Content import socket import display import uinterface import network import buttons import mch22 WIDTH = display.width() HEIGHT = display.height() SIZE = min(WIDTH, HEIGHT) X0 = (WIDTH - SIZE) // 2 Y0 = (HEIGHT - SIZE) // 2 GREEN = 0x00FF00 BLACK = 0x000000 PORT = 4444 # ------------------------------------------------------------ # VT01 coordinate conversion (12‑bit signed → screen pixels) # ------------------------------------------------------------ def vt_to_screen(x, y): # Convert VT01 coords (-2048..+2047) into 0..SIZE-1 sx = int((0.5 + x / 4096.0) * SIZE) sy = int((0.5 + y / 4096.0) * SIZE) # Center inside the display return X0 + sx, Y0 + sy # ------------------------------------------------------------ # VT01 protocol helpers # ------------------------------------------------------------ def read16(sock): data = sock.recv(2) if len(data) < 2: raise OSError("connection closed") lo = data[0] hi = data[1] bit12 = ((hi << 8) | lo) & 0xFFF return bit12 - 0x1000 if (bit12 & 0x800) else bit12 # ------------------------------------------------------------ # Drawing primitives mapped to MCH22 API # ------------------------------------------------------------ def erase(): display.drawFill(BLACK) display.flush() def draw_point(x, y): sx, sy = vt_to_screen(x, y) display.drawPixel(sx, sy, GREEN) def draw_line(x1, y1, x2, y2): sx1, sy1 = vt_to_screen(x1, y1) sx2, sy2 = vt_to_screen(x2, y2) display.drawLine(sx1, sy1, sx2, sy2, GREEN) # ------------------------------------------------------------ # Command handler # ------------------------------------------------------------ def command_handler(sock): while True: cmd = sock.recv(1) if not cmd: break cmd = cmd[0] # Printable ASCII passthrough if 0x20 <= cmd <= 0x7F or cmd in (0x0D, 0x0A): print(chr(cmd), end="") continue # Binary commands if cmd == 0x01: # ERASE erase() elif cmd == 0x02: # PLOT POINT x = read16(sock) y = read16(sock) draw_point(x, y) display.flush() elif cmd == 0x03: # DRAW LINE x1 = read16(sock) y1 = read16(sock) x2 = read16(sock) y2 = read16(sock) draw_line(x1, y1, x2, y2) display.flush() else: print("Unknown command:", cmd) # ------------------------------------------------------------ # TCP server # ------------------------------------------------------------ def start_server(port): s = socket.socket() s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1) s.bind(("0.0.0.0", port)) s.listen(1) print("VT01 server listening on", port) while True: conn, addr = s.accept() print("Client connected:", addr) vt01_display([("VT01A emulator", 0xFF0000),(sta_if.ifconfig()[0] + ":4444", 0xFFFFFF),("Client connected", 0x00FF00),(addr[0], 0x00FF00)]) try: command_handler(conn) except Exception as e: print("Connection closed:", e) finally: conn.close() print("Client disconnected:", addr) vt01_display([("VT01A emulator", 0xFF0000),(sta_if.ifconfig()[0] + ":4444", 0xFFFFFF),("Client disconnected", 0x00FF00),(addr[0], 0x00FF00)]) def vt01_display(lines): display.drawFill(0x000000) y = 100 for line in lines: display.drawText(5, y, line[0], line[1], "dejavusans20") y += 30 display.flush() def on_action_btn_home(pressed): mch22.exit_python() uinterface.connect_wifi() sta_if = network.WLAN(network.STA_IF) vt01_display([("VT01A emulator", 0xFF0000),(sta_if.ifconfig()[0] + ":4444", 0xFFFFFF)]) buttons.attach(buttons.BTN_HOME, on_action_btn_home) start_server(PORT)