108 lines
4.0 KiB
Python
108 lines
4.0 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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"""dlpc_rs485 协议自检(无硬件): 对照上游 protocols.md 的实测帧向量做回归
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用法: python selftest_rs485.py (全部通过退出码 0)
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"""
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import sys
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import dlpc_rs485 as d
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fails = []
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def check(name, got, want):
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ok = got == want
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print(('PASS' if ok else 'FAIL'), name, '->', got, '' if ok else f'(期望 {want})')
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if not ok:
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fails.append(name)
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# 1) 帧构造: protocols.md 实测示例 M730S0T2000
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f = d.build_frame('M730S0T2000')
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check('build_frame(M730S0T2000)', f.hex(' ').upper(),
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'D5 01 0B 4D 37 33 30 53 30 54 32 30 30 30 8C')
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# 2) 增量解析: ok 应答跨两个半包喂入
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p = d.FrameParser()
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r1 = p.feed(bytes.fromhex('B5 F0'))
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r2 = p.feed(bytes.fromhex('02 6F 6B CC'))
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check('split-feed frames', len(r1) + len(r2), 1)
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fr = (r1 + r2)[0]
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check('type_code', fr.type_code, 0xF0)
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check('payload', fr.payload, 'ok')
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check('describe(ok)', d.describe(fr), 'ok')
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# 3) 前导噪声 + 0xFD err:OL 译码(字符串标记, 不附 DLPC 释义)
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body = bytes.fromhex('FD 06 65 72 72 3A 4F 4C') # "err:OL"
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good = bytes([0xB5]) + body + bytes([d.sum_crc(body)])
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frames = d.FrameParser().feed(b'\x01\x02' + good)
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check('noise+err-frame count', len(frames), 1)
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check('describe(err:OL)', d.describe(frames[0]), '参数越界/读回复核不一致 err:OL')
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# 4) 0xFA + 数字错误码 err:3 追加 DLPC 释义
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body = bytes.fromhex('FA 05') + b'err:3'
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fa = bytes([0xB5]) + body + bytes([d.sum_crc(body)])
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frames = d.FrameParser().feed(fa)
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check('describe(err:3)', d.describe(frames[0]),
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'开光机通信失败 err:3（I2C NACK(器件无应答)）')
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# 5) CRC 坏帧被丢弃后继续同步到下一帧
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bad = bytearray(good)
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bad[-1] ^= 0xFF
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frames = d.FrameParser().feed(bytes(bad) + good)
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check('bad-crc then good', len(frames), 1)
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check('recovered type', frames[0].type_code, 0xFD)
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# 6) 非法输入拒绝
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for bad_cmd in ('', ' '):
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try:
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d.build_frame(bad_cmd)
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fails.append('empty-cmd-not-rejected')
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except ValueError:
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pass
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try:
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d.build_frame('M' * 40)
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fails.append('long-cmd-not-rejected')
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except ValueError:
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pass
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print('空/超长命令拒绝: PASS')
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# 7) 预设命令全部可组帧
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for _name, cmd, _note in d.PRESETS:
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d.build_frame(cmd)
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print(f'预设 {len(d.PRESETS)} 条全部可组帧: PASS')
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# 8) M303/M304(SQ52205 电源实测)回归向量: 上游真机抓取帧
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check('build_frame(M303)', d.build_frame('M303').hex(' ').upper(),
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'D5 01 04 4D 33 30 33 E8')
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check('build_frame(M304)', d.build_frame('M304').hex(' ').upper(),
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'D5 01 04 4D 33 30 34 E9')
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frames = d.FrameParser().feed(bytes.fromhex('B5 F0 02 2E F4 14'))
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check('M303 应答帧', len(frames), 1)
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check('M303 电压(0x2EF4=12020mV)', d.format_power('M303', frames[0]),
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'12020 mV (12.02 V)')
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frames = d.FrameParser().feed(bytes.fromhex('B5 F0 02 00 34 26'))
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check('M304 应答帧', len(frames), 1)
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check('M304 电流(0x0034=+52mA)', d.format_power('M304', frames[0]), '+52 mA')
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check('M304 负值(FF06=-250mA 补码)', d.payload_s16_be(bytes.fromhex('FF 06')), -250)
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# 9) M305(SQ52205 实测功率)回归向量: u32 大端 mW(LEN=4, 算法推演帧)
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check('build_frame(M305)', d.build_frame('M305').hex(' ').upper(),
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'D5 01 04 4D 33 30 35 EA')
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frames = d.FrameParser().feed(bytes.fromhex('B5 F0 04 00 00 8C A0 20'))
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check('M305 应答帧', len(frames), 1)
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check('M305 功率(0x8CA0=36000mW)', d.format_power('M305', frames[0]),
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'36000 mW (36.00 W)')
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check('M305 拒绝双字节载荷', d.format_power(
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'M305', d.FrameParser().feed(bytes.fromhex('B5 F0 02 8C A0 1E'))[0]), None)
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# 10) 二进制载荷的日志行安全: 无控制字符(NUL 会截断 Windows 剪贴板), 以 hex 展示
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frames = d.FrameParser().feed(bytes.fromhex('B5 F0 02 00 34 26')) # M304 应答(含 NUL)
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desc = d.describe(frames[0])
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check('二进制载荷 hex 展示', desc, '[二进制载荷 00 34]')
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check('日志行无控制字符', any(ord(c) < 0x20 for c in desc), False)
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print('RESULT:', 'FAIL:' + ','.join(fails) if fails else 'ALL PASS')
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sys.exit(1 if fails else 0)
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