diff options
| -rw-r--r-- | atk16_fpga/.gitignore | 1 | ||||
| -rw-r--r-- | atk16_fpga/Makefile | 5 | ||||
| -rwxr-xr-x | atk16_fpga/gen_data_strings_v.py | 25 | ||||
| -rw-r--r-- | atk16_fpga/hardware.dot | 70 | ||||
| -rw-r--r-- | atk16_fpga/hardware.svg | 463 | ||||
| -rw-r--r-- | atk16_fpga/top.v | 131 |
6 files changed, 667 insertions, 28 deletions
diff --git a/atk16_fpga/.gitignore b/atk16_fpga/.gitignore index bba1e09..5fdef91 100644 --- a/atk16_fpga/.gitignore +++ b/atk16_fpga/.gitignore @@ -4,3 +4,4 @@ *.out *.vcd *.dblite +data_strings.v diff --git a/atk16_fpga/Makefile b/atk16_fpga/Makefile index cada068..2a7e495 100644 --- a/atk16_fpga/Makefile +++ b/atk16_fpga/Makefile @@ -1,6 +1,9 @@ BIN ?= program.bin -hardware.bin: top.v +data_strings.v: gen_data_strings_v.py + python gen_data_strings_v.py > data_strings.v + +hardware.bin: top.v data_strings.v apio verify apio test apio build diff --git a/atk16_fpga/gen_data_strings_v.py b/atk16_fpga/gen_data_strings_v.py new file mode 100755 index 0000000..afb374e --- /dev/null +++ b/atk16_fpga/gen_data_strings_v.py @@ -0,0 +1,25 @@ +#!/usr/bin/env python + +def gen(name, message): + for line in message.split('\n'): + print(f'// {line}') + + print(f"`define LEN_{name} {len(message)}") + print(f"`define STR_{name} \\") + print(f" reg [7:0] str_{name} [0:`LEN_{name}-1]; \\") + print(f" initial begin \\") + for i, c in enumerate(message): + print(f" str_{name}[{i}] = 8'd{ord(c)}; \\") + + print(f" end") + print("") + +gen("welcome", "Welcome to the ATK16 serial programmer. Press 'h' for help.\n") +gen("help", + "Help:\n" + + " h - help\n" + + " p - program\n" +) +gen("program_ready", + "Ready to receive program data. Reset device after transmission.\n" +) diff --git a/atk16_fpga/hardware.dot b/atk16_fpga/hardware.dot new file mode 100644 index 0000000..e1f4c58 --- /dev/null +++ b/atk16_fpga/hardware.dot @@ -0,0 +1,70 @@ +digraph "top" { +label="top"; +rankdir="LR"; +remincross=true; +n13 [ shape=diamond, label="rx_done", color="black", fontcolor="black" ]; +n14 [ shape=diamond, label="data_to_receive", color="black", fontcolor="black" ]; +n15 [ shape=diamond, label="state", color="black", fontcolor="black" ]; +n16 [ shape=diamond, label="letter_a", color="black", fontcolor="black" ]; +n17 [ shape=diamond, label="tx_busy", color="black", fontcolor="black" ]; +n18 [ shape=diamond, label="data_to_send", color="black", fontcolor="black" ]; +n19 [ shape=diamond, label="start_tx", color="black", fontcolor="black" ]; +n20 [ shape=octagon, label="LED2", color="black", fontcolor="black" ]; +n21 [ shape=octagon, label="LED1", color="black", fontcolor="black" ]; +n22 [ shape=octagon, label="SERIAL_TX", 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+<text text-anchor="middle" x="300" y="-196.7" font-family="Times,serif" font-size="14.00">Y</text> +</g> +<!-- n17->c41 --> +<g id="edge14" class="edge"> +<title>n17:e->c41:w</title> +<path fill="none" stroke="#1b9e77" d="M116.29,-141.5C153.27,-141.5 147.35,-190.13 175.61,-200.01"/> +<polygon fill="#1b9e77" stroke="#1b9e77" points="174.7,-203.41 185.13,-201.51 175.79,-196.5 174.7,-203.41"/> +</g> +<!-- n18 --> +<g id="node6" class="node"> +<title>n18</title> +<polygon fill="none" stroke="black" points="647.65,-246.5 563.45,-228.5 647.65,-210.5 731.86,-228.5 647.65,-246.5"/> +<text text-anchor="middle" x="647.65" y="-223.45" font-family="Times,serif" font-size="14.00">data_to_send</text> +</g> +<!-- n18->c39 --> +<g id="edge17" class="edge"> +<title>n18:e->c39:w</title> +<path fill="none" stroke="#1b9e77" stroke-width="3" d="M731.86,-228.5C747.97,-228.5 748.23,-210.55 757.16,-202.42"/> +<polygon fill="#1b9e77" stroke="#1b9e77" stroke-width="3" points="755.41,-206.79 763.59,-200.06 753,-200.22 755.41,-206.79"/> +</g> +<!-- n18->p6 --> +<g id="edge18" class="edge"> +<title>n18:e->p6:w</title> +<path fill="none" stroke="#1b9e77" stroke-width="3" d="M734.95,-228.5C742.97,-228.5 739.61,-240.83 733.95,-246.5 720.56,-259.94 582.08,-252.87 563.45,-256.5 536.91,-261.67 532.51,-271.61 505.83,-276 483.9,-279.61 421.92,-291.33 405.83,-276 403.14,-273.44 400.97,-269.58 399.95,-265.9"/> +<polygon fill="#1b9e77" stroke="#1b9e77" stroke-width="3" points="401.82,-270.15 402.9,-259.61 395.48,-267.17 401.82,-270.15"/> +</g> +<!-- n19 --> +<g id="node7" class="node"> +<title>n19</title> +<polygon fill="none" stroke="black" points="647.65,-192.5 593.13,-174.5 647.65,-156.5 702.18,-174.5 647.65,-192.5"/> +<text text-anchor="middle" x="647.65" y="-169.45" font-family="Times,serif" font-size="14.00">start_tx</text> +</g> +<!-- n19->c39 --> +<g id="edge21" class="edge"> +<title>n19:e->c39:w</title> +<path fill="none" stroke="#e6ab02" d="M704.54,-174.5C728.5,-174.5 737.16,-174.14 756.58,-174.03"/> +<polygon fill="#e6ab02" stroke="#e6ab02" points="756.35,-177.53 766.34,-174 756.33,-170.53 756.35,-177.53"/> +</g> +<!-- n19->p6 --> +<g id="edge22" class="edge"> +<title>n19:e->p6:w</title> +<path fill="none" stroke="#e6ab02" d="M704.54,-174.5C712.55,-174.5 709.18,-186.81 703.54,-192.5 681.58,-214.65 591,-186.87 563.45,-201.5 526.48,-221.14 543.41,-257.56 505.83,-276 485.88,-285.79 421.92,-291.33 405.83,-276 403.14,-273.44 400.97,-269.58 399.95,-265.9"/> +<polygon fill="#e6ab02" stroke="#e6ab02" points="403.1,-267.41 404.18,-256.87 396.77,-264.43 403.1,-267.41"/> +</g> +<!-- n20 --> +<g id="node8" class="node"> +<title>n20</title> +<polygon fill="none" stroke="black" points="1148.73,-614.04 1148.73,-628.96 1127.53,-639.5 1097.54,-639.5 1076.34,-628.96 1076.34,-614.04 1097.54,-603.5 1127.53,-603.5 1148.73,-614.04"/> +<text text-anchor="middle" x="1112.54" y="-616.45" font-family="Times,serif" font-size="14.00">LED2</text> +</g> +<!-- n21 --> +<g id="node9" class="node"> +<title>n21</title> +<polygon fill="none" stroke="black" points="1000.74,-614.04 1000.74,-628.96 979.54,-639.5 949.56,-639.5 928.36,-628.96 928.36,-614.04 949.56,-603.5 979.54,-603.5 1000.74,-614.04"/> +<text text-anchor="middle" x="964.55" y="-616.45" font-family="Times,serif" font-size="14.00">LED1</text> +</g> +<!-- x8 --> +<g id="node28" class="node"> +<title>x8</title> +<ellipse fill="black" stroke="black" cx="1038.54" cy="-621.5" rx="1.8" ry="1.8"/> +</g> +<!-- n21->x8 --> +<g id="edge25" class="edge"> +<title>n21:e->x8:w</title> +<path fill="none" stroke="#d95f02" d="M1000.74,-621.5C1012.12,-621.5 1017.43,-621.5 1025.3,-621.5"/> +<polygon fill="#d95f02" stroke="#d95f02" points="1025.23,-625 1035.23,-621.5 1025.23,-618 1025.23,-625"/> +</g> +<!-- n22 --> +<g id="node10" class="node"> +<title>n22</title> +<polygon fill="none" stroke="black" points="712.65,-35.04 712.65,-49.96 674.58,-60.5 620.73,-60.5 582.65,-49.96 582.65,-35.04 620.73,-24.5 674.58,-24.5 712.65,-35.04"/> +<text text-anchor="middle" x="647.65" y="-37.45" font-family="Times,serif" font-size="14.00">SERIAL_TX</text> +</g> +<!-- n22->c39 --> +<g id="edge26" class="edge"> +<title>n22:e->c39:w</title> +<path fill="none" stroke="#d95f02" d="M713.93,-42.5C762.81,-42.5 722.52,-132.67 756.77,-147.46"/> +<polygon fill="#d95f02" stroke="#d95f02" points="755.9,-150.86 766.37,-149.23 757.17,-143.97 755.9,-150.86"/> +</g> +<!-- n23 --> +<g id="node11" class="node"> +<title>n23</title> +<polygon fill="none" stroke="black" points="315.8,-403.04 315.8,-417.96 277.4,-428.5 223.09,-428.5 184.69,-417.96 184.69,-403.04 223.09,-392.5 277.4,-392.5 315.8,-403.04"/> +<text text-anchor="middle" x="250.25" y="-405.45" font-family="Times,serif" font-size="14.00">SERIAL_RX</text> +</g> +<!-- n23->c35 --> +<g id="edge27" class="edge"> +<title>n23:e->c35:w</title> +<path fill="none" stroke="#1b9e77" d="M317.08,-410.5C342.83,-410.5 351.76,-415.12 372.78,-416.41"/> +<polygon fill="#1b9e77" stroke="#1b9e77" points="372.59,-419.91 382.69,-416.71 372.8,-412.91 372.59,-419.91"/> +</g> +<!-- n24 --> +<g id="node12" class="node"> +<title>n24</title> +<polygon fill="none" stroke="black" points="300.29,-349.04 300.29,-363.96 270.97,-374.5 229.52,-374.5 200.2,-363.96 200.2,-349.04 229.52,-338.5 270.97,-338.5 300.29,-349.04"/> +<text text-anchor="middle" x="250.25" y="-351.45" font-family="Times,serif" font-size="14.00">SYSCLK</text> +</g> +<!-- n24->c35 --> +<g id="edge28" class="edge"> +<title>n24:e->c35:w</title> +<path fill="none" stroke="#1b9e77" d="M301.76,-356.5C325.63,-356.5 333.1,-365.01 348.2,-383.5 377.02,-418.8 341.73,-478.27 372.9,-488.67"/> +<polygon fill="#1b9e77" stroke="#1b9e77" points="372.32,-492.13 382.7,-490.04 373.28,-485.19 372.32,-492.13"/> +</g> +<!-- n24->c39 --> +<g id="edge29" class="edge"> +<title>n24:e->c39:w</title> +<path fill="none" stroke="#1b9e77" d="M301.76,-356.5C494.05,-356.5 581.49,-429.36 731.86,-309.5 760.73,-286.48 733.96,-236.27 756.56,-225.19"/> +<polygon fill="#1b9e77" stroke="#1b9e77" points="757.22,-228.63 766.37,-223.29 755.89,-221.76 757.22,-228.63"/> +</g> +<!-- n24->p6 --> +<g id="edge30" class="edge"> +<title>n24:e->p6:w</title> +<path fill="none" stroke="#1b9e77" d="M301.76,-356.5C325.63,-356.5 330.28,-345.28 348.2,-329.5 376,-305.01 366.24,-265.12 393.51,-256.98"/> +<polygon fill="#1b9e77" stroke="#1b9e77" points="393.86,-260.46 403.33,-255.7 392.96,-253.52 393.86,-260.46"/> +</g> +<!-- v0 --> +<g id="node13" class="node"> +<title>v0</title> +<ellipse fill="none" stroke="black" cx="455.83" cy="-621.5" rx="27" ry="18"/> +<text text-anchor="middle" x="455.83" y="-616.45" font-family="Times,serif" font-size="14.00">1</text> +</g> +<!-- c29 --> +<g id="node15" class="node"> +<title>c29</title> +<polygon fill="none" stroke="black" points="598.15,-584.75 598.15,-658.25 697.15,-658.25 697.15,-584.75 598.15,-584.75"/> +<text text-anchor="middle" x="611.03" y="-640.95" font-family="Times,serif" font-size="14.00">A</text> +<polyline fill="none" stroke="black" points="598.15,-633.75 623.9,-633.75"/> +<text text-anchor="middle" x="611.03" y="-616.45" font-family="Times,serif" font-size="14.00">B</text> +<polyline fill="none" stroke="black" points="598.15,-609.25 623.9,-609.25"/> +<text text-anchor="middle" x="611.03" y="-591.95" font-family="Times,serif" font-size="14.00">S</text> +<polyline fill="none" stroke="black" points="623.9,-584.75 623.9,-658.25"/> +<text text-anchor="middle" x="647.65" y="-624.7" font-family="Times,serif" font-size="14.00">$6</text> +<text text-anchor="middle" x="647.65" y="-608.2" font-family="Times,serif" font-size="14.00">$mux</text> +<polyline fill="none" stroke="black" points="671.4,-584.75 671.4,-658.25"/> +<text text-anchor="middle" x="684.28" y="-616.45" font-family="Times,serif" font-size="14.00">Y</text> +</g> +<!-- v0->c29 --> +<g id="edge36" class="edge"> +<title>v0:e->c29:w</title> +<path fill="none" stroke="#66a61e" stroke-width="3" d="M484.08,-621.5C530.31,-621.5 544.65,-621.5 585.77,-621.5"/> +<polygon fill="#66a61e" stroke="#66a61e" stroke-width="3" points="582.61,-625 592.61,-621.5 582.61,-618 582.61,-625"/> +</g> +<!-- v1 --> +<g id="node14" class="node"> +<title>v1</title> +<ellipse fill="none" stroke="black" cx="455.83" cy="-675.5" rx="27" ry="18"/> +<text text-anchor="middle" x="455.83" y="-670.45" font-family="Times,serif" font-size="14.00">0</text> +</g> +<!-- v1->c29 --> +<g id="edge37" class="edge"> +<title>v1:e->c29:w</title> +<path fill="none" stroke="#a6761d" stroke-width="3" d="M484.08,-675.5C531.96,-675.5 543.52,-650.43 585.72,-646.51"/> +<polygon fill="#a6761d" stroke="#a6761d" stroke-width="3" points="582.78,-650.15 592.62,-646.2 582.47,-643.15 582.78,-650.15"/> +</g> +<!-- x7 --> +<g id="node27" class="node"> +<title>x7</title> +<path fill="none" stroke="#666666" d="M810.86,-603.5C810.86,-603.5 849.36,-603.5 849.36,-603.5 855.36,-603.5 861.36,-609.5 861.36,-615.5 861.36,-615.5 861.36,-627.5 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c40->p6 --> +<g id="edge33" class="edge"> +<title>c40:e->p6:w</title> +<path fill="none" stroke="#a6761d" d="M313.87,-141.75C374.43,-141.75 344.63,-241.31 393.54,-254.14"/> +<polygon fill="#a6761d" stroke="#a6761d" points="392.98,-257.6 403.32,-255.32 393.81,-250.65 392.98,-257.6"/> +</g> +<!-- c41->p6 --> +<g id="edge34" class="edge"> +<title>c41:e->p6:w</title> +<path fill="none" stroke="#e6ab02" d="M313.87,-201.75C356.79,-201.75 358.01,-246.66 393.76,-254.38"/> +<polygon fill="#e6ab02" stroke="#e6ab02" points="393.02,-257.82 403.32,-255.35 393.73,-250.86 393.02,-257.82"/> +</g> +<!-- c42->p6 --> +<g id="edge35" class="edge"> +<title>c42:e->p6:w</title> +<path fill="none" stroke="#1b9e77" d="M313.87,-299.75C354.79,-299.75 359.33,-263.09 393.71,-256.51"/> +<polygon fill="#1b9e77" stroke="#1b9e77" points="393.68,-260.02 403.32,-255.64 393.04,-253.05 393.68,-260.02"/> +</g> +<!-- p2 --> +<g id="node22" class="node"> +<title>p2</title> +<path fill="none" stroke="black" d="M500.58,-335C500.58,-335 411.08,-335 411.08,-335 405.08,-335 399.08,-329 399.08,-323 399.08,-323 399.08,-306 399.08,-306 399.08,-300 405.08,-294 411.08,-294 411.08,-294 500.58,-294 500.58,-294 506.58,-294 512.58,-300 512.58,-306 512.58,-306 512.58,-323 512.58,-323 512.58,-329 506.58,-335 500.58,-335"/> +<text text-anchor="middle" x="455.83" y="-317.7" font-family="Times,serif" font-size="14.00">PROC $10</text> +<text text-anchor="middle" x="455.83" y="-301.2" font-family="Times,serif" font-size="14.00">top.v:28.15-28.35</text> +</g> +<!-- p2->n15 --> +<g id="edge7" class="edge"> +<title>p2:e->n15:w</title> +<path fill="none" stroke="#7570b3" stroke-width="3" d="M513.58,-314.5C553.03,-314.5 561.25,-288.22 594.84,-283.29"/> +<polygon fill="#7570b3" stroke="#7570b3" stroke-width="3" points="591.88,-287.01 601.61,-282.82 591.39,-280.02 591.88,-287.01"/> +</g> +<!-- p3 --> +<g id="node23" class="node"> +<title>p3</title> +<path fill="none" stroke="black" d="M102.9,-577C102.9,-577 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fill="none" stroke="#d95f02" d="M1040.34,-621.5C1051.72,-621.5 1057.03,-621.5 1064.9,-621.5"/> +<polygon fill="#d95f02" stroke="#d95f02" points="1064.83,-625 1074.83,-621.5 1064.83,-618 1064.83,-625"/> +</g> +</g> +</svg> diff --git a/atk16_fpga/top.v b/atk16_fpga/top.v index c67ade2..6fcbddd 100644 --- a/atk16_fpga/top.v +++ b/atk16_fpga/top.v @@ -9,28 +9,37 @@ module top ( output LED2 ); - // One-cycle pulse to trigger transmission. - reg start_tx = 1'b0; - // Data byte to be transmitted. - reg [7:0] data_to_send = 8'b0; - // Busy flag from the transmitter. - wire tx_busy; + // State machine states. + localparam RX_START = 0; + localparam WAIT_RX_DONE = 1; + localparam START_TX = 2; + localparam TX_IN_PROG = 3; + localparam WAIT_TX_DONE = 4; + localparam HANDLE_RX_DATA = 5; + localparam SEND_STRING_WELCOME = 6; + localparam SEND_STRING_HELP = 7; + localparam SEND_STRING_PROGRAM_READY = 8; + localparam RECEIVE_PROGRAM_DATA = 9; - reg [7:0] letter_a = 8'd97; + reg [7:0] state = SEND_STRING_WELCOME; - // State machine states. - localparam WAIT_RX_BUSY = 3'd0; - localparam WAIT_RX_DONE = 3'd1; - localparam START_TX_1 = 3'd2; - localparam START_TX_2 = 3'd3; - localparam WAIT_TX_DONE = 3'd4; + // SEND_WELCOME data + `STR_welcome + reg [7:0] welcome_index = 0; + + // SEND_STRING_HELP data + `STR_help + reg [7:0] help_index = 0; - reg [2:0] state = WAIT_RX_BUSY; + // SEND_STRING_PROGRAM_READY data + `STR_program_ready + reg [7:0] program_ready_index = 0; // Synchronous state machine with reset. always @(posedge SYSCLK) begin case (state) - WAIT_RX_BUSY: begin + // STATES FOR RX + RX_START: begin if (!rx_done) begin state <= WAIT_RX_DONE; end @@ -38,21 +47,20 @@ module top ( WAIT_RX_DONE: begin if (rx_done) begin - state <= START_TX_1; + state <= state_after_rx; end end - START_TX_1: begin + // STATES FOR TX + START_TX: begin if (!tx_busy) begin - //data_to_send <= letter_a; - data_to_send <= data_to_receive; start_tx <= 1'b1; // trigger transmission - state <= START_TX_2; + state <= TX_IN_PROG; end end // After issuing the start pulse, wait for tx_busy to go high. - START_TX_2: begin + TX_IN_PROG: begin start_tx <= 1'b0; // ensure pulse is only one cycle. state <= WAIT_TX_DONE; end @@ -60,35 +68,104 @@ module top ( // Wait for the transmitter to finish sending the byte. WAIT_TX_DONE: begin if (!tx_busy) begin - state <= WAIT_RX_BUSY; + state <= state_after_tx; end end - default: state <= WAIT_RX_BUSY; + // STATES FOR PROCESSING DATA + HANDLE_RX_DATA: begin + if (data_rx == cmd_program) begin + state <= SEND_STRING_PROGRAM_READY; + end else if (data_rx == cmd_help) begin + state <= SEND_STRING_HELP; + end else begin + state <= RX_START; + end + end + + SEND_STRING_WELCOME: begin + if (welcome_index < 8'd`LEN_welcome) begin + data_tx <= str_welcome[welcome_index]; + welcome_index <= welcome_index + 1; + state <= START_TX; + state_after_tx <= SEND_STRING_WELCOME; + end else begin + welcome_index <= 0; + state <= RX_START; + state_after_tx <= RX_START; + end + end + + SEND_STRING_HELP: begin + if (help_index < 8'd`LEN_help) begin + data_tx <= str_help[help_index]; + help_index <= help_index + 1; + state <= START_TX; + state_after_tx <= SEND_STRING_HELP; + end else begin + help_index <= 0; + state <= RX_START; + state_after_tx <= RX_START; + end + end + + SEND_STRING_PROGRAM_READY: begin + if (program_ready_index < 8'd`LEN_program_ready) begin + data_tx <= str_program_ready[program_ready_index]; + program_ready_index <= program_ready_index + 1; + state <= START_TX; + state_after_tx <= SEND_STRING_PROGRAM_READY; + end else begin + program_ready_index <= 0; + state <= RECEIVE_PROGRAM_DATA; + state_after_tx <= RX_START; + end + end + + RECEIVE_PROGRAM_DATA: begin + // TODO write data to flash + state <= RX_START; + state_after_rx <= RECEIVE_PROGRAM_DATA; + end + + default: state <= RX_START; endcase end + // One-cycle pulse to trigger transmission. + reg start_tx = 1'b0; + // Data byte to be transmitted. + reg [7:0] data_tx = 8'b0; + // Busy flag from the transmitter. + wire tx_busy; + // State to transition to after TX done. + reg [7:0] state_after_tx = RX_START; + + reg [7:0] cmd_help = 8'd104; // h + reg [7:0] cmd_program = 8'd112; // p + // Instantiate the UART transmitter. uart_tx uart_inst ( .clk (SYSCLK), .start(start_tx), // One-cycle pulse to start transmission. - .data (data_to_send), + .data (data_tx), .tx (SERIAL_TX), .busy (tx_busy) ); - wire [7:0] data_to_receive; + wire [7:0] data_rx; wire rx_done; + reg [7:0] state_after_rx = HANDLE_RX_DATA; uart_rx uart_rx_inst ( .clk (SYSCLK), .rx (SERIAL_RX), - .data(data_to_receive), + .data(data_rx), .done(rx_done) ); - assign LED1 = data_to_receive == letter_a ? 1 : 0; + assign LED1 = data_rx == cmd_program; assign LED2 = LED1; endmodule |
