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187 lines
7.5 KiB
187 lines
7.5 KiB
6 years ago
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module top (input CLK, output LED1, LED2, LED3, LED4, LED5,
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input SCL, inout SDA, /*output ACK,*/ output INTERRUPT,
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input COM_RX, output COM_TX, COM_DCD, COM_DSR, COM_RTS,
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input [3:0] KBD_COLUMNS, inout [3:0] KBD_ROWS);
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//reg [7:0] I2C_TX; // TRANSMITTED TO MASTER
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wire [7:0] I2C_TX;
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reg [7:0] I2C_TX_DESC;
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reg [7:0] I2C_TX_REPORT;
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assign I2C_TX = (I2C_TX_DESC & I2C_OUT_DESC_MASK) | (I2C_TX_REPORT & (~I2C_OUT_DESC_MASK));
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wire [7:0] I2C_RX; // RECEIVED FROM MASTER
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wire I2C_TRANS, I2C_READ, I2C_ACK, I2C_ACK_MSTR_CTRL, I2C_WR;
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wire [9:0] I2C_COUNTER;
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i2c_slave I2C (CLK, RESET, SCL, SDA, I2C_TRANS, I2C_READ, I2C_ACK, I2C_WR, //I2C_ACK_MSTR_CTRL,
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I2C_RX, I2C_TX, I2C_COUNTER);
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reg UART_WR, UART_DTR, UART_RTS, UART_DCD;
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reg [7:0] UART_TX_DATA;
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wire UART_ACTIVE, UART_TX_LINE;
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initial begin
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UART_WR = 0; UART_RTS = 1; UART_DTR = 0; UART_DCD = 0;
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end
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uart UART (CLK, RESET, UART_WR, UART_TX_DATA, UART_ACTIVE, UART_TX_LINE);
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wire [63:0] kbd_report;
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wire ISR;
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reg INT = 1; // INTERRUPT LINE TO HOST
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reg KBD_FREEZE = 1; // LOGIC REG FOR BLOCK KBD ACTIVITY WHEN I2C IS WORKING
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reg IS_EMPTY_REPORT = 0; // REGISTER FOR CORRECT START (HOST MUST REQUEST EMPTY REGISTER AFTER INTERRUPT. THEN INTERRRUPT SET TO 1)
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matrix_kbd KEYBOARD (CLK, RESET, KBD_FREEZE, KBD_ROWS, KBD_COLUMNS, kbd_report, ISR);
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descriptors I2C_HID_DESC (CLK, RESET, I2C_WR, I2C_OUTPUT_TYPE[1:0], I2C_COUNTER, I2C_TX_DESC/*, kbd_report*/);
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parameter MAX_INPUT_LEN = 10;
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reg [7:0] I2C_INPUT_DATA [MAX_INPUT_LEN:0];
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reg [7:0] I2C_INPUT_LEN = 0;
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reg [2:0] I2C_OUTPUT_TYPE = 0; // 0 - ALL ZERO DATA, 1 - I2C HID DESCR, 2 - OUTPUT REPORT, 3 - HID REPORT DESCR
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reg [7:0] I2C_OUT_DESC_MASK = 0;
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reg [7:0] KBD_LED_STATUS = 0;
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reg last_wr = 0, last_trans = 0, last_uart_active = 0, last_isr = 0, uart_double_ff = 0;
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wire RESET;
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reg [3:0] rststate = 0;
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assign RESET = &rststate;
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always @(posedge CLK) begin
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rststate <= rststate + !RESET;
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if (RESET == 0) begin
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I2C_OUTPUT_TYPE = 0;
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I2C_OUT_DESC_MASK = 0;
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KBD_LED_STATUS = 0; // BIT 0 - NUM LOCK, BIT 1 - CAPS LOCK, BIT 2 - SCROOL LOCK
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I2C_INPUT_LEN = 0;
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INT = 0;
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UART_WR = 0;
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KBD_FREEZE = 1;
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IS_EMPTY_REPORT = 0;
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end
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else begin
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if ((last_wr == 0) && (I2C_WR == 1)) begin
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I2C_INPUT_LEN <= I2C_COUNTER - 1;
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if (I2C_READ == 0) begin
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if (I2C_COUNTER < (MAX_INPUT_LEN + 2))
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I2C_INPUT_DATA[I2C_COUNTER - 2] <= I2C_RX;
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end
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else begin
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if (I2C_OUTPUT_TYPE == 3) begin
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if ((I2C_COUNTER < 2) || (I2C_COUNTER > (2 + 10 - 1)))
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I2C_TX_REPORT <= 0;
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else if (I2C_COUNTER == 2)
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I2C_TX_REPORT <= 10;
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else if (I2C_COUNTER == 3)
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I2C_TX_REPORT <= 0;
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else
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I2C_TX_REPORT <= kbd_report[ (8 * (I2C_COUNTER - 4) + 7) : (8 * (I2C_COUNTER - 4) + 0) ];
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end
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else
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I2C_TX_REPORT <= 0;
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end
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end
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else if ((last_wr == 1) && (I2C_WR == 0)) begin
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UART_WR <= 1;
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if (I2C_READ == 0)
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UART_TX_DATA <= I2C_RX;
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else
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UART_TX_DATA <= I2C_TX;
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end
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else if ((last_trans == 0) && (I2C_TRANS == 1)) begin
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UART_TX_DATA = 8'hFF;
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UART_WR = 1;
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uart_double_ff = 1;
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KBD_FREEZE = 0;
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end
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else if ((last_trans == 1) && (I2C_TRANS == 0)) begin
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if (I2C_READ == 0) begin // DECODING PACKET RECEIVED FROM HOST
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if (I2C_INPUT_LEN == 0)
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KBD_FREEZE <= 0;
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else if (I2C_INPUT_LEN == 2) begin
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if ((I2C_INPUT_DATA[0] == 1) && (I2C_INPUT_DATA[1] == 0)) // I2C_HID_DESC_REQUEST
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I2C_OUTPUT_TYPE = 1;
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else if ((I2C_INPUT_DATA[0] == 2) && (I2C_INPUT_DATA[1] == 0)) // HID REPORT DESC REQUEST
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I2C_OUTPUT_TYPE = 2;
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else if ((I2C_INPUT_DATA[0] == 3) && (I2C_INPUT_DATA[1] == 0)) // INPUT REPORT REQUEST (ADR)
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I2C_OUTPUT_TYPE = 3;
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//else
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// I2C_OUTPUT_TYPE = 0; //
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end
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else if (I2C_INPUT_LEN == 5) begin // OUTPUT REPORT SET (LEDS) - WRITE TO OUT ADR
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if ((I2C_INPUT_DATA[0] == 4) && (I2C_INPUT_DATA[1] == 0) && (I2C_INPUT_DATA[2] == 1) && (I2C_INPUT_DATA[3] == 0)) begin
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KBD_LED_STATUS <= I2C_INPUT_DATA[4];
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KBD_FREEZE <= 0;
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end
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//else
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// I2C_OUTPUT_TYPE = 0; //
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end
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else if (I2C_INPUT_LEN == 6) begin // INPUT REPORT REQUEST (KBD PRESS INFO)
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if ((I2C_INPUT_DATA[0] == 5) && (I2C_INPUT_DATA[1] == 0) && (I2C_INPUT_DATA[2] == 16) && (I2C_INPUT_DATA[3] == 2) && (I2C_INPUT_DATA[4] == 6) && (I2C_INPUT_DATA[5] == 0))
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I2C_OUTPUT_TYPE = 3;
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//else
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// I2C_OUTPUT_TYPE = 0; //
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end
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else if (I2C_INPUT_LEN == 9) begin // OUTPUT REPORT SET (LEDS) - WRITE BY CMD
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if ((I2C_INPUT_DATA[0] == 5) && (I2C_INPUT_DATA[1] == 0) && (I2C_INPUT_DATA[2] == 32) && (I2C_INPUT_DATA[3] == 3) && (I2C_INPUT_DATA[4] == 6) && (I2C_INPUT_DATA[5] == 0) /*&& (I2C_INPUT_DATA[6] == 1) && (I2C_INPUT_DATA[7] == 0)*/) begin
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KBD_LED_STATUS <= I2C_INPUT_DATA[8];
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KBD_FREEZE <= 0;
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end
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//else
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// I2C_OUTPUT_TYPE = 0; //
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end
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else if (I2C_INPUT_LEN == 4) begin
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if ((I2C_INPUT_DATA[0] == 5) && (I2C_INPUT_DATA[1] == 0) && (I2C_INPUT_DATA[2] == 0) && (I2C_INPUT_DATA[3] == 1))
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rststate <= 4'h0; // RESET COMMAND
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end
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//else
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// I2C_OUTPUT_TYPE = 0; //
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if ((I2C_OUTPUT_TYPE == 1) || (I2C_OUTPUT_TYPE == 2))
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I2C_OUT_DESC_MASK = 8'hFF;
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else
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I2C_OUT_DESC_MASK = 8'h00;
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end // END OF I2C_READ == 0
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else begin
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KBD_FREEZE <= 0; // UNFREEZING KBD AFTER ANYONE I2C RECEIVING
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//if (((I2C_OUTPUT_TYPE == 3) && (I2C_INPUT_LEN == 10)) || ((I2C_OUTPUT_TYPE == 0) && (I2C_INPUT_LEN > 1))) begin // HARD
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if (((I2C_OUTPUT_TYPE == 3) || (I2C_OUTPUT_TYPE == 0)) && (I2C_INPUT_LEN > 1)) begin // SOFT
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// DEACTIVATING INTERRRUPT IF HOST READ INPUT REPORT (LEN 10) AFTER INTERRUPT OR EMPTY DATA (>=2 BYTES) AFTER RESET
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// AND UNFREEZING KEYBOARD
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INT <= 1;
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//KBD_FREEZE <= 0;
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IS_EMPTY_REPORT = 1;
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end
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end
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end
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else if ((last_uart_active == 1) && (UART_ACTIVE == 0) && (uart_double_ff == 1)) begin
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UART_WR = 1;
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UART_TX_DATA = 8'hFF;
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uart_double_ff = 0;
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I2C_INPUT_LEN = 0;
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end
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else if (UART_WR == 1)
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UART_WR <= 0;
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else if ((last_isr == 0) && (ISR == 1) && (INT == 1)) begin
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INT = 0;
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I2C_OUTPUT_TYPE = 3;
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I2C_OUT_DESC_MASK = 8'h00;
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end
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last_wr <= I2C_WR;
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last_trans <= I2C_TRANS;
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last_uart_active <= UART_ACTIVE;
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last_isr <= ISR;
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end
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end
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assign LED5 = I2C_TRANS;
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//assign LED5 = COM_RX;
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assign LED1 = INT ^ 1;//KBD_COLUMNS[0];//I2C_OUTPUT_TYPE[0];//I2C_RX[0];
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assign LED2 = KBD_LED_STATUS[0];//I2C_OUTPUT_TYPE[0];
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assign LED3 = KBD_LED_STATUS[1];//I2C_OUTPUT_TYPE[1];
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assign LED4 = KBD_LED_STATUS[2];//KBD_FREEZE;//UART_ACTIVE;
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//assign ACK = I2C_READ;//I2C_WR; //I2C_ACK;
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assign COM_TX = UART_TX_LINE;//COM_RX;
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assign INTERRUPT = INT;
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assign COM_RTS = I2C_READ;//UART_RTS;
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assign COM_DSR = KBD_FREEZE;//UART_DTR;
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assign COM_DCD = INT;
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endmodule //top
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