mirror of
https://github.com/Gehstock/Mist_FPGA.git
synced 2026-01-23 02:37:52 +00:00
414 lines
12 KiB
Systemverilog
414 lines
12 KiB
Systemverilog
module LaserKeyboard(
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input wire CLK50MHZ,
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input wire [15:0] CPU_A,
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input wire RESET,
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input wire CASS_IN,
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input wire PS2_KBCLK,
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input wire PS2_KBDAT
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);
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// keyboard
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reg [4:0] KB_CLK;
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reg [16:0] RESET_KEY_COUNT;
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wire [7:0] SCAN;
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wire PRESS;
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wire PRESS_N;
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wire EXTENDED;
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reg BOOTROM_EN;
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reg [7:0] BOOTROM_BANK;
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reg AUTOSTARTROM_EN;
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reg [7:0] AUTOSTARTROM_BANK;
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reg [63:0] KEY;
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reg [9:0] KEY_EX;
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reg [11:0] KEY_Fxx;
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wire [7:0] KEY_DATA;
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//reg [63:0] LAST_KEY;
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//reg CAPS_CLK;
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//reg CAPS;
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wire A_KEY_PRESSED;
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reg [7:0] LATCHED_KEY_DATA;
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// emu keyboard
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wire [63:0] EMU_KEY;
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wire [9:0] EMU_KEY_EX;
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wire EMU_KEY_EN;
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// keyboard
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/*****************************************************************************
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* Convert PS/2 keyboard to ASCII keyboard
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******************************************************************************/
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/*
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KD5 KD4 KD3 KD2 KD1 KD0 扫描用地址
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A0 R Q E W T 68FEH 0
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A1 F A D CTRL S G 68FDH 8
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A2 V Z C SHFT X B 68FBH 16
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A3 4 1 3 2 5 68F7H 24
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A4 M 空格 ， . N 68EFH 32
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A5 7 0 8 - 9 6 68DFH 40
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A6 U P I RETN O Y 68BFH 48
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A7 J ； K : L H 687FH 56
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*/
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// 7: 0
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// 15: 8
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// 23:16
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// 31:24
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// 39:32
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// 47:40
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// 55:48
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// 63:56
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// 键盘检测的方法，就是循环地问每一行线发送低电平信号，也就是用该地址线为“0”的地址去读取数据。
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// 例如，检测第一行时，使A0为0，其余为1；加上选通IC4的高五位地址01101，成为01101***11111110B（A8~A10不起作用，
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// 可为任意值，故68FEH，69FEH，6AFEH，6BFEH，6CFEH，6DFEH，6EFEH，6FFEH均可）。
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// 读 6800H 判断是否有按键按下。
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// The method of keyboard detection is to cyclically ask each line to send a low level signal,
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// that is, to read the data with the address line "0".
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// For example, when detecting the first line, make A0 0 and the rest 1; plus the high five-bit address 01101 of the strobe IC4,
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// become 01101***11111110B (A8~A10 does not work,
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// It can be any value, so 68FEH, 69FEH, 6AFEH, 6BFEH, 6CFEH, 6DFEH, 6EFEH, 6FFEH can be).
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// Read 6800H to determine if there is a button press.
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// 键盘选通，整个竖列有一个选通的位置被按下，对应值为0。
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// The keyboard is strobed, and a strobe position is pressed in the entire vertical column, and the corresponding value is 0.
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// 键盘扩展
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// 加入方向键盘
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// Keyboard extension
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// left: ctrl M 37 KEY_EX[5]
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// right: ctrl , 35 KEY_EX[6]
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// up: ctrl . 33 KEY_EX[4]
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// down: ctrl space 36 KEY_EX[7]
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// esc: ctrl - 42 KEY_EX[3]
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// backspace: ctrl M 37 KEY_EX[8]
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// R-Shift
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wire [63:0] KEY_C = EMU_KEY_EN?EMU_KEY:KEY;
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wire [9:0] KEY_EX_C = EMU_KEY_EN?EMU_KEY_EX:KEY_EX;
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//wire KEY_CTRL_ULRD = (KEY_EX[7:4]==4'b1111);
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wire KEY_CTRL_ULRD_BRK = (KEY_EX[8:3]==6'b111111);
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wire KEY_DATA_BIT5 = (CPU_A[7:0]|{KEY_C[61], KEY_C[53], KEY_C[45], KEY_C[37]&KEY_EX_C[5]&KEY_EX_C[8], KEY_C[29], KEY_C[21], KEY_C[13], KEY_C[ 5]})==8'hff;
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wire KEY_DATA_BIT4 = (CPU_A[7:0]|{KEY_C[60], KEY_C[52], KEY_C[44], KEY_C[36]&KEY_EX_C[7], KEY_C[28], KEY_C[20], KEY_C[12], KEY_C[ 4]})==8'hff;
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wire KEY_DATA_BIT3 = (CPU_A[7:0]|{KEY_C[59], KEY_C[51], KEY_C[43], KEY_C[35]&KEY_EX_C[6], KEY_C[27], KEY_C[19], KEY_C[11], KEY_C[ 3]})==8'hff;
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wire KEY_DATA_BIT2 = (CPU_A[7:0]|{KEY_C[58], KEY_C[50], KEY_C[42]&KEY_EX_C[3], KEY_C[34], KEY_C[26], KEY_C[18]&KEY_EX_C[0], KEY_C[10]&KEY_CTRL_ULRD_BRK, KEY_C[ 2]})==8'hff;
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wire KEY_DATA_BIT1 = (CPU_A[7:0]|{KEY_C[57], KEY_C[49], KEY_C[41], KEY_C[33]&KEY_EX_C[4], KEY_C[25], KEY_C[17], KEY_C[ 9], KEY_C[ 1]})==8'hff;
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wire KEY_DATA_BIT0 = (CPU_A[7:0]|{KEY_C[56], KEY_C[48], KEY_C[40], KEY_C[32], KEY_C[24], KEY_C[16], KEY_C[ 8], KEY_C[ 0]})==8'hff;
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/*
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wire KEY_DATA_BIT5 = (CPU_A[7:0]|{KEY[61], KEY[53], KEY[45], KEY[37], KEY[29], KEY[21], KEY[13], KEY[ 5]})==8'hff;
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wire KEY_DATA_BIT4 = (CPU_A[7:0]|{KEY[60], KEY[52], KEY[44], KEY[36], KEY[28], KEY[20], KEY[12], KEY[ 4]})==8'hff;
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wire KEY_DATA_BIT3 = (CPU_A[7:0]|{KEY[59], KEY[51], KEY[43], KEY[35], KEY[27], KEY[19], KEY[11], KEY[ 3]})==8'hff;
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wire KEY_DATA_BIT2 = (CPU_A[7:0]|{KEY[58], KEY[50], KEY[42], KEY[34], KEY[26], KEY[18], KEY[10], KEY[ 2]})==8'hff;
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wire KEY_DATA_BIT1 = (CPU_A[7:0]|{KEY[57], KEY[49], KEY[41], KEY[33], KEY[25], KEY[17], KEY[ 9], KEY[ 1]})==8'hff;
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wire KEY_DATA_BIT0 = (CPU_A[7:0]|{KEY[56], KEY[48], KEY[40], KEY[32], KEY[24], KEY[16], KEY[ 8], KEY[ 0]})==8'hff;
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*/
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wire KEY_DATA_BIT7 = 1'b1; // 没有空置，具体用途没有理解
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//wire KEY_DATA_BIT6 = CASS_IN;
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wire KEY_DATA_BIT6 = ~CASS_IN;
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assign KEY_DATA = { KEY_DATA_BIT7, KEY_DATA_BIT6, KEY_DATA_BIT5, KEY_DATA_BIT4, KEY_DATA_BIT3, KEY_DATA_BIT2, KEY_DATA_BIT1, KEY_DATA_BIT0 };
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/*
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assign KEY_DATA = (CPU_A[0]==1'b0) ? KEY[ 7: 0] :
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(CPU_A[1]==1'b0) ? KEY[15: 8] :
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(CPU_A[2]==1'b0) ? KEY[23:16] :
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(CPU_A[3]==1'b0) ? KEY[31:24] :
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(CPU_A[4]==1'b0) ? KEY[39:32] :
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(CPU_A[5]==1'b0) ? KEY[47:40] :
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(CPU_A[6]==1'b0) ? KEY[55:48] :
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(CPU_A[7]==1'b0) ? KEY[63:56] :
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8'hff;
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assign KEY_DATA =
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(CPU_A[7]==1'b0) ? KEY[63:56] :
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(CPU_A[6]==1'b0) ? KEY[55:48] :
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(CPU_A[5]==1'b0) ? KEY[47:40] :
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(CPU_A[4]==1'b0) ? KEY[39:32] :
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(CPU_A[3]==1'b0) ? KEY[31:24] :
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(CPU_A[2]==1'b0) ? KEY[23:16] :
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(CPU_A[1]==1'b0) ? KEY[15: 8] :
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(CPU_A[0]==1'b0) ? KEY[ 7: 0] :
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8'hff;
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*/
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assign A_KEY_PRESSED = (KEY[63:0] == 64'hFFFFFFFFFFFFFFFF) ? 1'b0:1'b1;
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always @(posedge KB_CLK[3] or negedge RESET)
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begin
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if(~RESET)
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begin
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KEY <= 64'hFFFFFFFFFFFFFFFF;
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KEY_EX <= 10'h3FF;
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KEY_Fxx <= 12'h000;
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// CAPS_CLK <= 1'b0;
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RESET_KEY_COUNT <= 17'h1FFFF;
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BOOTROM_BANK <= 0;
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BOOTROM_EN <= 1'b0;
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AUTOSTARTROM_BANK <= 0;
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AUTOSTARTROM_EN <= 1'b0;
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end
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else
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begin
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//KEY[?] <= CAPS;
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if(RESET_KEY_COUNT[16]==1'b0)
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RESET_KEY_COUNT <= RESET_KEY_COUNT+1;
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case(SCAN)
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/*8'h07:
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begin
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KEY_Fxx[11] <= PRESS; // F12 RESET
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b0;
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BOOTROM_BANK <= 0;
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AUTOSTARTROM_EN <= 1'b0;
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AUTOSTARTROM_BANK <= 0;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h78: KEY_Fxx[10] <= PRESS; // F11
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8'h09: KEY_Fxx[ 9] <= PRESS; // F10 CASS STOP
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8'h01: KEY_Fxx[ 8] <= PRESS; // F9 CASS PLAY
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8'h0A:
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begin
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KEY_Fxx[ 7] <= PRESS; // F8 Ctrl or L-Shift BOOT 8
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 39;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 23;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h83:
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begin
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KEY_Fxx[ 6] <= PRESS; // F7 Ctrl or L-Shift BOOT 7
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 38;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 22;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h0B:
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begin
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KEY_Fxx[ 5] <= PRESS; // F6 Ctrl or L-Shift BOOT 6
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 37;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 21;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h03:
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begin
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KEY_Fxx[ 4] <= PRESS; // F5 Ctrl or L-Shift BOOT 5
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 36;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 20;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h0C:
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begin
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KEY_Fxx[ 3] <= PRESS; // F4 Ctrl or L-Shift BOOT 4
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 35;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 19;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h04:
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begin
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KEY_Fxx[ 2] <= PRESS; // F3 Ctrl or L-Shift BOOT 3
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 34;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 18;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h06:
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begin
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KEY_Fxx[ 1] <= PRESS; // F2 Ctrl or L-Shift BOOT 2
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 33;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 17;
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RESET_KEY_COUNT <= 17'h0;
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end
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end
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8'h05:
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begin
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KEY_Fxx[ 0] <= PRESS; // F1 Ctrl or L-Shift BOOT 1
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if(PRESS && (KEY[18]==PRESS_N))
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begin
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BOOTROM_EN <= 1'b1;
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BOOTROM_BANK <= 32;
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RESET_KEY_COUNT <= 17'h0;
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end
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else
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if(PRESS && (KEY[10]==PRESS_N))
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begin
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AUTOSTARTROM_EN <= 1'b1;
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AUTOSTARTROM_BANK <= 16;
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RESET_KEY_COUNT <= 17'h0;
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end
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end*/
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8'h16: KEY[28] <= PRESS_N; // 1 !
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8'h1E: KEY[25] <= PRESS_N; // 2 @
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8'h26: KEY[27] <= PRESS_N; // 3 #
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8'h25: KEY[29] <= PRESS_N; // 4 $
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8'h2E: KEY[24] <= PRESS_N; // 5 %
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8'h36: KEY[40] <= PRESS_N; // 6 ^
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8'h3D: KEY[45] <= PRESS_N; // 7 &
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// 8'h0D: KEY[?] <= PRESS_N; // TAB
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8'h3E: KEY[43] <= PRESS_N; // 8 *
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8'h46: KEY[41] <= PRESS_N; // 9 (
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8'h45: KEY[44] <= PRESS_N; // 0 )
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8'h4E: KEY[42] <= PRESS_N; // - _
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// 8'h55: KEY[?] <= PRESS_N; // = +
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8'h66: KEY_EX[8] <= PRESS_N; // backspace
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// 8'h0E: KEY[?] <= PRESS_N; // ` ~
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// 8'h5D: KEY[?] <= PRESS_N; // \ |
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8'h49: KEY[33] <= PRESS_N; // . >
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8'h4b: KEY[57] <= PRESS_N; // L
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8'h44: KEY[49] <= PRESS_N; // O
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// 8'h11 KEY[?] <= PRESS_N; // line feed (really right ALT (Extended) see below
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8'h5A: KEY[50] <= PRESS_N; // CR
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// 8'h54: KEY[?] <= PRESS_N; // [ {
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// 8'h5B: KEY[?] <= PRESS_N; // ] }
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8'h52: KEY[58] <= PRESS_N; // ' "
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8'h1D: KEY[ 1] <= PRESS_N; // W
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8'h24: KEY[ 3] <= PRESS_N; // E
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8'h2D: KEY[ 5] <= PRESS_N; // R
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8'h2C: KEY[ 0] <= PRESS_N; // T
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8'h35: KEY[48] <= PRESS_N; // Y
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8'h3C: KEY[53] <= PRESS_N; // U
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8'h43: KEY[51] <= PRESS_N; // I
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8'h1B: KEY[ 9] <= PRESS_N; // S
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8'h23: KEY[11] <= PRESS_N; // D
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8'h2B: KEY[13] <= PRESS_N; // F
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8'h34: KEY[ 8] <= PRESS_N; // G
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8'h33: KEY[56] <= PRESS_N; // H
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8'h3B: KEY[61] <= PRESS_N; // J
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8'h42: KEY[59] <= PRESS_N; // K
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8'h22: KEY[17] <= PRESS_N; // X
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8'h21: KEY[19] <= PRESS_N; // C
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8'h2a: KEY[21] <= PRESS_N; // V
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8'h32: KEY[16] <= PRESS_N; // B
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8'h31: KEY[32] <= PRESS_N; // N
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8'h3a: KEY[37] <= PRESS_N; // M
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8'h41: KEY[35] <= PRESS_N; // , <
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8'h15: KEY[ 4] <= PRESS_N; // Q
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8'h1C: KEY[12] <= PRESS_N; // A
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8'h1A: KEY[20] <= PRESS_N; // Z
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8'h29: KEY[36] <= PRESS_N; // Space
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// 8'h4A: KEY[?] <= PRESS_N; // / ?
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8'h4C: KEY[60] <= PRESS_N; // ; :
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8'h4D: KEY[52] <= PRESS_N; // P
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8'h14: KEY[10] <= PRESS_N; // Ctrl either left or right
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8'h12: KEY[18] <= PRESS_N; // L-Shift
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8'h59: KEY_EX[0] <= PRESS_N; // R-Shift
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8'h11:
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begin
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if(~EXTENDED)
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KEY_EX[1] <= PRESS_N; // Repeat really left ALT
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else
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KEY_EX[2] <= PRESS_N; // LF really right ALT
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end
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8'h76: KEY_EX[3] <= PRESS_N; // Esc
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8'h75: KEY_EX[4] <= PRESS_N; // up
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8'h6B: KEY_EX[5] <= PRESS_N; // left
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8'h74: KEY_EX[6] <= PRESS_N; // right
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8'h72: KEY_EX[7] <= PRESS_N; // down
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endcase
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end
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end
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always @ (posedge CLK50MHZ) // 50MHz
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KB_CLK <= KB_CLK + 1'b1; // 50/32 = 1.5625 MHz
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ps2_keyboard KEYBOARD(
|
||
.RESET_N(~RESET),
|
||
.CLK(KB_CLK[4]),
|
||
.PS2_CLK(PS2_KBCLK),
|
||
.PS2_DATA(PS2_KBDAT),
|
||
.RX_SCAN(SCAN),
|
||
.RX_PRESSED(PRESS),
|
||
.RX_EXTENDED(EXTENDED)
|
||
);
|
||
|
||
assign PRESS_N = ~PRESS;
|
||
|
||
|
||
endmodule
|