| Line 24... |
Line 24... |
localparam lcd_init_write_03_03 = 7;
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localparam lcd_init_write_03_03 = 7;
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localparam lcd_init_wait_40us = 8;
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localparam lcd_init_wait_40us = 8;
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localparam lcd_init_write_02 = 9;
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localparam lcd_init_write_02 = 9;
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localparam lcd_init_wait_50us = 10;
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localparam lcd_init_wait_50us = 10;
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localparam lcd_init_strobe = 11;
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localparam lcd_init_strobe = 11;
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reg [3:0] lcd_init_states, lcd_init_state_next;
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reg [3:0] lcd_init_states, lcd_init_state_next; // Declare two variables of 4 bits to hold the FSM states
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reg [19:0] counter_wait_lcd_init;
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reg [19:0] counter_wait_lcd_init;
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reg [3:0] counter_wait_strobe_lcd_init;
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reg [7:0] counter_wait_strobe_lcd_init;
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reg [19:0] time_wait_lcd_init;
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reg [19:0] time_wait_lcd_init;
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reg [3:0] lcd_init_data_out;
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reg [3:0] lcd_init_data_out; // FSM output LCD_DATA
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reg lcd_init_e_out;
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reg lcd_init_e_out; // FSM output LCD_E
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reg lcd_init_done;
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// States for FSM that send data to LCD
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localparam lcd_data_rst = 1;
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localparam lcd_data_wait = 2;
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localparam lcd_data_wr_nibble_high = 3;
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localparam lcd_data_wr_nibble_low = 4;
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localparam lcd_data_strobe = 5;
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reg [3:0] lcd_data_states, lcd_data_state_next; // Declare two variables of 4 bits to hold the FSM states
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reg [3:0] lcd_data_data_out; // FSM output LCD_DATA
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reg lcd_data_e_out; // FSM output LCD_E
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/*
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/*
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Initialize LCD...
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Initialize LCD...
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*/
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*/
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| Line 42... |
Line 53... |
if (rst) // Reset synchronous
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if (rst) // Reset synchronous
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begin
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begin
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lcd_init_states <= lcd_init_rst;
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lcd_init_states <= lcd_init_rst;
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counter_wait_lcd_init <= 0;
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counter_wait_lcd_init <= 0;
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counter_wait_strobe_lcd_init <= 0;
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counter_wait_strobe_lcd_init <= 0;
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lcd_init_e_out <= 0;
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lcd_init_done <= 0;
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end
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end
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else
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else
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begin
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begin
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case (lcd_init_states)
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case (lcd_init_states)
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lcd_init_rst:
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lcd_init_rst:
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| Line 131... |
Line 144... |
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lcd_init_wait_50us:
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lcd_init_wait_50us:
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begin
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begin
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time_wait_lcd_init <= 100000; // Wait for 100us
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time_wait_lcd_init <= 100000; // Wait for 100us
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lcd_init_states <= lcd_init_wait;
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lcd_init_states <= lcd_init_wait;
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lcd_init_state_next <= lcd_init_write_02;
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lcd_init_state_next <= lcd_init_wait_50us;
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lcd_init_done <= 1;
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end
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end
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endcase;
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endcase;
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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 lcd_e = lcd_init_e_out;
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assign lcd_e = lcd_init_e_out;
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assign lcd_nibble = lcd_init_data_out;
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assign lcd_nibble = lcd_init_data_out;
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/*
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FSM that deals to send data to the LCD (nibble High + nibble Low)
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*/
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always @ (posedge clk)
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begin
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if (~lcd_init_done)
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begin
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end
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end;
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endmodule
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endmodule
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