mirror of
https://github.com/bkerler/edl
synced 2024-11-22 06:26:24 +00:00
244 lines
7.8 KiB
Python
Executable File
244 lines
7.8 KiB
Python
Executable File
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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# (c) B.Kerler 2018-2024 under GPLv3 license
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# If you use my code, make sure you refer to my name
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#
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# !!!!! If you use this code in commercial products, your product is automatically
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# GPLv3 and has to be open sourced under GPLv3 as well. !!!!!
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import logging
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import time
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from struct import unpack
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MAX_PACKET_LEN = 4096
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crcTbl = (
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0x0000, 0x1189, 0x2312, 0x329b, 0x4624, 0x57ad, 0x6536, 0x74bf,
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0x8c48, 0x9dc1, 0xaf5a, 0xbed3, 0xca6c, 0xdbe5, 0xe97e, 0xf8f7,
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0x1081, 0x0108, 0x3393, 0x221a, 0x56a5, 0x472c, 0x75b7, 0x643e,
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0x9cc9, 0x8d40, 0xbfdb, 0xae52, 0xdaed, 0xcb64, 0xf9ff, 0xe876,
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0x2102, 0x308b, 0x0210, 0x1399, 0x6726, 0x76af, 0x4434, 0x55bd,
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0xad4a, 0xbcc3, 0x8e58, 0x9fd1, 0xeb6e, 0xfae7, 0xc87c, 0xd9f5,
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0x3183, 0x200a, 0x1291, 0x0318, 0x77a7, 0x662e, 0x54b5, 0x453c,
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0xbdcb, 0xac42, 0x9ed9, 0x8f50, 0xfbef, 0xea66, 0xd8fd, 0xc974,
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0x4204, 0x538d, 0x6116, 0x709f, 0x0420, 0x15a9, 0x2732, 0x36bb,
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0xce4c, 0xdfc5, 0xed5e, 0xfcd7, 0x8868, 0x99e1, 0xab7a, 0xbaf3,
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0x5285, 0x430c, 0x7197, 0x601e, 0x14a1, 0x0528, 0x37b3, 0x263a,
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0xdecd, 0xcf44, 0xfddf, 0xec56, 0x98e9, 0x8960, 0xbbfb, 0xaa72,
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0x6306, 0x728f, 0x4014, 0x519d, 0x2522, 0x34ab, 0x0630, 0x17b9,
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0xef4e, 0xfec7, 0xcc5c, 0xddd5, 0xa96a, 0xb8e3, 0x8a78, 0x9bf1,
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0x7387, 0x620e, 0x5095, 0x411c, 0x35a3, 0x242a, 0x16b1, 0x0738,
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0xffcf, 0xee46, 0xdcdd, 0xcd54, 0xb9eb, 0xa862, 0x9af9, 0x8b70,
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0x8408, 0x9581, 0xa71a, 0xb693, 0xc22c, 0xd3a5, 0xe13e, 0xf0b7,
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0x0840, 0x19c9, 0x2b52, 0x3adb, 0x4e64, 0x5fed, 0x6d76, 0x7cff,
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0x9489, 0x8500, 0xb79b, 0xa612, 0xd2ad, 0xc324, 0xf1bf, 0xe036,
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0x18c1, 0x0948, 0x3bd3, 0x2a5a, 0x5ee5, 0x4f6c, 0x7df7, 0x6c7e,
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0xa50a, 0xb483, 0x8618, 0x9791, 0xe32e, 0xf2a7, 0xc03c, 0xd1b5,
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0x2942, 0x38cb, 0x0a50, 0x1bd9, 0x6f66, 0x7eef, 0x4c74, 0x5dfd,
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0xb58b, 0xa402, 0x9699, 0x8710, 0xf3af, 0xe226, 0xd0bd, 0xc134,
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0x39c3, 0x284a, 0x1ad1, 0x0b58, 0x7fe7, 0x6e6e, 0x5cf5, 0x4d7c,
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0xc60c, 0xd785, 0xe51e, 0xf497, 0x8028, 0x91a1, 0xa33a, 0xb2b3,
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0x4a44, 0x5bcd, 0x6956, 0x78df, 0x0c60, 0x1de9, 0x2f72, 0x3efb,
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0xd68d, 0xc704, 0xf59f, 0xe416, 0x90a9, 0x8120, 0xb3bb, 0xa232,
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0x5ac5, 0x4b4c, 0x79d7, 0x685e, 0x1ce1, 0x0d68, 0x3ff3, 0x2e7a,
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0xe70e, 0xf687, 0xc41c, 0xd595, 0xa12a, 0xb0a3, 0x8238, 0x93b1,
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0x6b46, 0x7acf, 0x4854, 0x59dd, 0x2d62, 0x3ceb, 0x0e70, 0x1ff9,
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0xf78f, 0xe606, 0xd49d, 0xc514, 0xb1ab, 0xa022, 0x92b9, 0x8330,
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0x7bc7, 0x6a4e, 0x58d5, 0x495c, 0x3de3, 0x2c6a, 0x1ef1, 0x0f78)
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def serial16le(data):
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out = bytearray()
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out.append(data & 0xFF)
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out.append((data >> 8) & 0xFF)
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return out
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def serial16(data):
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out = bytearray()
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out.append((data >> 8) & 0xFF)
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out.append(data & 0xFF)
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return out
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def serial32le(data):
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out = bytearray()
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out += serial16le(data & 0xFFFF)
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out += serial16le((data >> 16) & 0xFFFF)
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return out
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def crc16(iv, data):
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for byte in data:
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iv = ((iv >> 8) & 0xFFFF) ^ crcTbl[(iv ^ byte) & 0xFF]
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return ~iv & 0xFFFF
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def serial32(data):
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out = bytearray()
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out += serial16((data >> 16) & 0xFFFF)
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out += serial16(data & 0xFFFF)
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return out
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def escape(indata):
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outdata = bytearray()
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for i in range(0, len(indata)):
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buf = indata[i]
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if buf == 0x7e:
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outdata.append(0x7d)
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outdata.append(0x5e)
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elif buf == 0x7d:
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outdata.append(0x7d)
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outdata.append(0x5d)
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else:
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outdata.append(buf)
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return outdata
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def unescape(indata):
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mescape = False
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out = bytearray()
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for buf in indata:
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if mescape:
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if buf == 0x5e:
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out.append(0x7e)
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elif buf == 0x5d:
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out.append(0x7d)
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else:
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logging.error("Fatal error unescaping buffer!")
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return None
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mescape = False
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else:
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if buf == 0x7d:
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mescape = True
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else:
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out.append(buf)
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if len(out) == 0:
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return None
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return out
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def convert_cmdbuf(indata):
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crc16val = crc16(0xFFFF, indata)
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indata.extend(bytearray(serial16le(crc16val)))
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outdata = escape(indata)
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outdata.append(0x7E)
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return outdata
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class hdlc:
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def __init__(self, cdc):
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self.cdc = cdc
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self.programmer = None
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self.timeout = 1500
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def receive_reply(self, timeout=None):
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replybuf = bytearray()
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if timeout is None:
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timeout = self.timeout
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tmp = self.cdc.read(timeout=timeout)
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if tmp == bytearray():
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return b""
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if tmp == b"":
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return b""
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retry = 0
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while tmp[-1] != 0x7E:
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time.sleep(0.01)
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tmp += self.cdc.read(timeout=timeout)
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retry += 1
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if retry > 5:
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break
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replybuf.extend(tmp)
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data = unescape(replybuf)
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# print(hexlify(data))
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if len(data) > 3:
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if data[0] == 0x7E:
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data = data[1:]
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crc16val = crc16(0xFFFF, data[:-3])
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reccrc = int(data[-3]) + (int(data[-2]) << 8)
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if crc16val != reccrc:
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return -1
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else:
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time.sleep(0.01)
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data = self.cdc.read(timeout=timeout)
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if len(data) > 3:
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crc16val = crc16(0xFFFF, data[:-3])
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reccrc = int(data[-3]) + (int(data[-2]) << 8)
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if crc16val != reccrc:
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return -1
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return data
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return data[:-3]
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def receive_reply_nocrc(self, timeout=None):
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replybuf = bytearray()
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if timeout is None:
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timeout = self.timeout
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tmp = self.cdc.read(timeout=timeout)
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if tmp == bytearray():
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return b""
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if tmp == b"":
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return b""
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retry = 0
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while tmp[-1] != 0x7E:
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# time.sleep(0.05)
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tmp += self.cdc.read(timeout=timeout)
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retry += 1
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if retry > 5:
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break
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replybuf.extend(tmp)
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data = unescape(replybuf)
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# print(hexlify(data))
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if len(data) > 3:
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# crc16val = self.crc16(0xFFFF, data[:-3])
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# reccrc = int(data[-3]) + (int(data[-2]) << 8)
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return data[:-3]
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else:
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time.sleep(0.5)
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data = self.cdc.read(timeout=timeout)
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if len(data) > 3:
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# crc16val = self.crc16(0xFFFF, data[:-3])
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# reccrc = int(data[-3]) + (int(data[-2]) << 8)
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return data[:-3]
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else:
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return data
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def send_unframed_buf(self, outdata, prefixflag):
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# ttyflush()
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if prefixflag:
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tmp = bytearray()
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tmp.append(0x7E)
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tmp.extend(outdata)
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outdata = tmp
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return self.cdc.write(outdata[:MAX_PACKET_LEN])
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# FlushFileBuffers(ser)
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def send_cmd_base(self, outdata, prefixflag, nocrc=False):
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if isinstance(outdata, str):
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outdata = bytes(outdata, 'utf-8')
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packet = convert_cmdbuf(bytearray(outdata))
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self.cdc.flush()
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if self.send_unframed_buf(packet, prefixflag):
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if nocrc:
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return self.receive_reply_nocrc()
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else:
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return self.receive_reply()
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return b""
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def send_cmd(self, outdata, nocrc=False):
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return self.send_cmd_base(outdata, 1, nocrc)
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def send_cmd_np(self, outdata, nocrc=False):
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return self.send_cmd_base(outdata, 0, nocrc)
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def show_errpacket(self, descr, pktbuf):
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if len(pktbuf) == 0:
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return
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logging.error("Error: %s " % descr)
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if pktbuf[1] == 0x0e:
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pktbuf[-4] = 0
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# puts(pktbuf+2)
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ret = self.receive_reply()
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errorcode = unpack("<I", ret[2:2 + 4])
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logging.error("Error code = %08x\n\n", errorcode)
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