通过总线下载模块程序

doc/creat_jwt_boot.py

@@ -5,7 +5,7 @@ import json
 
 
 
-BOOT_PATH ="JW3425_boot_v6.bin"
+BOOT_PATH ="JW3425_boot_v8.bin"
 APP_PATH ="MS-IEpro20231007.bin"
 OUT_PATH = "jwt_program.jwt"
 
@@ -23,6 +23,27 @@ def arr_from_int(num:int):
     return  bytearray([num&0xff,(num>>8)&0xff,(num>>16)&0xff,(num>>24)&0xff])
 
 
+
+def crc32(data:bytearray):
+    temp=0
+    crc=0xffffffff
+    i=0
+    if(len(data)%4!=0):
+        return 0
+    while(i<len(data)):
+        temp=data[i]|(data[i+1]<<8)|(data[i+2]<<16)|(data[i+3]<<24)
+        i+=4
+        for j in range(32):
+            if((crc^temp)&0x80000000)!=0:
+                crc=0x04c11db7^(crc<<1)
+            else:
+                crc<<=1
+            temp<<=1
+        crc&=0xffffffff
+    return crc
+
+
+
 def creat():
     boot=BOOT_PATH
     app=APP_PATH
@@ -35,6 +56,10 @@ def creat():
     d+=arr_byte_copy(0x00,0x3c7c-len(d))
     d+=arr_from_int(0x55aa6699)
     d+=arr_byte_copy(0x00,1024*16-len(d))
+
+    print("crc32 of all data:",hex(crc32(d)))
+    print("crc32 for 0x1000:",hex(crc32(d[4096:])))
+
     with open(OUT_PATH,"wb+") as f:
         f.write(d)
         print(OUT_PATH+" create boot file success.")