ddillenger
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« Reply #300 on: June 06, 2013, 09:50:20 AM »
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ME7 EEPROM Checksum-Guide
=========================
The ME7 EEPROM contains 512 bytes and is divided into 32 pages with 16 bytes per page.
In the ME7 code you will find a table with 32 entries that contains one descriptor word for
each eeprom page. The index into this table is the eeprom pagenumber (00..31).
The descriptor word is a bitmask, the following bits are relevant for the checksum calculation:
bit 0 = checksumPresent(CS) 1 -> page has checksum, 0 -> page has no checksum.
bit 6 = cksumBit(CB) this bit is subtracted from the pageNumber to get the
same checksum in backup page as in original page.
bit 7 = backupPage(BP) 1 -> page has a backup page.
Here is how the eeprom page info table looks like:
PAGE DESCR-WORD -> CHECKSUM-BITS
-----------------------------------
00 FF18 -> --
01 0017 -> (CS)
02 0117 -> (CS)
03 0207 -> (CS)
04 0307 -> (CS)
05 0437 -> (CS)
06 0533 -> (CS)
07 06B7 -> (CS) (BP)
08 06F7 -> (CS) (BP) (CB)
09 07B3 -> (CS) (BP)
10 07F3 -> (CS) (BP) (CB)
11 08B7 -> (CS) (BP)
12 08F7 -> (CS) (BP) (CB)
13 09B3 -> (CS) (BP)
14 09F3 -> (CS) (BP) (CB)
15 0AB3 -> (CS) (BP)
16 0AF3 -> (CS) (BP) (CB)
17 0B32 -> --
18 0B10 -> --
19 0B10 -> --
20 0B10 -> --
21 0C37 -> (CS)
22 0D33 -> (CS)
23 0E33 -> (CS)
24 0F33 -> (CS)
25 1033 -> (CS)
26 1133 -> (CS)
27 1233 -> (CS)
28 1235 -> (CS)
29 1235 -> (CS)
30 13B7 -> (CS) (BP)
31 13F7 -> (CS) (BP) (CB)
If the checksumBit(CS) is set for a page, this page has a checksum.
Calculate the checksum as follows:
- sum up the first 14 bytes of the eeprom page in a 16bit variable.
- add the page number to the sum.
- if the checksumBit(CB) is set, subtract 1 from the sum.
- negate the sum (this is not the same as complement!).
- store the resulting value in the last two bytes of the eeprom page,
first the low-byte, then the high-byte.
Disclaimer: this information was collected to the best of one's knowledge, but I won't give
any guarantees for the correctness of my information. If you find any errors, please correct.
Have fun, mki
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
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EuroDriven
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« Reply #301 on: June 06, 2013, 12:20:34 PM »
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Great! Thanks! Makes everything clear now. Just waiting for me EEPROM programming in the mail (didn't wanna mess with doing it via OBD for now, and it's good to have a solid backup plan).
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golfdubcrazy
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« Reply #302 on: June 12, 2013, 08:32:57 AM »
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hi i know this is abit late just wondering does the software put the ecu into bootmode or do i need to open the ecu thanks
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dream3R
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« Reply #303 on: June 13, 2013, 04:17:13 AM »
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You have to open the ecu and put it in-to bootmode, then run the software.
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ThaZ
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« Reply #304 on: June 13, 2013, 04:17:32 PM »
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Looks like a great tool for the EDC16C39 with 95640 EEPROM !
But will it work with that EEPROM and galetto clone ?
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DND
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« Reply #305 on: June 27, 2013, 04:04:06 PM »
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Thanks , it is really working on ME7.5 .  |
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20VTMK1
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« Reply #306 on: July 02, 2013, 01:05:59 PM »
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ffff - sum of octets. that chksum starts @ 0x10. try using a hex calculator and you will see.
Finally figured this out and tested it , for the newbies like me .. Add up 0X00001 to 0X00010 (upto just before the check sum start) = Y FFFF - Y = AB CD , but reverse this for the checksum IE CD AB Do the same for the next line but use FFFE - Z Hope this is clear .. |
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guitar24t
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« Reply #307 on: July 20, 2013, 08:27:16 PM »
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Hi,
Is there any source code available for this utility? I am attempting to flash the EEPROM on Volvo ME7 ECUs. I am experiencing the same problems as described before with writing back the EEPROM contents. Reading seems to work fine. I was hoping to figure out what part of the writing process is failing on these ECUs and attempt to correct it.
Thanks,
Rob
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gremlin
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« Reply #308 on: August 25, 2013, 01:59:29 PM »
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Once I urgently needed to reprogram eeprom in last HW versions ME7.1.1 ECUs with ST10F275 inside. No apropriate tools are around, me7eeprom soft not operate because of unknown IDCHIP value. Than I made 5 minute patch in 1.40 version of programmer (ArgDub, please sorry) and can do job.
Below is screen log. A3 3.2 DSG 2008 (022906032LA) ECU
D:\ME7 Eeprom Reader\1.40\me7eeprom --bootmode 95160 --CSpin P6.3 -r -p1 eeprom.bin
ME7_EEPROM v1.40
COM: 1, Baud Rate: 10400
Memory type: 95160, size: 2048
Chip Select pin: P6.3
Opening COM1 ... OK
Starting Boot_mode ... uC ID response 0xD5 ... OK
Sending Loader + MonitorCore ... MonitorCore successfully launched
Reading IDCHIP ... 0x1143: C167/ST10F OK
Initializing registers ... OK
Sending EEPROM driver ... OK
Configuring SPI Interface ... OK
Checking EEPROM Status Register ... 0x0080
Reading EEPROM ... OK
File saved
Closing COM1
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dream3R
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« Reply #309 on: August 28, 2013, 10:48:35 PM »
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Hi,
Is there any source code available for this utility? I am attempting to flash the EEPROM on Volvo ME7 ECUs. I am experiencing the same problems as described before with writing back the EEPROM contents. Reading seems to work fine. I was hoping to figure out what part of the writing process is failing on these ECUs and attempt to correct it.
Thanks,
Rob
I spoke with the author about this issue and the thought was that it was a bug in the driver. Unfortunately he didn't have an ECU to test and didn't seem too interests (Can't blame him lol). I ended up just soldering. The older <04 ECU's work fine though. Use a hot air station, imo. I don't think the code is available. |
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guitar24t
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« Reply #310 on: August 29, 2013, 05:03:58 AM »
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That's a shame. Oh well. I just bought a SOIC8 clip and program the chip directly on the board.
Would have been nice to get this working, though.
I thought I tried writing to the 2002-2004 ECUs with no luck as well, but I might be mistaken.
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ddillenger
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« Reply #311 on: August 29, 2013, 08:56:42 AM »
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That's a shame. Oh well. I just bought a SOIC8 clip and program the chip directly on the board.
Would have been nice to get this working, though.
I thought I tried writing to the 2002-2004 ECUs with no luck as well, but I might be mistaken.
You have a 50 percent chance of reading on the board, and about a 10 percent chance of writing. Most of the time I have to remove the eeprom. |
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Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your experience!
Email/Google chat:
DDillenger84(at)gmail(dot)com
Email>PM
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guitar24t
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« Reply #312 on: August 29, 2013, 10:30:35 AM »
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You have a 50 percent chance of reading on the board, and about a 10 percent chance of writing.
Most of the time I have to remove the eeprom.
That's odd. I haven't had any problems reading or writing. My biggest problem was getting the clip seated properly. Once I got the hang of it, I had no further problems. Depending on the ECU, it might be necessary to bridge the crystal oscillator with a capacitor or a wire. |
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Bosse
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« Reply #313 on: September 01, 2013, 03:21:26 PM »
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Volvo users
This is old notes,i wrote it down last year.
Hopes it right.
Siemens CS P4.7
Infineon as u know CS P8.2
EDC15 CS P2.3
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elRey
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« Reply #314 on: September 11, 2013, 02:53:03 PM »
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 06A906032RF 0261208561 Starting Boot_mode ... uC indentification response = 0xD5. Not support. (error=0x01) Is there anything I can do to read/write this eeprom? Thanks, Rey |
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