299 lines
9.9 KiB
Python
299 lines
9.9 KiB
Python
#!/usr/bin/env python3
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import sys
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import os
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import time
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import serial
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import threading
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import argparse
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from serial.tools.miniterm import console, character, LF
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sfl_magic_len = 14
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sfl_magic_req = "sL5DdSMmkekro\n"
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sfl_magic_ack = "z6IHG7cYDID6o\n"
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# General commands
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sfl_cmd_abort = 0x00
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sfl_cmd_load = 0x01
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sfl_cmd_jump = 0x02
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# Replies
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sfl_ack_success = 'K'
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sfl_ack_crcerror = 'C'
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sfl_ack_unknown = 'U'
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sfl_ack_error = 'E'
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# XXX : can we get CRC16 from a standard Python library as it's done
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# for CRC32 with binascii?
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crc16_table = [
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0x0000, 0x1021, 0x2042, 0x3063, 0x4084, 0x50A5, 0x60C6, 0x70E7,
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0x8108, 0x9129, 0xA14A, 0xB16B, 0xC18C, 0xD1AD, 0xE1CE, 0xF1EF,
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0x1231, 0x0210, 0x3273, 0x2252, 0x52B5, 0x4294, 0x72F7, 0x62D6,
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0x9339, 0x8318, 0xB37B, 0xA35A, 0xD3BD, 0xC39C, 0xF3FF, 0xE3DE,
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0x2462, 0x3443, 0x0420, 0x1401, 0x64E6, 0x74C7, 0x44A4, 0x5485,
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0xA56A, 0xB54B, 0x8528, 0x9509, 0xE5EE, 0xF5CF, 0xC5AC, 0xD58D,
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0x3653, 0x2672, 0x1611, 0x0630, 0x76D7, 0x66F6, 0x5695, 0x46B4,
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0xB75B, 0xA77A, 0x9719, 0x8738, 0xF7DF, 0xE7FE, 0xD79D, 0xC7BC,
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0x48C4, 0x58E5, 0x6886, 0x78A7, 0x0840, 0x1861, 0x2802, 0x3823,
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0xC9CC, 0xD9ED, 0xE98E, 0xF9AF, 0x8948, 0x9969, 0xA90A, 0xB92B,
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0x5AF5, 0x4AD4, 0x7AB7, 0x6A96, 0x1A71, 0x0A50, 0x3A33, 0x2A12,
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0xDBFD, 0xCBDC, 0xFBBF, 0xEB9E, 0x9B79, 0x8B58, 0xBB3B, 0xAB1A,
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0x6CA6, 0x7C87, 0x4CE4, 0x5CC5, 0x2C22, 0x3C03, 0x0C60, 0x1C41,
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0xEDAE, 0xFD8F, 0xCDEC, 0xDDCD, 0xAD2A, 0xBD0B, 0x8D68, 0x9D49,
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0x7E97, 0x6EB6, 0x5ED5, 0x4EF4, 0x3E13, 0x2E32, 0x1E51, 0x0E70,
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0xFF9F, 0xEFBE, 0xDFDD, 0xCFFC, 0xBF1B, 0xAF3A, 0x9F59, 0x8F78,
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0x9188, 0x81A9, 0xB1CA, 0xA1EB, 0xD10C, 0xC12D, 0xF14E, 0xE16F,
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0x1080, 0x00A1, 0x30C2, 0x20E3, 0x5004, 0x4025, 0x7046, 0x6067,
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0x83B9, 0x9398, 0xA3FB, 0xB3DA, 0xC33D, 0xD31C, 0xE37F, 0xF35E,
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0x02B1, 0x1290, 0x22F3, 0x32D2, 0x4235, 0x5214, 0x6277, 0x7256,
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0xB5EA, 0xA5CB, 0x95A8, 0x8589, 0xF56E, 0xE54F, 0xD52C, 0xC50D,
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0x34E2, 0x24C3, 0x14A0, 0x0481, 0x7466, 0x6447, 0x5424, 0x4405,
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0xA7DB, 0xB7FA, 0x8799, 0x97B8, 0xE75F, 0xF77E, 0xC71D, 0xD73C,
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0x26D3, 0x36F2, 0x0691, 0x16B0, 0x6657, 0x7676, 0x4615, 0x5634,
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0xD94C, 0xC96D, 0xF90E, 0xE92F, 0x99C8, 0x89E9, 0xB98A, 0xA9AB,
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0x5844, 0x4865, 0x7806, 0x6827, 0x18C0, 0x08E1, 0x3882, 0x28A3,
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0xCB7D, 0xDB5C, 0xEB3F, 0xFB1E, 0x8BF9, 0x9BD8, 0xABBB, 0xBB9A,
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0x4A75, 0x5A54, 0x6A37, 0x7A16, 0x0AF1, 0x1AD0, 0x2AB3, 0x3A92,
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0xFD2E, 0xED0F, 0xDD6C, 0xCD4D, 0xBDAA, 0xAD8B, 0x9DE8, 0x8DC9,
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0x7C26, 0x6C07, 0x5C64, 0x4C45, 0x3CA2, 0x2C83, 0x1CE0, 0x0CC1,
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0xEF1F, 0xFF3E, 0xCF5D, 0xDF7C, 0xAF9B, 0xBFBA, 0x8FD9, 0x9FF8,
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0x6E17, 0x7E36, 0x4E55, 0x5E74, 0x2E93, 0x3EB2, 0x0ED1, 0x1EF0
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]
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def crc16(l):
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crc = 0
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for d in l:
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crc = crc16_table[((crc >> 8) ^ d) & 0xff] ^ (crc << 8)
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return crc
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class SFLFrame:
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def __init__(self):
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self.length = None
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self.cmd = None
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self.payload = []
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self.crc = None
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self.raw = []
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def compute_crc(self):
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crc_data = []
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crc_data.append(self.cmd)
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for d in self.payload:
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crc_data.append(d)
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self.crc = crc16(crc_data)
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return self.crc
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def encode(self):
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self.raw = []
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self.raw.append(self.length)
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self.compute_crc()
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self.raw.append((self.crc & 0xff00) >> 8)
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self.raw.append(self.crc & 0x00ff)
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self.raw.append(self.cmd)
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for d in self.payload:
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self.raw.append(d)
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def get_file_data(filename):
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with open(filename, "rb") as f:
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data = []
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while True:
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w = f.read(1)
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if not w:
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break
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data.append(int.from_bytes(w, "big"))
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return data
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class Flterm:
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def __init__(self, kernel_image, kernel_address):
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self.kernel_image = kernel_image
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self.kernel_address = kernel_address
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self.reader_alive = False
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self.writer_alive = False
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self.detect_magic_str = " "*len(sfl_magic_req)
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def open(self, port, speed):
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port = port if not port.isdigit() else int(port)
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self.serial = serial.Serial(port, speed, timeout=0.25)
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self.serial.flushOutput()
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self.serial.flushInput()
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self.serial.close() # in case port was not correctly closed
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self.serial.open()
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def close(self):
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self.serial.close()
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def write_exact(self, data):
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if isinstance(data, str):
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self.serial.write(bytes(data, "utf-8"))
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else:
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self.serial.write(serial.to_bytes(data))
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def send_frame(self, frame):
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frame.encode()
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retry = 1
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while retry:
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self.write_exact(frame.raw)
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# Get the reply from the device
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reply = character(self.serial.read())
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if reply == sfl_ack_success:
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retry = 0
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elif reply == sfl_ack_crcerror:
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retry = 1
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else:
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print("[FLTERM] Got unknown reply '{}' from the device, aborting.".format(reply))
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return 0
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return 1
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def upload(self, filename, address):
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data = get_file_data(filename)
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print("[FLTERM] Uploading {} ({} bytes)...".format(filename, len(data)))
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current_address = address
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position = 0
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length = len(data)
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start = time.time()
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while len(data) != 0:
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print("{}%\r".format(100*position//length), end="")
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frame = SFLFrame()
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if len(data) > 251:
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frame_data = data[:251]
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frame.length = len(frame_data)+4
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frame.cmd = sfl_cmd_load
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frame.payload.append((current_address & 0xff000000) >> 24)
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frame.payload.append((current_address & 0x00ff0000) >> 16)
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frame.payload.append((current_address & 0x0000ff00) >> 8)
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frame.payload.append((current_address & 0x000000ff) >> 0)
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for d in frame_data:
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frame.payload.append(d)
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if self.send_frame(frame) == 0:
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return
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current_address += len(frame_data)
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position += len(frame_data)
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try:
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data = data[251:]
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except:
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data = []
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end = time.time()
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elapsed = end - start
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print("[FLTERM] Upload complete ({0:.1f}KB/s).".format(length/(elapsed*1024)))
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return length
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def boot(self):
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print("[FLTERM] Booting the device.")
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frame = SFLFrame()
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frame.length = 4
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frame.cmd = sfl_cmd_jump
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frame.payload.append((self.kernel_address & 0xff000000) >> 24)
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frame.payload.append((self.kernel_address & 0x00ff0000) >> 16)
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frame.payload.append((self.kernel_address & 0x0000ff00) >> 8)
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frame.payload.append((self.kernel_address & 0x000000ff) >> 0)
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self.send_frame(frame)
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def detect_magic(self, data):
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if data is not "":
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self.detect_magic_str = self.detect_magic_str[1:] + data
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return self.detect_magic_str == sfl_magic_req
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else:
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return False
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def answer_magic(self):
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print("[FLTERM] Received firmware download request from the device.")
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if os.path.exists(self.kernel_image):
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self.write_exact(sfl_magic_ack)
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self.upload(self.kernel_image, self.kernel_address)
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self.boot()
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print("[FLTERM] Done.");
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def reader(self):
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try:
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while self.reader_alive:
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c = character(self.serial.read())
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if c == '\r':
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sys.stdout.write('\n')
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else:
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sys.stdout.write(c)
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sys.stdout.flush()
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if self.kernel_image is not None:
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if self.detect_magic(c):
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self.answer_magic()
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except serial.SerialException:
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self.reader_alive = False
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raise
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def start_reader(self):
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self.reader_alive = True
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self.reader_thread = threading.Thread(target=self.reader)
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self.reader_thread.setDaemon(True)
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self.reader_thread.start()
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def stop_reader(self):
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self.reader_alive = False
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self.reader_thread.join()
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def writer(self):
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try:
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while self.writer_alive:
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try:
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b = console.getkey()
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except KeyboardInterrupt:
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b = serial.to_bytes([3])
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c = character(b)
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if c == chr(0x03):
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self.stop()
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elif c == '\n':
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self.serial.write(LF)
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else:
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self.serial.write(b)
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except:
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self.writer_alive = False
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raise
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def start_writer(self):
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self.writer_alive = True
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self.writer_thread = threading.Thread(target=self.writer)
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self.writer_thread.setDaemon(True)
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self.writer_thread.start()
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def stop_writer(self):
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self.writer_alive = False
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self.writer_thread.join()
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def start(self):
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print("[FLTERM] Starting....")
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self.start_reader()
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self.start_writer()
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def stop(self):
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self.reader_alive = False
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self.writer_alive = False
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def join(self, writer_only=False):
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self.writer_thread.join()
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if not writer_only:
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self.reader_thread.join()
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def _get_args():
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parser = argparse.ArgumentParser()
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parser.add_argument("--port", default="2", help="serial port")
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parser.add_argument("--speed", default=115200, help="serial baudrate")
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parser.add_argument("--kernel", default=None, help="kernel image")
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parser.add_argument("--kernel_adr", default=0x40000000, help="kernel address")
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return parser.parse_args()
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if __name__ == "__main__":
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args = _get_args()
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flterm = Flterm(args.kernel, args.kernel_adr)
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flterm.open(args.port, args.speed)
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flterm.start()
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try:
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flterm.join(True)
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except KeyboardInterrupt:
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pass
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flterm.join()
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