On 28/02/11 12:19 PM, Wesley W. Terpstra wrote:
The changes in this patch:
2. support register file backed by ram blocks
=> saves quite some area and speed on altera
... be sure to enable it using `define CFG_EBR_POSEDGE_REGISTER_FILE
... and of course you need this file too (not that it's much complicated).
module lm32_dp_ram(
clk_i,
rst_i,
we_i,
waddr_i,
wdata_i,
raddr_i,
rdata_o);
parameter addr_width = 32;
parameter addr_depth = 1024;
parameter data_width = 8;
input clk_i;
input rst_i;
input we_i;
input [addr_width-1:0] waddr_i;
input [data_width-1:0] wdata_i;
input [addr_width-1:0] raddr_i;
output [data_width-1:0] rdata_o;
reg [data_width-1:0] ram[addr_depth-1:0];
reg [addr_width-1:0] raddr_r;
assign rdata_o = ram[raddr_r];
always @ (posedge clk_i)
begin
if (we_i)
ram[waddr_i] <= wdata_i;
raddr_r <= raddr_i;
end
endmodule
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