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[SC64][FW] Verilator tests + many bugfixes in the FPGA code (#75)

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Mateusz Faderewski 2024-07-21 11:15:08 +02:00 committed by GitHub
parent 5e33e516a2
commit 1b71b4a333
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GPG Key ID: B5690EEEBB952194
24 changed files with 1177 additions and 331 deletions
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6
fw/project/lcmxo2/sc64.ldf
View File

@ -3,6 +3,9 @@
<Options/>
<Implementation title="impl1" dir="impl1" description="impl1" synthesis="synplify" default_strategy="release">
<Options VerilogStandard="System Verilog" def_top="top" top="top"/>
<Source name="../../rtl/memory/dma_scb.sv" type="Verilog" type_short="Verilog">
<Options VerilogStandard="System Verilog"/>
</Source>
<Source name="../../rtl/memory/mem_bus.sv" type="Verilog" type_short="Verilog">
<Options VerilogStandard="System Verilog"/>
</Source>
@ -12,6 +15,9 @@
<Source name="../../rtl/sd/sd_scb.sv" type="Verilog" type_short="Verilog">
<Options VerilogStandard="System Verilog"/>
</Source>
<Source name="../../rtl/usb/usb_scb.sv" type="Verilog" type_short="Verilog">
<Options VerilogStandard="System Verilog"/>
</Source>
<Source name="../../rtl/fifo/fifo_bus.sv" type="Verilog" type_short="Verilog">
<Options VerilogStandard="System Verilog"/>
</Source>

2
fw/project/lcmxo2/sc64.lpf
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@ -214,7 +214,7 @@ LOCATE COMP "usb_miso" SITE "10" ;
LOCATE COMP "usb_pwrsav" SITE "2" ;
SYSCONFIG SDM_PORT=DISABLE I2C_PORT=ENABLE ;
VOLTAGE 3.300 V;
FREQUENCY NET "clk" 100.000000 MHz PAR_ADJ 10.000000 ;
FREQUENCY NET "clk" 100.000000 MHz ;
BLOCK PATH TO PORT "mcu_int" ;
BLOCK PATH TO PORT "n64_irq" ;
BLOCK PATH FROM PORT "usb_pwrsav" ;

6
fw/rtl/fifo/fifo_bus.sv
View File

@ -1,35 +1,29 @@
interface fifo_bus ();
logic rx_empty;
logic rx_almost_empty;
logic rx_read;
logic [7:0] rx_rdata;
logic tx_full;
logic tx_almost_full;
logic tx_write;
logic [7:0] tx_wdata;
modport controller (
input rx_empty,
input rx_almost_empty,
output rx_read,
input rx_rdata,
input tx_full,
input tx_almost_full,
output tx_write,
output tx_wdata
);
modport fifo (
output rx_empty,
output rx_almost_empty,
input rx_read,
output rx_rdata,
output tx_full,
output tx_almost_full,
input tx_write,
input tx_wdata
);

4
fw/rtl/fifo/fifo_junction.sv
View File

@ -11,16 +11,12 @@ module fifo_junction (
dev_bus.tx_wdata = cfg_bus.tx_write ? cfg_bus.tx_wdata : dma_bus.tx_wdata;
cfg_bus.rx_empty = dev_bus.rx_empty;
cfg_bus.rx_almost_empty = dev_bus.rx_almost_empty;
cfg_bus.rx_rdata = dev_bus.rx_rdata;
cfg_bus.tx_full = dev_bus.tx_full;
cfg_bus.tx_almost_full = dev_bus.tx_almost_full;
dma_bus.rx_empty = dev_bus.rx_empty;
dma_bus.rx_almost_empty = dev_bus.rx_almost_empty;
dma_bus.rx_rdata = dev_bus.rx_rdata;
dma_bus.tx_full = dev_bus.tx_full;
dma_bus.tx_almost_full = dev_bus.tx_almost_full;
end
endmodule

31
fw/rtl/memory/dma_scb.sv Normal file
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@ -0,0 +1,31 @@
interface dma_scb ();
logic start;
logic stop;
logic busy;
logic direction;
logic byte_swap;
logic [26:0] starting_address;
logic [26:0] transfer_length;
modport controller (
output start,
output stop,
input busy,
output direction,
output byte_swap,
output starting_address,
output transfer_length
);
modport dma (
input start,
input stop,
output busy,
input direction,
input byte_swap,
input starting_address,
input transfer_length
);
endinterface

575
fw/rtl/memory/memory_dma.sv
View File

@ -1,36 +1,3 @@
interface dma_scb ();
logic start;
logic stop;
logic busy;
logic direction;
logic byte_swap;
logic [26:0] starting_address;
logic [26:0] transfer_length;
modport controller (
output start,
output stop,
input busy,
output direction,
output byte_swap,
output starting_address,
output transfer_length
);
modport dma (
input start,
input stop,
output busy,
input direction,
input byte_swap,
input starting_address,
input transfer_length
);
endinterface
module memory_dma (
input clk,
input reset,
@ -41,227 +8,403 @@ module memory_dma (
mem_bus.controller mem_bus
);
// DMA start/stop control
// Start/stop logic
logic dma_start;
logic dma_stop;
logic dma_stop_requested;
always_comb begin
dma_start = dma_scb.start && !dma_scb.stop && !dma_scb.busy;
dma_stop = dma_scb.stop;
always_ff @(posedge clk) begin
dma_start <= 1'b0;
if (dma_scb.stop) begin
dma_stop <= 1'b1;
end else if (dma_scb.start) begin
dma_start <= 1'b1;
dma_stop <= 1'b0;
end
end
// Memory bus controller
typedef enum bit [1:0] {
MEM_BUS_STATE_IDLE,
MEM_BUS_STATE_WAIT,
MEM_BUS_STATE_TRANSFER
} e_mem_bus_state;
e_mem_bus_state mem_bus_state;
e_mem_bus_state next_mem_bus_state;
logic mem_bus_wdata_ready;
logic mem_bus_wdata_empty;
logic mem_bus_wdata_end;
logic [1:0] mem_bus_wdata_valid;
logic [15:0] mem_bus_wdata_buffer;
logic mem_bus_rdata_ready;
logic mem_bus_rdata_ack;
logic mem_bus_rdata_end;
logic [1:0] mem_bus_rdata_valid;
logic [15:0] mem_bus_rdata_buffer;
logic [26:0] mem_bus_remaining_bytes;
logic mem_bus_last_transfer;
logic mem_bus_almost_last_transfer;
logic mem_bus_unaligned_start;
logic mem_bus_unaligned_end;
always_ff @(posedge clk) begin
if (reset) begin
dma_stop_requested <= 1'b0;
mem_bus_state <= MEM_BUS_STATE_IDLE;
end else begin
if (dma_stop) begin
dma_stop_requested <= 1'b1;
end
if (dma_start) begin
dma_stop_requested <= 1'b0;
mem_bus_state <= next_mem_bus_state;
end
end
end
// Remaining counter and FIFO enable
logic [26:0] remaining;
logic trx_enabled;
always_comb begin
trx_enabled = remaining > 27'd0;
next_mem_bus_state = mem_bus_state;
mem_bus_last_transfer = (mem_bus_remaining_bytes == 27'd0);
mem_bus_almost_last_transfer = (mem_bus_remaining_bytes <= 27'd2);
mem_bus_wdata_end = mem_bus_last_transfer;
mem_bus_wdata_valid = (mem_bus_unaligned_end && mem_bus_almost_last_transfer) ? 2'b10 :
mem_bus_unaligned_start ? 2'b01 :
2'b11;
case (mem_bus_state)
MEM_BUS_STATE_IDLE: begin
if (dma_start) begin
next_mem_bus_state = MEM_BUS_STATE_WAIT;
end
end
MEM_BUS_STATE_WAIT: begin
if (dma_stop || mem_bus_last_transfer) begin
next_mem_bus_state = MEM_BUS_STATE_IDLE;
end else if (mem_bus_wdata_ready || !mem_bus_wdata_empty || mem_bus_rdata_ready) begin
next_mem_bus_state = MEM_BUS_STATE_TRANSFER;
end
end
MEM_BUS_STATE_TRANSFER: begin
if (mem_bus.ack) begin
if (dma_stop || mem_bus_last_transfer) begin
next_mem_bus_state = MEM_BUS_STATE_IDLE;
end else if (!(mem_bus_wdata_ready || !mem_bus_wdata_empty || mem_bus_rdata_ready)) begin
next_mem_bus_state = MEM_BUS_STATE_WAIT;
end
end
end
default: begin
next_mem_bus_state = MEM_BUS_STATE_IDLE;
end
endcase
end
always_ff @(posedge clk) begin
mem_bus_rdata_ack <= 1'b0;
if (mem_bus.ack) begin
mem_bus.request <= 1'b0;
mem_bus.address <= (mem_bus.address + 26'd2);
mem_bus_rdata_ack <= 1'b1;
mem_bus_rdata_end <= mem_bus_last_transfer;
mem_bus_rdata_valid <= mem_bus.wmask;
mem_bus_rdata_buffer <= mem_bus.rdata;
end
if (mem_bus_wdata_ready) begin
mem_bus_wdata_empty <= 1'b0;
end
case (mem_bus_state)
MEM_BUS_STATE_IDLE: begin
mem_bus.request <= 1'b0;
mem_bus_rdata_end <= 1'b1;
if (dma_start) begin
mem_bus.write <= dma_scb.direction;
mem_bus.address <= {dma_scb.starting_address[26:1], 1'b0};
mem_bus_remaining_bytes <= dma_scb.transfer_length;
mem_bus_unaligned_start <= dma_scb.starting_address[0];
mem_bus_unaligned_end <= (dma_scb.starting_address[0] ^ dma_scb.transfer_length[0]);
mem_bus_rdata_end <= 1'b0;
mem_bus_wdata_empty <= 1'b1;
end
end
MEM_BUS_STATE_WAIT: begin
if (!dma_stop && !mem_bus_last_transfer) begin
if (mem_bus_wdata_ready || !mem_bus_wdata_empty || mem_bus_rdata_ready) begin
mem_bus.request <= 1'b1;
mem_bus_unaligned_start <= 1'b0;
mem_bus.wdata <= (dma_scb.byte_swap ? {mem_bus_wdata_buffer[7:0], mem_bus_wdata_buffer[15:8]} : mem_bus_wdata_buffer);
mem_bus.wmask <= 2'b11;
mem_bus_remaining_bytes <= (mem_bus_remaining_bytes - 27'd2);
if (mem_bus_unaligned_end && mem_bus_almost_last_transfer) begin
mem_bus.wmask <= 2'b10;
mem_bus_remaining_bytes <= (mem_bus_remaining_bytes - 27'd1);
end
if (mem_bus_unaligned_start) begin
mem_bus.wmask <= 2'b01;
mem_bus_remaining_bytes <= (mem_bus_remaining_bytes - 27'd1);
end
mem_bus_wdata_empty <= 1'b1;
end
end
end
MEM_BUS_STATE_TRANSFER: begin
if (!dma_stop && !mem_bus_last_transfer) begin
if (mem_bus.ack && (mem_bus_wdata_ready || !mem_bus_wdata_empty || mem_bus_rdata_ready)) begin
mem_bus.request <= 1'b1;
mem_bus.wdata <= (dma_scb.byte_swap ? {mem_bus_wdata_buffer[7:0], mem_bus_wdata_buffer[15:8]} : mem_bus_wdata_buffer);
mem_bus.wmask <= 2'b11;
mem_bus_remaining_bytes <= (mem_bus_remaining_bytes - 27'd2);
if (mem_bus_unaligned_end && mem_bus_almost_last_transfer) begin
mem_bus.wmask <= 2'b10;
mem_bus_remaining_bytes <= (mem_bus_remaining_bytes - 27'd1);
end
mem_bus_wdata_empty <= 1'b1;
end
end
end
default: begin end
endcase
end
// RX FIFO controller
logic [1:0] rx_wmask;
logic rx_rdata_pop;
logic rx_rdata_shift;
logic rx_rdata_valid;
logic [15:0] rx_buffer;
logic rx_buffer_valid;
logic [1:0] rx_buffer_counter;
logic [1:0] rx_buffer_valid_counter;
typedef enum bit [2:0] {
RX_FIFO_BUS_STATE_IDLE,
RX_FIFO_BUS_STATE_WAIT,
RX_FIFO_BUS_STATE_TRANSFER_1,
RX_FIFO_BUS_STATE_TRANSFER_2,
RX_FIFO_BUS_STATE_ACK
} e_rx_fifo_bus_state;
e_rx_fifo_bus_state rx_fifo_bus_state;
e_rx_fifo_bus_state next_rx_fifo_bus_state;
logic rx_fifo_shift;
logic rx_fifo_shift_delayed;
logic [1:0] rx_fifo_valid;
always_ff @(posedge clk) begin
if (reset || dma_stop) begin
rx_fifo_bus_state <= RX_FIFO_BUS_STATE_IDLE;
end else begin
rx_fifo_bus_state <= next_rx_fifo_bus_state;
end
end
always_comb begin
rx_buffer_valid = rx_buffer_valid_counter == 2'd2;
next_rx_fifo_bus_state = rx_fifo_bus_state;
rx_fifo_shift = 1'b0;
fifo_bus.rx_read = 1'b0;
case (rx_fifo_bus_state)
RX_FIFO_BUS_STATE_IDLE: begin
if (dma_start && dma_scb.direction) begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_WAIT;
end
end
RX_FIFO_BUS_STATE_WAIT: begin
if (mem_bus_wdata_end) begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_IDLE;
end else if (mem_bus_wdata_empty) begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_TRANSFER_1;
end
end
RX_FIFO_BUS_STATE_TRANSFER_1: begin
fifo_bus.rx_read = (!fifo_bus.rx_empty && rx_fifo_valid[1]);
if (!fifo_bus.rx_empty || !rx_fifo_valid[1]) begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_TRANSFER_2;
rx_fifo_shift = 1'b1;
end
end
RX_FIFO_BUS_STATE_TRANSFER_2: begin
fifo_bus.rx_read = (!fifo_bus.rx_empty && rx_fifo_valid[1]);
if (!fifo_bus.rx_empty || !rx_fifo_valid[1]) begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_ACK;
rx_fifo_shift = 1'b1;
end
end
RX_FIFO_BUS_STATE_ACK: begin
if (mem_bus_wdata_ready) begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_WAIT;
end
end
default: begin
next_rx_fifo_bus_state = RX_FIFO_BUS_STATE_IDLE;
end
endcase
end
always_ff @(posedge clk) begin
rx_rdata_pop <= (
!rx_rdata_pop &&
!fifo_bus.rx_read &&
trx_enabled &&
rx_buffer_counter < 2'd2 &&
!fifo_bus.rx_empty &&
mem_bus.write
);
rx_rdata_shift <= 1'b0;
fifo_bus.rx_read <= rx_rdata_pop;
rx_rdata_valid <= fifo_bus.rx_read;
mem_bus_wdata_ready <= 1'b0;
rx_fifo_shift_delayed <= rx_fifo_shift;
if (dma_start) begin
if (dma_scb.starting_address[0]) begin
rx_wmask <= 2'b01;
rx_buffer_counter <= 2'd1;
rx_buffer_valid_counter <= 2'd1;
end else begin
rx_wmask <= 2'b11;
rx_buffer_counter <= 2'd0;
rx_buffer_valid_counter <= 2'd0;
if (rx_fifo_shift) begin
rx_fifo_valid <= {rx_fifo_valid[0], 1'bX};
end
if (rx_fifo_shift_delayed) begin
if (rx_fifo_bus_state == RX_FIFO_BUS_STATE_ACK) begin
mem_bus_wdata_ready <= 1'b1;
end
mem_bus_wdata_buffer <= {mem_bus_wdata_buffer[7:0], fifo_bus.rx_rdata};
end
case (rx_fifo_bus_state)
RX_FIFO_BUS_STATE_WAIT: begin
if (mem_bus_wdata_empty) begin
rx_fifo_valid <= mem_bus_wdata_valid;
end
end
if (rx_rdata_pop) begin
rx_buffer_counter <= rx_buffer_counter + 1'd1;
end
if (rx_rdata_shift || rx_rdata_valid) begin
if (dma_scb.byte_swap) begin
rx_buffer <= {fifo_bus.rx_rdata, rx_buffer[15:8]};
end else begin
rx_buffer <= {rx_buffer[7:0], fifo_bus.rx_rdata};
end
rx_buffer_valid_counter <= rx_buffer_valid_counter + 1'd1;
if (remaining == 27'd0 && rx_buffer_counter == 2'd1) begin
rx_wmask <= 2'b10;
rx_rdata_shift <= 1'b1;
rx_buffer_counter <= rx_buffer_counter + 1'd1;
end
end
if (rx_buffer_valid && !mem_bus.request) begin
rx_wmask <= 2'b11;
rx_buffer_counter <= 2'd0;
rx_buffer_valid_counter <= 2'd0;
end
default: begin end
endcase
end
// TX FIFO controller
logic tx_wdata_push;
logic tx_wdata_first_push;
logic [7:0] tx_buffer;
logic tx_buffer_counter;
logic tx_buffer_ready;
logic tx_buffer_valid;
typedef enum bit [1:0] {
TX_FIFO_BUS_STATE_IDLE,
TX_FIFO_BUS_STATE_WAIT,
TX_FIFO_BUS_STATE_TRANSFER_1,
TX_FIFO_BUS_STATE_TRANSFER_2
} e_tx_fifo_bus_state;
e_tx_fifo_bus_state tx_fifo_bus_state;
e_tx_fifo_bus_state next_tx_fifo_bus_state;
logic tx_fifo_shift;
logic tx_fifo_waiting;
logic [1:0] tx_fifo_valid;
logic [15:0] tx_fifo_buffer;
always_ff @(posedge clk) begin
if (reset || dma_stop) begin
tx_fifo_bus_state <= TX_FIFO_BUS_STATE_IDLE;
end else begin
tx_fifo_bus_state <= next_tx_fifo_bus_state;
end
end
always_comb begin
fifo_bus.tx_write = tx_wdata_push;
next_tx_fifo_bus_state = tx_fifo_bus_state;
tx_fifo_shift = 1'b0;
fifo_bus.tx_write = 1'b0;
fifo_bus.tx_wdata = tx_fifo_buffer[15:8];
case (tx_fifo_bus_state)
TX_FIFO_BUS_STATE_IDLE: begin
if (dma_start && !dma_scb.direction) begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_WAIT;
end
end
TX_FIFO_BUS_STATE_WAIT: begin
if (mem_bus_rdata_ack || tx_fifo_waiting) begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_TRANSFER_1;
end else if (mem_bus_rdata_end) begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_IDLE;
end
end
TX_FIFO_BUS_STATE_TRANSFER_1: begin
fifo_bus.tx_write = (!fifo_bus.tx_full && tx_fifo_valid[1]);
if (!fifo_bus.tx_full || !tx_fifo_valid[1]) begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_TRANSFER_2;
tx_fifo_shift = 1'b1;
end
end
TX_FIFO_BUS_STATE_TRANSFER_2: begin
fifo_bus.tx_write = (!fifo_bus.tx_full && tx_fifo_valid[1]);
if (!fifo_bus.tx_full || !tx_fifo_valid[1]) begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_WAIT;
tx_fifo_shift = 1'b1;
if (!mem_bus_rdata_ack && !tx_fifo_waiting && mem_bus_rdata_end) begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_IDLE;
end
end
end
default: begin
next_tx_fifo_bus_state = TX_FIFO_BUS_STATE_IDLE;
end
endcase
end
always_ff @(posedge clk) begin
tx_wdata_push <= (
!tx_wdata_push &&
trx_enabled &&
tx_buffer_valid &&
!fifo_bus.tx_full &&
!mem_bus.write
if (tx_fifo_shift) begin
tx_fifo_valid <= {tx_fifo_valid[0], 1'bX};
tx_fifo_buffer <= {tx_fifo_buffer[7:0], 8'hXX};
end
case (tx_fifo_bus_state)
TX_FIFO_BUS_STATE_IDLE: begin
mem_bus_rdata_ready <= 1'b0;
tx_fifo_waiting <= 1'b0;
if (dma_start) begin
mem_bus_rdata_ready <= !dma_scb.direction;
end
end
TX_FIFO_BUS_STATE_WAIT: begin
if (mem_bus_rdata_ack || tx_fifo_waiting) begin
mem_bus_rdata_ready <= 1'b0;
tx_fifo_waiting <= 1'b0;
tx_fifo_valid <= mem_bus_rdata_valid;
tx_fifo_buffer <= mem_bus_rdata_buffer;
end
end
TX_FIFO_BUS_STATE_TRANSFER_1: begin
if (mem_bus_rdata_ack) begin
tx_fifo_waiting <= 1'b1;
end
end
TX_FIFO_BUS_STATE_TRANSFER_2: begin
if (mem_bus_rdata_ack) begin
tx_fifo_waiting <= 1'b1;
end
if (fifo_bus.tx_write || !tx_fifo_valid[1]) begin
mem_bus_rdata_ready <= !mem_bus_rdata_end;
end
end
default: begin end
endcase
end
// DMA busy indicator
always_ff @(posedge clk) begin
dma_scb.busy <= (
(dma_scb.start && !dma_scb.stop) ||
dma_start ||
(mem_bus_state != MEM_BUS_STATE_IDLE) ||
(rx_fifo_bus_state != RX_FIFO_BUS_STATE_IDLE) ||
(tx_fifo_bus_state != TX_FIFO_BUS_STATE_IDLE)
);
if (reset || dma_stop) begin
tx_buffer_ready <= 1'b0;
tx_buffer_valid <= 1'b0;
end
if (dma_start) begin
tx_wdata_first_push <= 1'b1;
tx_buffer_ready <= 1'b1;
tx_buffer_valid <= 1'b0;
end
if (tx_buffer_ready && mem_bus.request) begin
tx_buffer_ready <= 1'b0;
end
if (mem_bus.ack) begin
tx_wdata_first_push <= 1'b0;
tx_buffer_counter <= 1'd1;
tx_buffer_valid <= 1'b1;
{fifo_bus.tx_wdata, tx_buffer} <= mem_bus.rdata;
if (tx_wdata_first_push && dma_scb.starting_address[0]) begin
fifo_bus.tx_wdata <= mem_bus.rdata[7:0];
tx_buffer_counter <= 1'd0;
end
end
if (tx_wdata_push) begin
tx_buffer_counter <= tx_buffer_counter - 1'd1;
fifo_bus.tx_wdata <= tx_buffer;
if (tx_buffer_counter == 1'd0) begin
tx_buffer_ready <= 1'b1;
tx_buffer_valid <= 1'b0;
end
end
end
// Remaining counter controller
always_ff @(posedge clk) begin
if (reset || dma_stop) begin
remaining <= 27'd0;
end else begin
if (dma_start) begin
remaining <= dma_scb.transfer_length;
end
if (!dma_stop_requested && ((mem_bus.write && rx_rdata_pop) || (!mem_bus.write && tx_wdata_push))) begin
remaining <= remaining - 1'd1;
end
end
end
// Mem bus controller
always_ff @(posedge clk) begin
dma_scb.busy <= mem_bus.request || trx_enabled;
end
always_ff @(posedge clk) begin
if (reset) begin
mem_bus.request <= 1'b0;
end else begin
if (!mem_bus.request) begin
if (mem_bus.write) begin
if (rx_buffer_valid) begin
mem_bus.request <= 1'b1;
mem_bus.wmask <= rx_wmask;
mem_bus.wdata <= rx_buffer;
end
end else begin
if (tx_buffer_ready) begin
mem_bus.request <= 1'b1;
end
end
end
end
if (mem_bus.ack) begin
mem_bus.request <= 1'b0;
end
end
always_ff @(posedge clk) begin
if (dma_start) begin
mem_bus.write <= dma_scb.direction;
end
end
always_ff @(posedge clk) begin
if (dma_start) begin
mem_bus.address <= {dma_scb.starting_address[26:1], 1'b0};
end
if (mem_bus.ack) begin
mem_bus.address <= mem_bus.address + 2'd2;
end
end
endmodule

136
fw/rtl/memory/memory_sdram.sv
View File

@ -14,29 +14,38 @@ module memory_sdram (
inout [15:0] sdram_dq
);
localparam [2:0] CAS_LATENCY = 3'd2;
// in Hz
localparam real FREQUENCY = 100_000_000.0;
// in clocks
localparam bit [2:0] CAS_LATENCY = 3'd2;
// in nanoseconds
localparam real T_INIT = 100_000.0;
localparam real T_RC = 60.0;
localparam real T_RP = 15.0;
localparam real T_RCD = 15.0;
localparam real T_MRD = 14.0;
localparam real T_REF = 7_800.0;
localparam real T_RAS = 37.0;
localparam real T_RC = 60.0;
localparam real T_RCD = 15.0;
localparam real T_REF = 7_812.5;
localparam real T_RP = 15.0;
localparam real T_CLK = (1.0 / 100_000_000) * 1_000_000_000.0;
localparam int C_INIT = int'((T_INIT + T_CLK - 1) / T_CLK);
localparam int C_RC = int'((T_RC + T_CLK - 1) / T_CLK);
localparam int C_RP = int'((T_RP + T_CLK - 1) / T_CLK);
localparam int C_RCD = int'((T_RCD + T_CLK - 1) / T_CLK);
localparam int C_MRD = int'((T_MRD + T_CLK - 1) / T_CLK);
localparam int C_REF = int'((T_REF + T_CLK - 1) / T_CLK);
localparam real T_CLK = (1.0 / FREQUENCY) * 1_000_000_000.0;
localparam INIT_PRECHARGE = 4'd0;
localparam INIT_REFRESH_1 = C_RP;
localparam INIT_REFRESH_2 = C_RP + C_RC;
localparam INIT_MODE_REG = C_RP + (2 * C_RC);
localparam INIT_DONE = C_RP + (2 * C_RC) + C_MRD;
const bit [13:0] C_INIT = 14'(int'($ceil(T_INIT / T_CLK)));
const bit [4:0] C_MRD = 5'(int'($ceil(T_MRD / T_CLK)));
const bit [2:0] C_RAS = 3'(int'($ceil(T_RAS / T_CLK)));
const bit [4:0] C_RC = 5'(int'($ceil(T_RC / T_CLK)));
const bit [4:0] C_RCD = 5'(int'($ceil(T_RCD / T_CLK)));
const bit [13:0] C_REF = 14'(int'($ceil(T_REF / T_CLK)));
const bit [4:0] C_RP = 5'(int'($ceil(T_RP / T_CLK)));
const bit [4:0] INIT_PRECHARGE = 5'd0;
const bit [4:0] INIT_REFRESH_1 = INIT_PRECHARGE + C_RP;
const bit [4:0] INIT_REFRESH_2 = INIT_REFRESH_1 + C_RC;
const bit [4:0] INIT_MODE_REG = INIT_REFRESH_2 + C_RC;
const bit [4:0] INIT_DONE = INIT_MODE_REG + C_MRD;
// /CS, /RAS, /CAS, /WE
typedef enum bit [3:0] {
CMD_DESL = 4'b1111,
CMD_NOP = 4'b0111,
@ -58,13 +67,10 @@ module memory_sdram (
always_ff @(posedge clk) begin
{sdram_cs, sdram_ras, sdram_cas, sdram_we} <= 4'(sdram_next_cmd);
{sdram_ba, sdram_a} <= 15'd0;
sdram_dqm <= 2'b00;
sdram_dq_input <= sdram_dq;
sdram_dq_output <= mem_bus.wdata;
sdram_dq_output_enable <= 1'b0;
case (sdram_next_cmd)
@ -76,19 +82,31 @@ module memory_sdram (
CMD_ACT: begin
{sdram_ba, sdram_a} <= mem_bus.address[25:11];
sdram_dqm <= 2'b00;
current_active_bank_row <= mem_bus.address[25:11];
end
CMD_PRE: begin
{sdram_ba, sdram_a} <= {2'b00, 2'b00, 1'b1, 10'd0};
sdram_dqm <= 2'b00;
{sdram_ba, sdram_a} <= {
2'b00, // [BA1:BA0] Don't care
2'b00, // [A12:A11] Don't care
1'b1, // [A10] Precharge all banks
10'd0 // [A9:A0] Don't care
};
end
CMD_MRS: begin
{sdram_ba, sdram_a} <= {2'b00, 1'b0, 1'b0, 2'b00, CAS_LATENCY, 1'b0, 3'b000};
sdram_dqm <= 2'b00;
{sdram_ba, sdram_a} <= {
2'b00, // [BA1:BA0] Reserved = 0
3'b000, // [A12:A10] Reserved = 0
1'b0, // [A9] Write Burst Mode = Programmed Burst Length
2'b00, // [A8:A7] Operating Mode = Standard Operation
CAS_LATENCY, // [A6:A4] Latency Mode = 2
1'b0, // [A3] Burst Type = Sequential
3'b000 // [A2:A0] Burst Length = 1
};
end
default: begin end
endcase
end
@ -121,35 +139,51 @@ module memory_sdram (
end
end
logic [13:0] powerup_coutner;
logic powerup_done;
logic [13:0] refresh_counter;
logic [4:0] wait_counter;
logic [9:0] refresh_counter;
logic [2:0] precharge_counter;
logic powerup_done;
logic pending_refresh;
logic precharge_valid;
always_ff @(posedge clk) begin
if (reset) begin
powerup_coutner <= 14'd0;
powerup_done <= 1'b0;
end else if (powerup_coutner < C_INIT) begin
powerup_coutner <= powerup_coutner + 1'd1;
end else begin
refresh_counter <= refresh_counter + 1'd1;
if (refresh_counter == C_INIT) begin
refresh_counter <= 14'd0;
powerup_done <= 1'b1;
end
if (reset || state != next_state) begin
wait_counter <= 5'd0;
end else begin
wait_counter <= wait_counter + 1'd1;
if (powerup_done && refresh_counter == C_REF - 14'd1) begin
refresh_counter <= 14'd0;
pending_refresh <= 1'b1;
end
if (sdram_next_cmd == CMD_REF) begin
refresh_counter <= 10'd0;
pending_refresh <= 1'b0;
end else if (refresh_counter < C_REF) begin
refresh_counter <= refresh_counter + 1'd1;
end else begin
pending_refresh <= 1'b1;
end
if (reset) begin
refresh_counter <= 14'd0;
powerup_done <= 1'b0;
pending_refresh <= 1'b0;
end
wait_counter <= wait_counter + 1'd1;
if (state != next_state) begin
wait_counter <= 5'd0;
end
precharge_counter <= precharge_counter + 1'd1;
if (precharge_counter >= C_RAS - 2'd2) begin
precharge_valid <= 1'b1;
end
if (sdram_next_cmd == CMD_ACT) begin
precharge_counter <= 3'd0;
precharge_valid <= 1'b0;
end
end
@ -157,6 +191,7 @@ module memory_sdram (
always_ff @(posedge clk) begin
mem_bus.ack <= 1'b0;
read_cmd_ack_delay <= {sdram_next_cmd == CMD_READ, read_cmd_ack_delay[(CAS_LATENCY):1]};
if (sdram_next_cmd == CMD_WRITE || read_cmd_ack_delay[0]) begin
@ -202,20 +237,20 @@ module memory_sdram (
end
S_ACTIVATING: begin
if (wait_counter == C_RCD) begin
if (wait_counter == C_RCD - 5'd2) begin
next_state = S_ACTIVE;
end
end
S_ACTIVE: begin
if (pending_refresh) begin
if (pending_refresh && precharge_valid) begin
next_state = S_PRECHARGE;
sdram_next_cmd = CMD_PRE;
end else if (mem_bus.request) begin
if (request_in_current_active_bank_row) begin
next_state = S_BUSY;
sdram_next_cmd = mem_bus.write ? CMD_WRITE : CMD_READ;
end else begin
end else if (precharge_valid) begin
next_state = S_PRECHARGE;
sdram_next_cmd = CMD_PRE;
end
@ -229,18 +264,13 @@ module memory_sdram (
end
S_PRECHARGE: begin
if (wait_counter == C_RP) begin
if (pending_refresh) begin
next_state = S_REFRESH;
sdram_next_cmd = CMD_REF;
end else begin
if (wait_counter == C_RP - 5'd2) begin
next_state = S_IDLE;
end
end
end
S_REFRESH: begin
if (wait_counter == C_RC) begin
if (wait_counter == C_RC - 5'd2) begin
next_state = S_IDLE;
end
end

6
fw/rtl/sd/sd_dat.sv
View File

@ -36,12 +36,10 @@ module sd_dat (
// FIFO
logic rx_full;
logic rx_almost_full;
logic rx_write;
logic [7:0] rx_wdata;
logic tx_empty;
logic tx_almost_empty;
logic tx_read;
logic [7:0] tx_rdata;
@ -50,12 +48,10 @@ module sd_dat (
.reset(reset || sd_scb.dat_fifo_flush),
.empty(fifo_bus.rx_empty),
.almost_empty(fifo_bus.rx_almost_empty),
.read(fifo_bus.rx_read),
.rdata(fifo_bus.rx_rdata),
.full(rx_full),
.almost_full(rx_almost_full),
.write(rx_write),
.wdata(rx_wdata),
@ -67,12 +63,10 @@ module sd_dat (
.reset(reset || sd_scb.dat_fifo_flush),
.empty(tx_empty),
.almost_empty(tx_almost_empty),
.read(tx_read),
.rdata(tx_rdata),
.full(fifo_bus.tx_full),
.almost_full(fifo_bus.tx_almost_full),
.write(fifo_bus.tx_write),
.wdata(fifo_bus.tx_wdata),

76
fw/rtl/usb/usb_ft1248.sv
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@ -1,42 +1,3 @@
interface usb_scb ();
logic fifo_flush;
logic fifo_flush_busy;
logic write_buffer_flush;
logic [10:0] rx_count;
logic [10:0] tx_count;
logic pwrsav;
logic reset_state;
logic reset_on_ack;
logic reset_off_ack;
modport controller (
output fifo_flush,
input fifo_flush_busy,
output write_buffer_flush,
input rx_count,
input tx_count,
input pwrsav,
input reset_state,
output reset_on_ack,
output reset_off_ack
);
modport usb (
input fifo_flush,
output fifo_flush_busy,
input write_buffer_flush,
output rx_count,
output tx_count,
output pwrsav,
output reset_state,
input reset_on_ack,
input reset_off_ack
);
endinterface
module usb_ft1248 (
input clk,
input reset,
@ -53,12 +14,10 @@ module usb_ft1248 (
);
logic rx_full;
logic rx_almost_full;
logic rx_write;
logic rx_write_delayed;
logic [7:0] rx_wdata;
logic tx_empty;
logic tx_almost_empty;
logic tx_read;
logic [7:0] tx_rdata;
@ -66,16 +25,14 @@ module usb_ft1248 (
fifo_8kb fifo_8kb_rx_inst (
.clk(clk),
.reset(reset || fifo_flush),
.reset(fifo_flush),
.empty(fifo_bus.rx_empty),
.almost_empty(fifo_bus.rx_almost_empty),
.read(fifo_bus.rx_read),
.rdata(fifo_bus.rx_rdata),
.full(rx_full),
.almost_full(rx_almost_full),
.write(rx_write),
.write(rx_write_delayed),
.wdata(rx_wdata),
.count(usb_scb.rx_count)
@ -83,15 +40,13 @@ module usb_ft1248 (
fifo_8kb fifo_8kb_tx_inst (
.clk(clk),
.reset(reset || fifo_flush),
.reset(fifo_flush),
.empty(tx_empty),
.almost_empty(tx_almost_empty),
.read(tx_read),
.rdata(tx_rdata),
.full(fifo_bus.tx_full),
.almost_full(fifo_bus.tx_almost_full),
.write(fifo_bus.tx_write),
.wdata(fifo_bus.tx_wdata),
@ -145,6 +100,8 @@ module usb_ft1248 (
e_cmd cmd;
e_cmd next_cmd;
logic [3:0] phase;
logic rx_write;
logic last_rx_failed;
logic last_tx_failed;
logic reset_reply;
logic [4:0] modem_status_counter;
@ -158,6 +115,8 @@ module usb_ft1248 (
usb_scb.pwrsav <= !ft_pwrsav;
fifo_flush <= 1'b0;
rx_write_delayed <= rx_write;
phase <= {phase[2:0], phase[3]};
if (state == STATE_IDLE) begin
phase <= 4'b0100;
@ -166,6 +125,7 @@ module usb_ft1248 (
if (reset) begin
usb_scb.fifo_flush_busy <= 1'b0;
usb_scb.reset_state <= 1'b0;
last_rx_failed <= 1'b0;
last_tx_failed <= 1'b0;
reset_reply <= 1'b0;
modem_status_counter <= 5'd0;
@ -195,9 +155,19 @@ module usb_ft1248 (
if (usb_scb.fifo_flush_busy) begin
usb_scb.fifo_flush_busy <= 1'b0;
fifo_flush <= 1'b1;
last_rx_failed <= 1'b0;
last_tx_failed <= 1'b0;
end else if (last_rx_failed && !rx_full) begin
last_rx_failed <= 1'b0;
rx_write_delayed <= 1'b1;
end
end
if ((state == STATE_DATA) && (cmd == CMD_READ) && phase[3]) begin
rx_wdata <= ft_miosi_in;
last_rx_failed <= !ft_miso && rx_full;
end
if ((state == STATE_DATA) && (cmd == CMD_WRITE) && phase[3]) begin
last_tx_failed <= ft_miso;
end
@ -262,8 +232,6 @@ module usb_ft1248 (
rx_write = 1'b0;
tx_read = 1'b0;
rx_wdata = ft_miosi_in;
if (!ft_miso && phase[3]) begin
case (state)
STATE_STATUS: begin
@ -273,13 +241,15 @@ module usb_ft1248 (
end
STATE_DATA: begin
if (cmd == CMD_READ) begin
if (cmd == CMD_READ && !rx_full) begin
rx_write = 1'b1;
end
if (cmd == CMD_WRITE && !tx_empty) begin
tx_read = 1'b1;
end
end
default: begin end
endcase
end
end
@ -340,7 +310,7 @@ module usb_ft1248 (
if (ft_miso) begin
next_state = STATE_DESELECT;
end else if (cmd == CMD_READ) begin
if (rx_almost_full) begin
if (rx_full) begin
next_state = STATE_DESELECT;
end
end else if (cmd == CMD_WRITE) begin

37
fw/rtl/usb/usb_scb.sv Normal file
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@ -0,0 +1,37 @@
interface usb_scb ();
logic fifo_flush;
logic fifo_flush_busy;
logic write_buffer_flush;
logic [10:0] rx_count;
logic [10:0] tx_count;
logic pwrsav;
logic reset_state;
logic reset_on_ack;
logic reset_off_ack;
modport controller (
output fifo_flush,
input fifo_flush_busy,
output write_buffer_flush,
input rx_count,
input tx_count,
input pwrsav,
input reset_state,
output reset_on_ack,
output reset_off_ack
);
modport usb (
input fifo_flush,
output fifo_flush_busy,
input write_buffer_flush,
output rx_count,
output tx_count,
output pwrsav,
output reset_state,
input reset_on_ack,
input reset_off_ack
);
endinterface

5
fw/rtl/vendor/lcmxo2/fifo_8kb.sv
View File

@ -3,18 +3,19 @@ module fifo_8kb (
input reset,
output empty,
output almost_empty,
input read,
output [7:0] rdata,
output full,
output almost_full,
input write,
input [7:0] wdata,
output logic [10:0] count
);
logic almost_empty;
logic almost_full;
fifo_8kb_lattice_generated fifo_8kb_lattice_generated_inst (
.Data(wdata),
.WrClock(clk),

1
fw/tests/.gitignore vendored Normal file
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@ -0,0 +1 @@
/build

35
fw/tests/Makefile Normal file
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@ -0,0 +1,35 @@
RTL_DIR = ../rtl
BENCHES_DIR = benches
MOCKS_DIR = mocks
BUILD_DIR = build
SRC_DIRS = \
$(RTL_DIR)/fifo \
$(RTL_DIR)/mcu \
$(RTL_DIR)/memory \
$(RTL_DIR)/n64 \
$(RTL_DIR)/sd \
$(RTL_DIR)/serv \
$(RTL_DIR)/usb \
$(RTL_DIR)/vendor \
$(RTL_DIR) \
$(MOCKS_DIR)/vendor \
$(MOCKS_DIR)
INC_DIRS = $(addprefix -I, $(SRC_DIRS))
TEST_FILES = $(shell find "./$(BENCHES_DIR)" -not -path "$(BUILD_DIR)/*" -type f -name "*_tb.sv")
TESTS = $(addprefix $(BUILD_DIR)/, $(basename $(TEST_FILES)))
VERILATOR_FLAGS = --binary --trace --timescale 10ns/1ns -j --quiet $(INC_DIRS)
$(BUILD_DIR)/%: %.sv
@echo "[VERILATOR] $<"
@mkdir -p $@.obj
@verilator $(VERILATOR_FLAGS) -Mdir $@.obj $< > /dev/null
@$@.obj/V$(notdir $@)
tests: $(TESTS)
clean:
@rm -rf ./$(BUILD_DIR)
.PHONY: tests

126
fw/tests/benches/memory_dma_tb.sv Normal file
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@ -0,0 +1,126 @@
module memory_dma_tb;
logic clk;
logic reset;
dma_scb dma_scb ();
fifo_bus fifo_bus ();
mem_bus mem_bus ();
logic start;
logic stop;
logic direction;
logic byte_swap;
logic [26:0] starting_address;
logic [26:0] transfer_length;
logic flush;
logic rx_fill_enabled;
logic tx_drain_enabled;
memory_dma memory_dma (
.clk(clk),
.reset(reset),
.dma_scb(dma_scb),
.fifo_bus(fifo_bus),
.mem_bus(mem_bus)
);
dma_controller_mock dma_controller_mock (
.clk(clk),
.reset(reset),
.dma_scb(dma_scb),
.start(start),
.stop(stop),
.direction(direction),
.byte_swap(byte_swap),
.starting_address(starting_address),
.transfer_length(transfer_length)
);
fifo_bus_fifo_mock #(
.DEPTH(8),
.FILL_RATE(3),
.DRAIN_RATE(3)
) fifo_bus_fifo_mock (
.clk(clk),
.reset(reset),
.fifo_bus(fifo_bus),
.flush(flush),
.rx_fill_enabled(rx_fill_enabled),
.tx_drain_enabled(tx_drain_enabled)
);
memory_sdram_mock memory_sdram_mock (
.clk(clk),
.reset(reset),
.mem_bus(mem_bus)
);
initial begin
clk = 1'b0;
forever begin
clk = ~clk; #0.5;
end
end
initial begin
reset = 1'b0;
#10;
reset = 1'b1;
#10;
reset = 1'b0;
end
initial begin
$dumpfile("traces/memory_dma_tb.vcd");
#10000;
$dumpvars();
#100;
start = 1'b1;
direction = 1'b0;
byte_swap = 1'b0;
starting_address = 27'hFFF1;
transfer_length = 27'd64;
#1;
start = 1'b0;
#9;
tx_drain_enabled = 1'b1;
#490;
stop = 1'b1;
#1;
stop = 1'b0;
#165;
start = 1'b1;
direction = 1'b1;
#1;
start = 1'b0;
#9;
rx_fill_enabled = 1'b1;
#490;
stop = 1'b1;
#1;
stop = 1'b0;
#99;
$finish;
end
endmodule

119
fw/tests/benches/usb_ft1248_tb.sv Normal file
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@ -0,0 +1,119 @@
module usb_ft1248_tb;
logic clk;
logic reset;
usb_scb usb_scb ();
fifo_bus fifo_bus ();
logic usb_pwrsav;
logic usb_clk;
logic usb_cs;
logic usb_miso;
logic [7:0] usb_miosi;
usb_ft1248 usb_ft1248 (
.clk(clk),
.reset(reset),
.usb_scb(usb_scb),
.fifo_bus(fifo_bus),
.usb_pwrsav(usb_pwrsav),
.usb_clk(usb_clk),
.usb_cs(usb_cs),
.usb_miso(usb_miso),
.usb_miosi(usb_miosi)
);
initial begin
clk = 1'b0;
forever begin
clk = ~clk; #0.5;
end
end
initial begin
reset = 1'b1;
#10;
reset = 1'b0;
end
initial begin
$dumpfile("traces/usb_ft1248_tb.vcd");
$dumpvars();
usb_pwrsav = 1'b1;
usb_miso = 1'b1;
#100;
fifo_bus.tx_write = 1'b1;
#100;
fifo_bus.tx_write = 1'b0;
#103;
usb_miso = 1'b0;
#80;
usb_scb.write_buffer_flush = 1'b1;
#1;
usb_scb.write_buffer_flush = 1'b0;
#20;
usb_miso = 1'b1;
#26;
usb_miso = 1'b0;
#4430;
usb_miso = 1'b1;
#13;
usb_miso = 1'b0;
#79;
fifo_bus.rx_read = 1'b1;
#1;
fifo_bus.rx_read = 1'b0;
#10;
fifo_bus.rx_read = 1'b1;
#1;
fifo_bus.rx_read = 1'b0;
#80;
fifo_bus.rx_read = 1'b1;
#1;
fifo_bus.rx_read = 1'b0;
#200;
usb_scb.reset_on_ack = 1'b1;
#1;
usb_scb.reset_on_ack = 1'b0;
#200;
usb_scb.reset_off_ack = 1'b1;
#1;
usb_scb.reset_off_ack = 1'b0;
#200;
usb_scb.fifo_flush = 1'b1;
#1;
usb_scb.fifo_flush = 1'b0;
#3000;
usb_scb.fifo_flush = 1'b1;
#1;
usb_scb.fifo_flush = 1'b0;
#6000;
$finish;
end
endmodule

22
fw/tests/docker_run.sh Executable file
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@ -0,0 +1,22 @@
#!/bin/bash
pushd $(dirname $0) > /dev/null
docker run \
-it \
--rm \
--user $(id -u):$(id -g) \
-v "$(pwd)":/work \
-v "$(pwd)/../rtl":/rtl \
-e CCACHE_DIR=/tmp/ccache \
--entrypoint /bin/bash \
verilator/verilator:latest \
-c "make -j"
BUILD_ERROR=$?
popd > /dev/null
if [ $BUILD_ERROR -ne 0 ]; then
exit -1
fi

39
fw/tests/mocks/dma_controller_mock.sv Normal file
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@ -0,0 +1,39 @@
module dma_controller_mock (
input clk,
input reset,
dma_scb.controller dma_scb,
input start,
input stop,
input direction,
input byte_swap,
input [26:0] starting_address,
input [26:0] transfer_length
);
always_ff @(posedge clk) begin
dma_scb.start <= 1'b0;
dma_scb.stop <= 1'b0;
if (reset) begin
dma_scb.direction <= 1'b0;
dma_scb.byte_swap <= 1'b0;
dma_scb.starting_address <= 27'd0;
dma_scb.transfer_length <= 27'd0;
end else begin
if (start) begin
dma_scb.start <= 1'b1;
dma_scb.direction <= direction;
dma_scb.byte_swap <= byte_swap;
dma_scb.starting_address <= starting_address;
dma_scb.transfer_length <= transfer_length;
end
if (stop) begin
dma_scb.stop <= 1'b1;
end
end
end
endmodule

145
fw/tests/mocks/fifo_bus_fifo_mock.sv Normal file
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@ -0,0 +1,145 @@
module fifo_bus_fifo_mock #(
parameter int DEPTH = 1024,
parameter int FILL_RATE = 3,
parameter int DRAIN_RATE = 3
) (
input clk,
input reset,
fifo_bus.fifo fifo_bus,
input flush,
input rx_fill_enabled,
input tx_drain_enabled
);
localparam int PTR_BITS = $clog2(DEPTH);
// RX FIFO mock
logic rx_full;
logic rx_write;
logic [7:0] rx_wdata;
logic [PTR_BITS:0] rx_count;
fifo_mock #(
.DEPTH(DEPTH)
) fifo_rx (
.clk(clk),
.reset(reset),
.empty(fifo_bus.rx_empty),
.read(fifo_bus.rx_read),
.rdata(fifo_bus.rx_rdata),
.full(rx_full),
.write(rx_write),
.wdata(rx_wdata),
.count(rx_count)
);
localparam int FILL_BITS = $clog2(FILL_RATE);
logic [FILL_BITS:0] fill_counter;
logic rx_fill;
always_ff @(posedge clk) begin
rx_fill <= rx_fill_enabled;
end
generate;
if (FILL_RATE == 0) begin
always_comb begin
rx_write = rx_fill && !rx_full;
end
end else begin
always_comb begin
rx_write = rx_fill && !rx_full && (fill_counter == (FILL_BITS + 1)'(FILL_RATE));
end
always_ff @(posedge clk) begin
if (fill_counter < (FILL_BITS + 1)'(FILL_RATE)) begin
fill_counter <= fill_counter + (FILL_BITS + 1)'('d1);
end
if (reset) begin
fill_counter <= (FILL_BITS + 1)'('d0);
end else begin
if (rx_write) begin
fill_counter <= (FILL_BITS + 1)'('d0);
end
end
end
end
endgenerate
always_ff @(posedge clk) begin
if (reset) begin
rx_wdata <= 8'h01;
end else begin
if (rx_write) begin
rx_wdata <= rx_wdata + 8'h01;
end
end
end
// TX FIFO mock
logic tx_empty;
logic tx_read;
logic [7:0] tx_rdata;
logic [PTR_BITS:0] tx_count;
fifo_mock #(
.DEPTH(DEPTH)
) fifo_tx (
.clk(clk),
.reset(reset),
.empty(tx_empty),
.read(tx_read),
.rdata(tx_rdata),
.full(fifo_bus.tx_full),
.write(fifo_bus.tx_write),
.wdata(fifo_bus.tx_wdata),
.count(tx_count)
);
localparam int DRAIN_BITS = $clog2(DRAIN_RATE);
logic [DRAIN_BITS:0] drain_counter;
logic tx_drain;
always_ff @(posedge clk) begin
tx_drain <= tx_drain_enabled;
end
generate;
if (DRAIN_RATE == 0) begin
always_comb begin
tx_read = tx_drain && !tx_empty;
end
end else begin
always_comb begin
tx_read = tx_drain && !tx_empty && (drain_counter == (DRAIN_BITS + 1)'(DRAIN_RATE));
end
always_ff @(posedge clk) begin
if (drain_counter < (DRAIN_BITS + 1)'(DRAIN_RATE)) begin
drain_counter <= drain_counter + (DRAIN_BITS + 1)'('d1);
end
if (reset) begin
drain_counter <= (DRAIN_BITS + 1)'('d0);
end else begin
if (tx_read) begin
drain_counter <= (DRAIN_BITS + 1)'('d0);
end
end
end
end
endgenerate
endmodule

49
fw/tests/mocks/fifo_mock.sv Normal file
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@ -0,0 +1,49 @@
module fifo_mock #(
parameter int DEPTH = 1024,
localparam int PTR_BITS = $clog2(DEPTH)
) (
input clk,
input reset,
output logic empty,
input read,
output [7:0] rdata,
output logic full,
input write,
input [7:0] wdata,
output logic [PTR_BITS:0] count
);
logic [7:0] fifo_mem [0:(DEPTH - 1)];
logic [(PTR_BITS - 1):0] fifo_rptr;
logic [(PTR_BITS - 1):0] fifo_wptr;
always_comb begin
full = count >= (PTR_BITS + 1)'(DEPTH);
empty = count == (PTR_BITS + 1)'('d0);
end
always_ff @(posedge clk) begin
if (read) begin
rdata <= fifo_mem[fifo_rptr];
fifo_rptr <= fifo_rptr + PTR_BITS'('d1);
count <= count - (PTR_BITS + 1)'('d1);
end
if (write) begin
fifo_mem[fifo_wptr] <= wdata;
fifo_wptr <= fifo_wptr + PTR_BITS'('d1);
count <= count + (PTR_BITS + 1)'('d1);
end
if (read && write) begin
count <= count;
end
if (reset) begin
count <= (PTR_BITS + 1)'('d0);
fifo_rptr <= PTR_BITS'('d0);
fifo_wptr <= PTR_BITS'('d0);
end
end
endmodule

70
fw/tests/mocks/memory_sdram_mock.sv Normal file
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@ -0,0 +1,70 @@
module memory_sdram_mock (
input clk,
input reset,
mem_bus.memory mem_bus
);
logic sdram_cs;
logic sdram_ras;
logic sdram_cas;
logic sdram_we;
logic [1:0] sdram_ba;
logic [12:0] sdram_a;
logic [1:0] sdram_dqm;
logic [15:0] sdram_dq;
memory_sdram memory_sdram_inst (
.clk(clk),
.reset(reset),
.mem_bus(mem_bus),
.sdram_cs(sdram_cs),
.sdram_ras(sdram_ras),
.sdram_cas(sdram_cas),
.sdram_we(sdram_we),
.sdram_ba(sdram_ba),
.sdram_a(sdram_a),
.sdram_dqm(sdram_dqm),
.sdram_dq(sdram_dq)
);
logic [1:0] cas_delay;
logic [15:0] data_from_sdram;
logic [15:0] data_to_sdram;
logic [15:0] sdram_dq_driven;
assign sdram_dq = sdram_dq_driven;
always_ff @(posedge clk) begin
if (reset) begin
cas_delay <= 2'b00;
data_from_sdram <= 16'h0102;
data_to_sdram <= 16'hFFFF;
end else begin
cas_delay <= {cas_delay[0], 1'b0};
if ({sdram_cs, sdram_ras, sdram_cas, sdram_we} == 4'b0101) begin
cas_delay[0] <= 1'b1;
end
if (cas_delay[1]) begin
data_from_sdram <= data_from_sdram + 16'h0202;
end
if ({sdram_cs, sdram_ras, sdram_cas, sdram_we} == 4'b0100) begin
if (!sdram_dqm[0]) data_to_sdram[7:0] <= sdram_dq[7:0];
if (!sdram_dqm[1]) data_to_sdram[15:8] <= sdram_dq[15:8];
end
end
end
always_comb begin
sdram_dq_driven = 16'hXXXX;
if (cas_delay[1]) begin
sdram_dq_driven = data_from_sdram;
end
end
endmodule

33
fw/tests/mocks/vendor/fifo_8kb.sv vendored Normal file
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@ -0,0 +1,33 @@
module fifo_8kb (
input clk,
input reset,
output empty,
input read,
output [7:0] rdata,
output full,
input write,
input [7:0] wdata,
output logic [10:0] count
);
fifo_mock #(
.DEPTH(1024)
) fifo_8kb (
.clk(clk),
.reset(reset),
.empty(empty),
.read(read),
.rdata(rdata),
.full(full),
.write(write),
.wdata(wdata),
.count(count)
);
endmodule

2
fw/tests/traces/.gitignore vendored Normal file
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@ -0,0 +1,2 @@
*.vcd
*.gtkw

3
sw/controller/src/usb.c
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@ -201,6 +201,9 @@ static bool usb_dma_ready (void) {
}
static bool usb_validate_address_length (uint32_t address, uint32_t length, bool exclude_bootloader) {
if (length == 0) {
return true;
}
if ((address >= MEMORY_LENGTH) || (length > MEMORY_LENGTH)) {
return true;
}

2
sw/deployer/src/sc64/ftdi.rs
View File

@ -486,7 +486,7 @@ impl FtdiDevice {
wrapper.set_module_detach_mode(ModuleDetachMode::AutoDetachReattach);
wrapper.set_interface(InterfaceIndex::A)?;
const CHUNK_SIZE: usize = 16 * 1024;
const CHUNK_SIZE: usize = 2 * 1024 * 1024;
wrapper.read_data_set_chunksize(CHUNK_SIZE)?;
wrapper.write_data_set_chunksize(CHUNK_SIZE)?;