DE0_Nano.v

//=======================================================
//  This code is generated by Terasic System Builder
//=======================================================

module DE0_Nano(

	//////////// CLOCK //////////
	CLOCK_50,

	//////////// LED //////////
	LED,

	//////////// KEY //////////
	KEY,

	//////////// SW //////////
	SW,

	//////////// SDRAM //////////
	DRAM_ADDR,
	DRAM_BA,
	DRAM_CAS_N,
	DRAM_CKE,
	DRAM_CLK,
	DRAM_CS_N,
	DRAM_DQ,
	DRAM_DQM,
	DRAM_RAS_N,
	DRAM_WE_N,

	//////////// EPCS //////////
	EPCS_ASDO,
	EPCS_DATA0,
	EPCS_DCLK,
	EPCS_NCSO,

	//////////// Accelerometer and EEPROM //////////
	G_SENSOR_CS_N,
	G_SENSOR_INT,
	I2C_SCLK,
	I2C_SDAT,

	//////////// ADC //////////
	ADC_CS_N,
	ADC_SADDR,
	ADC_SCLK,
	ADC_SDAT,

	//////////// 2x13 GPIO Header //////////
	GPIO_2,
	GPIO_2_IN,

	//////////// GPIO_0, GPIO_0 connect to GPIO Default //////////
	GPIO_0,
	GPIO_0_IN,

	//////////// GPIO_1, GPIO_1 connect to GPIO Default //////////
	GPIO_1,
	GPIO_1_IN
);

//=======================================================
//  PARAMETER declarations
//=======================================================


//=======================================================
//  PORT declarations
//=======================================================

`define CLOCK
`define LED
`define KEY
`define SW
`define SDRAM
`define EPCS
`define AE
`define ADC
`define GPIOH
`define GPIO0
`define GPIO1


//////////// CLOCK //////////
//3.3-V LVTTL//
`ifdef CLOCK
input 		          		CLOCK_50;
`endif

//////////// LED //////////
//3.3-V LVTTL//
`ifdef LED
output		     [7:0]		LED;
`endif

//////////// KEY //////////
//3.3-V LVTTL//
`ifdef KEY
input 		     [1:0]		KEY;
`endif

//////////// SW //////////
//3.3-V LVTTL//
`ifdef SW
input 		     [3:0]		SW;
`endif

//////////// SDRAM //////////
//3.3-V LVTTL//
`ifdef SDRAM
output		    [12:0]		DRAM_ADDR;
output		     [1:0]		DRAM_BA;
output		          		DRAM_CAS_N;
output		          		DRAM_CKE;
output		          		DRAM_CLK;
output		          		DRAM_CS_N;
inout 		    [15:0]		DRAM_DQ;
output		     [1:0]		DRAM_DQM;
output		          		DRAM_RAS_N;
output		          		DRAM_WE_N;
`endif

//////////// EPCS //////////
//3.3-V LVTTL//
`ifdef EPCS
output		          		EPCS_ASDO;
input 		          		EPCS_DATA0;
output		          		EPCS_DCLK;
output		          		EPCS_NCSO;
`endif

//////////// Accelerometer and EEPROM //////////
//3.3-V LVTTL//
`ifdef AE
output		          		G_SENSOR_CS_N;
input 		          		G_SENSOR_INT;
output		          		I2C_SCLK;
inout 		          		I2C_SDAT;
`endif

//////////// ADC //////////
//3.3-V LVTTL//
`ifdef ADC
output		          		ADC_CS_N;
output		          		ADC_SADDR;
output		          		ADC_SCLK;
input 		          		ADC_SDAT;
`endif

//////////// 2x13 GPIO Header //////////
//3.3-V LVTTL//
`ifdef GPIOH
inout 		    [12:0]		GPIO_2;
input 		     [2:0]		GPIO_2_IN;
`endif

//////////// GPIO_0, GPIO_0 connect to GPIO Default //////////
//3.3-V LVTTL//
`ifdef GPIO0
inout 		    [33:0]		GPIO_0;
input 		     [1:0]		GPIO_0_IN;
`endif

//////////// GPIO_1, GPIO_1 connect to GPIO Default //////////
//3.3-V LVTTL//
`ifdef GPIO1
inout 		    [33:0]		GPIO_1;
input 		     [1:0]		GPIO_1_IN;
`endif

//=======================================================
//  REG/WIRE declarations
//=======================================================

wire DISP_I2C_SCL, DISP_I2C_SDA;
wire rst;

wire[7:0] i2c_reg_addr, i2c_tx_data;
wire tx_en, tx_done, i2c_err, full_screen_refreshed;
wire I2C_tx_clk;
wire sda_down;

wire[3:0] fsm_state;

wire[7:0] reg_addr;
wire[7:0] tx_data;

wire[7:0] i2c_reg_addr_static;
wire[7:0] i2c_tx_data_static;

wire[7:0] fb_data;
wire[7:0] fb_addr;

wire[3:0] action_btn;

wire[63:0] fb_write_data;
wire[6:0] fb_write_col_sel;
wire fb_write_en;

//=======================================================
//  Structural coding
//=======================================================

assign rst = ~KEY[0];

assign GPIO_0[24] = DISP_I2C_SCL;
assign GPIO_0[28] = ~sda_down;
assign GPIO_0[30] = full_screen_refreshed;

clk_div #(.DIVISION_RATE(32'h00000007)) div_inst(CLOCK_50, I2C_tx_clk);		//divide 50M clock for I2C

assign reg_addr = ~disp_init_complete ? i2c_reg_addr_static : fb_addr;	//set I2C transmitter register input
assign tx_data = ~disp_init_complete ? i2c_tx_data_static : fb_data;	//set I2C transmitter data input

i2c_transmitter transmitter(
	.rst(rst),
	.fast_clk(I2C_tx_clk), 

	.scl(DISP_I2C_SCL), 
	.sda(GPIO_0[26]), 

	.slave_addr(7'h3f),		//addr of ST7567S

	.reg_addr(reg_addr),
	.tx_data(tx_data), 

	.tx_en(tx_en), 

	.tx_done(tx_done), 
	.err(i2c_err),

	.fsm_state(fsm_state),

	.sda_down(sda_down)
);

i2c_data_static data_inst(
	.clk(I2C_tx_clk),
	.rst(rst),

	.reg_addr(i2c_reg_addr_static),
	.tx_data(i2c_tx_data_static),

	.tx_en(tx_en),
	.tx_done(tx_done),

	.init_complete(disp_init_complete)
);

frame_buffer fb_inst(
	.clk(I2C_tx_clk),
	.rst(rst),

	.fb_start(disp_init_complete),

	.tx_done(tx_done),

	.fb_data(fb_data),
	.fb_addr(fb_addr),

	.full_screen_refreshed(full_screen_refreshed),
	
	.fb_col_w_data(fb_write_data),
    .fb_col_sel(fb_write_col_sel),
    .fb_write(fb_write_en),
);

process game_inst(
	.clk(CLOCK_50),
	.rst(rst),

	.move_paddle_1({GPIO_1[33], GPIO_1[31]}),	
	.move_paddle_2({GPIO_1[29], GPIO_1[27]}),	

	.fb_col_w_data(fb_write_data),
    .fb_col_sel(fb_write_col_sel),
    .fb_write(fb_write_en),
);

endmodule