📄 page_wr.v
字号:
module test(clk,rst,
data,addr,ba,
sdclk,cke,
cs_n,ras_n,cas_n,we_n,dqm,
flash_ce,flash_oe,flash_rw,
sram_ce,sram_oe,sram_we,sram_be
);
input clk,rst ;
inout [15:0 ] data ;
output [11:0 ] addr ;
output [1 :0 ] ba ;
output sdclk,cke ;
output cs_n,ras_n,cas_n,we_n ;
output [1 :0 ] dqm ;
output flash_ce,flash_oe,flash_rw ;
output sram_ce,sram_oe,sram_we ;
output [1 :0 ] sram_be ;
reg [15 : 0] dq; // SDRAM I/O
reg [11 : 0] addr; // SDRAM Address
reg [1 : 0] ba; // Bank Address
//reg sdclk; // Clock
reg cke; // Synchronous Clock Enable
reg cs_n; // CS#
reg ras_n; // RAS#
reg cas_n; // CAS#
reg we_n; // WE#
reg [1 : 0] dqm; // I/O Mask
reg [6 :0 ] state_cnt ;
wire [15 : 0] data = dq;
wire sdclk = clk ;
wire flash_ce = 1 ;
wire flash_oe = 1 ;
wire flash_rw = 1 ;
wire sram_ce = 1 ;
wire sram_oe = 1 ;
wire sram_we = 1 ;
wire [1 :0 ] sram_be = 2'b11 ;
parameter hi_z = 16'bz; // Hi-Z
parameter half_clk = 5;
parameter full_clk = 10;
task active;
input bank;
input [11 : 0] row;
input [15 : 0] dq_in;
begin
cke = 1;
cs_n = 0;
ras_n = 0;
cas_n = 1;
we_n = 1;
dqm = 0;
ba = bank;
addr = row;
dq = dq_in;
end
endtask
task auto_refresh;
begin
cke = 1;
cs_n = 0;
ras_n = 0;
cas_n = 0;
we_n = 1;
dqm = 0;
ba = 0;
addr = 0;
dq = hi_z;
end
endtask
task burst_term;
begin
cke = 1;
cs_n = 0;
ras_n = 1;
cas_n = 1;
we_n = 0;
dqm = 0;
ba = 0;
addr = 0;
dq = hi_z;
end
endtask
task load_mode_reg;
input [12 : 0] op_code;
begin
cke = 1;
cs_n = 0;
ras_n = 0;
cas_n = 0;
we_n = 0;
dqm = 0;
ba = op_code [12 :11];
addr = op_code [10 : 0];
dq = hi_z;
end
endtask
task nop;
input [1 : 0] dqm_in;
input [15 : 0] dq_in;
begin
cke = 1;
cs_n = 0;
ras_n = 1;
cas_n = 1;
we_n = 1;
dqm = dqm_in;
ba = 0;
addr = 0;
dq = dq_in;
end
endtask
task precharge_bank_0;
input [1 : 0] dqm_in;
input [15 : 0] dq_in;
begin
cke = 1;
cs_n = 0;
ras_n = 0;
cas_n = 1;
we_n = 0;
dqm = dqm_in;
ba = 0;
addr = 0;
dq = dq_in;
end
endtask
task precharge_bank_1;
input [1 : 0] dqm_in;
input [15 : 0] dq_in;
begin
cke = 1;
cs_n = 0;
ras_n = 0;
cas_n = 1;
we_n = 0;
dqm = dqm_in;
ba = 1;
addr = 0;
dq = dq_in;
end
endtask
task precharge_all_bank;
input [1 : 0] dqm_in;
input [15 : 0] dq_in;
begin
cke = 1;
cs_n = 0;
ras_n = 0;
cas_n = 1;
we_n = 0;
dqm = dqm_in;
ba = 0;
addr = 1024; // A10 = 1
dq = dq_in;
end
endtask
task read;
input bank;
input [7 : 0] column;
input [15 : 0] dq_in;
input [1 : 0] dqm_in;
begin
cke = 1;
cs_n = 0;
ras_n = 1;
cas_n = 0;
we_n = 1;
dqm = dqm_in;
ba = bank;
addr = column;
dq = dq_in;
end
endtask
task write;
input bank;
input [7 : 0] column;
input [15 : 0] dq_in;
input [1 : 0] dqm_in;
begin
cke = 1;
cs_n = 0;
ras_n = 1;
cas_n = 0;
we_n = 0;
dqm = dqm_in;
ba = bank;
addr = column;
dq = dq_in;
end
endtask
always @ ( posedge clk or negedge rst )
if( !rst )
begin
state_cnt <= 6'b000_000 ;
end
else
begin
if( 6'b110_011 <= state_cnt )
state_cnt <= 6'b000_000 ;
else
state_cnt <= state_cnt + 6'b000_001 ;
end
always @ ( posedge clk or negedge rst )
if( !rst )
begin
cke = 0;
cs_n = 1;
ras_n = 1;
cas_n = 1;
we_n = 1;
dqm = 3;
ba = 0;
addr = 0;
dq = hi_z;
end
else
begin
case( state_cnt )
'd1 : nop (0, hi_z); //1 Nop
'd10: precharge_all_bank(0, hi_z); //10 Precharge ALL Bank
'd11: nop (0, hi_z); //11 Nop
'd13: auto_refresh; //13 Auto Refresh
'd14: nop (0, hi_z); //14 Nop
'd22: auto_refresh; //22 Auto Refresh
'd23: nop (0, hi_z); //23 Nop
'd31: load_mode_reg (55); //31 Load Mode: Lat = 3, BL = FULL, Seq
'd32: nop (0, hi_z); //32 Nop
'd33: active (0, 0, hi_z); //33 Active: Bank = 0, Row = 0
'd34: nop (0, hi_z); //34 Nop
'd36: write (0, 0, 100, 0); //36 Write : Bank = 0, Col = 0, Dqm = 0
'd37: nop (0, 101); //37 Nop
'd38: nop (0, 102); //38 Nop
'd39: nop (0, 103); //39 Nop
'd40: nop (0, 104); //40 Nop
'd41: nop (0, 105); //41 Nop
'd42: nop (0, 106); //42 Nop
'd43: burst_term; //43 Burst Terminate
'd44: read(0, 0, hi_z, 0); //44 Nop
'd45: nop (0, hi_z); //45 Nop
'd46: nop (0, hi_z); //46 Nop
'd47: nop (0, hi_z); //47 Nop
'd48: nop (0, hi_z); //48 Nop
'd49: burst_term; //49 Nop
'd50: nop (0, hi_z); //50 Nop
endcase
end
endmodule⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -