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k0mpresd
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« Reply #300 on: January 24, 2016, 05:35:23 PM »
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i have volvo gen2 here as well along with land rover gen4.
volvo doesnt seem to have watchdog wired. neither does the LR, both are missing the 8 pin IC.
also, dont see a k-line transceiver on any of them. the canbus transceiver is there though.
so bootmode may only be possible via TTL. or maybe i just missed it.
im assuming P3.9, pin 76 is k-line Tx. id have to remove the c167 from one of the boards to check underneath but i dont find any type of connection to it anywhere on the board.
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dream3R
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« Reply #301 on: January 24, 2016, 09:24:26 PM »
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i have volvo gen2 here as well along with land rover gen4.
volvo doesnt seem to have watchdog wired. neither does the LR, both are missing the 8 pin IC.
also, dont see a k-line transceiver on any of them. the canbus transceiver is there though.
so bootmode may only be possible via TTL. or maybe i just missed it.
im assuming P3.9, pin 76 is k-line Tx. id have to remove the c167 from one of the boards to check underneath but i dont find any type of connection to it anywhere on the board.
Yes I remember the kline is missing on Volvo, it was some time ago though. They accept a bootloader over can for flash though. Sure it was a C167 CR too? |
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k0mpresd
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« Reply #302 on: January 24, 2016, 10:28:55 PM »
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Yes I remember the kline is missing on Volvo, it was some time ago though. They accept a bootloader over can for flash though. Sure it was a C167 CR too?
gen2 volvo is c167cs-lm, same as the vw and gen4 LR is st10f272. no M like on the golf r gen4. BL via CAN would be the way to go for sure. |
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DT
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« Reply #303 on: January 25, 2016, 02:02:15 AM »
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I've not made much progress, need to work more on my minimon driver for gen1. I get what seems to be boot mode but end up in normal mode, probably after software fault causing soft-reset which does not care about p0L.4 held low.
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« Last Edit: January 25, 2016, 02:14:55 AM by DT »
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dream3R
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« Reply #304 on: January 25, 2016, 10:54:48 AM »
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disable the watchdog with the first instruction  |
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DT
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« Reply #305 on: January 25, 2016, 11:46:32 AM »
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disable the watchdog with the first instruction Well, the watchdog is not my problem. |
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« Last Edit: January 25, 2016, 11:50:17 AM by DT »
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nyet
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« Reply #306 on: January 25, 2016, 11:54:42 AM »
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software fault causing soft-reset which does not care about p0L.4 held low.
That would likely be the watchdog |
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dream3R
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« Reply #307 on: January 25, 2016, 12:41:20 PM »
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That would likely be the watchdog
It's the first instruction in the Volvo loader so I thought it might help you  |
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DT
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« Reply #308 on: January 25, 2016, 12:43:13 PM »
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That would likely be the watchdog
Well I keep the watchdog under control with 20Hz signal feed to the unit since I've not found in code how and if it is the CPU that generate the watchdog signal. Besides it does not happen after the 800ms that ccyberwing discovered but rather later in process. |
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DT
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« Reply #309 on: January 25, 2016, 12:44:12 PM »
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It's the first instruction in the Volvo loader so I thought it might help you Hmm, have to look into that. You mentioned that before I think, but I didn't look at it then. |
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DT
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« Reply #310 on: January 25, 2016, 12:53:14 PM »
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It's the first instruction in the Volvo loader so I thought it might help you edit: stupid post by me but still I don't think it got anything to do with this since it is an internal wdt |
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« Last Edit: January 25, 2016, 01:00:00 PM by DT »
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dream3R
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« Reply #311 on: January 25, 2016, 03:40:19 PM »
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The first instruction is:
diswdt
then it look like it's reading can buffers not looked it much.
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dream3R
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« Reply #312 on: January 25, 2016, 03:44:56 PM »
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That would likely be the watchdog
My thoughts to hence the post also some stuff here http://www.infineon.com/dgdl/ap1601210_Bootstrap_Loader_IDB.pdf?fileId=db3a304318a6cd680118cb945a2140bchttp://embedded.ifmo.ru/embedded_old/UK/KIUS/C167/CHAP17.PDFMore important perhaps http://embedded.ifmo.ru/embedded_old/UK/KIUS/C167/CHAP12.PDFTo allow recovery from software or hardware failure, the 80C166 provides a Watchdog Timer. If the
software fails to service this timer before an overflow occurs, an internal reset sequence will be
initiated. This internal reset will also pull the RSTOUT pin low, which also resets the peripheral
hardware, which might be the cause for the malfunction. When the watchdog timer is enabled and
the software has been designed to service it regularly before it overflows, the watchdog timer will
supervise the program execution, as it only will overflow if the program does not progress properly.
The watchdog timer will also time out, if a software error was due to hardware related failures. This
prevents the controller from malfunctioning for longer than a user-specified time.
The watchdog timer provides two registers: a read-only timer register that contains the current
count, and a control register for initialization.
It's serviced by the OS? |
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DT
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« Reply #313 on: January 25, 2016, 04:14:12 PM »
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from chap17.pdf
The watchdog reset cannot occur while the C167 is in bootstrap loader mode!
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k0mpresd
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« Reply #314 on: January 25, 2016, 05:30:00 PM »
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im no programmer or disassembler, so im really reaching here, but does anyone have any idea how to disable the chksum check in these files?
if you do, i may have something to trade for the info.
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