170 lines
6.5 KiB
Python
170 lines
6.5 KiB
Python
"""
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伟迪捷 1880 喷码机 ASCII 协议封装
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帧格式: 纯 ASCII, 字段以 '|' 分隔, 整帧以 <CR>(0x0D) 结尾
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- 写指令(SLA/JDA/CQI/JDI/SST/SNO) 通常无回包
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- 查询指令(GST/GFT/GJD) 回包同样以 <CR> 结尾
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"""
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import socket
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from rest_framework.exceptions import ParseError
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CR = b"\x0d"
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class CoderError(ParseError):
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pass
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class CoderClient:
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def __init__(self, ip: str, port: int = 3100, timeout: float = 2.0):
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if not ip:
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raise CoderError("喷码IP未配置")
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self.ip = ip
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self.port = port
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self.timeout = timeout
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def _send(self, frame: bytes, expect_reply: bool = False) -> bytes:
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try:
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with socket.create_connection((self.ip, self.port), timeout=self.timeout) as s:
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s.sendall(frame)
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if expect_reply:
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buf = b""
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while CR not in buf:
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chunk = s.recv(256)
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if not chunk:
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break
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buf += chunk
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return buf
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# 写指令: 短暂等待, 捕获机器拒绝(ERR/!); 超时则视为成功
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s.settimeout(0.3)
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try:
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buf = b""
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while CR not in buf:
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chunk = s.recv(256)
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if not chunk:
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break
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buf += chunk
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except socket.timeout:
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buf = b""
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if buf:
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text = buf.rstrip(b"\r\n").decode("latin-1", errors="replace")
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if text.startswith("ERR") or text.startswith("!"):
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raise CoderError(f"喷码机拒绝指令 {frame!r}: {text}")
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return b""
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except CoderError:
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raise
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except (socket.timeout, OSError) as e:
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raise CoderError(f"喷码通讯失败 {self.ip}:{self.port} - {e}")
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@staticmethod
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def _encode(text: str, label: str) -> bytes:
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if "\r" in text or "\n" in text:
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raise CoderError(f"{label}含 CR/LF, 会破坏帧结构")
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if "|" in text:
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raise CoderError(f"{label}含 '|', 与 1880 分隔符冲突")
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try:
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return text.encode("latin-1")
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except UnicodeEncodeError as e:
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raise CoderError(f"{label}含喷码机不支持的字符: {e}")
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def send_command(self, command: str, expect_reply: bool = False) -> bytes:
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"""直接下发一条已拼装好的 1880 指令(不含末尾 CR), 由本方法统一补 CR。"""
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if "\r" in command or "\n" in command:
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raise CoderError("指令含 CR/LF, 由 send_command 统一补 CR, 不要手动拼")
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return self._send(command.encode("latin-1") + CR, expect_reply=expect_reply)
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def select_job(self, job_name: str):
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"""SLA|<jobname>|<CR> 选择信息模板"""
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self._send(b"SLA|" + self._encode(job_name, "模板名") + b"|" + CR)
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def update_fields(self, fields: dict):
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"""JDA|<field>=<value>|...|<CR> 一帧更新多个用户区"""
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if not fields:
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return
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parts = [b"JDA"]
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for k, v in fields.items():
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parts.append(self._encode(str(k), "用户区名") + b"=" + self._encode(str(v), "喷印内容"))
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self._send(b"|".join(parts) + b"|" + CR)
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def clear_queue(self):
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"""CQI<CR> 清空喷码机内部缓存队列"""
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self._send(b"CQI" + CR)
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def push_queue(self, fields: dict):
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"""JDI|1|<field>=<value>|...|<CR> 入队列数据"""
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if not fields:
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return
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parts = [b"JDI", b"1"]
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for k, v in fields.items():
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parts.append(self._encode(str(k), "用户区名") + b"=" + self._encode(str(v), "喷印内容"))
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self._send(b"|".join(parts) + b"|" + CR)
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def set_state(self, state: int):
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"""SST|<State>|<CR> 0关机 1开机 3运行 4离线"""
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self._send(b"SST|" + str(int(state)).encode("ascii") + b"|" + CR)
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def register_print_callback(self):
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"""SNO|PRC|1|<CR> 注册打印完成反馈, 之后喷码机每打印一次会回 PRC<CR>"""
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self._send(b"SNO|PRC|1|" + CR)
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def get_status(self) -> dict:
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"""GST<CR> -> STS|<overall>|<error>|<currentjob>|<batchcount>|<totalcount>|<CR>"""
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resp = self._send(b"GST" + CR, expect_reply=True)
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parts = resp.rstrip(b"\r\n").decode("latin-1").split("|")
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if not parts or parts[0] != "STS" or len(parts) < 6:
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raise CoderError(f"GST 响应不识别: {resp!r}")
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try:
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return {
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"overall": int(parts[1]),
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"error": int(parts[2]),
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"current_job": parts[3],
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"batch_count": int(parts[4]),
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"total_count": int(parts[5]),
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}
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except ValueError as e:
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raise CoderError(f"GST 响应解析失败: {resp!r} - {e}")
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def get_faults(self) -> list:
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"""GFT<CR> -> FLT|<count>|[<code>|<clearable>|<title>|]*<CR>"""
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resp = self._send(b"GFT" + CR, expect_reply=True)
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parts = resp.rstrip(b"\r\n").decode("latin-1").split("|")
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if not parts or parts[0] != "FLT" or len(parts) < 2:
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raise CoderError(f"GFT 响应不识别: {resp!r}")
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try:
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count = int(parts[1])
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except ValueError as e:
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raise CoderError(f"GFT 响应解析失败: {resp!r} - {e}")
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faults = []
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for i in range(count):
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base = 2 + i * 3
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if base + 2 >= len(parts):
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break
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faults.append({
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"code": parts[base],
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"clearable": parts[base + 1] == "1",
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"title": parts[base + 2],
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})
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return faults
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def get_current_job(self) -> dict:
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"""GJD<CR> -> JDL|<count>|<field>=<value>|...|<CR>"""
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resp = self._send(b"GJD" + CR, expect_reply=True)
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parts = resp.rstrip(b"\r\n").decode("latin-1").split("|")
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if not parts or parts[0] != "JDL" or len(parts) < 2:
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raise CoderError(f"GJD 响应不识别: {resp!r}")
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try:
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count = int(parts[1])
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except ValueError as e:
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raise CoderError(f"GJD 响应解析失败: {resp!r} - {e}")
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fields = {}
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for i in range(count):
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idx = 2 + i
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if idx >= len(parts):
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break
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pair = parts[idx]
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if "=" not in pair:
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continue
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k, v = pair.split("=", 1)
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fields[k] = v
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return fields
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