83 lines
1.7 KiB
Python
83 lines
1.7 KiB
Python
import shutil
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import sys
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import os
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import json
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BOOT_PATH ="JW3425_boot_v10.bin"
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APP_PATH ="MS-IEpro20231007.bin"
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OUT_PATH = BOOT_PATH.split('.')[0]+".jwt"
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# 创建离线下载器的镜像
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# 填充指定个数的byte
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def arr_byte_copy(byte:int,num:int):
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t=bytearray()
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for i in range(num):
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t.append(byte)
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return t
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# int转数组
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def arr_from_int(num:int):
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return bytearray([num&0xff,(num>>8)&0xff,(num>>16)&0xff,(num>>24)&0xff])
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def arr_from_str(txt:str):
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t=bytearray(txt.encode(encoding="utf-8"))
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t+=arr_byte_copy(0,1)
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return t
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def crc32(data:bytearray):
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temp=0
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crc=0xffffffff
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i=0
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if(len(data)%4!=0):
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return 0
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while(i<len(data)):
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temp=data[i]|(data[i+1]<<8)|(data[i+2]<<16)|(data[i+3]<<24)
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i+=4
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for j in range(32):
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if((crc^temp)&0x80000000)!=0:
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crc=0x04c11db7^(crc<<1)
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else:
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crc<<=1
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temp<<=1
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crc&=0xffffffff
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return crc
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def creat():
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boot=BOOT_PATH
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app=APP_PATH
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d=bytearray()
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with open(boot,"rb") as f:
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d+=f.read()
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d+=arr_byte_copy(0x00,4096-len(d))
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with open(app,"rb") as f:
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d+=f.read()
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d+=arr_byte_copy(0x00,0x3c7c-len(d))
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d+=arr_from_int(0x55aa6699)
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d+=arr_byte_copy(0x00,1024*16-len(d))
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crc_all=crc32(d)
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crc_app=crc32(d[4096:])
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print("crc32 of all data:",hex(crc_all))
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print("crc32 for 0x1000:",hex(crc_app))
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d+=arr_from_int(crc_all)
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d+=arr_from_int(crc_app)
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d+=arr_from_str(OUT_PATH)
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with open(OUT_PATH,"wb+") as f:
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f.write(d)
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print(OUT_PATH+" create boot file success.")
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if __name__ == "__main__":
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creat()
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