repo2/mist/user_io.v @ 57
| 1 | markw | module user_io(
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input SPI_CLK,
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input SPI_SS_IO,
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output reg SPI_MISO,
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input SPI_MOSI,
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input [7:0] CORE_TYPE,
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output [5:0] JOY0,
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output [5:0] JOY1,
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output [127:0] KEYBOARD,
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output [1:0] BUTTONS,
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output [1:0] SWITCHES
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);
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reg [6:0] sbuf;
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reg [7:0] cmd;
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reg [7:0] cnt;
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reg [5:0] joystick0;
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reg [5:0] joystick1;
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reg [119:0] keyboard;
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reg [127:0] keyboard_out;
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reg [3:0] but_sw;
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assign JOY0 = joystick0;
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assign JOY1 = joystick1;
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assign KEYBOARD = keyboard_out;
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assign BUTTONS = but_sw[1:0];
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assign SWITCHES = but_sw[3:2];
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always@(negedge SPI_CLK) begin
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if(SPI_SS_IO == 1) begin
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SPI_MISO <= 1'bZ;
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end else begin
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if(cnt < 8) begin
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SPI_MISO <= CORE_TYPE[7-cnt];
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end else begin
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SPI_MISO <= 1'bZ;
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end
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end
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end
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always@(posedge SPI_CLK) begin
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if(SPI_SS_IO == 1) begin
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cnt <= 0;
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end else begin
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sbuf[6:1] <= sbuf[5:0];
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sbuf[0] <= SPI_MOSI;
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cnt <= cnt + 1;
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if(cnt == 7) begin
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cmd[7:1] <= sbuf;
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cmd[0] <= SPI_MOSI;
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end
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if(cnt == 15) begin
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if(cmd == 1) begin
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but_sw[3:1] <= sbuf[2:0];
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but_sw[0] <= SPI_MOSI;
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end
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if(cmd == 2) begin
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joystick0[5:1] <= sbuf[4:0];
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joystick0[0] <= SPI_MOSI;
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end
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if(cmd == 3) begin
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joystick1[5:1] <= sbuf[4:0];
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joystick1[0] <= SPI_MOSI;
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end
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end
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// 15,23,31,39,47,55,63,71
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if (cnt[2:0]==7) begin
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if(cmd == 5) begin
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if (!cnt[7]) begin
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keyboard[111:0] <= keyboard[119:8];
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keyboard[119:113] <= sbuf[6:0];
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keyboard[112] <= SPI_MOSI;
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end
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if (cnt[7]) begin
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keyboard_out[119:0] <= keyboard[119:0];
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keyboard_out[127:121] <= sbuf[6:0];
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keyboard_out[120] <= SPI_MOSI;
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end
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end
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end
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end
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end
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// always@(posedge clk2) begin
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// LED <= ~LED;
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// end
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endmodule
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