module camera_init (
	input 	wire 	clk,
	input 	wire 	reset_n,
	output 	reg 	ready,
	output 	wire 	sda_oe,
	output 	wire 	sda,
	input 	wire 	sda_in,
	output 	wire 	scl
);

parameter  REGS_TO_INIT 	 = 178;

localparam CAMERA_INIT_1 	 = 11;
localparam CAMERA_INIT_2     = 12;
localparam CAMERA_INIT_3 	 = 13;
localparam CAMERA_INIT_4 	 = 14;
localparam CAMERA_INIT_5 	 = 15;
localparam CAMERA_INIT_6 	 = 16;
localparam CAMERA_INIT_7 	 = 17;
localparam CAMERA_IDLE   	 = 18;

localparam CONTROL_REG       = 3'b000;
localparam SLAVE_ADDRESS     = 3'b001;
localparam SLAVE_REG_ADDRESS = 3'b010;
localparam SLAVE_DATA_1      = 3'b011;
localparam SLAVE_DATA_2      = 3'b100;

//sccb//////////////////////////////////////////
reg	[7:0] 	data_in_bus = 0;
reg [2:0] 	reg_address = 0;
reg 		bus_write   = 0;
wire 		ready_out;
wire 		success_out;

i2c_module u_i2c_write( 
	.clk		(clk		), 
	.reset_n	(reset_n	), 
	.scl_out	(scl		), 
	.writedata	(data_in_bus),
	.address	(reg_address),
	.write		(bus_write	), 
	.ready		(ready_out	), 
	.success_out(success_out), 
	.sda_in		(sda_in		), 
	.sda		(sda		), 
	.sda_oe		(sda_oe		) 
);
wire [7:0] regs_addr;
wire [7:0] data_to_write;
reg	 [7:0] counter = 0;
reg	 [7:0] cnt     =0;

reg  [7:0] state_next;
reg  [8:0] divider2 = 0; 

always@(posedge clk)
begin
	divider2 <= divider2 + 8'b1;
end

assign clk_div = divider2[8];

wire [15:0] regs_data = 
	counter == 0   ? 16'hff_01 :
	counter == 1   ? 16'h12_80 :
//	need 5ms of delay
	counter == 2   ? 16'hff_00 :
	counter == 3   ? 16'h2c_ff :
	counter == 4   ? 16'h2e_df :
	//
	counter == 5   ? 16'hff_01 :
	counter == 6   ? 16'h3c_32 :                
	counter == 7   ? 16'h11_00 :
	counter == 8   ? 16'h09_02 :
	
	counter == 9   ? 16'h04_28 ://D8水平镜像,垂直翻转    28
	counter == 10  ? 16'h13_e5 :
	counter == 11  ? 16'h14_48 :
	counter == 12  ? 16'h2c_0c :
	counter == 13  ? 16'h33_78 :
	counter == 14  ? 16'h3a_33 :
	counter == 15  ? 16'h3b_fB :
	               
	counter == 16  ? 16'h3e_00 :
	counter == 17  ? 16'h43_11 :
	counter == 18  ? 16'h16_10 :  
	             
	counter == 19  ? 16'h39_92 : 
	              
	counter == 20  ? 16'h35_da :
	counter == 21  ? 16'h22_1a :
	counter == 22  ? 16'h37_c3 :
	counter == 23  ? 16'h23_00 :
	counter == 24  ? 16'h34_c0 :
	counter == 25  ? 16'h36_1a :
	counter == 26  ? 16'h06_88 :
	counter == 27  ? 16'h07_c0 :
	counter == 28  ? 16'h0d_87 :
	counter == 29  ? 16'h0e_41 :
	counter == 30  ? 16'h4c_00 :
	counter == 31  ? 16'h48_00 :
	counter == 32  ? 16'h5B_00 :
	counter == 33  ? 16'h42_03 :  
	              
	counter == 34  ? 16'h4a_81 :
	counter == 35  ? 16'h21_99 : 
	                
	counter == 36  ? 16'h24_40 :
	counter == 37  ? 16'h25_38 :
	counter == 38  ? 16'h26_82 :
	counter == 39  ? 16'h5c_00 :
	counter == 40  ? 16'h63_00 :
	counter == 41  ? 16'h46_22 :
	counter == 42  ? 16'h0c_3c : 
	                
	counter == 43  ? 16'h61_70 :
	counter == 44  ? 16'h62_80 :
	counter == 45  ? 16'h7c_05 : 
	               
	counter == 46  ? 16'h20_80 :
	counter == 47  ? 16'h28_30 :
	counter == 48  ? 16'h6c_00 :
	counter == 49  ? 16'h6d_80 :
	counter == 50  ? 16'h6e_00 :
	counter == 51  ? 16'h70_02 :
	counter == 52  ? 16'h71_94 :
	counter == 53  ? 16'h73_c1 : 
	
	//counter == 54  ? 16'h3d_34 :
	//counter == 55  ? 16'h5a_57 :
	      
	counter == 54  ? 16'h12_40 :
	counter == 55  ? 16'h17_11 :
	counter == 56  ? 16'h18_43 :
	counter == 57  ? 16'h19_00 :
	counter == 58  ? 16'h1a_4b :
	counter == 59  ? 16'h32_09 :
	counter == 60  ? 16'h37_c0 :
	
	counter == 61  ? 16'h4f_ca :
	counter == 62  ? 16'h50_a8 :
	counter == 63  ? 16'h5a_23 :
	counter == 64  ? 16'h6d_00 :
	counter == 65  ? 16'h3d_38 :
	//
	counter == 66  ? 16'hff_00 :
	counter == 67  ? 16'he5_7f :
	counter == 68  ? 16'hf9_c0 :
	counter == 69  ? 16'h41_24 :
	counter == 70  ? 16'he0_14 :
	counter == 71  ? 16'h76_ff :
	counter == 72  ? 16'h33_a0 :
	counter == 73  ? 16'h42_20 :
	counter == 74  ? 16'h43_18 :
	counter == 75  ? 16'h4c_00 :
	counter == 76  ? 16'h87_d5 :
	counter == 77  ? 16'h88_3f :
	counter == 78  ? 16'hd7_03 :
	counter == 79  ? 16'hd9_10 :
	counter == 80  ? 16'hd3_82 :
	
	counter == 81  ? 16'hc8_08 :
	counter == 82  ? 16'hc9_80 :
	
	counter == 83  ? 16'h7c_00 :
	counter == 84  ? 16'h7d_00 :
	counter == 85  ? 16'h7c_03 :
	counter == 86  ? 16'h7d_48 :
	counter == 87  ? 16'h7d_48 :
	
	counter == 88  ? 16'h7c_08 :
	counter == 89  ? 16'h7d_20 :
	counter == 90  ? 16'h7d_10 :
	counter == 91  ? 16'h7d_0e :
	
	counter == 92  ? 16'h90_00 :
	counter == 93  ? 16'h91_0e :
	counter == 94  ? 16'h91_1a :
	counter == 95  ? 16'h91_31 :
	counter == 96  ? 16'h91_5a :
	counter == 97  ? 16'h91_69 :
	counter == 98  ? 16'h91_75 :
	counter == 99  ? 16'h91_7e :
	counter == 100 ? 16'h91_88 :
	counter == 101 ? 16'h91_8f :
	counter == 102 ? 16'h91_96 :
	counter == 103 ? 16'h91_a3 :
	counter == 104 ? 16'h91_af :
	counter == 105 ? 16'h91_c4 :
	counter == 106 ? 16'h91_d7 :
	counter == 107 ? 16'h91_e8 :
	counter == 108 ? 16'h91_20 :
	
	counter == 109 ? 16'h92_00 :
	counter == 110 ? 16'h93_06 :
	counter == 111 ? 16'h93_e3 :
	counter == 112 ? 16'h93_05 :
	counter == 113 ? 16'h93_05 :
	counter == 114 ? 16'h93_00 :
	counter == 115 ? 16'h93_04 :
	counter == 116 ? 16'h93_00 :
	counter == 117 ? 16'h93_00 :
	counter == 118 ? 16'h93_00 :
	counter == 119 ? 16'h93_00 :
	counter == 120 ? 16'h93_00 :
	counter == 121 ? 16'h93_00 :
	counter == 122 ? 16'h93_00 :
	
	counter == 123 ? 16'h96_00 :
	counter == 124 ? 16'h97_08 :
	counter == 125 ? 16'h97_19 :
	counter == 126 ? 16'h97_02 :
	counter == 127 ? 16'h97_0c :
	counter == 128 ? 16'h97_24 :
	counter == 129 ? 16'h97_30 :
	counter == 130 ? 16'h97_28 :
	counter == 131 ? 16'h97_26 :
	counter == 132 ? 16'h97_02 :
	counter == 133 ? 16'h97_98 :
	counter == 134 ? 16'h97_80 :
	counter == 135 ? 16'h97_00 :
	counter == 136 ? 16'h97_00 :
	
	counter == 137 ? 16'hc3_ed :
	counter == 138 ? 16'ha4_00 :
	counter == 139 ? 16'ha8_00 :
	counter == 140 ? 16'hc5_11 :
	counter == 141 ? 16'hc6_51 :
	counter == 142 ? 16'hbf_80 ://
	counter == 143 ? 16'hc7_10 ://10  白平衡自动
	counter == 144 ? 16'hb6_66 :
	counter == 145 ? 16'hb8_A5 :
	counter == 146 ? 16'hb7_64 :
	counter == 147 ? 16'hb9_7C :
	counter == 148 ? 16'hb3_af :
	counter == 149 ? 16'hb4_97 :
	counter == 150 ? 16'hb5_FF :
	counter == 151 ? 16'hb0_C5 :
	counter == 152 ? 16'hb1_94 :
	counter == 153 ? 16'hb2_0f :
	counter == 154 ? 16'hc4_5c :
	
	counter == 155 ? 16'hc0_64 :
	counter == 156 ? 16'hc1_4B :
	counter == 157 ? 16'h8c_00 :
	counter == 158 ? 16'h86_3D :
	counter == 159 ? 16'h50_00 :
	counter == 160 ? 16'h51_C8 ://C8    
	counter == 161 ? 16'h52_96 ://96    
	counter == 162 ? 16'h53_00 :
	counter == 163 ? 16'h54_00 :
	counter == 164 ? 16'h55_00 :
	counter == 165 ? 16'h5a_32 ://32    50*4=200
	counter == 166 ? 16'h5b_29 ://29	41*4=164
	counter == 167 ? 16'h5c_00 :
	
	counter == 168 ? 16'hd3_82 ://82
	counter == 169 ? 16'hc3_ed :
	counter == 170 ? 16'h7f_00 :
	
	counter == 171 ? 16'hda_09 ://08是高位数据先出
	
	counter == 172 ? 16'hc2_0e :
	
	counter == 173 ? 16'he5_1f :
	counter == 174 ? 16'he1_67 :
	counter == 175 ? 16'he0_00 :
	counter == 176 ? 16'hdd_7f :
	counter == 177 ? 16'h05_00 :
	16'hFF;

								
always@(posedge clk)
begin
	if(state_next == CAMERA_IDLE)
		ready <= 1'b1;
	else
		ready <= 1'b0;
end

always@(posedge clk_div or negedge reset_n)
begin
	if(reset_n == 1'b0)
	begin
		state_next <= CAMERA_INIT_1;	
	end
	else
	begin
		case(state_next)
			
			CAMERA_INIT_1:state_next <= CAMERA_INIT_2;					
			CAMERA_INIT_2:state_next <= CAMERA_INIT_3;
			CAMERA_INIT_3:state_next <= CAMERA_INIT_4;				
			CAMERA_INIT_4:state_next <= CAMERA_INIT_7;
			CAMERA_INIT_7://wait until ready_out is set to 0
			begin
				if(ready_out == 1'b0)
					state_next <= CAMERA_INIT_5;
			end				
			CAMERA_INIT_5:
			begin
				if(ready_out == 1'b1)
				begin
					if(success_out == 1'b1)
					begin
						if(counter == REGS_TO_INIT - 1)
						begin
							if(cnt == 8'h4)
							begin
								state_next <= CAMERA_IDLE;
							end
							else
								state_next <= CAMERA_INIT_1;
						end
						else
						state_next <= CAMERA_INIT_6;
					end
					else
					state_next <= CAMERA_INIT_2;
				end	
			end				
			CAMERA_INIT_6:state_next <= CAMERA_INIT_2;			
			CAMERA_IDLE:  state_next <= CAMERA_IDLE;				
		endcase
	end
end


always@(posedge clk_div or negedge reset_n)
begin
	if(reset_n == 1'b0)
	begin
		reg_address <= 0;
		data_in_bus <= 0;
		bus_write 	<= 1'b0;
		counter 	<= 0;
	end
	else
	begin
		case(state_next)
			CAMERA_INIT_1:
			begin
				reg_address <= SLAVE_ADDRESS;
				data_in_bus <= 8'h60; // slave address
				bus_write 	<= 1'b1;
			end			
			CAMERA_INIT_2:
			begin
				reg_address <= SLAVE_REG_ADDRESS;
				data_in_bus <= regs_data[15:8];
				bus_write 	<= 1'b1;	
			end			
			CAMERA_INIT_3:
			begin
				reg_address <= SLAVE_DATA_1;
				data_in_bus <= regs_data[7:0];
				bus_write 	<= 1'b1;			
			end				
			CAMERA_INIT_4:
			begin
				reg_address <= CONTROL_REG;
				data_in_bus <= 3'b001;
				bus_write 	<= 1'b1;
			end			
			CAMERA_INIT_5:
			begin
				reg_address <= 0;
				data_in_bus <= 0;
				bus_write 	<= 1'b0;
			end				
			CAMERA_INIT_6:
			begin
				bus_write 	<= 1'b0;
				reg_address <= 0;
				data_in_bus <= 0;
				if(counter == REGS_TO_INIT - 1)
				begin
					cnt 	<= cnt+1'b1;
					counter <= 8'h3;
				end
				else
					counter <= counter + 1'b1;
			end				
			CAMERA_INIT_7:
			begin
				reg_address <= 0;
				data_in_bus <= 0;
				bus_write 	<= 1'b0;
			end				
			CAMERA_IDLE:
			begin
				reg_address <= 0;
				data_in_bus <= 0;
				bus_write 	<= 1'b0;
			end				
			default:
			begin
				bus_write 	<= 1'b0;
				reg_address <= 3'd0;
				data_in_bus <= 8'd0;
			end
		endcase
	end
end

endmodule