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Hi.. I am trying to write/ read from the flash. I am working on an Altera DE2 board. I am just trying to write some value (8-bit) in into a fixed memory location in a flash, and am trying to read it. I am able to read values from flash code but not able to write the values I want.
i.e The value being read is not the value I wrote in that memory, which shows that 'write' operation is not taking place.
Please help me out.. (attached below :code )
module flashcontroller(
//REF_CLK,
RESET_N,
CLK,
SW,
SWIN,
//controller outputs
LEDR,
FL_ADDR,
FL_DQ,
FL_CE_N,
FL_OE_N,
FL_WE_N,
FL_RST_N,
);
//input REF_CLK;
input RESET_N;
input CLK;
input SW;
input [7:0] SWIN;
inout [7:0] FL_DQ ;
output [21:0] FL_ADDR;
output FL_CE_N;
output FL_OE_N;
output FL_WE_N;
output FL_RST_N;
output [7:0] LEDR;
wire[21:0] rFL_MAX;
reg [21:0] rFL_ADDR;
reg [7:0] rFL_DQ;
reg rFL_RST_N;
reg [7:0] rLEDR;
reg rFL_WE_N;
reg rFL_OE_N;
reg rFL_CE_N;
// assign rFL_MAX = 22'b1111111111111111111111;
// assign FL_DQ = 8'b10000001;
// assign FL_WE_N = 1'b1;
// assign FL_OE_N = 1'b0;
// assign FL_CE_N = 1'b0;
assign FL_RST_N = rFL_RST_N;
assign FL_ADDR = rFL_ADDR;
assign LEDR = rLEDR;
assign FL_DQ = rFL_DQ;
assign FL_CE_N = rFL_CE_N;
assign FL_OE_N = rFL_OE_N;
assign FL_WE_N = rFL_WE_N;
always@(posedge CLK or negedge RESET_N)
begin
if (!RESET_N)
begin
rFL_RST_N <= 0;
rFL_ADDR <= 0;
end
else if (SW == 1)
begin
rFL_RST_N <= 1;
rFL_DQ <= 8'bz;
rFL_WE_N <= 1'b1;
rFL_OE_N <= 1'b0;
rFL_CE_N <= 1'b0;
rLEDR <= FL_DQ;
end
else
begin
rFL_RST_N <= 1;
rFL_WE_N <= 1'b0;
rFL_OE_N <= 1'b1;
rFL_CE_N <= 1'b0;
rFL_DQ <= SWIN;
rLEDR <= SWIN;
// rFL_RST_N <= 1;
// if (rFL_ADDR > rFL_MAX)
// begin
// rFL_ADDR <= 0;
// end
// else
// begin
// rFL_ADDR <= rFL_ADDR+1;
// end
end
end
endmodule
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Hi. I sorry because my English is not good.
I read at this topic
http://www.alteraforum.com/forum/showthread.php?t=2541&page=2 Have done it yet? I'm trying to read data on kit de2 but i'm not success. Please send me your code or some advise.
Thank you so much. :D
Honored Contributor
