REPORT
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if (kbd_code != 0) begin
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isr = 1;
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report[15:8] <= 0;
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//report[63:56] <= 0;
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if ((kbd_code > 8'hDF) && (kbd_code < 8'hE8)) begin
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kbd_code = kbd_code & 8'h07;
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if (is_pressed)
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report [7:0] <= report [7:0] | (1<<kbd_code);
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else
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report [7:0] <= report [7:0] & (~(1<<kbd_code));
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end
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else begin
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if (is_pressed) begin
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/*for (i = 0; i < 4; i = i + 1) begin
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if (report_free_place[i] == 1) begin
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report [ ((i + 2) * 8 + 7) : ((i + 2) * 8 + 0)] <= kbd_code;
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report_free_place[i] = 0;
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is_pressed = 0; // NO ERROR DETECTED
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end
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end
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if (report_free_place[0] == 1) begin
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report [ ((0 + 2) * 8 + 7) : ((0 + 2) * 8 + 0)] <= kbd_code;
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report_free_place[0] = 0;
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end*/
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if (report [ 23 : 16 ] == 0)
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report [ 23 : 16 ] <= kbd_code;
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else if (report [ 31 : 24 ] == 0)
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report [ 31 : 24 ] <= kbd_code;
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else if (report [ 39 : 32 ] == 0)
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report [ 39 : 32 ] <= kbd_code;
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else if (report [ 47 : 40 ] == 0)
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report [ 47 : 40 ] <= kbd_code;
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else if (report [ 55 : 48 ] == 0)
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report [ 55 : 48 ] <= kbd_code;
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else if (report [ 63 : 56 ] == 0)
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report [ 63 : 56 ] <= kbd_code;
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end
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else begin
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for (i = 0; i < 6; i = i + 1) begin
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if (report [ ((i + 2) * 8 + 7) : ((i + 2) * 8 + 0)] == kbd_code) begin
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report [ ((i + 2) * 8 + 7) : ((i + 2) * 8 + 0)] <= 0;
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//report_free_place[i] = 1;
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end
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end
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end
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//if (kbd_code == 8'h2C) begin
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//if (is_pressed)
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// report [15:8] <= kbd_code;
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//else
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// report [15:8] <= 0;
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//end
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//else if (kbd_code == 1) begin
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// if (is_pressed)
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// report [23:16] <= kbd_code;
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// else
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// report [23:16] <= 0;
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//end
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end
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end // END OF KBD CODE SEND ALG
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else
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isr <= 0;
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/*if (kbd_code != 0) begin
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if (is_pressed)
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report [7:0] <= kbd_code;
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else
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report [7:0] <= 0;
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end*/
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end
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end
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end
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assign kbd_report = report;
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assign INT = isr;
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//assign ROWS_EN = (1 << row_counter);
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SB_IO #(
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.PIN_TYPE(6'b 1010_01),
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.PULLUP(1'b 0)
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) rows_io [3:0] (
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.PACKAGE_PIN(ROWS),
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.OUTPUT_ENABLE(ROWS_EN),
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.D_OUT_0(ROWS_OUT),
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.D_IN_0(ROWS_IN)
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);
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endmodule
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