NefMoto > Technical > Cluster and Immobilizer (Moderator: ddillenger) > MED 17 , EDC 17 EEPROM CHECKSUM
Pages: [1] 2 3 ... 8
« previous next »
Author Topic: MED 17 , EDC 17 EEPROM CHECKSUM  (Read 89440 times)
obdflasher
Newbie
*

Karma: +0/-6
Offline Offline

Posts: 8
« on: April 02, 2013, 08:26:26 PM »
Working on edc17 eeprom crc.

Looking for serious guy who has experience with crc algo's

Have much and good info.
Logged
Chiptuning Agri
ecutuners
Newbie
*

Karma: +0/-11
Offline Offline

Posts: 6
« Reply #1 on: April 09, 2013, 05:06:17 AM »
i can make all edc17 / med17 eeprom checksum

gttuning2009@yahoo.co.uk

Regards
Logged
obdflasher
Newbie
*

Karma: +0/-6
Offline Offline

Posts: 8
« Reply #2 on: January 17, 2014, 05:49:39 PM »
Problem solved crc 16 , 32 .....
Logged
Chiptuning Agri
chli1976
Jr. Member
**

Karma: +0/-0
Offline Offline

Posts: 25
« Reply #3 on: January 18, 2014, 12:56:03 AM »
Quote from: obdflasher on January 17, 2014, 05:49:39 PM
Problem solved crc 16 , 32 .....

Can we get more infos?
Logged
ecufix
Newbie
*

Karma: +0/-0
Offline Offline

Posts: 4
« Reply #4 on: January 22, 2014, 06:06:09 AM »
Can we get more infos? no man answer ? Grin
Logged
yas200979
Newbie
*

Karma: +0/-2
Offline Offline

Posts: 1
« Reply #5 on: January 30, 2014, 01:21:03 AM »
Hello
i can make all edc17 / med17 eeprom checksum
immo off med17/edc17

info@dpfoff.ru
Logged
ozzy_rp
Jr. Member
**

Karma: +16/-1
Offline Offline

Posts: 49
« Reply #6 on: September 08, 2015, 01:12:00 AM »
All eeprom divided to blocks with 0x80 size
offsets:
0x00 - block id (half word)
0x02 - CS1 (half word)
0x04 - block revision Huh
0x08 - data
0x7C - CS2 (word)
Logged
MED17/EDC17 Reverse engineering
conversion sgo and frf to bin https://osotec.com/
H2Deetoo
Sr. Member
****

Karma: +26/-1
Offline Offline

Posts: 256
« Reply #7 on: September 10, 2015, 03:19:51 AM »
Thanks for info.

With word you mean 16bit or 32bit ?
Logged
ozzy_rp
Jr. Member
**

Karma: +16/-1
Offline Offline

Posts: 49
« Reply #8 on: September 10, 2015, 07:22:33 AM »
Half word - 16 bit
Word - 32 bit

And list Block id from EDC17 eeprom:
1,8,9,A,B,C,1A,1B,1C,1D,1E,1F,2A,2B,2C
2D,2E,2F,3A,3B,3C,3D,3D,3E,3F,17,18,19
20,21,22,23,24,25,26,27,28,29,30,31,32
33,34,35,36,37,38,39,40,41,42,43,44,45
46,47,48,49,CC00
Logged
MED17/EDC17 Reverse engineering
conversion sgo and frf to bin https://osotec.com/
H2Deetoo
Sr. Member
****

Karma: +26/-1
Offline Offline

Posts: 256
« Reply #9 on: September 11, 2015, 02:33:34 AM »
Thanks for specifying that!
For me (in programming) it is common for a word to be 16 bit ;-)


Rgs H2Deetoo
Logged
ozzy_rp
Jr. Member
**

Karma: +16/-1
Offline Offline

Posts: 49
« Reply #10 on: September 11, 2015, 02:55:20 AM »
In TriCore asm another look at it Smiley
Size given in asm mnemonic.
Like this:
ld.hu           d15, [a12]2
extr.u          d2, d2, #0, #0x10
jne16           d15, d2, loc_8013AD6A ; Bad CRC
Logged
MED17/EDC17 Reverse engineering
conversion sgo and frf to bin https://osotec.com/
ozzy_rp
Jr. Member
**

Karma: +16/-1
Offline Offline

Posts: 49
« Reply #11 on: September 24, 2015, 12:28:13 PM »
Next update Smiley


Algorithm for CS1:
data from - 0x04
leight - 0x7C
CS calculated with Tricore internal CRC32 and low half word - CS1
Inicial value - block id


unsigned long crc_buffer(unsigned long crc, const unsigned long *p, unsigned long sz)
{
   const unsigned long poly = 0xEDB88320;
   unsigned long tmp1, tmp2;

   while(sz--)
   {
      tmp1 = 0;
      tmp2 = crc & poly;
      for(int i = 0; i <=31; i++ )
      tmp1 ^= ((tmp2 >> i) & 1);
      crc = *p++ ^ ((crc << 1) | tmp1) ;
   }
   return crc;
}
Logged
MED17/EDC17 Reverse engineering
conversion sgo and frf to bin https://osotec.com/
totalfree
Newbie
*

Karma: +1/-0
Offline Offline

Posts: 2
« Reply #12 on: December 26, 2015, 07:18:59 AM »
Blocks is more.
How to calculate the checksum?
« Last Edit: May 23, 2016, 10:00:11 PM by totalfree » Logged
dream3R
Hero Member
*****

Karma: +18/-8
Offline Offline

Posts: 1194
« Reply #13 on: December 27, 2015, 11:04:27 PM »
Quote from: ozzy_rp on September 24, 2015, 12:28:13 PM
Next update Smiley


Algorithm for CS1:
data from - 0x04
leight - 0x7C
CS calculated with Tricore internal CRC32 and low half word - CS1
Inicial value - block id


unsigned long crc_buffer(unsigned long crc, const unsigned long *p, unsigned long sz)
{
   const unsigned long poly = 0xEDB88320;
   unsigned long tmp1, tmp2;

   while(sz--)
   {
      tmp1 = 0;
      tmp2 = crc & poly;
      for(int i = 0; i <=31; i++ )
      tmp1 ^= ((tmp2 >> i) & 1);
      crc = *p++ ^ ((crc << 1) | tmp1) ;
   }
   return crc;
}




Good job!
Logged


How to work out values from an A2L Smiley

http://nefariousmotorsports.com/forum/index.php?topic=5525.msg52371#msg52371


Starting Rev's http://nefariousmotorsports.com/forum/index.php?topic=5397.msg51169#msg51169

noobs read this before asking http://nefariousmotorsports.com/forum/index.php?topic=9014.0title=


ORGORIGINAL 05 5120 creator for Volvo
ORIGINAL Datalogger (Freeware) Author
ORGINAL finder of the 'extra' torque' limits
I don't have ME7.01 A2L I just use ID
neuro
Full Member
***

Karma: +24/-9
Offline Offline

Posts: 73


WWW
« Reply #14 on: January 02, 2016, 11:44:19 AM »
or use immoff17 https://www.youtube.com/watch?v=BLv68_2x_1g


=P
« Last Edit: January 07, 2016, 06:31:29 AM by neuro » Logged
Pages: [1] 2 3 ... 8
  Print  
« previous next »
 
Jump to:  

Navigation
Personal Tools
  • April 26, 2024, 06:27:26 AM
  • Welcome, Guest. Please login or register.
    Did you miss your activation email?

    Login with username, password and session length
Search
 
Advanced Search
About Disclaimer
All Rights Reserved 2010 Nefarious Motosports
Powered by SMF 1.1.21 | SMF © 2015, Simple Machines Page created in 0.044 seconds with 16 queries. (Pretty URLs adds 0.001s, 0q)