Accessing SDRAM memory on Terasic DE0-Nano board.

Hello,

I want to write SDRAM through my custom hardware IP. I am using the Master Templates for this. I am writing using custom hardware and reading using NIOS, but my bios doesn't read the correct value.

Below is my code for writing into SDRAM.

I want to write on the click of a button (coe_switch[3]). I have one more doubt, "myBuffer_control_write_write_base" should be the base address for SDRAM or offset or base+offest.

reg searchForSync;

always @(posedge csi_clk or negedge rsi_rst) begin

if(!rsi_rst) begin

click <= 0;

searchForSync <= 0;

end else begin

if(coe_switch[3] == 0) begin

searchForSync <= 1;

myBuffer_control_write_fixed_location <= 0;

myBuffer_control_write_write_base <= 32'h00000000;

myBuffer_control_write_write_length <= 8;

myBuffer_control_write_go <= 1;

myBuffer_user_write_buffer_input_data <= 1;

myBuffer_user_write_write_buffer <= 1;

end

if(searchForSync == 1) begin

myBuffer_user_write_buffer_input_data <= 1;

myBuffer_user_write_write_buffer <= 1;

myBuffer_control_write_go <= 0;

if(asi_stin_sop_reg[319] == 1) begin

end

end

end

end

Please let me know if I am doing something wrong.

Please suggest.