feat: initial commit

.envrc

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+use flake

.gitignore

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+.direnv/

big-sign.py

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+import serial
+import sys
+import time
+
+PACKET_HEADER = b'\0\0\0\0\0\x01'
+SIGN_TYPE = b'Z'
+SIGN_ADDRESS = b'00'
+VALID_NAMES = b'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
+
+def encode_packet(command_code, data):
+    return PACKET_HEADER + SIGN_TYPE + SIGN_ADDRESS + b'\x02' + command_code + data + b'\x04'
+
+def generate_memory_config(files: list[tuple[bytes, int]]):
+    data = b'$'
+    for name, size in files:
+        if len(name) != 1:
+            raise ValueError()
+        if name not in VALID_NAMES:
+            raise ValueError()
+        data += name
+        data += b'AU'
+        data += hex(size).upper()[2:].encode().rjust(4, b'0')
+#        data += b'00FF'
+        data += b'FFFF'
+    return encode_packet(b'E', data)
+
+def generate_run_order(files: list[bytes]):
+    data = b'.TU'
+    for name in files:
+        if len(name) != 1:
+            raise ValueError()
+        if name not in VALID_NAMES:
+            raise ValueError()
+        data += name
+    return encode_packet(b'E', data)
+
+def generate_write_text_file(name: bytes, content: bytes):
+    return encode_packet(b'A', name + content)
+
+def main(args: list[str]):
+    if len(args) < 3:
+        print(f'Usage: {args[0]} <file> <serial>')
+        exit(1)
+    file_name = args[1]
+    serial_port = args[2]
+    with open(file_name) as f:
+        lines = f.readlines()
+    if len(lines) > len(VALID_NAMES):
+        print('Too many lines! I dont have enough files!')
+        exit(1)
+
+    run_order = []
+    files = []
+    text_packets = []
+
+    for file_name, line in zip(VALID_NAMES, lines):
+        file_name = bytes([file_name])
+        data = line.strip().encode()
+        length = len(data)
+        run_order.append(file_name)
+        files.append((file_name, length))
+        text_packets.append(generate_write_text_file(file_name, data))
+
+    with serial.Serial(serial_port, 9600) as ser:
+        print('Config memory')
+        ser.write(generate_memory_config(files))
+        print('+', generate_memory_config(files).hex())
+        time.sleep(1)
+        print('Send files')
+        for tp in text_packets:
+            ser.write(tp)
+            print('+', tp.hex())
+            time.sleep(1)
+        print('Send run order')
+        ser.write(generate_run_order(run_order))
+        print('+', generate_run_order(run_order).hex())
+        print('Done!')
+
+if __name__ == '__main__':
+    main(sys.argv)

flake.lock

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+{
+  "nodes": {
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1694529238,
+        "narHash": "sha256-zsNZZGTGnMOf9YpHKJqMSsa0dXbfmxeoJ7xHlrt+xmY=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "ff7b65b44d01cf9ba6a71320833626af21126384",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "nixpkgs": {
+      "locked": {
+        "lastModified": 1696261572,
+        "narHash": "sha256-s8TtSYJ1LBpuITXjbPLUPyxzAKw35LhETcajJjCS5f0=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "0c7ffbc66e6d78c50c38e717ec91a2a14e0622fb",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "root": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
+      }
+    }
+  },
+  "root": "root",
+  "version": 7
+}

flake.nix

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+{
+  inputs = {
+    nixpkgs.url = github:NixOS/nixpkgs/nixpkgs-unstable;
+    flake-utils.url = github:numtide/flake-utils;
+  };
+
+  outputs = { self, nixpkgs, flake-utils }:
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+        dependencies= ps: with ps; [
+          pyserial
+        ];
+      in
+    {
+      devShells.default = pkgs.mkShell {
+        nativeBuildInputs = with pkgs; [
+          (python311.withPackages dependencies)
+        ];
+      };
+    });
+}