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Get SD card working in SPI

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This commit is contained in:
Byron Lathi
2023-07-23 14:55:14 -07:00
parent 6a1a76db35
commit 5ca5fca29b
23 changed files with 1257 additions and 1931 deletions
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69
hw/efinix_fpga/super6502.sv
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@@ -41,30 +41,12 @@ module super6502
output uart_tx,
output sd_cs,
output sd_clk,
input sd_cmd_IN,
output sd_cmd_OUT,
output sd_cmd_OE,
input sd_data_IN,
output sd_data_OUT,
output sd_data_OE
output spi_clk,
output spi_mosi,
input spi_miso
);
assign sd_cs = '1;
logic o_sd_cmd, i_sd_cmd;
logic o_sd_data, i_sd_data;
assign i_sd_cmd = sd_cmd_IN;
assign sd_cmd_OUT = '0;
assign sd_cmd_OE = ~o_sd_cmd;
assign i_sd_data = sd_data_IN;
assign sd_data_OUT = '0;
assign sd_data_OE = ~o_sd_data;
assign pll_cpu_reset = '1;
assign o_pll_reset = '1;
@@ -97,7 +79,7 @@ logic w_timer_cs;
logic w_multiplier_cs;
logic w_divider_cs;
logic w_uart_cs;
logic w_sdcard_cs;
logic w_spi_cs;
addr_decode u_addr_decode(
.i_addr(cpu_addr),
@@ -107,7 +89,7 @@ addr_decode u_addr_decode(
.o_multiplier_cs(w_multiplier_cs),
.o_divider_cs(w_divider_cs),
.o_uart_cs(w_uart_cs),
.o_sdcard_cs(w_sdcard_cs),
.o_spi_cs(w_spi_cs),
.o_sdram_cs(w_sdram_cs)
);
@@ -117,7 +99,7 @@ logic [7:0] w_timer_data_out;
logic [7:0] w_multiplier_data_out;
logic [7:0] w_divider_data_out;
logic [7:0] w_uart_data_out;
logic [7:0] w_sdcard_data_out;
logic [7:0] w_spi_data_out;
logic [7:0] w_sdram_data_out;
always_comb begin
@@ -133,8 +115,8 @@ always_comb begin
cpu_data_out = w_divider_data_out;
else if (w_uart_cs)
cpu_data_out = w_uart_data_out;
else if (w_sdcard_cs)
cpu_data_out = w_sdcard_data_out;
else if (w_spi_cs)
cpu_data_out = w_spi_data_out;
else if (w_sdram_cs)
cpu_data_out = w_sdram_data_out;
else
@@ -206,28 +188,19 @@ uart_wrapper u_uart(
.irqb(w_uart_irqb)
);
logic sd_clk;
always @(posedge clk_2) begin
sd_clk <= ~sd_clk;
end
spi_controller spi_controller(
.i_clk(clk_2),
.i_rst(~cpu_resb),
.i_cs(w_spi_cs),
.i_rwb(cpu_rwb),
.i_addr(cpu_addr[1:0]),
.i_data(cpu_data_in),
.o_data(w_spi_data_out),
sd_controller sd_controller(
.clk(clk_2),
.sd_clk(sd_clk),
.rst(rst),
.addr(cpu_addr[2:0]),
.data(cpu_data_in),
.cs(w_sdcard_cs),
.rw(cpu_rwb),
.i_sd_cmd(i_sd_cmd),
.o_sd_cmd(o_sd_cmd),
.i_sd_data(i_sd_data),
.o_sd_data(o_sd_data),
.data_out(w_sdcard_data_out)
.o_spi_cs(sd_cs),
.o_spi_clk(spi_clk),
.o_spi_mosi(spi_mosi),
.i_spi_miso(spi_miso)
);