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Add sdram, don't think it works though

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This commit is contained in:
Byron Lathi
2024-03-03 20:43:37 -08:00
parent 78dfb01bd7
commit 10a72d8e1f
17 changed files with 6256 additions and 31 deletions
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154
hw/super6502_fpga/src/rtl/super_6502_fpga.sv
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@@ -12,6 +12,19 @@ module super6502_fpga(
input i_pll_locked,
output logic o_pll_reset,
output logic o_sdr_CKE,
output logic o_sdr_n_CS,
output logic o_sdr_n_WE,
output logic o_sdr_n_RAS,
output logic o_sdr_n_CAS,
output logic [1:0] o_sdr_BA,
output logic [12:0] o_sdr_ADDR,
input logic [15:0] i_sdr_DATA,
output logic [15:0] o_sdr_DATA,
output logic [15:0] o_sdr_DATA_oe,
output logic [1:0] o_sdr_DQM,
input [7:0] i_cpu0_data_from_cpu,
input i_cpu0_sync,
input i_cpu0_rwb,
@@ -38,10 +51,21 @@ assign o_clk_phi2 = clk_cpu;
assign o_cpu0_data_oe = {8{i_cpu0_rwb}};
logic vio0_reset;
assign vio0_reset = '1;
logic master_reset;
logic sdram_ready;
logic [3:0] w_sdr_state;
logic pre_reset;
assign pre_reset = button_reset & vio0_reset;
assign sdram_ready = |w_sdr_state;
assign master_reset = pre_reset & sdram_ready;
assign master_reset = button_reset;
logic cpu0_AWVALID;
logic cpu0_AWREADY;
@@ -98,6 +122,24 @@ logic rom_rready;
logic [DATA_WIDTH-1:0] rom_rdata;
logic [1:0] rom_rresp;
logic sdram_AWVALID;
logic sdram_AWREADY;
logic [ADDR_WIDTH-1:0] sdram_AWADDR;
logic sdram_WVALID;
logic sdram_WREADY;
logic [DATA_WIDTH-1:0] sdram_WDATA;
logic [DATA_WIDTH/8-1:0] sdram_WSTRB;
logic sdram_BVALID;
logic sdram_BREADY;
logic [1:0] sdram_BRESP;
logic sdram_ARVALID;
logic sdram_ARREADY;
logic [ADDR_WIDTH-1:0] sdram_ARADDR;
logic sdram_RVALID;
logic sdram_RREADY;
logic [DATA_WIDTH-1:0] sdram_RDATA;
logic [1:0] sdram_RRESP;
cpu_wrapper u_cpu_wrapper_0(
.i_clk_cpu (clk_cpu),
@@ -145,7 +187,7 @@ cpu_wrapper u_cpu_wrapper_0(
axi_crossbar #(
.N_INITIATORS(1),
.N_TARGETS(2)
.N_TARGETS(3)
) u_crossbar (
.clk(i_sysclk),
.rst(~master_reset),
@@ -168,23 +210,24 @@ axi_crossbar #(
.ini_bvalid ({cpu0_BVALID }),
.ini_bready ({cpu0_BREADY }),
.tgt_araddr ({ram_araddr, rom_araddr }),
.tgt_arvalid ({ram_arvalid, rom_arvalid }),
.tgt_arready ({ram_arready, rom_arready }),
.tgt_rdata ({ram_rdata, rom_rdata }),
.tgt_rresp ({ram_rresp, rom_rresp }),
.tgt_rvalid ({ram_rvalid, rom_rvalid }),
.tgt_rready ({ram_rready, rom_rready }),
.tgt_awaddr ({ram_awaddr, rom_awaddr }),
.tgt_awvalid ({ram_awvalid, rom_awvalid }),
.tgt_awready ({ram_awready, rom_awready }),
.tgt_wdata ({ram_wdata, rom_wdata }),
.tgt_wvalid ({ram_wvalid, rom_wvalid }),
.tgt_wready ({ram_wready, rom_wready }),
.tgt_wstrb ({ram_wstrb, rom_wstrb }),
.tgt_bresp ({ram_bresp, rom_bresp }),
.tgt_bvalid ({ram_bvalid, rom_bvalid }),
.tgt_bready ({ram_bready, rom_bready })
.tgt_araddr ({ram_araddr, rom_araddr, sdram_ARADDR }),
.tgt_arvalid ({ram_arvalid, rom_arvalid, sdram_ARVALID }),
.tgt_arready ({ram_arready, rom_arready, sdram_ARREADY }),
.tgt_rdata ({ram_rdata, rom_rdata, sdram_RDATA }),
.tgt_rresp ({ram_rresp, rom_rresp, sdram_RRESP }),
.tgt_rvalid ({ram_rvalid, rom_rvalid, sdram_RVALID }),
.tgt_rready ({ram_rready, rom_rready, sdram_RREADY }),
.tgt_awaddr ({ram_awaddr, rom_awaddr, sdram_AWADDR }),
.tgt_awvalid ({ram_awvalid, rom_awvalid, sdram_AWVALID }),
.tgt_awready ({ram_awready, rom_awready, sdram_AWREADY }),
.tgt_wdata ({ram_wdata, rom_wdata, sdram_WDATA }),
.tgt_wvalid ({ram_wvalid, rom_wvalid, sdram_WVALID }),
.tgt_wready ({ram_wready, rom_wready, sdram_WREADY }),
.tgt_wstrb ({ram_wstrb, rom_wstrb, sdram_WSTRB }),
.tgt_bresp ({ram_bresp, rom_bresp, sdram_BRESP }),
.tgt_bvalid ({ram_bvalid, rom_bvalid, sdram_BVALID }),
.tgt_bready ({ram_bready, rom_bready, sdram_BREADY })
);
axi4_lite_rom #(
@@ -252,6 +295,79 @@ axi4_lite_ram #(
.i_WSTRB(ram_wstrb)
);
logic [1:0] w_sdr_CKE;
logic [1:0] w_sdr_n_CS;
logic [1:0] w_sdr_n_RAS;
logic [1:0] w_sdr_n_CAS;
logic [1:0] w_sdr_n_WE;
logic [3:0] w_sdr_BA;
logic [25:0] w_sdr_ADDR;
logic [31:0] w_sdr_DATA;
logic [31:0] w_sdr_DATA_oe;
logic [3:0] w_sdr_DQM;
assign o_sdr_CKE = w_sdr_CKE[0]; //Using SOFT ddio, ignore second cycle
assign o_sdr_n_CS = w_sdr_n_CS[0];
assign o_sdr_n_RAS = w_sdr_n_RAS[0];
assign o_sdr_n_CAS = w_sdr_n_CAS[0];
assign o_sdr_n_WE = w_sdr_n_WE[0];
assign o_sdr_BA = w_sdr_BA[0+:2];
assign o_sdr_ADDR = w_sdr_ADDR[0+:13];
assign o_sdr_DATA = w_sdr_DATA[0+:16];
assign o_sdr_DATA_oe = w_sdr_DATA_oe[0+:16];
assign o_sdr_DQM = w_sdr_DQM[0+:2];
sdram_controller u_sdram_controller(
.i_aresetn (pre_reset),
.i_sysclk (i_sysclk),
.i_sdrclk (i_sdrclk),
.i_tACclk (i_tACclk),
.o_pll_reset (),
.i_pll_locked ('1),
.o_sdr_state (w_sdr_state),
.i_AXI4_AWVALID (sdram_AWVALID),
.o_AXI4_AWREADY (sdram_AWREADY),
.i_AXI4_AWADDR (sdram_AWADDR[23:0]),
.i_AXI4_WVALID (sdram_WVALID),
.o_AXI4_WREADY (sdram_WREADY),
.i_AXI4_WDATA (sdram_WDATA),
.i_AXI4_WSTRB (sdram_WSTRB),
.o_AXI4_BVALID (sdram_BVALID),
.i_AXI4_BREADY (sdram_BREADY),
.i_AXI4_ARVALID (sdram_ARVALID),
.o_AXI4_ARREADY (sdram_ARREADY),
.i_AXI4_ARADDR (sdram_ARADDR[23:0]),
.o_AXI4_RVALID (sdram_RVALID),
.i_AXI4_RREADY (sdram_RREADY),
.o_AXI4_RDATA (sdram_RDATA),
.i_AXI4_WLAST (sdram_WVALID),
.o_AXI4_RLAST (),
.i_AXI4_AWID ('0),
.i_AXI4_AWSIZE ('0),
.i_AXI4_ARID ('0),
.i_AXI4_ARLEN ('0),
.i_AXI4_ARSIZE ('0),
.i_AXI4_ARBURST ('0),
.i_AXI4_AWLEN ('0),
.o_AXI4_RID (),
.o_AXI4_BID (),
.o_sdr_CKE (w_sdr_CKE),
.o_sdr_n_CS (w_sdr_n_CS),
.o_sdr_n_RAS (w_sdr_n_RAS),
.o_sdr_n_CAS (w_sdr_n_CAS),
.o_sdr_n_WE (w_sdr_n_WE),
.o_sdr_BA (w_sdr_BA),
.o_sdr_ADDR (w_sdr_ADDR),
.o_sdr_DATA (w_sdr_DATA),
.o_sdr_DATA_oe (w_sdr_DATA_oe),
.i_sdr_DATA ({{16'b0}, {i_sdr_DATA}}),
.o_sdr_DQM (w_sdr_DQM)
);
endmodule